THE SCIENTIST VOLUME 7, No:20 October 18, 1993 (Copyright, The Scientist, Inc.) Articles p
THE SCIENTIST
VOLUME 7, No:20 October 18, 1993
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October 18, 1993
NEWS
INTEGRATED BUT UNEQUAL: Recent efforts by National Institutes of
Health administrators to confront long-standing inequities in the
status of women scientists may meet with resistance within
specific institutes, officials and women researchers say
PAGE : 1
LASKER AWARDS: The winners of this year's Lasker Foundation
awards in biomedical science were researchers whose studies have
current or future clinical applications, a reflection of the
foundation's concern that the importance of basic research be
part of the agenda in national health care reform
PAGE : 1
ANIMAL RIGHTS DAMAGE REPORT: A congressionally mandated report,
recently produced and released by the Justice Department, on the
extent of acts of property damage committed by animal rights
groups documents 313 such incidents, with university research
facilities being the most frequent targets
PAGE : 1
AFTER RIO, REAL PROGRESS: A year and a half after the summit,
progress is being made on agreements and treaties reached at the
United Nations Conference on Environment and Development (UNCED)
held in Rio de Janeiro, according to a report by an environmental
watchdog group, with several countries ratifying the documents
and the United States playing a substantial role
PAGE : 3
OPINION
UNHEARD VOICES: With all of the hand-wringing, initiatives, and
discussions aimed at improving science education in the United
States, rarely have the subjects of this national attention--the
students--been consulted on their views of the situation. There
are several fundamental ways, many of them costing little or no
money at all, to instill skills and enthusiasm in science
classes--if administrators and policymakers are willing to take
some advice--say six University of Miami science undergraduates
PAGE : 11
COMMENTARY: During his long career as a biochemist, author, and
teacher, J. Murray Luck made an enormous impact on the science
community, the most enduring among his achievements being the
launch of Annual Reviews, says William Kaufmann, the series'
current editor-in-chief
PAGE : 12
AIDS INVESTIGATIONS: Rapidly working its way up the list of
highly cited AIDS papers are ones produced by biotech and
pharmaceutical firms, according to the newsletter Science Watch
PAGE : 14
HOT PAPERS: A molecular biologist discusses T cell longevity
PAGE : 15
PERFUSION PROFUSION: For years, neuroscientists have relied on
homemade perfusion systems in their studies of cell membranes and
the substances passing in and out of cells across them. Now,
several research-scale perfusion systems are commercially
available
PAGE : 18
JOB QUEST: In the current economy, the job search is apt to be
anxiety-ridden; but some techniques make the quest more
productive.
PAGE : 20
FRANCE CORDOVA, head of the department of astronomy and
astrophysics at Penn State University, has been appointed chief
scientist for the National Aeronautics and Space Administration
PAGE : 22
NOTEBOOK
PAGE : 4
CARTOON
PAGE : 4
LETTERS
PAGE : 12
CROSSWORD
PAGE : 13
SCIENTIFIC SOFTWARE DIRECTORY
PAGE : 30
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Lasker Awards Celebrate Biomedical Scientists For Their
Advances In Health-Related Research
As U.S. health care system is undergoing review, this year's
prestigious prizes emphasize the inherent value of basic
investigations
AU : BARBARA SPECTOR
TY : NEWS
PG : 1
In selecting the recipients of its 1993 medical research awards,
the Albert and Mary Lasker Foundation has singled out three
scientists whose basic investigations have current or future
clinical applications. A foundation official says he hopes that
honoring these individuals at a time when the United States
health care system is undergoing revision will convey a message
to President Bill Clinton and the public about the importance of
basic research.
Gunter Blobel, John D. Rockefeller, Jr. Professor at Rockefeller
University in New York and a Howard Hughes Medical Institute
investigator, received the Albert Lasker Basic Medical Research
Award for his studies of protein sorting and targeting. Donald
Metcalf, a research professor of cancer biology at the Walter and
Eliza Hall Institute of Medical Research, Melbourne, Australia,
won the Albert Lasker Clinical Medical Research Award for
discovering colony stimulating factors (CSFs), hormones that
control white blood cell formation and resistance to infections.
Nancy S. Wexler, a professor of clinical neuropsychol-ogy at
Columbia University's College of Physicians and Surgeons in New
York, was selected to share the Albert Lasker Public Service
Award for her work on Huntington's disease. Her co-recipient is
Paul G. Rogers, a former Democratic Florida congressman (1955-79)
who chaired the House subcommittee on health and the environment.
The 1993 awards were presented at an October 1 luncheon in New
York. First lady Hillary Rodham Clinton, architect of U.S. health
care reform, was the keynote speaker. "These winners join a
remarkable group . . . men and women whose work has found cures
for disease, who have aided the kind of breakthroughs that we've
only been able to dream about in the past but now take for
granted," Clinton said. "This is a time when the past and the
present in medical research join together to point us to a new
future. And it is one that I think all of us have a
responsibility and an obligation to help shape."
Jordan U. Gutterman, director of the Lasker awards program and
chairman of clinical immunology and biological therapy at the
University of Texas M.D. Anderson Cancer Center in Houston, says
Metcalf and Blobel's work proves that basic research is not as
far removed from patient care as the layperson might believe.
CSFs, the subject of Metcalf's research, Gutterman points out,
are now being used to promote blood cell formation and resistance
to infection in cancer patients. "He--along with others--started
a whole field and developed it over the past several decades to
the point of clinical application now," Gutterman says.
Likewise, says Gutterman, Blobel's studies of protein transport
across cellular membranes have "incredible applications in basic
biology, but also practical applications," including treatment of
diseases involving localization of proteins, such as cystic
fibrosis.
Wexler is a key member of the Huntington's Disease Collaborative
Research Group, which last March pinpointed the gene causing the
disease (Cell, 72:971-83, 1993). Beyond her research activity,
she has devoted herself to fostering a greater public
understanding of the importance of basic science, Gutterman says.
"She is an individual who has tried to balance science and public
service," he says.
A Nobel In The Future?
Each Lasker winner receives or shares a $25,000 prize--increased
this year from $15,000. Winners also receive a statuette of the
Winged Victory of Samothrace, the Lasker Foundation's symbol of
"victory over disability, disease, and death."
And, if tradition holds, there may be another award in the cards
for Blobel or Metcalf. In the 46 years that the Laskers have been
presented, 50 recipients of the basic or clinical research award
have gone on to win the Nobel Prize. Given Blobel and Metcalf's
impressive citation records, this may indeed be a possibility. In
1981, both men's names appeared on a list of the 1,000 most cited
contemporary scientists for the period 1965-78 compiled by the
Philadelphia-based Institute for Scientific Information (E.
Garfield, Current Contents-Life Sciences, Oct. 12, 1981, pages 5-
14).
The New York-based Lasker Foundation was established in 1944 by
Albert Lasker, the late owner of the Lord & Thomas advertising
agency, and his wife, Mary, who has long been an advocate of
biomedical research. "She has understood better than most of us
ever do that the work that takes place in our
laboratories...[and] the work that takes place in the halls of
Congress are all devoted to enhancing life," said Clinton at the
awards ceremony. The awards, once presented annually, have been
given every other year since 1991 to honor those making
significant contributions in basic and clinical research.
Protein `Zip Codes'
In 1975, Blobel developed the "signal hypothesis," postulating
that translocation of proteins across intracellular membranes is
accomplished via "signal sequences"-- series of 15 amino acids,
on average. The signal sequences, he explains, are targeted to
one specific cellular membrane; thus, they function as a "zip
code addressed to the proper membrane."
Blobel, now 57, published this hypothesis in a landmark paper (G.
Blobel, B. Dobberstein, "Transfer of proteins across membranes.
I. Presence of proteolytically processed and unprocessed nascent
immunoglobulin light chains on membrane-bound ribosomes of murine
myeloma," Journal of Cell Biology, 67:835-51, 1975), which has
been cited more than 2,300 times. Its companion paper (G. Blobel,
B. Dobberstein, "Transfer of proteins across membranes. II.
Reconstitution of functional rough microsomes from heterologous
components," J. Cell Biol., 67:852-62, 1975) has been cited
nearly 850 times.
The signal hypothesis, Blobel says, "was conceived without much
evidence, but most of the predictions turned out to be correct."
It wasn't until more than 15 years after publication of these
papers, however, that "the last facet" of the hypothesis was
confirmed, Blobel says. A pair of papers (S.M. Simon, G. Blobel,
Cell, 65:371-80, 1991; S.M. Simon, G. Blobel, Cell, 69:677-84,
1992) reported the existence of a "protein-conducting channel,"
the mechanism of trans- location. "The protein-conducting channel
proved very difficult; it had to be tricked to reveal itself,"
Blobel says. "That was the most fun of my entire career."
Joshua Lederberg, University Professor at Rockefeller and a
former president of that institution, says the signal hypothesis
has important implications for genetics: "Genetic defects may be
[malfunctioning] signal peptides."
Lederberg says that at Rockefeller, Blobel is respected for his
amiability as well as for his work: "He's very popular on campus,
and engaged with the life of the campus." In addition, Blobel is
known for his "high moral principle," Lederberg says; "he gets
exercised when he sees something that violates" his ethical
standards.
Blobel received his M.D. from the University of Tbingen in his
native Germany in 1960. In 1963, he came to the United States as
a Ph.D. candidate in oncology in the lab of Van Rensselaer Potter
at the University of Wisconsin, Madison, concentrating on
ribosome-membrane interaction.
At Wisconsin, he wrote his second-most-cited paper (G. Blobel,
V.R. Potter, "Nuclei from rat liver: Isolation method that
combines purity with high yield," Science, 154:1662-5, 1966),
which has been referenced in more than 1,400 publications to
date. "He was always enthusiastic and full of ideas about his
research," Potter recalls.
After earning his Ph.D. in 1967, Blobel came to Rockefeller--
where he has been ever since--as a postdoc in the lab of George
Palade, studying the mechanisms of membrane-bound ribosomes in
the synthesis of secretory proteins. This work later led to
development of the signal hypothesis. He received the Gairdner
Award, another Nobel "predictor," in 1982. He is a member of the
National Academy of Sciences.
Blood Cell Formation
In the mid-1960s, while Blobel was finishing up at Wisconsin and
moving to Rockefeller, Metcalf was developing a breakthrough
cloning technique, enabling researchers to study the cellular
basis of blood cell formation in vitro using large numbers of
cells.
His paper describing this technique (T.R. Bradley, D. Metcalf,
Australian Journal of Experimental Biology and Medical Science,
44:287-300, 1966) has been cited in more than 1,800 papers.
"His studies of hematopoiesis [formation and development of blood
cells] in the mouse set the stage for everything we know about
hematopoiesis in man," says David Nathan, physician in chief at
Children's Hospital in Boston and Robert A. Stranahan Professor
of Pediatrics, Harvard Medical School. "Those experiments of the
'60s have stood the test of time."
A result of the development of these cultures was Metcalf's
discovery--followed by purification and, years later, mass
production--of CSFs, which now result in shorter hospital stays
for patients and more intensive chemotherapy. About 25 such blood
hormones have now been identified.
Purification of CSFs proved a tricky business because of the low
concentration of the hormones in the body. Metcalf and colleagues
tried to purify them from human urine but found that they were
only a minor urinary component. Coauthor E. Richard Stanley (E.R.
Stanley, D. Metcalf, Aust. J. Exp. Biol. Med. Sci., 47:467-83,
1969) recalled in a Current Contents-Clinical Medicine classic
commentary (May 18, 1981, page 20): "It became clear . . . that
considerable volumes of urine would be required. The resources of
the entire male staff of the Institute were mobilized and urine
was collected in white buckets placed by the urinals. These
buckets, with their accompanying poster requesting contributions
(and subsequent graffiti), became an Institute conversation
piece."
