Microorganisms beef products

As for the cultivation of other types of marine microorganisms, e.g., those with a specific potential for the production of biologically active metabolites, predominantly small-scale experiments (shake flasks) have been described. Alternatively, artificial seawater or 25 50 75 90% natural seawater has served as a basis for nutrient media. The concentrations of carbon and nitrogen sources reached up to 2 % (w/w) starch, glucose, molasses, glycerol, soybean oil, yeast extract, malt extract, beef extract, peptone, cornsteep liquor and NZ-amine. In the absence of artificial or natural seawater, high concentrations of... 

In view of the encouraging results obtained by feeding alder sawdust to beef cattle, as was reported earlier, it seemed worthwhile to develop methods of treatment mat would make the cellulose in low quality roughages more available to rumen microorganisms. In order to assess the merits of various physical and chemical treatments of wood and wood by-products, in vitro rumen fermentation tests were conducted and the extent of availability of nutrients to the microorganisms studied. 

There has been widespread use of antibiotics, specifically the ionophore monensin (brand name Rumensin), to increase feed efficiency in beef and dairy production (147,148) in both the U.S. and Canada, but not in Europe. The use of monensin has recently been extended in the U.S. for lactating and dry cow rations to improve feed efficiency (149) a use that was previously permitted in Canada. Monensin is very sensitive to cellulolytic microorganisms that include Butyrivibrio fihrisolvens (147), and there is concern that this will reduce the microbial population of the... 

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