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1993-04-23
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OFFICE OF PUBLIC INFORMATION
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIFORNIA. TELEPHONE 354-5011
FOR IMMEDIATE RELEASE: April 14,
1977
One of the three experiments in Viking Lander 1's
biology
instrument has developed a leak that will end its operation.
The instrument's gas-exchange experiment -- that
looks
for signs of respiration or breathing -- apparently failed to
seal tightly during its final cycle, while analyzing soil
from
the bottnm of a deep trench at the Chryse Planitia landing
site.
The final gas-exchange experiment began April 3.
Scientists at Jet Propulsion Laboratory first detected the
problem several days ago, and have now determined that the
experi-
ment is inoperable.
Meanwhile a soil sample is being incubated in the
biology
labeled release experiment ahoard Lander 1. That experiment
measures metabolism by the release of radioactive carbon from
a
simple nutrient supplied to the soil sample.
The biology instrument aboard Viking Lander 2
continues
to function and will begin its final soil tests about April
21. î
Viking Lander 1 touched down on the Martian surface
last July 20. Lander 2 set down last Sept. 3. Viking is
managed
for NASA by Langley Research Center, Hampton, Va. It is
controlled
at Jet Propulsion Laboratory.
815-DB-4/l4/77