The book Agricultural And Industrial Bacteriology was written by author Robert Earle Buchanan Here you can read free online of Agricultural And Industrial Bacteriology book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Agricultural And Industrial Bacteriology a good or bad book?
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For every organism there exists that concentra- tion of hydrogen ions in the medium which is most favorable for development, that is, the optimum; likewise a maximum concentration beyond which it cannot grow; and a minimum concentration, that is, a concentration of hydroxyl ions likewise in which it cannot develop. The growth limits vary widely with 'different species. Most species of bacteria prefer to grow in hydrogen ion concen- trations represented by the P H values 7 to 8. Yeasts and certa...in species of molds prefer solutions which are some- what more acid. It has been found by laboratory tests that 134 AGRICULTURAL AND INDUSTRIAL BACTERIOLOGY moderate changes in hydrogen ion concentration do not markedly change the rate at which bacteria grow except near the limits. Practically the optimum is a relatively wide range. It has previously been emphasized that in the preparation of certain types of media great care is neces- sary to insure the correct hydrogen ion concentration; otherwise growth will not occur.
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