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Programmable temperature control system for biological materialsA system was constructed which allows programmable temperature-time control for a 5 cu cm sample volume of arbitrary biological material. The system also measures the parameters necessary for the determination of the sample volume specific heat and thermal conductivity as a function of temperature, and provides a detailed measurement of the temperature during phase change and a means of calculating the heat of the phase change. Steady-state and dynamic temperature control is obtained by supplying heat to the sample volume through resistive elements constructed as an integral part of the sample container. For cooling purposes, this container is totally immersed into a cold heat sink. Using a mixture of dry ice and alcohol at 79 C, the sample volume can be controlled from +40 to -60 C at rates from steady state to + or - 65 C/min. Steady-state temperature precision is better than 0.2 C, while the dynamic capability depends on the temperature rate of change as well as the mass of both the sample and the container.
Document ID
19820055266
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Anselmo, V. J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Harrison, R. G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Rinfret, A. P.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 10, 2013
Publication Date
August 1, 1982
Publication Information
Publication: IEEE Transactions on Biomedical Engineering
Volume: BME-29
Subject Category
Instrumentation And Photography
Accession Number
82A38801
Distribution Limits
Public
Copyright
Other

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