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butyrivibrio hungatei sp. nov. and pseudobutyrivibrio xylanivorans sp. nov., butyrate-producing bacteria from the rumen.two novel gram-negative, anaerobic, non-spore-forming, butyrate-producing bacterial species, strains mz 5t and jk 615t, were isolated from the rumen fluid of cow and sheep. both strains were curved rods that were motile by means of single polar or subpolar flagellum and common in the rumen microbial ecosystem. strain mz 5t produced high xylanase, proteinase, pectin hydrolase and dnase activities; 1,4-beta-endoglucanase was also detected in the culture medium. the bacterium utilized a wide range ...200312656174
biohydrogenation of c18 unsaturated fatty acids to stearic acid by a strain of butyrivibrio hungatei from the bovine rumen.to identify a ruminal isolate which transforms oleic, linoleic and linolenic acids to stearic acid and to identify transient intermediates formed during biohydrogenation.200314633116
relation between phylogenetic position, lipid metabolism and butyrate production by different butyrivibrio-like bacteria from the rumen.the butyrivibrio group comprises butyrivibrio fibrisolvens and related gram-positive bacteria isolated mainly from the rumen of cattle and sheep. the aim of this study was to investigate phenotypic characteristics that discriminate between different phylotypes. the phylogenetic position, derived from 16s rdna sequence data, of 45 isolates from different species and different countries was compared with their fermentation products, mechanism of butyrate formation, lipid metabolism and sensitivity ...200717077990
degradation of forage chicory by ruminal fibrolytic bacteria.determine the susceptibility of forage chicory (cichorium intybus l.) to degradation by ruminal fibrolytic bacteria and measure the effects on cell-wall pectic polysaccharides.200818713292
metabolism of polyunsaturated fatty acids and their toxicity to the microflora of the rumen.ruminal microorganisms hydrogenate polyunsaturated fatty acids (pufa) present in forages and thereby restrict the availability of health-promoting pufa in meat and milk. the aim of this study was to investigate pufa metabolism and the influence of pufa on members of the ruminal microflora. eleven of 26 predominant species of ruminal bacteria metabolised linoleic acid (la; cis-9,cis-12-18:2) substantially. the most common product was vaccenic acid (trans-11-18:1), produced by species related to b ...200717072533
rapid changes in key ruminal microbial populations during the induction of and recovery from diet-induced milk fat depression in dairy cows.the ruminant provides a powerful model for understanding the temporal dynamics of gastrointestinal microbial communities. diet-induced milk fat depression (mfd) in the dairy cow is caused by rumen-derived bioactive fatty acids, and is commonly attributed to the changes in the microbial population. the aim of the present study was to determine the changes occurring in nine ruminal bacterial taxa with well-characterised functions, and abundance of total fungi, ciliate protozoa and bacteria during ...201526123320
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