Essentials of human physiology for medical students / by D. Noël Paton.

  • Paton, Diarmid Noël, 1859-1928
Date:
1903-
Catalogue details

Licence: In copyright

Credit: Essentials of human physiology for medical students / by D. Noël Paton. Source: Wellcome Collection.

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    If the vessel is kept all night in a warm place the clear solution will in the morning be seen to be turbid. An ex- amination of a drop of the fluid shows that the turbidity is due to the presence of myriads of torulae. In a few hours the few torulie placed in the fluid have increased many hundredfold. The whole mass of yeast has grown in amount by the growth and multiplication of the individual torula3. c. Fig. 1.—(«) Foam structure of mixture of olive oil and cane sugar ; (b) Reticu- lated structure of Protoplasm ; (c) Reticulated structure of Protoplasm in cell of earth-worm {after BuTsCHU). This power of growth and reproduction under suitable conditions is one of the chief characteristics of living matter. What are the conditions necessary for the manifestation of these phenomena of life in protoplasm ? 1. If the yeast be mixed with the solid constituents of the solution in a dry state no growth or reproduction occurs. Water is essential. 2. If the yeast, mixed with the solution, be kept at the