Like Blobel, Metcalf had to wait many years before seeing the
full realization of his theory--in his case, animal studies with
CSFs, leading ultimately to their use in clinical practice. "The
direct test wasn't till the mid-'80s," Metcalf says. "The proof
had to wait 20 years, because it was impossible either to
synthesize these molecules--they're too big--or to purify enough
material from the tissues to inject in an animal. The
breakthrough that was needed was the entry of molecular biology."
It thus became possible to isolate the genes that code for CSF
production and express recombinant CSFs in bacteria or yeast.
Metcalf's paper "The molecular biology and functions of the
granulocyte-macrophage colony-stimul- ating factors" (Blood,
67:257, 1986) had received 685 citations as of June 1993,
remarkable for a paper only six years old.
Metcalf, 64, is referred to by several of his colleagues as "a
role model," not only for his research but also for the interest
he takes in the work of others. "He tackles problems in a simple
and straightforward way," says Nathan. "His experiments are
beautifully designed, and have revealed an enor- mous amount of
information."
"I can't think of one aspect of experimental hematology that his
observation isn't in some way connected to," says David Williams,
Kipp Investigator of Pediatrics at Indiana University School of
Medicine, Indianapolis, and an associate investigator of the
Howard Hughes Medical Institute.
"He's very, very keen to learn new things, to continue to try to
contribute to the field, to help young people just coming into
the field," Williams says.
Metcalf received his M.D. from the University of Sydney in 1953.
He has been at the Walter and Eliza Hall Institute since 1966,
except for several intervals as a visiting scientist at
institutions in the U.S. and Europe. An NAS foreign associate,
Metcalf has received the Royal Society of London's Wellcome Prize
(1988), among other honors.
Fighting Hereditary Disease
Wexler "has devoted at least most of her waking hours, and
possibly her REM hours, too," to conquering Huntington's disease,
says Huntington's researcher P. Michael Conneally, Distinguished
Professor of Medical and Molecular Genetics and Neurology,
Indiana University Medical Center, Indianapolis. Her activity in
this area dates from 1968, when she found out her mother had the
disorder and that she herself was at risk. She did her Ph.D.
dissertation on the neuropsychological and emotional consequences
of being at risk for the disease, earning her doctorate in
clinical psychology from the University of Michigan in 1974.
Wexler, 48, is president of the Santa Monica, Calif.-based
Hereditary Disease Foundation, founded by her father, Milton
Wexler, 25 years ago. The foundation sponsors workshops bringing
together scientists working on similar biological questions in
hereditary disease.
Wexler notes that the majority of researchers invited to the
workshops do not work on Huntington's; the foundation selects
investigators focusing on related areas to foster productive
exchanges with Hunting- ton's researchers and "make a much wider
mark," she says.
Wexler believes it's important to have researchers understand the
clinical implications of disease. "We always start workshops by
having someone with Hunting-ton's speak to the scientists," she
says. "At the lab bench, [scientists] may see the DNA repeats"
characteristic of Huntington's, she says, but meeting a person
who has it enables them to grasp the "massive rippling effect
within the whole family."
A genetic marker for Huntington's disease gene was found in 1983
and was reported in a paper coauthored by Wexler (J.F. Gusella,
et al., Nature, 306:234, 1983), which has been cited in more than
900 publications to date. Despite this early success, it took 10
years to isolate the gene itself, and much more work remains to
be done before gene therapy is possible. The Hereditary Disease
Foundation's grants for research on Hunting-ton's and allied
disorders are essential to sustain labs during these long years
of work, according to Marie-Fran~oise Chesselet, a professor of
pharmacology at the University of Pennsylvania in Philadelphia.
The grants, says Chesselet, "allowed [researchers] to have part
of their lab continually working on Hunting-ton's during the
years when it was so easy to be discouraged."
Wexler and her foundation have fostered several collaborations of
Huntington's researchers. One, the Huntington's Disease
Collaborative Research Group--an alliance of six labs in the
U.S., England, and Wales--discovered the gene last March. Another
collaboration, known as "centers without walls," involves two
interdisciplinary, interinstitutional research centers based in
Boston and Baltimore. "The ethos in Huntington's all along has
been not to be bounded by artificial borders," Wexler says.
Scientists say Wexler kept the collaborations running smoothly.
"She was the driving force behind keeping people working
together," says Chesselet. "She provided fund-raising efforts and
also psychological drive." Wexler acknowledges her role in
motivating the scientists: "If they see me, they know that I'm at
risk. I represent all the families they got to know and to like."
Wexler's 1979 expedition to Venezuela to collect genetic data
from the largest known extended family with Huntington's disease-
-more than 13,000 people--was a key contribution to locating the
gene and developing a test for it. After seeing a presentation by
Venezuelan physician Americo Negrette at a 1972 conference,
Wexler recalls, "I thought that Venezuela was the answer, but we
just had to figure out the question."
"The Venezuela family was pretty important for determining the
[genetic] linkage," says Margaret Wallace, an assistant professor
of genetics at the University of Florida, Gainesville. Wallace
speculates that location of the gene might have taken another
year without the Venezuelan blood samples. "When you've got a
family to study of that size, you've got the best chance
possible."
Wexler's other activities include chairing the Ethical, Legal,
and Social Issues Working Group of the Human Genome Project,
which involves discussing the genome project with the public.
While nonscientists "don't understand [the work] on a scientific
level," Wexler says, "they understand on an emotional and
practical level--and that's what counts. People know that
diseases run in families; there's a gut appreciation of
heredity." Thus, she says, when the project is explained to them,
people understand the rationale behind "finding all of their
genes and [discovering] what they do. I hope that as people
understand, they will push for more resources put in."
Gutterman says the fact that a Huntington's disease researcher
has received the Lasker Public Service Award "does not rule out
eventually a research award" given for work on the disease if
research in the area progresses. One of the criteria assessed
during the judging, he says, is the "maturing" of the field under
consideration: "Is it ready for this particular field? Are there
more experiments that need to be done?"
Gutterman says that when nominations are reviewed "it's
astonishing to see the rate of knowledge that's occurring. The
deliberations are a detailed, soul-searching, mind-searching
experience. It's quite exciting--no, that's too mild a term--it's
exhilarating."
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Sex Discrimination Controversies Continue To Plague
Health Agency
Some NIH insiders fear an entrenched culture could thwart efforts
to improve conditions for women scientists
AU : FRANKLIN HOKE
TY : NEWS
PG : 1
Recent efforts by National Institutes of Health administrators to
address agencywide inequities in the status of women scientists
may be frustrated by resistance within specific institutes,
agency officials and women researchers say.
A number of these remedial actions are in direct response to a
June 1993 report produced by an internal Task Force on the Status
of NIH Intramural Women Scientists. Using newly assembled data,
the task force found that "disparities and inequities exist for
NIH intramural women scientists with regard to pay, tenure,
promotion, and visibility," and suggested avenues to remedies
(see story on page 17). Hynda Kleinman, a research chemist and
section chief at the National Institute of Dental Research,
chaired the task force.
"The [NIH] administration has been very responsive," Kleinman
says, citing Lance A. Liotta, the deputy director for intramural
research, as particularly so. "But I would say that when you get
down to the scientific directors, there's been less
accountability."
Changes in place as of late last month that are intended to
improve the professional prospects of NIH's women scientists
include a new tenure policy--NIH tenures scientists much as
academia does--designed to ease conflicts between family
obligations and the tenure-track schedule; the appointment of a
woman scientist adviser to the scientific director of each
institute to confer on gender issues; and a sharp rise in the
representation of women as speakers at NIH-sponsored scientific
meetings.
At this point, the administration "has implemented or is in the
process of implementing every single recommendation" of the task
force report, according to NIH spokes- woman Anne Thomas.
To be sure, however, a number of high-profile, unresolved cases
of sex discrimination at NIH cloud this view. Women scientists
who say they have been victimized speak of a deeply entrenched
hierarchical, sexist culture at the institutes. And they say the
sexism tends to target the best and the brightest of young women,
effectively pushing them out of research. The loss to science--as
well as to the individual women--is substantial, they say.
Kleinman herself, although encouraged by the response from the
NIH administrators, acknowledges that the problems run deep. She
concurs with a widely held view that the culture of science is
generally discriminatory against women, but she says that NIH
does not differ greatly from many universities in that respect.
She does, however, see unique organizational differences between
universities and NIH that serve to exacerbate difficulties for
women at the health agency.
"At NIH, the system doesn't depend on grants," Kleinman says. "It
depends on your relationship with your boss. At a university,
women have the basis of their grants to help them hold their
positions and to help them move up. The more grants they get, the
more promotions they're going to get. And you can't take lab
space away from someone who's got a grant."
Administrators, too, acknowledge that the hierarchical structure
of NIH labs may serve to stymie improvement in the status of
women scientists there. But they insist that, even so, the
situation is no worse at the institutes than in university-based
biomedical research settings. And they say they are committed to
improving conditions for women.
"Something like 40 to 50 percent of the graduate students in
biological sciences are women these days," says Ruth Kirschstein,
acting director of NIH, speaking of the universities. "And in
medical schools, something in the order of 30 to 40 percent are
women. So the issue is not getting them interested and having
them go through their programs to get advanced degrees."
The issue, she suggests, is that women scientists in university
settings have difficulty being promoted to senior positions, with
ever-declining representation at higher rungs on the career
ladder.
"And it's sort of the same thing here," Kirschstein says. "They
go through postdoctoral training, and then the question is, what
happens to them as they move into independent careers, as they
move into tenure track and being tenured? And that's where the
entire system, for women, falls apart. There are far fewer women
in tenure track at NIH--and at universities and medical schools.
There are far fewer women in tenured positions, and there are
very few women who are in high-level administrative positions."
The New Numbers
One of Kleinman's contributions to the debate over sexism at the
institutes was to enlist the help of Michael Fordis, director of
the NIH's three-year-old Office of Education, in assembling hard
new data to inform discussions about pay, tenure, promotion, and
visibility. One of Fordis's primary responsibilities is
recruitment of young scientists into the intramural program.
"You can't recruit the best and the brightest if there are
perceived barriers," Fordis says. "And we felt that we should
make certain that we had numbers to see where the problems are,
because there are very different solutions [possible]."
For example, to assess the pay levels of men and women
scientists, Fordis matched pairs of scientists on the basis of
their educational degrees, the number of years since graduation,
and other factors. From the overall pool of about 1,200
individuals, he identified 77 matched pairs--although in some
cases in which three individuals could be matched, the
information for all three was included in the "pair." In 77
pairings, men earned $3,300 more than women, on average.
The new view provided by Fordis's number-crunching had an
important impact on the NIH community.
"People are very angry about the pay issue, very angry," says
Kleinman. "You just look at the pay data, and you get ill."
The problem now facing the agency administration is how to
respond to this information. Because of the difficulties he had
in matching pairs, Fordis suggests that assessing comparable pay
levels will be problematic. It will involve looking closely at
each institute and, ultimately, each individual and making
judgments.
"There's not an across-the-board formula that can be applied,"
Fordis says, "but surely people can look and rectify any areas in
which there are inequities."
The numbers assembled by Fordis, largely a statistical
portrait of women scientists' problems at the institutes, also
show a few encouraging signs. For example, although tenured women
represent only about 18 percent of the total tenured scientists
at NIH, 45 percent of scientists granted tenure in 1992 were
women, a figure much closer to--even a bit above--their
representation in the pool of candidates. The 1992 number was a
sharp jump up from rates over the previous decade, which had
hovered between 15 and 25 percent. Of course, the potential long-
term significance of a one-year improvement remains to be seen.
On the visibility issue, too, Kleinman notes that historically
women were rarely invited to deliver the important sponsored
lectures on campus. The prestigious Dyer Lecture, for example,
was given by a woman only once in the 37 times it was delivered
between 1951 and 1990. This year, however, women received nearly
all of the lectureships, Kleinman says, in response to complaints
from her group.
The Best And Brightest
The importance of confronting sexism in the laboratories of the
nation's top biomedical research organization, in order to keep
talented women scientists in science, is emphasized by all
parties--administration officials, women scientists, and critics
of NIH. Those most critical of the environment confronting women
at NIH charge that, in fact, it is precisely the most talented
women who are most victimized at NIH, the ones whose research is
most likely to be appropriated, for example, without proper
credit.
