United States or Suriname ? Vote for the TOP Country of the Week !
The last group consists also of nitrogenized substances, which resemble gelatine in many of their characteristics. The first two groups are called non-azotized, as they contain no nitrogen; the last two, azotized, containing nitrogen.
The putrefaction of animal and other azotized bodies is a chemical process, by which they are gradually dissipated in a gaseous form, chiefly in that of carbonic acid and ammonia; now to convert the carbon of the animal substance into carbonic acid requires oxygen, and to convert the azote into ammonia requires hydrogen, which are the elements of water.
Only after the azotized food has been somewhat disintegrated by the action of the gastric juice, and the fluids again rendered alkaline by the presence of saliva, swallowed in small quantities for a considerable time after eating, does the saccharifying process go on with normal rapidity and vigor.
Direct oxidation or combustion of the carbon and hydrogen contained in the food, or in the tissues themselves; the division of alimentary substances into respiratory, or non-azotized, and azotized, these doctrines are familiar even to the classes in our high-schools. But this simple statement is boldly questioned. Such is the well-grounded statement of Robin and Verdeil.
The division of food into azotized and non-azotized is no doubt important, but the attempt to show that the first only is plastic or nutritive, while the second is simply calorifacient, or heat-producing, fails entirely in the face of the facts revealed by the study of man in different climates, and of numerous experiments in the feeding of animals.
They relate to the sensitiveness of these tentacles, as he prefers to call them, and the mode in which it is manifested; their power of absorption; their astonishing discernment of the presence of animal or other soluble azotized matter, even in quantities so minute as to rival the spectroscope that most exquisite instrument of modern research in delicacy; and, finally, they establish the fact of a true digestion, in all essential respects similar to that of the stomach of animals.
Therefore, my friends, if any of you have uttered words of kindness, of flattery, of extreme over-praise, even, let me thank you for it. Criticism with praise in it is azotized food; it makes muscle; to expect a man to write without it is like giving nothing but hay to a roadster and expecting to get ten miles an hour out of him.
If not protected, it is presently attacked by ants, and in a short time is, as it were, converted into white crystalline sugar, the ants having refined it by removing the darker portion, probably preferring that part from it containing azotized matter.
Direct oxidation or combustion of the carbon and hydrogen contained in the food, or in the tissues themselves; the division of alimentary substances into respiratory, or non-azotized, and azotized, these doctrines are familiar even to the classes in our high-schools. But this simple statement is boldly questioned. Such is the well-grounded statement of Robin and Verdeil.
The division of food into azotized and non-azotized is no doubt important, but the attempt to show that the first only is plastic or nutritive, while the second is simply calorifacient, or heat-producing, fails entirely in the face of the facts revealed by the study of man in different climates, and of numerous experiments in the feeding of animals.
Word Of The Day