Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science . ure leucin crystallizes in thin, white hexagonal of pure leucin, obtained as a decomposition product ofthe proteid gliadin, are reproduced in Fig. 24. Impure leucinis a slightly refractive substance, which generally crystal-lizes in balls having a radial structure or in aggregations ofspherical bodies. Fig. 104, page 326. It is rather easily solublein water (46 parts), alcohol, alkalis, ammonia and acids. Onheating to 1700 C, leucin
Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science . ure leucin crystallizes in thin, white hexagonal of pure leucin, obtained as a decomposition product ofthe proteid gliadin, are reproduced in Fig. 24. Impure leucinis a slightly refractive substance, which generally crystal-lizes in balls having a radial structure or in aggregations ofspherical bodies. Fig. 104, page 326. It is rather easily solublein water (46 parts), alcohol, alkalis, ammonia and acids. Onheating to 1700 C, leucin sublimes with the formation of car-bon dioxide, ammonia and amylamine. In aqueous solutionsleucin is laevorotatory, whereas in acid or alkaline solutions itis dextrorotatory. 70 PHYSIOLOGICAL CHEMISTRY Aspartic Acid, C4H7N04.—Chemically, aspartic acid isamino-succinic acid and has the following structural formula: XH, ICH-COOH ICH2-COOH. The amide of aspartic acid, asparagin, is very widely dis-tributed in the vegetable kingdom. The crystalline form ofaspartic acid., as obtained from the proteid gluienin, is exhibited in Fig. 25. Fig. Aspaktic Acid. Glutamic Acid, C-;H0XO4.—This acid is a-amino-normal-glutaric acid and as such bears the following graphic formula: XH. ICH-COOH ICHo DECOMPOSITION PRODUCTS OF 71 Upon hydrolyzing the wheat proteid gliadin with hydrochloricacid, Osborne and Harris obtained a yield of 37 per centof glutamic acid. This is the largesl amount of an amino Fig. 26.
Size: 1581px × 1581px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherphiladelphiablakis
