Influence of Chlortetracycline on in Vitro Cellulose Digestion by Bovine Rumen Microorganisms
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چکیده
منابع مشابه
Nutritional interdependence among rumen bacteria during cellulose digestion in vitro.
A study has been made of the promoting effect of starch on cellulose digestion by mixed rumen bacteria in a cellulose-urea medium. Starch supplementation of the medium promoted the growth of bacteria that required neither amino acids (AA) nor branched-chain fatty acids (BrFA). The growth of these bacteria was followed by the growth of AA-dependent bacteria, AA- or BrFA-dependent bacteria, BrFA-...
متن کاملInfluence of rumen protozoa and bacteria upon cellulose digestion in vitro.
S TUDIES by Appleby et al. (1956), Gutierrez and tlungate (1957), Eadie et al. (1959) and Eadie and Hollson (1962) indicated that ciliate protozoa normally inhabiting the rumen exerted considerable influence upon end products of rumen fermentation and upon tureen bacterial populations. The full significance of protozoa to the nutrition of cattle and sheep is not clear. However, Christiansen et ...
متن کاملEffect of cellulose fine structure on kinetics of its digestion by mixed ruminal microorganisms in vitro.
The digestion kinetics of a variety of pure celluloses were examined by using an in vitro assay employing mixed ruminal microflora and a modified detergent extraction procedure to recover residual cellulose. Digestion of all of the celluloses was described by a discontinuous first-order rate equation to yield digestion rate constants and discrete lag times. These kinetic parameters were compare...
متن کاملInitial pH as a determinant of cellulose digestion rate by mixed ruminal microorganisms in vitro.
In vitro fermentations of pure cellulose by mixed ruminal microorganisms were conducted under conditions in which pH declined within ranges similar to those observed in the rumen. At low cellulose concentrations (12.5 g/L), the first-order rate constants (k) of cellulose disappearance were successively lower at initial pH values of 6.86, 6.56, and 6.02, but in each case the value of k was maint...
متن کاملCellulose digestion by rumen microorganisms as influenced by cereal grains and protein-rich feeds commonly fed to cattle using an artificial rumen.
N UMEROUS communications from this laboratory, Burroughs et al. (I949a, I949b, I949c, I95oa, I9~ob, and I9~oc) have called attention to the influence of nutrients needed by rumen microorganisms in the digestion of roughages, particularly the cellulose fraction. Hungate (I9~o), after extensively reviewing the literature pertaining to rumen cellulose digesting bacteria, concluded that: "Further i...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1956
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(56)94749-x