Battalion/Page 5
October 28, 1982
Murder
conviction
overturned
United Press International
AUSTIN — The Texas Court
of Criminal Appeals Wednesday
overturned the capital murder
conviction of Linda May Bur
nett, who was sentenced to death
in the 1978 slaying of a 2-year-
old Winnie boy.
Burnett earlier this month
wrote a hand-scrawled letter to a
district court judge asking that
she be allowed to die without
appealing her conviction, but;
prosecutors objected and her
defense attorneys continued
with the appeal over her objec
tion.
Ii 12 faculty memM
eight research
I have conducted
niming to
'0,000 in the pastlnj
One of the
lv proud of at Tea
we have what
> unique anthro)
t," Bryant said.In
iniqueness that has
uk h attention botli
nd international!'
exas A&M is theoi
ex as that offers
lobotany, a
conservation
leology.
A'e have tried
'ram grow by fim
other regional
iols are not stra
int said. “This is 41
e in Texas thatstuila
his material in te
Buy this diamond
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|This 2 inch cockroach, from South America, is being
•studied in the Department of Etomology under the direc-
exas A&Mwasthes tion of Dr. Keeley. By documenting the effects of diffe-
>nal institution inti™
rent chemicals on the roaches’ brain, creating new pesti
cides is no longer a hit or miss job.
nsect control researched
n the insects
physiological
offer advanced
ling in the area of
archaeology, dirffl
e of die world’
aeologists.
he anthropology
ug to receive pH by Jane North
in the next tWOOlB, Battalion Reporter
5 to 0 |f er a (lociorH exas A&M University scien-
Brvant said tisls are hoping that the neuro-
hormones that control the
•» Hwth, reproduction and phy
siological balance of insects may
•; H provide a way to control in-
. ’ h set pests without insecticides,
w I ICUllUpThe scientists are trying to
t t leain enough about neurohor-
k /-yi vs Hinfltnjnes. which are manufactured
- Hill.in*he Drains of insects, to make
jHm artificially. They hope
1 ggpdHv then could block
V Lt TOLU; n J, roS e cret i ons j
and disturb theii
aneer in the seartf'balance,
opment on Ne* HSince neurohormones are so
ilture will speal® important to the insect’s phy-
af Agriculture" FflSi(logical process, you should lie
bidder Tower, able to disturb the process and
. Richard S. MaAldolurol the insect population,”
• of the RobertSiJDi|. Larry L. Keeley, professor
dation for ArcMoflentomology, said,
ver, Mass., willdisHThe research in this area is
he conducted in Vi! theoretical since little is
outh America duwknpwn about insect neufohor-
and 1970s. mjnes, he said. Scientists do
icNeish has writwRnpw neurohormones affect
sological artidfiHod sugar balance, water ba-
and has o rfence, blood fat levels and pro-
eological field tein synthesis. About a dozen
than 30 years, neurohormones are known, but
J received hisbfcnly two have been chemically
r’s and doctoral ^characterized by finding their
he University of 1 femitto acid sequences, Keeley
g the 1940s. sa ' ( l
speech, sponsoretH'Our primary interest is to
A&M College of-fhiid out what processes are reg-
n chaeology progritdated by them and then what
tments of HiswHir structure is,” Keeley said,
aphy, will begin; Once the structure is known, in-
Imission is free, hibitors or mimics of the neuro-
hormones can be made.
Keeley is conducting the re-
Jrch on a variety of large tro
pical cockroaches from Central
America. They are better to use
at this stage in research because
they are large, easily handled,
— foundant in body tissue and
PPEIlfpve a large brain, lie said. But
—77i'™anyof the insects must be used
[because each insect produces
only several hundred billionths
ofagram of neurohormones, he
said.
| In order to study the effect of
lurohormones, they first must
■ extracted. This is done either
Jy isolating the gland in the
'P aili producing them, or by cut-
t|ig off the insect’s head and ex-
ro
tracting them with solvents.
Once extracted, the neuro
hormones are purified and in
jected into a live insect. Such
physiological effects as the blood
sugar level then are monitored
to see if they have changed since
the injection.
Neurohormones are proteins
and cannot be absorbed through
the insect’s cuticle (the horny
outer covering) as are insecti
cides. For that reason, Keeley
said he hopes to develop a man
made non-protein analog (diffe
rent from the structure of
neurohormones, but similar in
action) that mimics or inhibits
the neurohormone’s actions.
The inhibitor compound
would block the neurohormone
at the tissue where a certain phy
siological process takes place.
For example, if the inhibitor was
made to block blood sugar up
take into the cells, it would re
tard the tissues which would
then become energy-deficient,
and the insect would die.
The neurohormone mimic
would cause an opposite reac
tion. It would cause a hyper
response — an overload of the
insect’s system. If the mimic was
made to affect water secretion,
the insect would excrete large
amounts of water and would die
from dehydration.
These chemicals would be de
veloped to affect only a particu
lar type of insect, so the general
animal population would re
main unharmed.
“I am optimistic that in the
future, some practical applica
tion of these chemicals for speci
fic insects will result,” Keeley
said. “But I think we have to be
cautious until we understand
the neurohormone systems
better.“
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