. Bacteria in relation to soil fertility. Soil microbiology; Bacteriology, Agricultural. Fig. 36.—Colonies of cellulose ferments. (After McBeth.) anaerobes, but most are true aerobes. The optimum temperature lies between 26° and 33° C. They grow rapidly on solid media such as beef agar, gelatin, starch, and potato. Nineteen species liquefy gelatin. They rapidly decompose cellulose and other car- bohydrates with the production of acids, but none of the organ- isms so far studied produce a gas. Products.—Cellulose when treated with dilute acid takes up water and falls to pieces. There results fi
. Bacteria in relation to soil fertility. Soil microbiology; Bacteriology, Agricultural. Fig. 36.—Colonies of cellulose ferments. (After McBeth.) anaerobes, but most are true aerobes. The optimum temperature lies between 26° and 33° C. They grow rapidly on solid media such as beef agar, gelatin, starch, and potato. Nineteen species liquefy gelatin. They rapidly decompose cellulose and other car- bohydrates with the production of acids, but none of the organ- isms so far studied produce a gas. Products.—Cellulose when treated with dilute acid takes up water and falls to pieces. There results first the complex dex- trins, which in turn break into the sugar maltose and then into grape sugar. This when oxidized yields alcohol; hence, it is pos- sible for the chemist to change sawdust into sugar and then alco- hol. Likewise, the cellulose ferments change the woody tissues of plants into dextrins, sugar, alcohol, and finally into acids. These products, in turn, are used by other microorganisms in their metabolism. During this tearing-down process the microbe. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Greaves, Joseph Eames, 1880-; Greaves, Ethelyn O. , joint author. New York, D. Van Nostrand Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbacteriologyagricult
