. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. The elements of which yeart is composed are C, H, O, N, S, P, K, Hg, and Ca; but chiefly the first four. PhyiiologioaL—If a little of the powder obtained by drying yeast at a temperature below blood-heat be added to a solution of sugar, and the lat- ter be kept warm, bubblew of carbon di- oxide will be evolved, causing the mixture to become frothy; and the fluid will acquire an a
. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. The elements of which yeart is composed are C, H, O, N, S, P, K, Hg, and Ca; but chiefly the first four. PhyiiologioaL—If a little of the powder obtained by drying yeast at a temperature below blood-heat be added to a solution of sugar, and the lat- ter be kept warm, bubblew of carbon di- oxide will be evolved, causing the mixture to become frothy; and the fluid will acquire an alcoholic charac- ter (fermentation). If the mixture be raised to the boiling- point, the process de- scribed at once ceases. Fio. 9.—VarioMitaiiiM in the derelopment of brewer's It maybe further yeaat, eeen, with the exception of the Urst in the _ .. j iu x • ii. aeries, with «i ordinary high power (ZeiM,D. 4) of notioea that in the the microscope. The flrst la greatly magnified favmanHnir aa/wlia (Gnndhuih'aAImmeriionions). Theseconfieriea »rmeilw|»g saCClMr of four represents etages In the division of a single fine solution there is a gradual increase of turbidity. All of these changes go on per- fectly well in the to- tal absence of sun- light Yeast - cells are found to grow and reproduce abundant- ly in an artificial food solution consisting of a dilute solution of Fia. 4.—Ftether development of the forms represented CCTtain Salts, together with sugar. Oonelmioai.—What are the conclusions which may be Inti- mately drawn from the above facts ? That the essential part of yeast consists of cells of about the size of mammalian blood-corpuscles, but with a limiting wall of a substance different from the inclosed contents, which latter is composed chiefly of that substance common to all living things—protoplasm; that like other cells they reproduce their cell; and the third series a branching colony. Bverywheie the light areas indicate vscaoles. Fio. S.—The cn
Size: 2498px × 1001px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1890, bookyear1890