"If you are not an efficient or inspired [female] researcher,
they leave you alone, and you can work for years undisturbed,"
says one congressional committee staffer, on condition of
anonymity. Her committee has been investigating scientific
misconduct at NIH, including possible links to sexism, racism,
and other discriminatory behavior. "It's only the ones who really
accomplish something who have anything to fear."
Viola Young-Horvath, executive director of the Federation of
Organizations for Professional Women in Washington, D.C., agrees.
"It's often the best and the brightest of the women who are
discriminated against," she says. "I think there is more of it at
NIH simply because you have a concentration of some of the most
brilliant, competitive people in the world of science at NIH."
Young-Horvath points to the case of Margaret Jensvold as a prime
example. With especially strong academic credentials--she was
selected by the Association for Academic Psychiatry as one of the
six most promising residents in the country--Jensvold came to the
National Institute of Mental Health in 1987 to study premenstrual
syndrome. There, she says, as the only woman researcher in her
area, she was denied important professional opportunities made
available to male fellows. On Feb. 28, 1994, Jensvold's case will
go to trial in U.S. District Court in Baltimore.
Jensvold, now director of the Institute for Research on Women's
Health in Washington, says that, as a result of the problems, she
was forced to abandon her research.
"My career was taken from me, my research was taken from me, and
promising work wasn't done, because of the way they viewed me as
a woman," Jensvold says.
Jensvold is one of several women with sex discrimination
complaints against NIH who believe that the problems are linked
to the hierarchical power structure of the labs there.
"There is a gender problem here," says Jensvold. "But, once you
scratch beneath the surface, we're really talking about much
bigger stuff having to do with the whole misuse of power in the
workplace."
Young-Horvath concurs, suggesting that the predation of more
powerful, usually senior, male scientists on the creativity of
other scientists viewed as less powerful is not unusual.
"And who would you choose to do it to?" she asks. "You'd choose
the scientists that, in your mind, you conceived of as being
weakest or most vulnerable, and that's frequently women."
"That's the way it is at NIH," says Maureen Polsby, a neurologist
with a sex discrimination and research fraud case against NIH
that has gone from U.S. District Court in Baltimore to the
Supreme Court and back over the past five years. "If you are a
woman, you are perceived as easy to take advantage of and someone
who can be exploited."
Billie Mackey, president of SelfHelp for Equal Rights, an
informal employment rights group at NIH, calls appropriation of
research one of the most devastating aspects of sex
discrimination at NIH for women scientists.
"These young, bright women bring a lot of their creative ideas
into the laboratory, and many times these ideas are stolen,"
Mackey says. "Many of them are so discouraged that they leave NIH
and they leave research."
Saru Devi is a former NIH researcher from India who is struggling
not to be pushed out of science. This year, she filed complaints
with the NIH's Office of Equal Opportunity for discrimination on
the bases of sex and ethnicity and the Department of Health and
Human Service's Office of Research Integrity for theft of
research. She says that, despite the skepticism and resistance of
her supervisors at NIH, she successfully developed a vaccine for
cryptococcal meningitis, a fungal disease that kills
approximately 10 percent of people with AIDS. After the vac-
cine's success was demonstrated, she says--a patent application
has been submitted by NIH for the discovery--she was pushed out
of the lab and the work turned over to others.
In May, at the American Society for Microbiology meeting in
Atlanta, she says she watched from the audience as another
researcher presented her data as his own--including showing a
graph she herself had prepared. She was given only an
acknowledgment, she says, for work on which she feels she should
be first author.
Since then, she has fought to receive the credit she feels she
should have, but she says the experience has been traumatic.
"Coming from a foreign country, looking at NIH as the best place
and NIH scientists as the role models and then working so hard,
being a mother of a small child, working over the weekends and 10
hours a day to achieve something, and then to undergo all these
things is something very terrible," Devi says. "If they take my
patent away and make money out of it, it doesn't bother me at
all. But my work--it's my whole life."
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : TASK FORCE RECOMMENDATIONS
TY : NEWS
PG : 17
In June, the internal Task Force on the Status of NIH Intramural
Women Scientists made the following recommendations to agency
officials:
* A woman scientist adviser to the scientific director of each
institute, center, or division should be appointed to increase
and enhance effective communication between women scientists and
the administration.
* Compensation should be equalized throughout NIH, where
appropriate.
* A uniform tenure plan should be established at NIH.
* A uniform NIH promotion plan should be established,
implemented, monitored, and evaluated.
* The visibility of intramural women scientists of all racial and
ethnic groups should be increased by including them in greater
numbers at NIH forums and at NIH-supported meetings.
* A family-leave flextime plan for NIH should be established,
uniformly implemented, monitored, and evaluated.
* The position of NIH woman scientist coordinator should be
established in the office of the deputy director for intramural
research to implement the recommendations of this task force and
to communicate the concerns of intramural women scientists,
including those of minority women scientists, to NIH's deputy
director for intramural research and its director.
Source: The NIH Catalyst, June 1993.
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Unprecedented Justice Department Report Documents Extent
Of Animal Activist Attacks On Research Labs
Academic facilities are the most frequent targets of assault by
animal rights advocates, congressionally mandated study reveals
AU : RON KAUFMAN
TY : NEWS
PG : 1
A report released last month by the United States Department of
Justice states that, since 1977, at least 313 acts of what it
categorizes as animal enterprise terrorism have occurred. Such
attacks, the report says, peaked in frequency several years ago.
However, according to the report's authors, the violent nature of
attacks has not diminished, with the majority of incidents being
perpetrated at university research centers.
The study, called "Report to Congress on the Extent and Effects
of Domestic and International Terrorism on Animal Enterprises,"
is the first time such incidents have been specifically
documented by the federal government. The report, mandated by
Congress, was compiled after months of investigations by staff in
the Criminal Division of the Justice Department, along with some
assistance from the Animal and Plant Health Inspection Service of
the Department of Agriculture.
The document, released last month, was required by Congress as
part of last year's passage of the Animal Enterprise Protection
Act of 1992 (P.L. 102-346). That legislation, signed into law by
President Bush in August 1992, makes an act causing physical
disruption to the functioning of an animal-use enterprise,
resulting in property damage exceeding $10,000, a federal
offense--punishable by fine and/or imprisonment for up to one
year. Although the law's potential effectiveness was questioned
at the time of its passage (R. Kaufman, The Scientist, Oct. 26,
1992, page 1), thus far it has not been tested.
Frankie Trull, president of the Foundation for Biomedical
Research, a nonprofit group based in Washington, D.C., says she
is pleased that the federal government is finally paying
attention to animal rights terrorism.
"The reason we were anxious to have [the Animal Enterprise
Protection Act] passed in the first place was that we felt,
historically, the federal government had not given illegal
activities by animal rightists a high priority," Trull says,
"mainly because they didn't recognize that a lot of the incidents
that took place could indeed be related to other incidents.
"We were pleased with this report because it confirmed what we
had been saying all along. Now, when a break-in occurs, the
federal government can have its intelligence network in motion,
working alongside state and local police."
The Justice Department study tracks and describes the extent of
animal rights terrorism from 1977, the earliest animal rights-
related incident that the department could document, through June
30, 1993. Starting in March, Justice staffers conducted an
extensive round of interviewing, fact checking, and data
compilation that turned up 313 separate acts of property damage
against animal enterprises across the U.S. An animal enterprise
is identified by the law as any commercial or academic
undertaking that uses animals for food or fiber production,
agriculture, research, or testing.
"What we found was that the biomedical research community, the
fur industry, and the meat industry are the three principal
target areas for animal rights groups," says Scott Hendley, a
policy analyst in the Justice Department's Office of Policy and
Management Analysis, who, along with attorney Steve Weglian of
the Terrorism and Violent Crime Section, were the principal
investigators and authors of the report.
The Findings
Among the report's findings are:
* The most frequently victimized animal enterprises were
university facilities (20.1 percent of the 313 incidents) and fur
retailers (15.3 percent).
* Of the 313 total incidents, the most frequent type of
destructive animal rights activities were minor vandalism (160
acts), theft or animal release (77 acts), and personal threats
(29 acts).
* The most frequent locale for these attacks was California (143
incidents or 46 percent of the total), followed by Maryland (20
incidents), and Pennsylvania, Florida, and New York (each with 16
incidents).
* A time line of attacks in the report shows these activities
peaking from 1987 through 1989, with 142 incidents. Between 1990
and 1993, 84 incidents are documented.
Law Doesn't Apply
Hendley says that the most unusual fact he uncovered throughout
his investigation was the large number of relatively minor
incidents that would not be covered by federal law. "We were
expecting a much greater problem at the national level as it
impacted on federal interests," he says. "In fact, the vast
majority of the incidents would not be covered by federal law."
>From the total number of attacks, the study found only 21
exceeded the Animal Enterprise Protection Act's $10,000 damage
threshold; the largest was a 1987 fire at a University of
California, Davis, research lab that caused an estimated damage
of $4.5 million.
In recent years, Hendley says, property damage by animal rights
groups against research labs "has been persistent, but it seems
to have been decreasing in frequency; however, I would not say in
severity."
Perpetrators
The report identifies one group as the main instigator and
perpetrator of animal rights vandalism: the Animal Liberation
Front (ALF).
"In all, 23 different entities were documented as having claimed
responsibility for violent or disruptive acts against animal
enterprises in the United States since 1977," the report states.
"Approximately 60 percent of the total incidents documented were
claimed by ALF."
ALF is an underground animal rights group whose headquarters is
unknown and its members unidentified. From 1988 through 1990, the
FBI investigated ALF as a domestic terrorist organization. Yet,
to date, only one individual identified as a suspected ALF member
has been officially charged; a five-count indictment was handed
down against Rodney Coronado by a federal grand jury in Grand
Rapids, Mich., in relation to a February 1992 break-in and arson
at Michigan State University in East Lansing. Coronado's
whereabouts, however, currently are unknown.
"The FBI ceased investigating ALF as a domestic terrorist group
in 1990 as the frequency and severity of the vandalism appeared
to be declining," says Hendley. "And our report concluded that
the frequency seemed to peak in the late 1980s. Right now, it
seems to be waning somewhat, and, hopefully, it will continue to
do so."
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Report Cites Significant Progress Made In Wake Of Rio Earth Summit
AU : RON KAUFMAN
TY : NEWS
PG : 3
Nations around the world are making good on agreements hammered
out at last year's United Nations Conference on Environment and
Development (UNCED) in Rio de Janeiro, according to an
encouraging report issued earlier this month by the National
Resources Defense Council (NRDC), a Washington, D.C.-based
environmental watchdog group.
The report, titled "One Year After Rio: Keeping the Promises,"
points out, for example, significant progress being made in
relation to the three main documents produced at the June 1992
Rio conference, popularly known as the "Earth Summit": the
Framework Convention on Climate Change; the Convention on
Biological Diversity; and Agenda 21.
"We're really heartened by the level of activity we've seen,"
says S. Jacob Scherr, survey coordinator for the NRDC document.
"With regard to the climate change and biodiversity conventions,
the process of ratification to make the treaties legally binding
has moved forward extremely quickly."
According to the report, a total of 162 nations so far have
signed the Framework Convention on Climate Change, which commits
industrialized countries to the "return of emissions by the end
of the decade to . . . 1990 levels." The study notes that 35
signatories have ratified it; an additional 43 are expected to
ratify it by the end of this year.
Similarly successful has been the international response to the
Convention on Biological Diversity, whose ratifying countries
agree to be committed to "the conservation of biological
diversity, the sustainable use of its components and the fair and
equitable sharing of the benefits arising out of the utilization
of genetic resources." To date, 27 signatories have ratified the
treaty, and 38 are expected to follow suit by the end of this
year.
