ENERGY-METABOLISM - ERRORS IN GAS-EXCHANGE CONVERSION FACTORS
ENERGY-METABOLISM - ERRORS IN GAS-EXCHANGE CONVERSION FACTORS
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DOI：
10.1086/physzool.61.6.30156159
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发表时间：
1988-11-01
期刊：
影响因子：
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通讯作者：
NAGY, KA
中科院分区：
文献类型：
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作者：
GESSAMAN, JA;NAGY, KA
当动物在CO2产生的整个测量期间禁食但被假定正在进食时，对于食草动物，估计能量代谢的误差可高达23%;该误差很小（≤ 0.01%）。3.2%），且随排尿肉食性动物日粮蛋白质含量的增加而稳定增加。当所有食草动物的呼吸商数为0.83，哺乳动物的呼吸商数为0.80-0.83，排尿酸食肉动物的呼吸商数为0.72时，将CO2产生量测量值转换为能量代谢值的误差与小误差（对于每天进食的动物）有关。耗氧量测量值到能量代谢的类似转换很小（<± 0.05）。当尿氮排泄未被测量且RQ被假定为0.8时，不考虑实际的蛋白质、脂肪和碳水化合物混合物被进食的食肉动物、杂食动物或食草动物分解代谢。如果测量呼吸商并将其用于导出能量转换因子，则在几乎所有情况下误差甚至更小（± 0.001）。排尿酸的食草动物和食肉动物为0.6%）。
When an animal fasts throughout the period of measurement of CO2 production but is presumed to be eating, the error of estimating energy metabolism can be as high as 23% for herbivores; the error is small (.ltoreq. 3.2%) for uricotelic carnivores, and it increases steadily with the protein content of the diet for ureotelic carnivores. Errors in converting CO2 production measurements to energy metabolism are associated with small errors (for animals that are eating daily) when a respiratory quotient of 0.83 for all herbivores, 0.80-0.83 for mammalian carnivores, and 0.72 for uricotelic carnivores is used. Similar conversions of oxygen consumption measurements into energy metabolism are small (< .+-. 3%) when urinary nitrogen excretion is not measured and RQ is assumed to be 0.8, regardless of the actual protein, fat, and carbohydrate mixture being catabolized by fed carnivores, omnivores, or herbivores. The error is even smaller in nearly all cases if the respiratory quotient is measured and is used to derive energy conversion factors (< .+-. 0.6% for uricotelic herbivores and carnivores).