The American Journal of Physiology, Volumen16

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American Physiological Society, 1906
Vols. for 1898-1941, 1948-56 include the Society's proceedings (primarily abstracts of papers presented at the 10th-53rd annual meetings, and the 1948-56 fall meetings).
 

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Página 414 - Food should be ingested in just the proper amount to repair the waste of the body; to furnish it with the energy it needs for work and warmth; to maintain it in vigor; and, in the case of immature animals, to provide the proper excess for normal growth, in order to be of the most advantage to the body
Página 302 - The organic phosphorus bodies of the egesta were but little affected, if at all, by the proportions of phosphorus compounds in the food. Variations in the phosphorus supply appeared not to modify the appropriation of this element by the milk. 3. No relation whatever appears to exist between nitrogen excretion and phosphorus excretion. 4. It is shown without question that the physiological effect of the two rations, due to the withdrawal from the bran of such compounds as were soluble in slightly...
Página 268 - The metabolism and functions of the ash ingreaients of cattle foods have received relatively little attention from scientific investigators up to the present time. This is true even of so important an element as phosphorus. So far, investigators have given their attention chiefly to studies of the metabolism and functions of the compounds included in the three classes, proteids, carbohydrates and fats. There is every reason for believing, however, that some of the elements which appear in plant ash...
Página 437 - ... energy requirement. Knowing that the law of the conservation of energy obtains in the human organism, it is only necessary to know the energy output per day to determine the energy requirement. Prof. Bendict gave the result of several experiments with the respiration calorimeter. "Dietetic Experiments at Tale University,
Página 292 - MANAGEMENT OF THE EXPERIMENT. The management of this experiment was similar in all its details to that of the two former experiments, other than some differences which may have occurred in the sequence of the feeding periods. THE RATIONS. The components of the ration, outside of the bran, were oat straw, rice and wheat gluten. To these basal feeds washed bran was added in certain periods and unwashed bran in others. In the first experiment when the change was made from the washed bran to the unwashed...
Página 428 - Jou tomed to a low protein diet are fed on a higher protein plane, as is the case when the southern Italians come to America, their productive power increases markedly. Aside from the dietary studies of communities, there is a considerable amount of evidence at hand on the power of the body to subsist on low protein diet in the form of digestion experiments and dietary studies with vegetarians, fruitarians, and nutarians. Those of Albu,1 Caspari,2 Voit,3 and more recently those of Jaffa,4 are of...
Página 306 - ... of both magnesium and potassium. Our knowledge of materia medica suggests, of course, that the larger supply of magnesium compounds in ration i may have had some influence of a laxative character and it is also conceivable that the greater amount of excreted potassium compounds may have increased the flow of urine. Outside of these suggestions it is difficult to even theorize as to why the extent of the supply of these bases should explain the physiological influences that are under discussion....
Página 302 - Further evidence of catabolic metabolism of phosphorus compounds is found in the fact that the inorganic phosphates of the milk were from three to five times greater in quantity than the total amount of. such compounds in the food. The rise and fall in the amounts of outgoing phosphorus compounds occurred almost wholly with the inorganic salts found in theegesta.
Página 271 - The feces were thoroughly mixed by prolonged stirring and five pound samples of the fresh material were taken for drying and for nitrogen determinations. These samples were dried over steam coils at a temperature not exceeding 60° C. In general the analytical methods of the AOAC were followed. During some of the time the fat in the milk was estimated both by the Babcock and ether extraction methods. Neumann's method was used in all the total phosphorus determinations. For the separation of inorganic...
Página 272 - ... extraction methods. Neumann's method was used in all the total phosphorus determinations. For the separation of inorganic from organic phosphorus the method described in Bulletin No. 238 of this Station was employed. This method also gave an opportunity to estimate what we have called " fixed " phosphorus and which probably quite closely represents the phosphorus of the true nucleo-proteids and nucleins. In the urine only total phosphorus was determined, as attempts to separate inorganic from...

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