| Estimation of rat thermoregulatory ability based on body temperature response to heat. | |
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MedLine Citation:
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PMID: 6501036 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A new simple but general estimation method for survival time in a hot environment is presented in this study. Even in heat-tolerant rats showing a triphasic heat response, an accurate estimation of survival time (ST) is possible. Rat groups, which included some heat-tolerant individuals, were exposed to 42.5 degrees C, 40% rh. Colonic temperature (Tco) was measured continuously by copper-constantan thermocouple. The ST (Y) of male and female rats were expressed as a linear function of time (X) until the Tco of 42.5 degrees C was reached: Y = 0.976X + 30.6 and Y = 0.968X + 31.6, respectively. A Tco of 42.5 degrees C at rest was just below the maximum survivable body temperature and above the steady-state equilibrium Tco levels during the second phase of the triphasic heat-response curve. Heat-tolerant individuals showed lower equilibrium temperatures than heat-intolerant rats. All 140 rats survived the Tco of 42.5 degrees C and lived for more than 8 wk, thus enabling them to be used for future experiments on thermoregulation. The heat survivors were able to reproduce, and their genetically controlled offspring could be used for thermoregulatory experiments. |
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Authors:
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F Furuyama; K Ohara; A Ota |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of applied physiology: respiratory, environmental and exercise physiology Volume: 57 ISSN: 0161-7567 ISO Abbreviation: J Appl Physiol Publication Date: 1984 Oct |
Date Detail:
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Created Date: 1984-12-26 Completed Date: 1984-12-26 Revised Date: 2009-11-19 |
Medline Journal Info:
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Nlm Unique ID: 7801242 Medline TA: J Appl Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1271-5 Citation Subset: IM |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acclimatization Animals Body Temperature Regulation* Female Hot Temperature* Male Pregnancy Rats Rats, Inbred Strains Salivation Selection, Genetic Water-Electrolyte Balance |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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