Furthermore, Agenda 21, an 800-page blueprint for "sustainable
development" that was created through discussions at Rio, has
been made part of national policy in 71 countries.
"The Summit was an extraordinary undertaking representing an
investment of what we estimate to be hundreds of millions of
dollars," the report says. "It also raised people's hopes around
the world. The real question is whether the promises made at the
Earth Summit will in fact be turned into actions."
The report, on the strength of detailed, country-by-country
analysis, concludes that "the Earth Summit represented in itself
a broader, deeper awareness of the serious environmental and
development challenges facing the global community."
Regarding the scientific com-munity's participation in the
progress shown during the past year and a half, Scherr says it
has "played an extraordinarily important role in alerting people
of the threats to the global environment. The scientific
community was in the forefront of efforts to make people aware of
what we were doing to the global atmosphere, the ozone layer, and
effects to the basic composition of the atmosphere.
"Without the scientific community, we wouldn't have been alerted
to the problems of desertification, deforestation, and the
degradation of the planet's biotic riches. And in the future,
scientists will play an important role in providing people with
both technological and sociological ways of dealing with these
problems."
Although public and scientific response to President Bill
Clinton's environmental policies have been mixed (R. Kaufman, The
Scientist, July 26, 1993, page 3), the NRDC report shows the
United States as one of the nations in the forefront of
responding to the needs identified at Rio.
The report cites the Clinton administration's commitments to
reducing greenhouse gases, establishing an energy tax, creating
the National Biological Survey, and forming the Office of
Environmental Policy and Council on Sustainable Development as
important steps to making the environmental care an important
issue.
"The impact of the Earth Summit on the government seems
positive," states the report. "The concept of sustainable
development is embraced by the highest levels of government, and
by local authorities as well."
On the international front, four post-Rio world conferences have
been scheduled:
* The Global Conference on Sustainable Development of Small
Island Developing States is scheduled to be held in Barbados from
April 25 to May 6. Based on recommendations found in Agenda 21,
the small islands conference will focus on drafting a plan to
help islands, with their unique size and geographic isolation,
deal with oceanographic and atmospheric problems.
* A U.N. Conference on Straddling Fish Stocks and Highly
Migratory Fish Stocks is slated for March and August. As was
discussed at Rio, negotiations will take place regarding disputes
over high seas fishing and efforts to promote sustainable
management of fish and marine resources worldwide.
* A U.N. Conference on Population and Development in Cairo is
scheduled for Sept. 5-13, 1994. At this meeting, discussions will
commence on ways to deal with overpopulation at a global level.
In addition, next June in Paris, negotiations will take place
among many countries affected by the problems of desertification
and land degradation.
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Bakelite In The Limelight
TY : NEWS (NOTEBOOK)
PG : 4
Though possibly an event of dubious distinction to
environmentalists and others, the American Chemical Society will
commemorate the invention of "bakelite," the world's first
plastic, with ACS's first National Historic Chemical Landmark
designation on November 9. Bakelite was the invention of Leo H.
Baekeland, a Belgian-born chemist who developed the material in
Yonkers, N.Y., 90 years ago. ACS will mark the occasion at the
Smithsonian Institution's National Museum of American History in
Washington, D.C., where the first "bakelizer," the landmark
device used to form bakelite and nicknamed "Old Faithful," is
housed. Bakelite and plastic gained in popularity in the 1930s,
when colors were introduced. Bakelite radios and even plastic
jewelry designed by such artists as Jean Schlumberger and
Salvador Dali had a heyday from the 1920s to 1940s. Today,
bakelite items may be even more popular; one collector recently
paid $10,000 for an old bakelite radio.
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Teaching Technology
TY : NEWS (NOTEBOOK)
PG : 4
The National Science Board--the National Science Foundation's
policy-making arm--will begin accepting proposals next month for
NSF's Advanced Technological Education (ATE) program. The ATE
effort aims to fund model projects for undergraduate and
secondary school curriculum development, "including the design
and implementation of new curricula, courses, laboratories, and
instructional materials, as well as teacher and faculty
enhancement," according to an NSF statement. As part of the
program, NSF will help establish up to five "centers of
excellence" to serve as national and regional models of
technological education and clearinghouses for model curricula,
instructional materials, and methods. The agency will award
planning grants to establish the centers in the first year of the
program. Two-year and four-year colleges and universities, as
well as secondary schools and industry, will be involved in the
program, says Robert Watson, director of NSF's division of
undergraduate education, who will also oversee the ATE program.
NSF expects to begin granting the ATE awards next spring.
Information on the ATE program is available on the agency's
Science and Technology Information System (STIS). For information
on STIS, contact the NSF Publications System at (202) 357-7861 or
send an E-mail message to stisinfo@nsf.gov (on internet) or
stisinfo@nsf (on bitnet).
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Space University
TY : NEWS (NOTEBOOK)
PG : 4
Applications to attend the International Space University's 1994
summer session, to be hosted by the Universitat Autonoma de
Barcelona in Spain, are now available. The 10-week ISU summer
program is designed for graduate-level students and young
professionals in space-related fields. The deadline for
applications is January 1. For information, contact the ISU
Executive Office, 955 Massachusetts Ave., Cambridge, Mass. 02139;
(617) 354-1987. Fax: (617) 354-7666.
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : High-Tech Farming
TY : NEWS (NOTEBOOK)
PG : 4
According to Purdue University agricultural scientists, farmers a
decade from now will be pushing the outer limits of modern
technology in pursuing a new type of agriculture known as site-
specific farming. In site-specific farming, conditions are
measured for growing areas as small as a few feet or even inches
square, and pesticides and fertilizers are applied accordingly--a
technique that, its pro- ponents predict, will dramatically
reduce chemical use and increase yields. To facilitate the
pinpoint accuracy needed to tend crops this way, farmers will
rely on satellites for positioning, lasers and microphones to
measure characteristics of the soil, and computers to make sense
of the enormous amount of data this technique will require. At
present, the costs to conduct this sort of farming are
prohibitive, the Purdue scientists acknowledge, but they predict
that cost-efficient technology will catch up to the methodology
in about 10 years. Despite its space-age accoutrements, the
concept is not all that new, says Purdue associate professor of
agricultural economics Howard Doster: "We're going back to what
Squanto taught John Smith about putting a seed in a fish in a
small hill of dirt."
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Recognizing Cognitive Neuroscience
TY : NEWS (NOTEBOOK)
PG : 4
The McDonnell-Pew Program in Cognitive Neuroscience, a joint
effort of the James S. McDonnell Foundation and the Pew
Charitable Trusts, is offering two sets of grants to promote the
development of cognitive neuroscience. Research grants are
intended to support collaborative, interdisciplinary
investigations by cognitive neuroscientists, such as combining
experimental data from cognitive psychology and neuroscience or
exploring the implications of neurobiological methods for the
study of higher cognitive processes. The goal of the training
grant awards is "to encourage broad participation in the
development of the field and to facilitate participation of
investigators outside the major centers of cognitive
neuroscience." Both awards are two-year, nonrenewable grants of
$30,000 per year. The application deadline for both grants is
February 1. For information, contact McDonnell-Pew Program in
Cognitive Neuroscience, Green Hall 1-N-6, Princeton University,
Princeton, N.J. 08544-1010; (609) 258-5014. Fax: (609) 258-3031.
E-mail: cns@clarity.princeton.edu.
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : The Wonders Of Glycerine
TY : NEWS (NOTEBOOK)
PG : 4
The Soap and Detergent Association (SDA) is calling for papers
for the 1994 Recognition Award for Innovative Uses of Glycerine--
a substance already having more than 1,500 known uses, including
major applications in cosmetics and toiletries, food and
beverages, over-the-counter drugs, surface coating resins, and
polymers. The competition is sponsored by SDA's glycerine and
oleochemical division to recognize innovative research,
development, and commercial use of glycerine. The winner will
receive a $1,000 honorarium and a commemorative plaque.
Submission deadline is next June 1. For information, contact the
Soap and Detergent Association, Glycerine and Oleochemical
Division, 475 Park Ave. South, New York, N.Y. 10016; (212) 725-
1262. Fax: (212) 213-0685.
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : We, The Students, Also Have A Lot To Say About U.S. Science Education
Editor's Note: The Opinion section of the April 5, 1993, edition
of The Scientist (page 11) carried an essay on the state of
science education by Bill G. Aldridge, executive director of the
National Science Teachers Association. In the essay, Aldridge
expressed his impatience with the slow progress being made in
improving science and math education in the United States;
focusing primarily on secondary education, he urged scientists to
lend their names, their expertise, and their time to the goal of
reforming a system that, in his view, is deficient in several
respects.
When Cesare Emiliani, a geology professor at the University of
Miami, read Aldridge's essay, he decided to find out what his
students--recent high school graduates--felt about the situation.
He distributed copies of the piece, and asked whether any members
of his honors class in geology would care to respond to The
Scientist's article. Six of them--ranging from first-year college
students to seniors, representing the spectrum of socioeconomic
classes, and products of secondary schools both public and
private, rural as well as urban--volunteered. "They went to
work," says Emiliani. "I did not provide guidance or suggestions.
It is the students' work."
AU : ROBERT ANDREASEN, GREG FISK, DAVID FREILICH, JOY
HOLTVLUWER, GRACE KESSLER, AND TAO SEMKO
TY : OPINION
PG : 11
The National Science Foundation, the journals dedicated to
education, and the public press have discussed over and over the
problems afflicting science education and have advanced a variety
of so-called solutions. Although innumerable articles, essays,
and position papers have been written by the experts, the
problems remain--and the students know it. We feel that it is
high time that we, the objects of debate, should be heard.
We are a group of six students enrolled in the marine science
program at the University of Miami. We come from a diverse group
of high schools, and we wish to reflect on our secondary school
experience from the vantage point of recent high school
graduates. In our opinion, secondary education is where the
problem lies, whether the symptoms manifest themselves in a lack
of preparedness for advanced science and math education or in the
humanities. No matter what field is being considered, the problem
rests in verbal skills. And this simple fact is overlooked by
even the most sensitive and well-meaning authorities in the broad
field of education.
The ideas and opinions expressed here are not only ours, but also
were drawn from undergraduate honors students at the University
of Miami--from freshmen to seniors--who represent a wide range of
geographical distribution and social types. We felt that the most
important aspect in proposing new ideas was to assemble many
different viewpoints so that the entire range of schools could
benefit, from religious, private, urban schools to rural public
schools.
Our purpose is to suggest ways to upgrade the preparedness of all
students and ready them for the competitive college environment.
We also hope, of course, that our first-hand experience through
the American educational system can provide science and math
instructors and school administrations with new ideas that will
benefit not only the students but also the nation at large.
While our main concern is with secondary education, it is
necessary to point out our dismay concerning the many problems
remaining at the primary-school level, because they have been
addressed so enthusiastically by education experts.
Unfortunately, the applied behavioral innovations meant to
increase the awareness of primary students have proved to be
ineffective. Many college students today still find themselves
having to sing their ABCs in order to alphabetize titles; while
having been taught "new math," they nevertheless find themselves
having to confess to their inability to simply multiply or divide
large numbers. Grammar and syntax have been deemphasized at the
primary level, resulting in a generation of young, bright minds
unable to express themselves effectively, in either words or
numbers.
Today, the ever-changing cultural aspects of society, the
politically emphasized breakdown of "family values," and the
general fear among people--young and old alike--of
intellectualism have all contributed to the notion that "students
aren't what they used to be." And the notion is valid; it is most
prominently manifested in high school, where the intensity of
academic, social, and biological factors all come into play at
once. The politicians of the educational system have consistently
agreed with this claim; but they have suggested no effective ways
that will lead to correcting the problems.
Of course, local situations and funding levels of schools in
different cities, counties, and states may be widely different;
we understand that. Our aim is more general: We want to change
established philosophies pertaining to high school structure and
content, rather than to suggest ways to improve funding levels,
grants, and budgets.
