CERTAIN PHASES OF NITROGENOUS METABOLISM IN BACTERIAL CULTURES
نویسندگان
چکیده
منابع مشابه
The Nitrogenous Metabolism of the Earthworm
Negligible amounts of urea were excreted by fresh’ earthworms &urnbricus terrestris) ; however, on fasting, the quantity of urea in the excreta increased.notably (1). The oral administration of arginine was followed by an increased elimination of urea. The excretion of urea was also augmented, to a lesser extent, by the ingestion of citrulline with certain other amino acids. The data presented ...
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I . The deamination, ureolytic and proteolytic activities and rates of cellulolysis and gas production in large intestinal contents have been compared with those activities and rates in rumen contents of sheep. 2. Large intestinal contents produced ammonia. The rate of ammonia production was greater in caecal contents than in faeces. Incubation of caecal contents under toluene resulted in decre...
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The extent and complexity of nitrogen metabolism in the mammalian large gut (hind-gut) varies considerably between species and is influenced by the physiological age of the animal. It is most highly developed in herbivores and omnivores whose diets, post-weaning, ensure a fairly constant supply of fermentable materials to the lower tract. The present paper reviews some of these topics, with par...
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When a strain of bacteria is streaked on a nutrient agar or gelatin medium containing a large number of its own viable cells, no growth appears even after long incubation. Eijkman (1904) and Powers and Levine (1937) suggested that this phenomenon of "staling" was due to specific, autoinhibitory substances and that it might serve as a basis for selective and differential techniques in determinat...
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^ In most laboratories in the North American Continent and in England, the older methods of Maintaining bacterial cultures by constant subculturing in suitable media have of recent years been largely superseded by the method of rapid freezing and dehydration in vacuo. As early as 1896, Martin suggested the possibility and Procedure involved in the preservation of guinea-pig complement in the dr...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1923
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.8.1.7-45.1923