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Am J Physiol 217: 1487-1489, 1969;
0002-9513/69 $5.00
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Light synchronization of deep-body temperature rhythms in Macaca nemestrina

Rudolf A. Hoffman 1, George P. George 1, and William F. Barrows 1

1 Project Biosatellite, Ames Research Center, National Aeronautics and Space Administration, Moffett Field, California 94035

The efficiency of low levels of illumination as biorhythm synchronizers in the subhuman primate (Macaca nemestrina) was investigated. It was demonstrated that a day illumination level of approximately 6 ft-c alternating with approximately 0.06 ft-c night illumination served as an effective rhythm synchronizer.

Key Words: biorhythm synchronizer • primates • phase shift-measuring technique • telemetry • environment • circadian rhythm

Submitted on February 27, 1969






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