THERMAL AND ELECTRICAL CONDUCTIVITIES OF BIOLOGICAL FLUIDS AND TISSUES.
Abstract
The thermal conductivities of unstressed samples of calf muscle, bovine fat, egg yolk, blood and PVP additive were measured. Also, the thermal conductivities of all the biological fluids and tissues studied to date were predicted using mathematical, heat conduction models which are based on the premise that all biological material is composed of three primary materials, namely, water, fat and protein. With the exception of one stratified biological species, the predicted conductivities for one of the mathematical models deviate from measured values by =3% or less. The electrical conductivity of unstressed, homogenized bovine brain was measured; the conductivity varied from about 0.004/(ohm-cm) at 27C to about 0.005/ (ohm-cm) at 45C. Also, the electrical conductivity of whole blood was calculated using the mathematical conductivity models studied previously for the prediction of thermal conductivity; blood was postulated to be composed primarily of plasma and blood cells, whose conductivity had separately been determined experimentally. The Eucken equation yielded the best predictions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1965
- Accession Number
- AD0624897
Entities
People
- H. F. Poppendiek
- J. R. Murphy
- N. D. Greene
- R. Randall
- W. A. Morton