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探讨了微波辐射的致热生物效应,研究了微波辐射与人体热调节的关系,建立了考虑微波辐射致热效应的人体热调节系统模型。采用数值模拟方法能方便地定量分析微波辐射的致热生物效应。 相似文献
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浙江舟山北草蜥的野外活动体温及体温调节 总被引:5,自引:0,他引:5
在自然条件下测定浙江舟山北草蜥的夏季活动体温和环境温度,在实验室条件下测定其生理体温调节能力和喜好体温,旨在揭示北草蜥的体温调节机制.结果表明野外北草蜥的活动体温显著高于空气温度和基质温度;尽管环境温度存在显著日变异,但活动体温相对恒定.实验室恒温箱内测定的北草蜥体温与环境温度接近在20~30℃范围内,体温与环境温度基本一致;而当环境温度超过该范围,体温与环境温度存在差异,且这种差异随温度的升高或降低而增大.北草蜥的喜好体温平均为30.7℃.以上结果说明,北草蜥生理调温能力较弱,行为热调节是其体温调节的主要方式.图1表1参15 相似文献
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Agnieszka Kurczewska Jacek Leśnikowski 《International journal of occupational safety and ergonomics》2013,19(1):77-87
This paper presents the concept of active variable thermoinsulation clothing for users working in low temperatures. Those garments contain heating inserts regulated by a microprocessor temperature controller. This paper also presents the results of tests carried out on the newly designed garments. 相似文献
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The interrelations of body weight, energy metabolism, and physiological parameters in the early postnatal development of reindeer are analyzed. It is shown that the dependence of energy expenditure at rest and oxygen utilization coefficient on body weight is described by a parabolic equation of the second order. At high ambient temperatures during the summer season, energy metabolism in the young decreases, heat emission by respiration increases, and the temperature homeostasis is disturbed. 相似文献
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Ashley G.B. Willmott Alex Bliss William H. Simpson Steve M. Tocker Rowland Cottingham Neil S. Maxwell 《International journal of occupational safety and ergonomics》2018,24(1):118-128
Introduction. Cooling of the body is used to treat hyperthermic individuals with heatstroke or to depress core temperature below normal for neuroprotection. A novel, chemically activated, unpowered cooling device, CAERvest®, was investigated for safety and efficacy. Methods. Eight healthy male participants (body mass 79.9?±?1.9?kg and body fat percentage 16.1?±?3.8%) visited the laboratory (20 °C, 40% relative humidity) on four occasions. Following 30-min rest, physiological and perceptual measures were recorded. Participants were then fitted with the CAERvest® proof of concept (PoC) or prototype 1 (P1), 2 (P2) or 3 (P3) for 60 min. Temperature, cardiovascular and perceptual measures were recorded every 5 min. After cooling, the CAERvest® was removed and the torso checked for cold-related injuries. Results. Temperature measures significantly (p?0.05) reduced pre to post in all trials. Larger reductions in core and skin temperatures were observed for PoC (?0.36?±?0.18 and ?1.55?±?0.97 °C) and P3 (?0.36?±?0.22 and ?2.47?±?0.82 °C), compared with P1 and P2. No signs of cold-related injury were observed at any stage. Conclusion. This study demonstrates that the CAERvest® is an effective device for reducing body temperature in healthy normothermic individuals without presence of cold injury. Further research in healthy and clinical populations is warranted. 相似文献
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This study evaluated the effects of time of day, ambient temperature, and relative humidity on mother-infant interactions
in captive Japanese macaques (Macaca fuscata). Unlike time of day and relative humidity, temperature influenced mother-infant interactions. Even though total time spent
in ventroventral contact did not change, lower temperatures were associated with greater attempts by the infants to maintain
contact with their mothers and with more frequent maternal rejection. Effects of temperature on mother-infant interactions
were not mediated by the effects of temperature on mothers' general activity. These results are interpreted in light of the
different thermoregulatory needs of mothers and infants, and highlight a previously neglected cause for mother-infant conflict.
Received: 23 June 1997 / Accepted after revision: 28 March 1998 相似文献
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Body Heat Balance of a Man with Deficient Sweat Rate Subjected to Physical Work in a Hot Environment
Krzysztof Sołtyński Maria Konarska 《International journal of occupational safety and ergonomics》2013,19(3):335-345
The dynamics of physiological stress and thermal balance were investigated in men subjected to endogenous and exogenous heat loads. The study was conducted using the thermometric method. Substantial differences in the dynamics of the tested parameters and their quantitative characteristics were observed in 1 out of 8 participants. In this article, the observed differences are rationalized in terms of the deficient sweat rate mechanism. It is pointed out that it is indispensable to address these cases in work safety regulations. 相似文献
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