The most important question concerns the ways in which secondary
school administrations and faculties can get students interested
and enthusiastic about education and academics. Virtually all
students that we have talked to on our University of Miami campus
about secondary education agreed that the major problem stems
from the fact that the lecture format of most secondary school
classes almost entirely lacks integration with the content of
subjects covered in different classes. This tends to quell
potential interest or excitement that students may have felt when
they entered secondary school. The study of English and, for
example, the study of mathematics are never connected. In our
opinion, this is why almost all students that we interviewed felt
that they had graduated from high school with fundamental
weaknesses in both English and math.
One obvious solution is to downplay the lecturing in specific
subjects and to allow more group discussion and other forms of
close involvement among students and teachers. Of course, before
group discussion can be really productive, the students must have
an essential grasp of subject matter. Can textbooks help? Yes,
but not as they are currently published. They are both too
concise and too complex; at the same time, they are filled with
unnecessary details at the expense of the fundamental ideas a
student needs to prepare himself or herself for classroom
discussion. A new generation of expanded texts, focusing on
fundamentals and explaining key concepts in a number of different
ways and from different points of view, is needed. Group
discussions, an effective way to focus on a given subject, can
then follow naturally.
In the group discussion context, the teacher should be viewed
more as a general leading his or her troops in a concerted effort
toward victory--the victory being an understanding of the subject
matter. No longer would the teacher have to be a boring lecturer
droning on in front of a half-asleep class. If class sizes are
too large for open discussion, the students should be divided
into groups of five or six, each group with its own leader. Each
leader would then present the views of his or her group in open
classroom discussion, with the instructor moving among the groups
as a coordinator. In this way, all students--not just the most
outgoing--would be required to contribute.
We believe that this approach would lead not only to better
learning but also, incidentally, to a lessening of the discipline
problems that now beset nearly all secondary classes. The "focus
group" approach has worked very well in American business; it
could be applied even more effectively in our high schools, where
the diversity of the par-ticipants' backgrounds, ideas, and
knowledge is probably much greater than in the business world.
We feel that through group discussion, leading to greater
communication and coordination among students and teachers, the
fundamentals of science--physics, chemistry, geology, and
biology--could form a core to be learned by all. But they should
be learned along with the fundamentals of the humanities and
social sciences--history, geography, literature, and the arts.
Today, too many students study many subjects in many different
classes, but they have no idea how to fit them together. They
learn things, but they don't get an integrated education. And
isn't this the real aim of liberal education? With our approach
to "core" education, the students would acquire a basic
understanding of general principles in a wide variety of
subjects; and they would acquire an understanding of how the
general principles all link together. And this would prepare them
for more advanced and specialized studies better than the
way they are being prepared today.
Here are some of our other ideas:
* Math as well as English should be required in every single year
of high school. Both subjects are the two basic components upon
which the humanities and sciences rest. Also required should be
one foreign language, computer courses, and some basic courses in
economics or business.
* A number of electives should be available to the student,
according to personal inclination, that will enhance his or her
interest in the learning process. Electives may include
specialized humanities, such as English poetry; specialized
social sciences, such as psychology; specialized science studies,
such as human anatomy; or others. We believe that one class per
week should be dedicated to current events, using as a basis for
group discussion pieces from the mass media, especially
newspapers, instead of textbooks.
* We also need better teachers, in particular teachers who are
expert in their disciplines and who have a broad educational
background. These teachers should be able to lead group
discussions cutting across the various disciplines and
integrating what students learn in different classes. A teacher
should not be hired solely on the basis of a teaching
certificate and should not be promoted solely on the basis of
seniority.
* The expanded textbooks that we recommend for the students
should be accompanied by expanded manuals for the teachers. Many
rural high schools have poor or nonexistent libraries. The
student texts and the teacher manuals should contain everything
that might be needed to impart a truly first-class education to
all students, including those confined to the poorest school
districts.
* We believe that self-confidence has much to do with enthusiasm
for secondary school academics. The core approach, personal
selection of classes beyond the cores, and group discussions, all
will contribute to this building of self-confidence. Self-
confidence among the students might be enhanced if the better
students were not segregated into gifted or honors programs but
remained part of the general student population.
These suggestions are from the students' perspective, rather than
from that of educators who have long since lost contact with the
classroom.
The coauthors of this essay are enrolled in science programs at
the University of Miami in Coral Gables, Fla.
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Legacies Of Luck: Reflections On A Scientist's Scientist
AU : William Kaufmann
TY : OPINION (COMMENTARY)
PG : 12
When the news came this past August 26 that my friend and mentor
J. Murray Luck--an emeritus professor at Stanford University and
the founder of Annual Reviews--had died early that morning, some
words from a short essay, "On Libraries," by the American
novelist Wallace Stegner, came to mind. "They say that in
Africa," Stegner wrote, "when an old man dies, it is as if a
great library had burned... because in non-literate societies the
whole cultural tradition must be carried in human memories.
Literate cultures are luckier...."
Thanks to Murray Luck, we are luckier, indeed. For the enriching
impact he had on scientific literacy during his long career as
biochemist, teacher, author, and editor is bound to reverberate
in laboratories, science libraries, and classrooms around the
world for a long time to come.
Among the luckiest, of course, are the individual researchers,
teachers, and students who will continue to be the chief
beneficiaries of the concept of authoritative, critical reviews
in the sciences, which he nurtured during the past 60 years into
an immensely valuable intellectual tool in the research process.
I think the widespread and growing use of such reviews will be
the most enduring legacy of this versatile, widely accomplished,
and very wise man.
In a life spanning nearly the entire 20th century, Murray Luck--
as a student of Sir Gowland Hopkins and a contemporary at
Cambridge University of distinguished researchers such as J.B.S.
Haldane and Joseph Needham--represented a direct link with the
beginnings of modern biochemistry. Born in Paris, Ontario, on
Oct. 23, 1899, he attended the University of Toronto on a
scholarship, graduating in 1922. Another scholarship provided for
postgraduate study in England, where he was awarded his Ph.D. in
biochemistry at Cambridge in 1925. From 1926 to 1965 he was a
member of Stanford's chemistry department, where, in addition to
his research activities, he taught and inspired more than 2,500
students.
He was the author of more than 200 publications, including
several books on a wide range of topics, including malnutrition,
poverty, and the history of Switzerland. His published papers
focused primarily on biochemistry, but they also included works
on consumer cooperatives, population and environmental issues,
and numerous other education and science-related public policy
subjects.
His greatest achievement took form in 1932, when he successfully
launched the Annual Review of Biochemistry, which led to his
founding of Annual Reviews Inc., a nonprofit enterprise devoted
to the advancement of the sciences through regular publication of
critical reviews and analyses of the rapidly expanding scientific
research literature worldwide. The organization he founded now
publishes highly cited Annual Reviews in 26 fields in the
physical, biological, behavioral, and biomedical sciences. The
company's eminence today is a living tribute to Murray Luck's
unique combination of talents as scholar, teacher, and
entrepreneur, as well as to his unswerving commitment to the
highest ideals of intellectual quality and service.
In 1977, recognizing the growing importance of reviews to the
progress of science, the National Academy of Sciences
established, in Murray Luck's honor, the NAS Award for Scientific
Reviewing. Sponsored jointly by Annual Reviews Inc. and the
Institute for Scientific Information, the award pays tribute to
authors who have performed significant service to science and
their fellow research scientists in the writing of outstanding
scientific reviews--a daunting task of selection, analysis, and
synthesis of the research literature. Nominations for the NAS
award are invited from scientists, editors of scientific
publications, and others broadly acquainted with the scientific
literature.
Murray Luck himself certainly appreciated the scientist's
problems in dealing with the growing breadth and volume of
scholarly publications, and he took well-earned satisfaction in
knowing he had played a major role in helping to distill it and
make it accessible to others around the world. On the final page
of his "Confessions of a Biochemist," written as a prefatory
chapter for the 50th volume of the Annual Review of Biochemistry
(1981), he commented on his full and rewarding life as
biochemist, professor, and publisher.
"I have greatly enjoyed almost everything in which I have
engaged," he concluded, "and have had the lasting pleasure of
association with many students and others in teaching, research,
and other activities. Should one ask for more?"
William Kaufmann is editor-in-chief of Annual Reviews Inc., Palo
Alto, Calif.
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Variola Virus Sequencing
TY : OPINION (LETTERS)
PG : 12
The article on the war on AIDS in the June 28, 1993, issue of The
Scientist (R. Lewis, page 1) contains a minor, but still
significant, error. In describing AIDS vaccine strategies, the
author incorrectly states that HIV genes are being cloned into
the smallpox virus. The smallpox virus, variola virus, is not the
poxvirus currently under study as a vaccine vector. The genomes
of several strains of variola virus are being sequenced at the
Centers for Disease Control and Prevention and the Moscow
Research Institute for Viral Preparations, the only two labs in
the world that retain stocks of that deadly virus.
The sequencing is preparatory to the deliberate destruction of
all remaining stocks of smallpox virus in December of this year.
According to proponents of the destruction of the smallpox virus,
knowledge of the complete genetic code of variola virus will
answer any future scientific questions that might be raised about
variola-like viruses. Smallpox itself was eradicated from the
world in 1977.
The poxvirus under study as an AIDS vaccine vector is vaccinia
virus, a largely avirulent poxvirus of obscure origins. Vaccinia
virus is the live vaccine that provides immunity against
smallpox.
CAROL SHEPHERD MCCLAIN
Medical Anthropology Program
Epidemiology and Biostatistics
University of California
San Francisco
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Bioreactor Manufacturer
TY : OPINION (LETTERS)
PG : 12
Although your article on advanced lab bioreactors (F. Hoke, The
Scientist, July 12, 1993, page 17) was excellent, our company was
rather conspicuous by its absence. You recognized other
commercial bioreactor manufacturers, and you very prominently
featured the NASA rotary wall vessel (RWV), but you failed to
mention that Synthecon Inc. manufactures and markets the
commercial version of the RWV.
R.P. Schwarz invented this equipment in 1986 while he was a
contractor employee of the NASA Johnson Space Center
Biotechnology Program. His innovations have, as you correctly
noted, been used very successfully to establish a whole new
concept in cell culture. In recognition of his inventions,
Schwarz was selected for the 1991 NASA-wide Inventor of the Year
Award. Schwarz is now the chief engineer and a principal owner of
Synthecon Inc.
Synthecon Inc. was incorporated three years ago. NASA granted
Synthecon exclusive license to the government patents covering
Schwarz's inventions more than two years ago.
We have manufactured and sold more than 40 complete rotary cell
culture systems during the last year.
C.D. ANDERSON
President
Synthecon Inc.
Friendswood, Texas
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Animals In Research
TY : OPINION (LETTERS)
PG : 12
Charles S. Nicoll inaccurately claims that the Medical Research
Modernization Committee (MRMC) is an "antivivisection/animal
rights organization" (Letters, The Scientist, July 12, 1993, page
12). MRMC has, on many occasions, stated unequivocally that it is
not categorically against all animal experimentation and that it
has no stance on the moral status of animals. MRMC's objections
to animal research have been based on historical, scientific, and
epistemological analyses.
Unfortunately, MRMC's views, held by a large and growing number
of scientists and clinicians, are rarely represented in the
mainstream scientific literature. This permits misrepresentation.
Interested readers may contact MRMC at P.O. Box 2751, New York,
N.Y. 10163.
STEPHEN R. KAUFMAN
Medical Research
Modernization Committee
New York
WHERE TO WRITE:
Letters to the Editor
The Scientist
3501 Market Street
Philadelphia, PA 19104
Fax:(215)387-7542
E-mail:
Bitnet: garfield@aurora.cis.upenn.edu
71764.2561@compuserve.com
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TI : AIDS Research: Which Institutions Are Most Productive And
Influential?
---------
Editor's Note: Until the late 1980s, significant production of
research papers on AIDS--in terms of both volume and impact--was
achieved almost exclusively by public-sector research
institutions, such as the National Institutes of Health, and
various universities and private institutes around the world.
