| 单词 | ptyalin |
| 例句 | Such is the agency of ptyalin in the saliva, of pepsin in the gastric juice, and of pancreatin or trypsin in the secretion of the pancreas, in the processes of digestion. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z Thus, while the mother feeds her child upon a diet which it is not yet prepared to deal with, she supplies from her own mouth the necessary moisture, warmth and ptyalin for making it digestible. The Fijians A Study of the Decay of Custom 2011-12-30T03:00:25.917Z This important function is due to an organic ingredient of the saliva called ptyalin. A Treatise on Physiology and Hygiene For Educational Institutions and General Readers Saliva, the characteristic secretion of this region, contains the enzyme ptyalin which exerts its influence upon the starches and dextrins. Dietetics for Nurses The saliva contains ptyalin, a ferment converting starch into sugar, and it also serves to moisten the food as it is ground up by the cheek teeth. Text Book of Biology, Part 1: Vertebrata In the second instance the same kind of food is so thoroughly mixed with the ptyalin in the saliva that whatever is eaten becomes of value as protein or fat or some other food element. How to Eat A Cure for "Nerves" The saliva is rich in ptyalin, which does not act upon proteids or fats, and is therefore not secreted in any appreciable quantity during the first year of infant life. The Fijians A Study of the Decay of Custom 2011-12-30T03:00:25.917Z This enables the ptyalin of the saliva to continue its action for a longer time than if the starch were eaten first. Physiology and Hygiene for Secondary Schools The action of ptyalin, however, continues in the fundus of the stomach until stopped by the acid in the gastric juice. Dietetics for Nurses By finely dividing the food, it ensures its intimate contact with the digestive ferment, ptyalin. Text Book of Biology, Part 1: Vertebrata It is alkaline and contains a ferment called ptyalin. The Chemistry of Food and Nutrition We are not certain that nicotin ruins ptyalin; we are certain that the functions of other organs are vicarious of those of the salivary glands. The Atlantic Monthly, Volume 06, No. 34, August, 1860 This is due to the presence of the hydrochloric acid, the ptyalin being unable to act in an acid medium. Physiology and Hygiene for Secondary Schools A similar action takes place in the mouth as the result of the ptyalin in the salivary juices and in the intestines from the action of the starch-splitting enzyme, amylopsin, in the pancreatic juice. Dietetics for Nurses Thus, diastase of malt, ptyalin of saliva, and boiling dilute sulphuric acid all convert starch by hydration into dextrin and sugar. The Gutenberg Webster's Unabridged Dictionary Section F, G and H Amylopsin is much more powerful and rapid than the ptyalin of the saliva, especially on uncooked starch. The Chemistry of Food and Nutrition The saliva owes its peculiarity to one of its components, called ptyalin. The Atlantic Monthly, Volume 06, No. 34, August, 1860 This action is due to the amylopsin,61 which is similar to ptyalin but is more vigorous. Physiology and Hygiene for Secondary Schools In the saliva is the ptyalin, which begins to digest the starch. Maintaining Health Formerly Health and Efficiency Its principal element, besides water, is a ferment called ptyalin, which has the remarkable property of being able to change starch into a form of cane-sugar, known as maltose. A Practical Physiology The diastase of the malt has the same action on starch as the ptyalin in the saliva. The Chemistry of Food and Nutrition Though many azotized substances in a state of decomposition exert a similar agency, yet it is possessed by ptyalin in a much greater degree. The Atlantic Monthly, Volume 06, No. 34, August, 1860 The action of the ptyalin commences with great promptness, and sugar has been detected, it is said, within half a minute after the starch was placed in the mouth. Hygienic Physiology : with Special Reference to the Use of Alcoholic Drinks and Narcotics The saliva, which contains ptyalin, is secreted in the mouth. Maintaining Health Formerly Health and Efficiency This is done by the ferment ptyalin contained in saliva. A Practical Physiology The ptyalin starts starch digestion, but it does not work in the presence of acid. Maintaining Health Formerly Health and Efficiency |
| 随便看 |
|
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。