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veterinary bacteriology a treatise on the bacteria yeasts molds and protozoa

by robert earle buchanan

Professional & Technical » Professional Science » Biological Sciences » Biology » Microbiology

Added by: V. N. Dvornyc...

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Originally published in 1916. This volume from the Cornell University Library's print collections was scanned on an APT BookScan and converted to JPG 2000 format by Kirtas Technologies. All titles scanned cover to cover and pages may include marks, notations and other marginalia present in the original volume.

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...withdraws from the cell wall and the cell is said to be plasmolyzed. After a time the cell may readjust the amount of solutes in the cell sap and regain its turgor. For every cell, however, there is a limit beyond which the organism cannot go. Some yeast cells have been found to develop slowly in a solution cbntaining 35 per cent, of cane- sugar. A solution of this concentration exerts a pressure of more than 350 pounds per square inch. It is apparent that such a cell must be profoundly modified. The fact that concentration of solutes inhibits the growth of microorganisms is utilized in the preservation of many food stuffs. Such foods as syrups, jellies, and candied fruits are preserved by the high osmotic 56 VETERINARY BACTERIOLOGY pressure of the solutes. The action of sugars, salts, etc. , is in the nature of a physical antiseptic. Physiological salt solution is one having the same concentration of salt as do the body cells of the particular organism to be studied. It usually...