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Pepsin   Listen
Pepsin  n.  (Physiol. Chem.) A proteolytic enzyme (MW 34,500) contained in the secretory glands of the stomach. In the gastric juice it is united with dilute hydrochloric acid (0.2 per cent, approximately) and the two together constitute the active portion of the digestive fluid. It degrades proteins to proteoses and peptides, and is notable for having a very low pH optimum for its activity. It is the active agent in the gastric juice of all animals. Note: As prepared from the glandular layer of pigs' or calves' stomachs it constitutes an important article of pharmacy.

Collaborative International Dictionary of English 0.48

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"Pepsin" Quotes from Famous Books

... Their dissolvent, comparable in its effects with the gastric juice of the higher animals, is, beyond a doubt, emitted through the mouth. The piston of the hooks, continually in movement, never ceases spitting it out in infinitesimal doses. Each spot touched receives a grain of some subtle pepsin, which soon suffices to make that spot run in every direction. As digesting, when all is said, merely means liquefying, it is no paradox to assert that the maggot digests its food before ...
— The Life of the Fly - With Which are Interspersed Some Chapters of Autobiography • J. Henri Fabre

... are all purgatives, with a bitter to increase appetite, and occasionally a stomachic, bound together with syrup or soap. Practically all contain aloes, and very rarely a minute quantity of a digestive ferment like pepsin. Taken occasionally as purges, most digestive pills would be useful, but none are suited to continuous use, and the price is, as a rule, out of all proportion to the primary cost, while one or ...
— Epilepsy, Hysteria, and Neurasthenia • Isaac G. Briggs

... A little pepsin added to the hot water may be of use; also in cases of acidity a few drops of white vinegar mixed with the ...
— Papers on Health • John Kirk

... her black silk bag; out of it drop crackers, an account book, a thimble, a thread-and-needle case, a bottle of pepsin tablets, etc. They all stoop to pick ...
— The Girl with the Green Eyes - A Play in Four Acts • Clyde Fitch

... nutrition. The saliva secreted by the appropriate glands in the mouth, mixing with the food, facilitates the further changes which take place in the stomach. In the stomach the food is acted on and dissolved by the gastric juice or pepsin, which is poured out by an almost infinity of minute tubes, or follicles as they are termed. When the stomach has done its work, its contents in a semi-fluid state pass into the small intestine, and mix there with the bile, ...
— The Mother's Manual of Children's Diseases • Charles West, M.D.

... voice done over. She had a Mother to keep Cases on her and do the Press Work. Also there was the Grass Widow who remembered her Husband's name but had mislaid the Address. Also the Old Boarder who was always under the influence of Pepsin. He would come down to Breakfast wearing the Hoof-Marks of a Nightmare Seventeen Hands high and holler about the Food and tell the Young Lawyer how you can't believe anything you see in the Papers. Also ...
— The Wit and Humor of America, Volume VIII (of X) • Various

... can see I ain't keepin' nothin' back. All about it, I sent my papers to the lawyer that night, and next day I bought the candy route and the hoss and waggin! All the candies, lozenges, and peppermint drops; tutti-frutti and pepsin chewin'-gum; peanut toffy and purity kisses; wholesale and retail, Calvin Parks ...
— The Wooing of Calvin Parks • Laura E. Richards

... tissues, when a general diseased condition of the bodily organs has occurred, then an agent, which is poisonous in health, may prove curative. For instance it is admitted that alcohol is a poison; that it prevents healthful assimilation, solidifies pepsin, begets a morbid appetite; that it produces intoxication, and that its habitual use destroys the body. It is, therefore, neither a hygienic nor a sanative agent, but strictly a noxious one; yet, its very distinct antiseptic properties render it valuable for remedial purposes, since these ...
— The People's Common Sense Medical Adviser in Plain English • R. V. Pierce

... have the curious power of either turning their natural digestive ferments against the surrounding tissues, or secreting new ferments for the purpose, closely resembling pepsin, and thus literally eating their way into them. So rapidly do these cells continue to breed and grow and spread resistlessly in every direction, that soon the entire gland, and next the neighboring tissues, become ...
— Preventable Diseases • Woods Hutchinson

... morrow can we remain human. Put a sound limb on crutches and you paralyze it; wear smoked glasses and your eyes become intolerant of light, or wear glasses that make the muscle of accommodation superfluous and it atrophies; take pepsin and hydrochloric acid and the stomach will become incapable of producing them; cease to chew and your teeth decay; let the newspaper prepare your mental food as the cook cuts up your physical food, and you will become incapable of thought—that ...
— Woman and Womanhood - A Search for Principles • C. W. Saleeby

... instincts has a circular character. Mental processes, subcortical processes, and physical effects are involved in such a way that each reenforces the others. The physical effect of the sleep instinct, comparable with the pepsin secretion in the food instinct, or with the hyperaemia of the sexual organs in the sexual instinct, is a change in the cortex by which the sensory and motor brain centers are put out of action. What kind of a change that is, is quite indifferent. It may be a chemical one but more probably ...
— Psychotherapy • Hugo Muensterberg

... can give you some cold buckwheat cakes and a piece of mince pie." Tramp—(frightened) "What ye say?" Woman—"Cold buckwheat cakes and mince pie." Tramp—(heroically) "Throw in a small bottle of pepsin, Madam, ...
— Science in the Kitchen. • Mrs. E. E. Kellogg

... pain following eating, and the fetid breath arising from a disordered condition of the stomach; but they resent the notion that their "heart disease" is dyspepsia, and would, in all probability, discharge the physician who recommended pepsin ...
— The Secret of a Happy Home (1896) • Marion Harland

... of its two greatest triumphs: Evelyn Longman Batchelder's glorious figure of "Lightning," and the strictly legal "three grains of pepsin" which have been a comfort to so many stricken invalids—is a mere byway compared to Fulton Street, Brooklyn, whose long bustling channel may be followed right out into the Long Island pampas. At the corner ...
— Plum Pudding - Of Divers Ingredients, Discreetly Blended & Seasoned • Christopher Morley

... secretion under excitement changes in Nature and becomes acid. So, according to Schiff, mechanical irritation excites the glands of the stomach to secrete an acid. In both this acid appears to be necessary to, but of itself insufficient for, digestion. The requisite solvent, a kind of ferment called pepsin, which acts only in the presence of the acid, is poured forth by the glands of the stomach only after they have absorbed certain soluble nutritive substances of the food; then this pepsin promptly dissolves muscle, fibrine, ...
— Darwiniana - Essays and Reviews Pertaining to Darwinism • Asa Gray

... pea soup. The food then enters the smaller intestine, at the beginning of which the juices from the pancreas are added. The pancreas is a gland which furnishes a strongly alkaline liquid neutralizing the acid of the gastric juice, so that the gastric agent, pepsin, loses its power. From this gland comes a material which can act on all kinds of food and which is by far the most important of ...
— Rural Hygiene • Henry N. Ogden

Words linked to "Pepsin" :   peptic, gastric acid, gastric juice

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