During the past five years, however, corporate laboratories in
the United States and elsewhere have emerged dramatically in this
field of investigation, as well. In fact, according to the
newsletter Science Watch, publication and citation data covering
the years 1988-92 places several commercial firms within the top
25 for AIDS-related publications, either in the total number of
papers they produced during that period or in the number of times
their papers were subsequently cited in reports by other
researchers. Data from the Philadelphia-based Institute for
Scientific Information (ISI), which publishes Science Watch,
reveal, for example, that only 14 institutions produced more AIDS
papers during those years than did the British pharmaceutical
giant Wellcome Plc; and in terms of citation impact, the
California biotech firm Genentech Inc. actually placed No. 1.
Following is Science Watch's report on its analysis of 1988-92
AIDS papers. Originally published in the newsletter's May 1993
issue (4[5]:1-2), it is presented here with the permission of
Science Watch and ISI.
-------
TY : RESEARCH
PG : 14
Science Watch focuses here on relatively recent AIDS-related
research papers. Early on in the epidemic, during the years 1981-
85, the field was dominated by a handful of investigators and
institutions and a cluster of discovery accounts. Naturally, the
past shapes current perceptions strongly, so Science Watch
eliminated the past, as it were, and looked at only those papers
published from 1988 through 1992, as well as how often they were
cited by the end of 1992. As much as possible, Science Watch
wanted to see AIDS research as it now is, instead of what it once
was.
To identify AIDS-related papers, a profile of 30 specific terms
and eight dedicated AIDS journals was constructed and run against
the Institute for Scientific Information's Science Indicators
Database. In all, some 24,515 papers were identified, which
collected a total of 161,961 citations by the end of 1992, for a
citations-per-paper average of 6.61. These papers were then
distributed by institutional origins, as listed in the author
addresses on the papers.
The accompanying table lists the top 25 institutions in AIDS
research, 1988-92, according to total citations (a measure of
gross influence to some degree reflecting output) and by
citations per paper (a weighted measure known as citation
impact). Only institutions that published at least 50 papers
indexed by ISI over these five years were ranked.
All the institutions listed on the impact side of the ledger
achieved at least twice the average citations-per-paper score of
the entire AIDS paper set. Seventeen institutions appear in both
columns, with the National Institute for Allergy and Infectious
Diseases, headed by Anthony S. Fauci, perhaps exhibiting the most
impressive performance--fourth in total citations and fifth in
citation impact.
Also notable in the ranking of institutions investigating AIDS
research during the 1988-92 period is the presence of several
industrial entities: Genentech Inc. (South San Francisco,
Calif.); Abbott Laboratories (North Chicago, Ill.): Merck, Sharp
& Dohme (West Point, Pa.); and Wellcome Plc (London).
In a similar ranking for the years 1981-92, no biotechnology or
pharmaceutical firm appears in rankings of the top 25, by papers,
by citations, or by citations per paper.
The private sector has, in recent years, been taking a greater
and greater leadership role in AIDS research.
Genentech, which has appeared highly ranked in other Science
Watch surveys, tops the citations-per-paper ranking. During this
brief period, Genentech fielded seven AIDS-related papers, most
on CD4 cell depletion and the HIV envelope gene and protein,
which collected 100 citations or more by the end of 1992. Only
0.5 percent of all papers tracked by ISI ever achieve that level
of recognition--and that is over their entire lifetime, not just
in the space of a few years! The four most cited Genentech papers
appear on page 14.
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : AIDS RESEARCH
TY : RESEARCH
PG : 14
INSTITUTION NUMBER OF RANK INSTITUTION CITATIONS
CITATIONS PER PAPER
National Cancer Institut 15,384 1 Genentech 28.62
University of California,
San Francisco Cancer Center 11,789 2 Dana Farber 22.90
Cancer Center
Harvard University 11,785 3 Georgetown 22.63
University
National Institute for
Allergy and Infectious
Diseases 11,288 4 Duke University 22.54
Centers for Disease Control 8,124 5 National Institute 21.54
for Allergy and
Infectious Diseases
University of California,
Los Angeles 6,218 6 Institute for Cancer
Research (London) 20.48
Duke University 5,386 7 Massachusetts General 20.13
Hospital
Veterans Administration 4,665 8 Abbott Labs 19.42
Johns Hopkins University 4,176 9 Merck, Sharp & Dohme 18.53
Dana Farber Cancer Center 4,167 10 National Institute 18.42
of Dental Research
Institut Pasteur 3,230 11 National Institute of 17.63
Neurological Disorders and Stroke
University of California, 3,112 12 Montefiore Medical Center 17.59
San Diego
San Francisco General 3,111 13 Harvard University 17.13
Hospital
New York University 2,961 14 Centers for Disease 17.00
Control
Wellcome 2,913 15 Wellcome 16.46
Columbia University 2,854 16 San Francisco 16.29
General Hospital
University of Miami 2,801 17 National Cancer 15.51
Institute
University of Amsterdam 2,660 18 University of Ca., 14.89
San Francisco
University of Ca.,Davis 2,585 19 Univ. of Ca., 14.84
Los Angeles
Massachusetts General 2,556 20 Scripps Clinic 14.78
Hospital & Research Foundation
University of Washington 2,442 21 George Washington 14.51
University
Karolinska Institute 2,240 22 University of Ca. 13.82
Davis
Genentech 2,232 23 University of Miami 13.53
Georgetown University 2,218 24 University of
Ca., San Diego 13.41
Abbott Labs 2,156 25 University of 12.97
Rochester
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : GENENTECH'S MOST CITED AIDS PAPERS, 1988-92
TY : RESEARCH
PG : 14
RANK PAPER CITATIONS
1 R.F. Siliciano, T. Lawson, C. Knall, 205
R.W. Karr, P. Berman, T. Gregory, E.L. Reinberz,
"Analysis of host virus interactions in AIDS with
anti-gp120 T-cell clones: Effect of HIV sequence
variation and a mechanism for CD4+ cell depletion,"
Cell, 54:561-75, 1988.
2 R.L. Willey, D.H. Smith, L.A. Lasky, T.S. Theodore, 201
P.L. Earl, B. Moss,D.J. Capon, M.A. Martin, "In
vitro mutagenesis identifies a region within the
envelope gene of the human immunodeficiency virus
that is critical for infectivity," Journal of Virology,
62:139-47, 1988.
3 D.J. Capon, S.M. Chamow, J. Mordenti, T. Gregory,
H. Mitsuya, R.A. Byrn, C. Lucas, F.M. Furm, J.E. 190
Groopman, S. Broder, D.H. Smith, "Designing CD4
immunoadhesions for AIDS therapy," Nature, 357:
525-31, 1989.
4 P.W. Berman, T.J. Gregory, L. Riddle, 154
G.R. Nakamura, M.A. Champe, J.P. Porter, F.M. Furm,
R.D. Hershberg, E.K. Cobb, J.W. Eichberg, "Protection
of chimpanzees from infection by HIV-1 after vaccination
with recombinant glycoprotein gp120 but not gp150,"
Nature, 345:622-5, 1990.
Source: Science Watch / Institute for Scientific Information
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : MOLECULAR BIOLOGY
TY : RESEARCH (HOT PAPERS)
PG : 15
A. Strasser, A.W. Harris, S. Cory, "bcl-2 transgene expression
inhibits T cell death and perturbs thymic self-censorship," Cell,
67:889-99, 1991.
Andreas Strasser (Molecular Biology Unit, Walter and Eliza Hall
Institute of Medical Research, Melbourne, Australia):
"Physiological cell death plays a crucial role in the generation
and function of an effective immune system. The vast majority
(more than 95 percent) of immature T lymphocytes developing in
the thymus are short-lived and die in situ, whereas most mature
peripheral T cells have a long life span.
"There are three reasons for this. Developing T cells rearrange
their antigen receptor genes by a random recombination mechanism,
express the protein products on the surface, and are then
selected on the basis of their binding specificity. Only those
thymocytes expressing a T cell receptor (TCR) that binds to self-
major histocompatibility complex (MHC) molecules are positively
selected for survival and further differentiation. Thymocytes
with nonpro- ductive TCR gene rearrangements and those bearing a
TCR that cannot bind to self-MHC molecules die because they
failed to receive a positive signal. On the other hand,
thymocytes expressing TCRs that bind with high affinity to self-
antigens presented by self-MHC molecules are actively deleted to
prevent the development of autoimmunity.
"In these three circumstances, thymocytes are thought to undergo
apoptosis. This death process can also be induced in thymocytes
by a variety of experimentally applied stress stimuli, which are
believed to mimic signals involved in physiological cell death.
"The protein encoded by the oncogene bcl-2 is the only known
inhibitor of apoptosis in mammalian cells (D.L. Vaux, et al.,
Nature, 335:440-2, 1988). Work in our laboratory and Stanley
Korsmeyer's group (published in the same issue of Cell: C.L.
Sentman, et al., Cell, 67:879-88, 1991) and in Mark Greene's
group (R.M. Siegel, et al., Proceedings of the National Academy
of Sciences, 89:7003-7, 1992) has now demonstrated that
constitutive bcl-2 transgene expression in T lymphoid cells
markedly inhibits cell death induced by cytokine deprivation or
by a variety of cytotoxic agents (for example, corticosteroids,
g-irradiation, calcium ionophores, and phorbol ester).
Interestingly, however, deletion of autoreactive thymocytes is
only delayed, but not abrogated, in bcl-2 transgenic mice.
"We believe that these data provoked interest for two reasons.
First, the finding that bcl-2 inhibits g-irradiation and
corticosteroid-induced death implicates this oncogene in a novel
mechanism of cancer therapy resistance and offers a plausible
explanation why hemopoietic tumors with high levels of Bcl-2
cannot be completely eradicated. This also suggests that the
predominant role of the oncogene bcl-2 in neoplastic
transformation is to promote extended cell survival, even during
anti-cancer therapy, thereby facilitating the accumulation of
further genetic alterations.
"Bcl-2 protein is normally undetectable in immature cortical
thymocytes, which are subject to immunological selection but
strongly expressed in mature T cells (F. Pezzella, et al.,
American Journal of Pathology, 137:225-32, 1990; D.M. Hockenbery,
et al., PNAS, 88:6961-5, 1991). Thus, the second implication of
these bcl-2 transgenic mouse studies is that bcl-2 synthesis
might normally be induced as a result of antigen receptor
engagement during positive selection.
"The finding that bcl-2 transgene expression does not abrogate
the deletion of autoreactive thymocytes demonstrates that at
least two separate apoptosis-inducing pathways must operate
during T cell development. We believe that similar mechanisms of
selection operate during B lymphopoiesis and probably also during
the development of cells of other lineages.
"We believe that the genetic approach, combining bcl-2 transgenes
with antigen receptor transgenes or mutant alleles that affect
lymphocyte survival, will soon uncover the regulatory networks of
cell death and survival."
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : CELL BIOLOGY
TY : RESEARCH (HOT PAPERS)
PG : 15
W. J. Tang, A.G. Gilman, "Type-specific regulation of adenylyl
cyclase by G protein bg subunits," Science, 254:1500-3, 1991.
Alfred G. Gilman (Department of Pharmacology, University of Texas
Southwestern Medical Center at Dallas): "The GTP-induced
dissociation of the subunits of heterotrimeric G proteins
releases two potential downstream regulators--a and bg. However,
early studies of activation of adenylyl cyclase and retinal
cyclic GMP phosphodiesterase by G proteins indicated that the a
subunits were responsible. Thus, it was not surprising when J.
Codina and associates (Science, 236:442, 1987) demonstrated
activation of K+ channels by the a subunit of Gi, but it was
considered heretical by some when D.E. Logothetis and colleagues
(Nature, 325:321, 1987) described a similar effect of bg. The
role of bg was highlighted again when genetic experiments in
yeast indicated that bg, rather than a, mediated downstream
signaling initiated by activation of the mating factor receptor.
