| 释义 |
thermoˈneutral, a.
[f. thermo- + neutral a. and n.]
1. Biol. Of an environment or its temperature: such that an organism is in thermal equilibrium without thermoregulation.
1961in Webster. 1966Respiration Physiol. I. 30 The thermoneutral skin temperature zone for fasting adult sheep has been found to be 33–35°C as determined by immersion in a water bath. 1976Nature 13 May 134/1 Neonates and infants were tested using a tight-fitting face mask with minimal dead space while the subjects were asleep in a thermoneutral condition. 1977Lancet 7 May 988/1 The incubator should if possible be kept at the lower end of the thermoneutral range.
2. Chem. Of a reaction: accompanied by neither the absorption nor the emission of heat.
1970Nature 12 Sept. 1097/1 Because the translational energies of the reactant ions are approximately thermal, these two reactions must be thermoneutral or exothermic. 1971Sci. Amer. Dec. 57/3 The first and second reactions are strongly endothermic; the third is exothermic; the fourth is essentially thermoneutral. 1977I. M. Campbell Energy & Atmosphere v. 106 It appears probable that this depends upon the attack of radicals like CH upon N2 in a near thermoneutral elementary reaction.
So ˌthermoneuˈtrality, the condition of being thermoneutral.
1881Watts Dict. Chem. VIII. 985 The term thermo-neutrality is employed..to express the fact that the quantity of heat evolved or absorbed when a salt is dissolved in water already containing equivalent quantities of other salts, is, for the most part, the same that it would be if the former salt were dissolved in pure water. 1960K. Schmidt-Nielsen Animal Physiol. iii. 43 Thus, man has a narrow range of thermoneutrality between 27°C and 31°C. 1979Nature 24 May 322/1 The abnormal thermoregulatory thermo⁓genesis quantitatively accounts for most of the metabolic efficiency of the obese animals as pair feeding at thermo⁓neutrality rather than at 23°C reduces the excess fat deposited by 65%. |