tuesday, January 22,1980
daily nebraskan
page 3
Continued from page 1
The object of the theory is to understand and predict
the response of any type of detector to any type of radi
ation, Waligorski said.
A detector is anything that changes form or appearance
when exposed to radiation. Biological detectors, like
human cells, are detectors because cells die when exposed
to radiation. Physical detectors include chemical com
pounds that glow when exposed to radiation. A photo
graphic emulsion that is exposed by radiation is an
example.
. , .'.There is no conceptual difference between biological
detectors and physical detectors," Waligorski said. "It's
just that biological detectors are more complicated.".
Using track theory, Katz and Waligorski are attempting
to explain how each detector works" and how each
detector's response is related to the type of radiation, he
said.- 4
,';
Track theory important
Track theory is important in the treatment of cancer
because different , types of radiation effect cancer cells
differently.
"In treating cancer cells, you want to use a type of
radiation that will "kill-that is damage so the cell can't
reproduce-about 50 of the cancer cells. You also want
to know how far below the skin the radiation will have its
greatest killing effect," he explained.
For example, if a tumor is five inches below the skin,
radiation that kills the greatest number of cells five inches
your life
Everyone has an excuse
for not seeing their doctor
about colorectal cancer. How
ever, every year 52,000 men "
and women die of colorectal
cancer in this country alone.
Two out of three of these
people might be saved by
early detection and treatment.
Two out of three. v
So what is your excuse?
Today you have a new, simple,
practical way of providing
your doctor with a stool
specimen on which he can
perform the guaiac test. This
can detect signs of colorectal
cancer in its early stages
before symptoms appear.
While two out of three people
can be saved. Ask your doctor
about a guaiac test, and stop
excusing your life away.
American
Ccmcor Sscioiy
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after it enters the body would be the best radiation for
treatment..
Katz and Waligorski are studying heavy ion radiation
because they think it would allow precise treatment of a
tumor when combined with the predictions of track
theory.
Predictions accurate
Last fall tests were conduted by a research group at the
. Lawrence Berkeley Laboratory in Berkeley, Cal., to deter
mine the number and depth at which human kidney cells
were killed by carbon ion, neon ion, and argon ion radia
tion. Using track theory , Katz was able to accurately pre
dict the outcome of the tests, Waligorski said.
Katz based his predictions on four variables: the
radius of the kidney cell nucleus, the number of "sensitive
targets" in the nucleus, the sensitivity of those targets to
radiation, and the radius of the target. 1
Katz said the sensitivity targets correspond to genes
within the nucleus of the cell that, when damaged by
radiation, interfere with the cell's Reproduction.
'The results were excellent," Katz said. 'There was an
excellent correspondence between the theoretical predic
tions and the experimental findings."
Waligorski said that work on physical detectors also is
promising, because it may be possible to produce detec
tors that simulate biological detectors. Tests with physi
cal detectors would save time and money because tests
with biological detectors such as kidney cells are lengthy
and costly.
Smoother traffic flow
goal of major changes
Major changes in procedures are in effect to ease
traffic movement (before and after) UNL basket
ball games at the Bob Devaney Sports Center,
according to Capt. Clifton Koch of the Lincoln
Police Dept. ,
'The purpose will be to even out the flow of
traffic along major arterial streets leading to the
Sports Center to reduce the risk of bottlenecks and
tie-ups." he said. ...
Koch also said the success of the new proce
dures depends on driver behavior more than any
thing else.
Motorists are urged to promptly obey instruct
ions from officers directing traffic, he said.
'The officer is reacting to a problem ahead and
out of sight of the driver but known to the officer
through radio communication he'said .
Fans are encouraged not to park on streets,
particularly where prohibited by signs. Police will
ticket violating vehicles and will impound vehicles
which interfere with traffic, he said.
Koch urges fans to "plan" their routes from the
Sports Center, based on where they park.
Principal streets to and from the complex are
14th, 17th and 27th. Each of these streets permits
access to major arterials leading to all points in
Lincoln, to Omaha, and to western Nebraska.
Assistant Police Chief John Miller said the
department has had few problems this year with
game traffic control. The success " Miller explain
ed, 'Is because of new procedural changes, as well as
improved weather conditions."
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