But it was not smooth sailing for bg. The significance of the
effect of bg on K+ channels was denied by some, and the
measurement is too specialized to be made by many. The
biochemistry of the response to mating factor in yeast has yet to
be clarified, and for some, seeing is believing.
"Cloning of cDNAs encoding adenylyl cyclases led to appreciation
of multiple forms of the enzyme and reassessment of the role of
bg. Our work demonstrated that two (largely brain-specific) forms
of adenylyl cyclase are in fact regulated by bg. The type-I
enzyme is inhibited, while, most surprisingly, the type-II enzyme
is activated dramatically by bg, but only when the conventional
activator, Gsa, is also present. The characteristics of the
response suggest that the two regulators, Gsa and bg, arise from
different receptor-activated pathways. This model provides an
attractive mechanism for crosstalk between pathways, with
adenylyl cyclase as the sensor of their simultaneous activation.
"The particular significance of the paper is thus twofold. It
demonstrates novel and unsuspected regulation of adenylyl
cyclase, and it seems to have squashed some of the bg
controversy. The effect is obvious and easily reproducible.
Effects of bg are now being found in many systems, including
activation of isoforms of phospholipase C and regulation of
receptor kinases. There are surely more to come."
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Research-Scale Perfusion Systems Aid Neuroscience Studies
AU : FRANKLIN HOKE
TY : TOOLS & TECHNOLOGY
PG : 18
For many neuroscientists, the ability to accurately monitor the
substances passing into and out of a cell is central to their
studies. Investigators in such areas as ion channel function and
neurotransmitter release, for example, depend on being able to
perfuse the cell--specifically, the cell membrane--with selected
substances in measured concentrations and then to record
precisely the cell's biochemical or electrical responses. Often,
simultaneous adjustment of other aspects of the cell's
environment--of the temperature, pH, and oxygen levels, for
example--is also required.
Just a few years ago, in order to control these parameters,
researchers were forced to build customized devices with pumps,
tubing, controllers, and sensors from different manufacturers.
Many laboratories still do this, as their experimental needs
dictate. But now, a number of commercial systems also are
available to help manage this task. Each supports certain types
of research protocols, and yet provides enough flexibility to be
useful in many different neuroscience laboratories.
In many ways, what these systems share is an emphasis on membrane
biology and its broad importance in understanding cell signaling,
cell secretions, and other cellular actions. And the success of
therapeutic interventions--with pharmaceuticals, for example--
when cellular mechanisms go wrong may be tied to this
understanding.
"If you want to control what goes in and out of a building, you
don't go searching through the building," explains Robert S.
Eisenberg, an electrophysiologist and chairman of the department
of physiology at Rush Medical College in Chicago. "What you do is
you sit at the entrance. And cells are just like that. Cells have
a membrane, and everything's got to cross it, so it's a natural
place to control what goes on in cells."
Commonly, data from cell or tissue perfusion studies are
collected through scintillation counts of radioactively tagged
molecules released by the cells or through electrical recordings
of ion channel activity in the cell membrane. Ion channels are
protein structures in cell membranes that form passages to
release neurotransmitters, for example, when opened by
biochemical triggers. Traditionally, microelectrodes are used in
electrical recording of this activity. Today, however, a
technique called patch clamp recording is widely preferred
because of its great precision.
Patch clamp recording was developed by two German scientists,
Erwin Neher and Bert Sakmann, and it led to their sharing the
1991 Nobel Prize in physiology or medicine for their discoveries
concerning the function of single ion channels in cells. Unlike
previous methods, patch clamping allows researchers to completely
isolate ion channels for study.
"These channels are very important clinically and biologically,"
says Eisenberg. "They are responsible for all signaling in the
nervous system. They're responsible for the coordination of all
muscle contraction, for example, including cardiac."
Like all good ideas, Eisenberg says, the technique is simple
enough in concept.
"Patch clamp consists of taking a glass pipette, filling it with
salt solution so it carries electricity, pushing it up against
the cell, and creating suction in the pipette so that the
membrane sticks to the pipette," he says.
"Anything that crosses the membrane then has to go into the
pipette--there's nowhere else it can go--and it can then get
picked up electronically or chemically in the lumen of the
pipette."
What the commercially available perfusion systems offer
researchers, overall, is the ability to effectively control the
parameters of their investigations without having to design and
construct their own experimental apparatus. The systems often
also have greater reagent capacity than the prototype systems
that might be developed by researchers in-house.
"It would be very difficult to do these types of experiments
without this setup," says Dave Snyder, a pharmacology instructor
at the Medical College of Pennsylvania in Philadelphia. Snyder is
studying neurotransmission in the heart using a BRANDEL
Superfusion 1200 System from BRANDEL Inc. of Gaithersburg, Md. "A
number of laboratories use their own homemade systems, but it's
tough then to get the proper regulation and to get more than just
a couple of [sample] chambers made."
Collecting Fractions
Snyder's studies involve measuring the release of radioactive
norepinephrine, a neurotransmitter, from cardiac synaptosomes, or
nerve terminals, taken from rats.
"We're interested in the quality of life as you age," says
Snyder. "Part of that is maintaining good cardiac function, and
norepinephrine release controls the contraction of the heart, the
force of contraction, and your ability to respond to stress."
To assess release rates of the neurotransmitter, the researchers
first prepare a pellet of purified nerve terminals tagged with
radioactive norepinephrine. They then place small amounts of the
tagged protein in the 12 chambers of the BRANDEL system. (The
company also makes systems with six, 18, and 20 chambers.) The
system washes the sample to remove any of the norepinephrine not
bound by the terminals and then adds measured potassium pulses to
the media from multiple reagent reservoirs to stimulate the nerve
terminals to release the tagged neurotransmitter. Vials then
collect five-minute effluent fractions for scintillation counts.
"We use young rats and senescent rats," Snyder says, "and we've
found a reduction in norepinephrine release in the older rats.
Now, we're exploring the mechanisms behind that difference."
Snyder says the multichannel, multichamber system allows him to
run, in essence, 12 different experiments at the same time,
because each parameter can be controlled independently.
"One of the things we can do with the system is perfuse the
synaptosomes with different drugs," he says, "things that should
stimulate or inhibit release. And then we can measure the
response of the young and the old nerve terminals to those
drugs."
As a result of the system's flexibility and reliable control, it
is relatively easy to replicate experimental conditions. This,
too, is an important feature of the system, Snyder says.
"We have it all timed and regulated so that the drugs that we're
perfusing arrive in each chamber at the same time," he says.
"Each chamber is nearly identical in terms of the stimulation.
Also, from experiment to experiment, and day to day, variation
isn't quite as large as it might be."
Sure control also means that the chances are greater that an
experiment will run correctly the first time it is tried. In some
labs, this can mean substantial savings in both time and money.
"Some of the samples researchers put in the chambers are worth
thousands of dollars," says Brian Diaz, a BRANDEL representative.
"Brain tissue, especially, is very expensive. That's why it has
to be right the first time--if it's not, thousands of dollars can
be lost."
C. William Balke is a physiologist doing controlled perfusion of
isolated cardiac cells for patch clamp experiments and
fluorescent recordings. Balke, who has joint appointments at the
University of Maryland, Baltimore, and Johns Hopkins University
in the same city, uses the Open Perfusion Micro-Incubation System
marketed by Medical Systems Corp. of Greenvale, N.Y. (The company
also markets two other related systems, the Brain Slice Chamber
System and the Leiden Closed Perfusion Chamber.)
The microincubator is open at the top, Balke says, allowing
access to the perfused cells with microelectrodes. It also has
extremely precise temperature control, he says, and is capable of
heating and cooling, where most systems are capable only of
heating.
But, because of the extreme electrical sensitivity of the patch
clamp technique he uses, Balke also stresses the value of another
feature of the system.
"The electrical control of the system does not interject noise,"
Balke says, "which is very, very important, because we
measure currents on the picoampere scale. Excessive noise would
make the system unusable."
As useful as the system has been, Balke does hope for a
particular improvement in the next generation of the
microincubator.
"We would like to see some attention paid to laminar flow in the
bath," he says. "We have fluid coming in at one point and then
exiting at the rear. There's a great deal of turbulence, and when
we're perfusing cells or groups of cells with different
chemicals, we don't know precisely when the cells see the new
conditions. And if we had laminar flow, we would know exactly."
Patch Clamp Advances
Rush Medical's Eisenberg, with colleagues, has developed a
variation on the patch clamp technique that involves highly
controlled perfusion of the cell membrane through the pipette
itself. The commercial version of the system is called the DAD-12
Superfusion System by its manufacturer, Adams & List Associates
Ltd. of Westbury, N.Y. Company vice president Andrew Pomerantz
says the firm expects to be shipping the new product before the
Society for Neuroscience meets in Washington, D.C., in early
November. (Another perfusion-studies system also sold by the
company is the 2PK+ Pipette and Whole-Cell Perfusion Kit.)
The DAD-12 system provides a method for changing the chemical
contents of a pipette without breaking the electrically insulated
seal at the cell. This specialized perfusion tactic involves
introducing small capillaries into a positioned pipette.
Capable of computer-controlled delivery of up to 12 substances to
a cell through the capillaries, the DAD-12 system also provides a
13th capillary to remove substances from the pipette to prevent
contamination. The system allows very precise application of
substances to the cell membrane, Eisenberg says. And such
precision is crucial to the outcome of patch clamp experiments.
"Control over the material inside the pipette is a first-order
issue," Eisenberg says. "It is essential. Unless you can control
the stuff in the pipette, you don't have control over the
protein, making it very hard to study. And, of course, the name
of the game is to study the molecule and not the apparatus."
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : SUPPLIERS OF SYSTEMS AND EQUIPMENT FOR PERFUSION STUDIES
TY : TOOLS & TECHNOLOGY
PG : 19
The following companies are among those manufacturing and
distributing research-scale systems or equipment used in
neurotransmitter release and other perfusion studies.
Adams & List Associates
1100 Shames Dr.
Westbury, N.Y. 11590
(516) 997-5780
Fax: (516) 997-0528
Products: DAD-12 Superfusion System, 2PK+ Pipette and Whole-Cell
Perfusion Kit
BRANDEL Inc.
8561 Atlas Dr.
Gaithersburg, Md. 20877
(301) 948-6506
Fax: (301) 869-5570
Products: BRANDEL Superfusion 600, 1200, 1800, and 2000 Systems
Medical Systems Corp.
One Plaza Rd.
Greenvale, N.Y. 11548
(516) 621-9190
Fax: (516) 621-8503
Products: Open Perfusion Micro-Incubation System, Brain Slice
Chamber System, Leiden Closed Perfusion Chamber
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Experts Advise Job-Seekers: Try A Variety Of Techniques
AU : ROBERT FINN
TY : PROFESSION
PG : 20
Continuing economic problems throughout the United States have
severely curtailed job openings for scientists. These days it's
not at all unusual for an open faculty position to attract 600
resume, or for a young researcher to apply for 100 jobs.
Unless you're a highly sought-after superstar, looking for a
permanent position in science--whether in academia, industry, or
government--is apt to be a painful, anxiety-provoking process.
But there's no shortage of good advice on how to make your job
search more productive.
Unfortunately, however, the consensus of experts is that there's
no magic system likely to work for everyone. Sally Asmundsen,
director of the California Institute of Technology's Career
Development Center, asked 23 graduating Caltech Ph.D.'s about
their job searches in 1991 (E.R. Silverman, The Scientist, June
8, 1992, page 22). "We were hoping to come up with some fairly
concrete guidelines for future Ph.D.'s, [but] what worked for
each person ended up slightly different," says Asmundsen. "The
message is that--particularly for people looking for academic
positions--people need to do a variety of things. They need to
find out about jobs from every possible resource."
According to Asmundsen, there are few differences between a job
search in science and one in other professions--except, perhaps,
"that the scientific community is more conservative about one's
approach." Because the similarities outweigh the differences,
Asmundsen recommends that a scientist beginning a job search
consult some of the same resource materials as anyone else.
