Accession Number : AD0630303

Title :   THERMAL AND ELECTRICAL CONDUCTIVITIES OF BIOLOGICAL FLUIDS AND TISSUES.

Descriptive Note : Quarterly rept. for 1 Oct-31 Dec 65,

Corporate Author : GEOSCIENCE LTD LA JOLLA CALIF

Personal Author(s) : Poppendiek,H. F. ; Greene,N. D. ; Morehouse,P. M.

Report Date : 31 DEC 1965

Pagination or Media Count : 16

Abstract : Experimental changes in the electrical conductivity of bovine liver were determined after both slow and rapid freeze-thaw exposures. The ratio of conductivities for exposed to unexposed specimen varied from 1.2 to 2.0 after freezing to a little below 32F and slowly thawing to room temperature. The ratio of conductivities for exposed to unexposed samples was 1.04 after freezing to -320F and rapidly thawing in warm water. In the current research program, thermal and electrical conductivities both increased after freeze-thaw stressing. Cryogenic freezing and rapid thawing cause minimum changes in the conductivities for the materials studied (liver, kidney, brain, and muscle). On the basis of the present thermal and electrical conductivity research, it is felt that changes in these properties can be used as indices for biochemical and morphological changes in exposed biological specimens. (Author)

Descriptors :   (*BODY FLUIDS, ELECTRICAL CONDUCTIVITY), (*TISSUES(BIOLOGY), THERMAL CONDUCTIVITY), (*LIVER, FREEZING), KIDNEYS, BRAIN, BOVINES, MUSCLES, CRYOGENICS, BLOOD, BLOOD PLASMA, HEMOGLOBIN

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE