A Textbook of Sanitary And Applied Chemistry Or the Chemistry of Water Air a
A Textbook of Sanitary And Applied Chemistry Or the Chemistry of Water Air a
E H S Edgar Henry Summerfield Bailey
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Of Am. Food Materials, " Bui. 28, U. S. Dept. Agric. , Office of Exp. Stations. 814 SANITARY AND APPLIED CHEMISTRY A calorie l is the amount of heat that is required to raise the temperature of one kilogram of water from to 1 C. , or approximately the amount of heat that would be required to raise one pound of water 4 F. , and is equal to 3084 foot- pounds. The "fuel value" means the total calories obtained by the combustion of any food substance within the body. Considering the ordinary food m...aterials, the following esti- mate has been made for the average amount of heat and energy or the "fuel value" of each of the classes of nutrients : One pound of protein gives .... 1860 calories. One pound of fats gives 4220 calories. One pound of carbohydrates gives . . . 1860 calories. From this it will be seen that a pound of protein of lean meat, for instance, is about equal to a pound of sugar or starch, in yielding heat and mechanical energy, and that fats have a fuel value about two and a quarter times that of the carbo- hydrates or protein.
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