Prime among these is the popular job-hunter's guide What Color Is
Your Parachute? by Richard Bolles, published annually by
Berkeley, Calif.-based Ten Speed Press and available in most
bookstores. A main message of the book is that you have to have a
clear idea of what you're looking for before you start looking.
This message is echoed by Edward Aboufadel, who was a young
mathematician finishing a Ph.D. at Rutgers University when he
chronicled his own job hunt in a recent series of articles in
Focus, the newsletter of the Mathematics Association of America
(12:14-16, October 1992; 12:18-21, December 1992; 13:13-16, April
1993; 13:18-20, June 1993). "Before you even start the process,"
he advises, "you have to ask yourself, `Where do I want to end
up, really? Do I want to be a researcher at a place like Rutgers?
How important is teaching to me?' And once you decide that,
that'll help you decide which places to apply for."
The Mentor
Most scientists begin their job searches by looking for ads in
the most popular trade newspapers and journals. Above and beyond
this, however, the active support of one's mentor often proves
critical in opening doors. Marvin Miller, an organic chemist at
the University of Notre Dame, has helped dozens of his students
find jobs in industry, academia, and government. "Anyone who has
students who are working hard for them should work hard for the
students in return," says Miller. "Over the years I've generated
a master list--I call it my `jobs list'--of contacts I've made. I
encourage my students to write to select people on that list. I
may or may not know that there's an opening, but I ask them to
write, anyway. Sometimes you get in before the job is advertised,
so you're on the top of the pile."
That's what worked for Bill Gawne, who was in the graduate
astronomy program at the University of Oklahoma (OU) when he
decided he'd have to find a permanent position to support his
family. It was the fall of 1990, and there were indications that
the Baltimore-based Space Telescope Science Institute (STSI) was
going to need to hire a number of science operations specialists
very quickly. "We did kind of an end run," said Gawne. "We faxed
a rsum, and some of the profs at OU made some phone calls to some
of the people they knew. Some of the people at STSI had been at
OU and knew the program there. And they also personally knew the
people who were recommending me. After that, things moved quite
quickly. In a matter of slightly over a month, I was able to
start working."
The Application Package
It is unusual for a job search to proceed so informally and with
such speed. More often, job hunters will find themselves putting
together many formal application packages. Says Caltech's
Asmundsen: "We recommend that, in addition to a cover letter and
a resume, the application package include a complete bibliography;
a statement that includes both a summary of current research and
future research ideas targeted to the position; a complete list
of references, including name, title, phone number, and address;
and then, depending on the institution, a one-page document on
teaching interests."
According to Notre Dame's Miller, the research summary is key.
"It should be very short and to the point," he says. "It's
supposed to be an eye-catcher." He recommends that his students
base their summaries on structural diagrams of the chemical
problems they're investigating. "If a chemist is reading it,
that's something that catches his eye, because we all really love
chemistry. The more they can get from one glance, the better--
they're going to be screening many applications."
Miller's activism as a mentor doesn't end with keeping up his
contacts and helping his students craft their application
packages. Several days after these have been sent out, he follows
up with letters to the people doing the hiring. "It's sort of a
double-whammy effect," he says. "At least their files have to
come to the top of the pile twice within a week or so, and maybe
catch someone's eye. I try to write pretty honest letters. Not
everybody is the best thing since sliced bread, so we try to
emphasize strengths, but talk about weaknesses and how they may
be overcome."
Once the applications have been submitted, the most difficult
part of the process--the waiting--begins. Aboufadel began sending
out the first of several dozen applications in October 1991.
"Around January or so I started getting anxious, because I just
hadn't heard anything, or everything I heard was bad, so I just
started sending more out," he says. He ended up applying for 90
different positions. "The job I did get [at Southern Connecticut
State University in New Haven] was one of the early applications
I sent out. It just took them a long time to go through them."
The Interview
During this period, Aboufadel went to Baltimore to attend the
Joint Mathematics Meeting, a combined gathering of the American
Mathematical Society, the Mathematical Association of America,
and the Society for Industrial and Applied Mathematics. Like many
scientific conventions, the joint meeting has an employment
registry that matches recruiters with job candidates for brief
interviews. "When I first left Baltimore I was very excited," he
recalls. "I thought the interviews went well. But, as nothing
came of them, it began to sink in that this isn't going to be as
easy as I would like it to be."
Aboufadel says that, for him, the meeting's job fair was not an
ideal way to seek employment: "The way it's set up doesn't match
people up well enough. Another big problem is that most of the
schools that interview there tend to be the smaller, teaching-
oriented schools." Of the bigger research universities, he says,
"people tell me they don't need to go to the registry because
they get enough applications."
But those who run scientific society placement clearinghouses say
that many candidates do find jobs through such services.
Jacquelyn Roberts, who manages the American Association for the
Advancement of Science's four-year-old Employment Exchange,
maintains that the program is so successful that AAAS plans to
expand it to a year-round service that's not restricted to the
annual meetings.
Roberts says that for the Employment Exchange to be productive,
candidates need to be very specific about the kinds of jobs they
want, and they must prepare themselves for being interviewed. To
enhance candidates' job-hunting skills, AAAS has begun offering
career-development seminars at meetings in addition to the
traditional interview matchups. According to Roberts, "At the
meeting in San Francisco [Feb. 18-23, 1994], we'll offer a series
of seminars under two different topics: `Alternative Career
Paths: Science as the Basis for Non-Scientific Careers' and
`Capitalizing on One's Abilities: Moving Up the Scientific
Ladder.' "
A unique aspect of interviewing for a scientific position is that
most candidates are expected to deliver a seminar. Steven
Barwick, a particle astrophysicist at the University of
California, Irvine, recalls that when he was applying for
positions in the summer of 1989, he prepared his seminar by
starting with the short talk he'd been giving at conferences and
expanding it to include more historical and background material.
"I think what they're looking for is to find out if you can speak
well: Can you defend your arguments in front of an audience of
your peers?" he says. "I think they're trying to see if you can
bring in research contracts, and part of that skill is being able
to argue effectively that your research is interesting and
important enough to support."
On the other hand, when Aboufadel interviewed at Southern
Connecticut State, he got the impression that he was being
evaluated more for his teaching ability than for his research
interests. During his formal interview by the hiring committee,
he recalls, almost all the questions focused on his teaching
style: How did he distribute grades? Was he willing to fail
students who deserved it?
The interview is also the candidate's opportunity to ask
questions. Says Aboufadel: "I think it's really helpful for you
as an applicant to have questions about the institution. For
instance, you want to know whether or not computers are being
introduced into teaching. You want to know what kind of computing
facilities you're going to have. You want to know something about
the library.
"The people interviewing you are very interested in telling you
about themselves, which surprised me at first. And I think it's
helpful to have these questions ready, because it demonstrates
your interest. When I came here for the interview I had two pages
of questions."
Employment Sectors
Of course, not all scientific positions are in research
universities or teaching institutions. Many scientists work in
private industry or for government agencies, and looking for a
job in these sectors requires some adjustments. Employers in
industry and government tend to be much less interested in a
candidate's teaching experience, and applicants may want to de-
emphasize their teaching abilities in resumes and cover letters.
Notre Dame's Miller says that when employers from industry call
him to inquire about his students, they routinely ask the same
questions: "First, are they real good scientists? Are they going
to be able to do science but also do it in an interactive way?
The second question is, what are their communications skills? The
third question is always, can I see them as a potential manager
in X number of years?"
Many government agencies have highly bureaucratic hiring
procedures, and failure to cross every t and dot every i can
easily doom an application. And many government jobs require
elaborate qualifying examinations. Ted Smith, a senior geologist
at the California Division of Mines and Geology, notes that in
that state agency there are no fewer than 25 different job
classifications for geologists (such as "associate geologist,"
"senior oil and gas engineer," and "land and water use analyst"),
each of which has a separate qualifying exam.
Some of these exams are given only once every four years, but the
exact dates are announced only 30 days in advance, and the burden
is on the candidate to keep up with the exam schedule.
Although the test's schedule is very rigid, preparing for such an
exam is fairly straightforward. "The No. 1 thing is to look at
the exam announcement," which lists the requirements for the
position, says Smith. "Become familiar with anything that's on
there. If it's a supervisory-level position, it'll say things
like `knowledge of our department's affirmative action program.'
There the applicant needs to contact the department and get a
copy of that plan. A lot of them don't bother to do that."
But whether you're looking for a job in industry, government, or
academia, you should be prepared for a prolonged search. Says UC-
Irvine's Barwick, "I quickly scanned through the number of pages
devoted to jobs in Physics Today, and it's down by half over what
it was when I was looking four years ago."
Robert Finn is a freelance science writer based in Pasadena,
Calif.
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : RESOURCES FOR JOB-SEEKERS
TY : PROFESSION
PG : 21
Edward Aboufadel, "Job Search Diary," Focus: The Newsletter of
the Mathematics Association of America, 12:14-16, October 1992;
12:18-21, December 1992; 13:13-16, April 1993; 13:18-20, June
1993.
Richard Bolles, What Color is Your Parachute? A Manual for Job
Hunters and Career Changers (Berkeley, Calif., Ten Speed Press,
published annually).
A. Leigh Deneef, Craufurd D. Goodwin, and Ellen Sterm Mc-Crate,
The Academic's Handbook (Durham, N.C., Duke University Press,
1988).
Directory of American Research and Technology, 25th ed. (New
York, R.R. Bowker Co., 1993).
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : Penn State Astronomer Is Named Chief Scientist At NASA
AU : RON KAUFMAN
TY : PROFESSION (PEOPLE)
PG : 22
National Aeronautics and Space Administration administrator
Daniel Goldin has appointed Pennylvania State University
astrophysicist France Cordova to become the agency's chief
scientist, effective sometime this month. According to NASA,
Cordova will be the administrator's senior scientific adviser and
will serve as the principal liaison between the agency and the
national and international science community and the general
public.
Cordova, 46, who has been the head of Penn State's department of
astronomy and astrophysics since 1989, will take a temporary
leave from the school to work at NASA's Washington, D.C.,
offices.
"NASA is a civil space agency whose purpose is to explore science
and technology in space for the benefit of the whole nation,"
says Cordova. "A couple of decades ago, getting to the moon was a
mission people could easily understand. In the view of this
administrator [Goldin], many of today's NASA programs look too
exclusive and are only understood by the handful of communities
that are directly involved with them.
"He would like me to find a way to overcome that and bring what
NASA is doing to the public," she says. "Now the public is not
only the National Academy [of Sciences], AAAS [the American
Association for the Advancement of Science], or AIP [the American
Institute of Physics], but also the kids who want to become
astronauts and the people paying their taxes."
Cordova says implementing space station Freedom and creating an
overall mission for the agency are two long-term goals that her
office will work hard to achieve.
"I see one of my efforts as facilitating the development of a
science plan that is fully integrated into the overall NASA
plan," she says, "and one that helps set the tone for the
development of interagency goals in science."
C"rdova received her bachelor's degree from Stanford University
in 1969 and her Ph.D. in physics from the California Institute of
Technology in 1979. From 1979 until she joined Penn State in
1989, she was deputy group leader of the Space Astronomy and
Astrophysics Group at Los Alamos National Laboratory.
--Ron Kaufman
(The Scientist, Vol:7, #20, October 18, 1993)
(Copyright, The Scientist, Inc.)
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TI : University Of Virginia Appoints Biologist To Vice Provost
For Research Position
AU : RON KAUFMAN
TY : PROFESSION (PEOPLE)
PG : 22
Gene D. Block, a professor of biology, has been appointed to the
post of vice provost for research at the University of Virginia
in Charlottesville. Block, a researcher in biological rhythms,
began his new job September 1.
Block will continue as director of the Center for Biological
Timing at Virginia, a $10.6 million science and technology center
funded by the National Science Foundation. Researchers at the
center study the oscillating electrical signals that certain
cells produce, such as the high-frequency oscillations of the
nervous system.
"As vice provost," Block says, "the two things I will be
concentrating on are improving the information transfer to our
faculty about obtaining grants |