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SCIENCE
Page 8
THE BATTALION
Science Briefs
Study questions
estrogen effects
CHICAGO (AP) — A new study
has found that estrogen supple
ments can reduce cholesterol in
certain cases, but it only adds to
the confusion over whether hor
mones after menopause help or
hurt women’s hearts.
The study, involving women
who already had heart disease,
found that estrogen-progestin
supplements reduced elevated
levels of a type of cholesterol that
has been linked to heart disease.
But in women with low levels of
the cholesterol to begin with, the
hormones seemed to raise the
risk of a heart attack.
The researchers said they can
not explain the findings.
Coupled with last week’s re
port from a government-funded
study of women and estrogen,
the findings add to recent evi
dence that hormone supple
ments might not be as good for
the heart as some earlier re
search suggested.
Millions of women take estro
gen supplements to ease hot
flashes and other symptoms of
menopause and to protect them
selves against osteoporosis. For
the past two decades, doctors
have also believed that estrogen
wards off heart attacks.
ing sleep and is usually accom
panied by loud snoring. The dis
order is more common in people
who are obese.
In the study, researchers mea
sured breathing pauses and
blood pressure in 6,132 men and
women 40 and older.
Those with moderate to se
vere apnea — more than 30
breathing pauses per hour —
were more than twice as likely to
have high blood pressure as
those without apnea. The risk in
creased with the severity of the
apnea, regardless of weight, age
or sex.
Frogs va
DALLAS
< T *7 r i° us illne:
Scientists fear species
/A.W t-u i4- r . j., , ,, Wednesday
(AP) — I he world s frogs, toads
and other amphibians are vanishing,
and the decline began decades before
scientists first sounded the alarm in the
1980s, according to the biggest statis
tical study of the topic.
Pesticide runoff
funding delayed
Researchers reported that overall
numbers of amphibians dropped 15
percent a year from 1960 to 1966, and
continued to decline about 2 percent a
year through 1997.
“This should put the last nail in the
coffin for anyone who doesn’t think
there are some population declines for
amphibians,” said Andrew Blaustein,
a professor of zo-
said Michael Lannoo. ap[,j^ n i chrn p, r
anatomy at the Indiana[C- Lipscor
School of Medicine. sente ncec
The study was initiaisiawyers to
Houlahan. a Ph.Dcandidate: Jot Kenda
“By and large the enJfo appear
been anecdotal. Noonehad; old was ho
titatively tried to sayisar pneumonf
global decline.” Houlaha: ’
thought the best wav tnriafir n a to ,.'
simply to pile the data up as It
Apnea linked to
blood pressure
CHICAGO (AP) — Sleep apnea,
the breathing disorder that af
fects some 12 million Americans,
may raise the risk of high blood
pressure, researchers reported
today in the Journal of the Amer
ican Medical Association.
Sleep apnea is characterized
by brief pauses in breathing dur-
TOLEDO, Ohio (AP) — A delay in
federal funding is keeping farmers
from participating in a program de
signed to block pesticides from
seeping into waterways and pre
vent soil erosion.
The state is waiting for the U.S.
Agriculture Department's share of
money so it can begin reimburs
ing farmers who plant trees or
strips of grass near streams.
The “buffer strips” would help
keep chemicals from reaching
northern Ohio’s lakes and rivers.
“We’re all ready to get this go
ing," Larry Vance, chief of the
state’s division of soil and water
conservation, said Tuesday. “It's
disappointing.”
The Conservation Reserve En
hancement Program is slated to
commit $201 million over the
next 15 years in Ohio.
The federal government’s
share would be about $11.1 mil
lion each year. The state’s share
would be $33.5 million over 10
years.
State officials say it's crucial
that this year's money be avail
able within the next few weeks so
that farmers can plant the trees
and grass before summer.
ology at Oregon
State University.
The findings,
published in
Thursday’s issue
of the journal Na
ture, were com
piled by a Univer
sity of Ottawa
researcher, using
“It's just society
doing its thing”
departure’
can get it and see what itieftpfcioh'^!l-
I loulahan gleaned stufewjQpt’g a g e
scure scientific journalsaaiRRoppp |-, a c
umveraBobation c
forthenarJp Richard:
entistssL|:eember to
phibians. J'conspiracy
mailed ikj Lipscomb,
if they kI sentenced
share. He a
more
through Fro
Internet i
of the
— Michael Lannoo
Indiana University
professor of anatomy
Internet contacts with some 200 scien
tists around the world.
Since the late 1980s. scientists have
been concerned about catastrophic de
clines in populations of frogs, toads,
salamanders and other amphibian
species, particularly in Australia, South
America, Central America and high-al
titude regions of the American West.
Because they are more vulnerable
than many other creatures, amphibians
are considered a "canary in the coal
mine” for environmental damage.
Scientists have yet to zero in the
causes but suspect a combination of fac
tors: loss of wetlands to development;
use of fertilizers and pesticides; in
creased ultraviolet light from an ozone
layer thinned by industrial pollutants;
and the introduction of exotic predators.
“It’s just society doing its thing.”
Amphibian Population last
the World Conservation
Species Survival Commissio:
Data on 936 populations!
phibians and 157 speciescaiK:
37 countries and eight regie’-
world. "We could not have®
without the Internet,"Houlafc)
Trends varied by timeandy
Western Europe, a sharp declj
early 1960s leveled off later. I;!
America, the decline was si
steady. There was not enotigk
fully analyze trends in
Africa and Australia.
Houlahan acknowledged
phibians traditionally have
through periodic booms toov
regular population declines, Bui
the analyses found overall
booms are not overcoming the
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Make your
summer counl
Toward your
GFA.
(Get those required courses out of the way.)
Summer I classes begin June 5; Summer II starts July 13.
And the credits are a snap to transfer.
T81/-COLLEGE www.dcccd.edu
DALLAS COMMUNITY COLLEGES
3 ctiUnav\
on
si *66
C-HStOHi
hSanbwic
sc 7)
Tine, in fi
lunch
or dinner
'Private
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room
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