. Biology of deserts : the proceedings of a symposium on the biology of hot and cold deserts organized by the Institute of Biology. Deserts. mg HJOy Av liter air White rats; Total water intake and total water output at various atmospheric humidities at 25°C. Ordinate: Water intake and output in grams per 100 kilocalories of pearled barley metabolized. Abscissa: Humidity in the environmental air. The point of intersection for the two curves should not be taken too seriously in this graph because of inaccuracies in determining the evaporation at higher humidities. The lowest curve shows the evap
. Biology of deserts : the proceedings of a symposium on the biology of hot and cold deserts organized by the Institute of Biology. Deserts. mg HJOy Av liter air White rats; Total water intake and total water output at various atmospheric humidities at 25°C. Ordinate: Water intake and output in grams per 100 kilocalories of pearled barley metabolized. Abscissa: Humidity in the environmental air. The point of intersection for the two curves should not be taken too seriously in this graph because of inaccuracies in determining the evaporation at higher humidities. The lowest curve shows the evaporation from the animal. The evaporation at zero humidity is calculated on basis of the determination of evaporation in dry air. From Table 2 it is seen that ml of oxygen is used per lOOkcal of barley. Then the evaporation must be HjO. The evaporation decreases with increasing water vapour content in the inspired air as shown by the sloping curve. The mini- mum water loss through the urine is superimposed on the curve for evaporation. It is calculated in the following way: Pearled barley contains g protein per 100 kcalr which, when metabolized gives g urea. The maximum concentration of urea that kangaroo rats can excrete is somewhat above 20%. The minimum amount of water required for the renal excretion of g urea is therefore The water 180. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cloudsley-Thompson, J. L. London : Institute of Biology ; New York : Hafner
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectdeserts
