Download Applied Dairy Microbiology (Fos Food Science and Technology) by Elmer H. Marth PDF

By Elmer H. Marth

This completely revised and up to date reference presents complete insurance of the newest advancements and clinical advances in dairy microbiology—emphasizing probiotics, fermented dairy items, affliction prevention, and public wellbeing and fitness and regulatory keep watch over criteria for dairy meals. Containing greater than 2350 bibliographic citations, tables, drawings and photographs—550 greater than the former edition—Applied Dairy Microbiology, moment variation is a useful reference for all meals and dairy microbiologists, scientists, and technologists; toxicologists; foodstuff processors; sanitarians; dietitians; epidemiologists; bacteriologists; public wellbeing and fitness and regulatory group of workers; and veterinarians; and a big textual content for upper-level undergraduate, graduate, and continuing-education scholars in those disciplines. ·        

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For example, increased growth rate on sugars in some species is accompanied by a shift in fermentation products from acetate to lactate and a reduced ATP yield (because conversion of pyruvate to acetate results in formation of one unit of ATP, whereas the conversion of pyruvate to lactate does not) (see Fig. 5). In this instance, the organisms have increased growth rate by selecting a pathway with an inherently high substrate flux (rate of substrate consumed per unit time) at the sacrifice of some ATP yield.

This compound, an isomer of the tricarboxylic acid cycle intermediate cis-aconitate, represents up to 7% of the dry weight of some grasses. Although it is itself a potent chelator of Mg2ϩ in vitro, TAA is also reduced by some ruminal microbes (particularly S. ruminantium) to tricarballylate. This compound is readily absorbed into the bloodstream and acts as both a strong chelator of Mg2ϩ and as a structural analog of citrate that inhibits the enzymatic conversion of citrate to isocitrate, a key reaction sequence of the oxidative tricarboxylic acid (TCA) cycle (Fig.

10 hϪ1 higher than those of any cellulolytic microbes that grow at a similar temperature in nonruminal habitats (Weimer, 1996). These relatively rapid rates of cellulose digestion derive in part from the ability of these species to attach directly to the cellulosic substrate (Fig. , 1987). The cell-associated cellulolytic enzymes are apparently organized into supramolecular complexes resembling the cellulosome, an organ- Microbiology of the Dairy Animal 21 Figure 7 Stereo-optic view of the adherence of the ruminal cellulolytic bacterium Fibrobacter succinogenes onto a particle of cellulose.

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