General physiology; an outline of the science of life . arated from that of two phenomena are entirelydistinct from one another. But in a peculiar kind of organ-isms, the so-called Anaerobia, therelations are even much less clearthan in the plants. The Anaerobiaare organisms, belonging chiefly tothe Bacteria, that can continue tolive with complete absence of of them even perish when theycome in contact with free Pasteur, the father of Bac-teriology, first asserted the realityof such rare beings, their actualexistence has frequently beendoubted, but ther
General physiology; an outline of the science of life . arated from that of two phenomena are entirelydistinct from one another. But in a peculiar kind of organ-isms, the so-called Anaerobia, therelations are even much less clearthan in the plants. The Anaerobiaare organisms, belonging chiefly tothe Bacteria, that can continue tolive with complete absence of of them even perish when theycome in contact with free Pasteur, the father of Bac-teriology, first asserted the realityof such rare beings, their actualexistence has frequently beendoubted, but there is no longer anyquestion of the correctness of this claim. Thus, , the bacteria of symptomatic anthrax and oftetanus grow anaerobically (Fig. 131). So, also, the vibrios ofcholera are able to live admirably in alkaline nutrient media withabsence of air ; under these conditions they increase rapidly in theintestine, where scarcely a trace of pure oxygen exists. This factis the more remarkable since when brought into contact with air 1 Cf. p. Fig. 131.—A. Culture of the bacteria ofsymptomatic anthrax. (After Migula.)The spherical colonies lie in the interiorof nutrient gelatine excluded from theair. B, Culture of the bacteria iftetanus. The bacteria have liquefiedthe lower part of the nutrient gelatinein the test-tube and have formed abubble of gas, which lies at the upperend of the liquefied mass. They havegrown only in the lower parts of thetest-tube, separated from the air by athick layer of gelatine. 288 GENERAL PHYSIOLOGY they show themselves to be unusually greedy for it cannot be supposed that without ox}^gen they are capableof increasing so remarkably as they do in the intestine, and sincetheir greed for free oxygen is acknowledged, it must be assumedthat they as well as other Anaerobia, such as the bacteria oftetanus and the bacilli of symptomatic anthrax, are capable in theabsence of free oxygen of withdrawing oxygen from the salts ofthe alkal
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Keywords: ., bookcentury1800, bookdecade1890, bookidgen, booksubjectphysiology
