The Elements of the Science of NutritionW.B. Saunders Company, 1909 - 390 pages |
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Common terms and phrases
American Journal amino-acids amount animal Archiv für Physiologie blood burned calculated calories calories per kilogram carbohydrates carbon dioxid cause cells cent chemical regulation converted COOH creatinin cystin dextrose diabetes diet containing digestion energy excretion experiments fasting dog fatty feces fever foodstuffs gelatin given glycocoll glycogen glycosuria grams of meat grams of nitrogen grams of protein guanin heat production heat value hippuric acid hypoxanthin influence intestinal Journal of Physiology kilogram lactic acid liver Lusk Magnus-Levy meat ingestion metab meters milk mixed diet muscle nitrogen elimination nitrogen equilibrium normal olism organism output oxidation oxygen Pettenkofer and Voit Pflüger's Archiv phlorhizin physiologische Chemie protein metabolism purin purin bases quantity rabbits ratio requirement respiration retention Rubner shown specific dynamic action starch starvation substance sugar tein tion tissue urea uric acid urine weight xanthin Zeitschrift für Biologie Zeitschrift für physiologische Zuntz
Popular passages
Page 360 - However clearly formulated the laws of metabolism may be, and many of them are as fixed and definite as are any laws of physics and chemistry, still the primary cause of metabolism remains a hidden secret of the living bioplasm.
Page 211 - sick headaches " and bilious attacks, no longer appeared periodically as before. There was greater appreciation of such food as was eaten ; a keener appetite and a more acute taste seemed to be developed, with a more thorough liking for simple foods.
Page 45 - The requirement for energy cannot possibly be the cause of metabolism, any more than the requirement for gold will put it into one's pocket. Hence the production of energy has a very definite upper limit, which is afforded by the ability of the cells to metabolize. If the cells will metabolize no more, then further increase of work ceases even in the presence of direst necessity; and this is also the case with the heat production, even though it were very necessary, and we were likely to freeze....
Page 226 - Mute and still, by night and by day, labor goes on in the workshops of life. Here an animal grows, there a plant, and the wonder of it all is not the less in the smallest being than in the largest.
Page 12 - The greatest joy of those who are steeped in work and who have succeeded in finding new truths and in understanding the relations of things to each other, lies in work itself.
Page 13 - The aim of this book is to review the scientific substratum upon which rests the knowledge of nutrition both in health and disease.
Page 29 - Imagine our sensations," wrote Voit in his necrology of his old comrade Pettenkofer, "as the picture of the remarkable processes of the metabolism unrolled before our eyes, and a mass of new facts became known to us! We found that in starvation protein and fat alone were burned, that during work more fat was burned, and that less fat was consumed during rest, especially during sleep ; that the carnivorous dog could maintain himself on an exclusive protein diet, and if to such a protein diet fat were...
Page 30 - ... sugar into carbon dioxide and alcohol without the intervention of oxygen. In like manner the first products of the decomposition of fat, sugar and proteid are formed in metabolism through unknown causes. Some of these preliminary decomposition substances may unite with oxygen to form carbon dioxide and water, others may be converted into urea, while others under given circumstances may be synthesized to higher compounds. In any case the absorption of oxygen does not cause metabolism, but rather...
Page 44 - ... power" of yeast cells. The metabolism of the different food-stuffs varies with the quality and quantity of the food. Proteid alone may burn, or little proteid and much carbohydrates and fat. I have determined the amount of the metabolism of the various foodstuffs under the most varied conditions. All the functions of metabolism are derived from the processes in the cells. In a given condition of the cells, available proteid may be used exclusively, if enough be furnished them.
Page 211 - Maine at an inland fishing resort, and during a part of this time a guide was dispensed with and the boat rowed by the writer frequently six to ten miles in a forenoon, sometimes against head winds (without breakfast), and with much greater freedom from fatigue and muscular soreness than in previous years on a fuller dietary.