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Showing 1 to 17 of 17 for “"biohydrogenation"”.
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Rumen biohydrogenation of polyunsaturated fatty acids in high quality pasture
… to determine the effect of low rumen pH on biohydrogenation of C18 fatty acids. A standard ryegrass sample was incubated in nylon bags in the rumen of a dry cow fed low-quality lucerne silage, or in two milking cows fed with high-quality LUDF pasture, during four experimental periods. The …
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Biohydrogenation, postruminal flow, and apparent digestibility of dietary lipids in lactating Holstein cows
… two 4 X 4 Latin square experiments to evaluate biohydrogenation, flow rates, and digestibility of dietary fatty acids in the gastrointestinal tract. In the first experiment, four cows were fed diets with 0% supplemental fat, 3% tallow, 3% partially hydrogenated tallow, or 3% tallow coated with …
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Comparative evaluation of the effects of whole essential oils and their active constituent compounds on the biohydrogenation of polyunsaturated fatty acids and fermentation characteristics of rumen microbes in vitro
… activities of rumen microbes and the biohydrogenation (BH) of n-3 polyunsaturated fatty acids (PUFA) were evaluated in four in vitro experiments and one feeding trial . In all the in vitro experiments, rumen fluid was collected from Hartline x Texel cross cull ewes. A basal feedstock …
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Modifying Fatty Acid Composition of Bovine Milk by Abomasal Infusion or Dietary Supplementation of Seed Oils or Fish Oil
… reflected the extent of unsaturated fatty acid biohydrogenation in the rumen. Dietary supplementation with canola oil increased yield of cis-18:1 in milk by 21 g for each 100 g of supplemental cis-18:1 intake. Yield of 18:2 in milk was raised by 3 g for each 100 g of supplemental 18:2 intake by …
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The protection of the unsaturated fatty acids of dried grass and sunflower seed against biohydrogenation by rumen micro-organisms : a thesis presented in partial fulfilment of the requirements for the degree of Master of Agricultural Science in Animal Science at Massey University
Ryegrass which had been dried and treated with HCHO was incubated with the rumen contents of a pasture-grazed cow. The protein in the grass was protected from degradation by the rumen microbes. The degree of protection of the protein increased with the rate of HCHO application over the range …
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Influence of Dietary Fish Oil on the Concentration of Conjugated Linoleic Acid and Other Healthful Fatty Acids in Milk Fat from Lactating Dairy Cows
… is an intermediary product of ruminal biohydrogenation of polyunsaturated fatty acids, and is found predominately in dairy products. Our objective was to feed Menhaden fish oil to elevate concentrations of CLA, TVA, and omega-3 fatty acids in milk. Twelve multiparous Holstein cows at 48 …
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Steam-Flaked Soybeans in Dairy Cattle Diets
… steam-flaked soybeans may lead to more complete biohydrogenation as well as being a source of rumen protected fat.</p>
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Systemic and Intracellular Trafficking of Long-chain Fatty Acids in Lactating Dairy Cattle
… of omega-3 fatty acids provides protection from biohydrogenation in the rumen and allows them to be available for absorption and utilization in the small intestine. Lactating cows were supplemented with rumen protected algae biomass or algal oil in a 4 × 4 Latin Square. Feeding lipid encapsulated …
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Reducing the impact of feedstuff transport by a better utilization of plant wastes for livestock: a way to improve meat quality?
… and carcass traits. Feeding CM promoted ruminal biohydrogenation of fatty acids (FA) through a modulation of the rumen bacterial community and consequently, reduced the proportion of t-11 18:1 and c-9,t-11 conjugated linoleic acid (CLA) in lamb meat. Moreover, dietary CM did not influence the …
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Peripartal Lipid Metabolism and Tissue Fatty Acid Composition in Holstein Cows Fed Supplemental Fat During the Dry Period
… soybean oil infused into the abomasum to avoid biohydrogenation (U) to provide 120% (CA, S, and U) or 80% (CR) of NEL requirements (NRC, 1989). Feeding U increased C18:2 and decreased C20:4 and C22:6 in hepatic phospholipids on d 1 postpartum; changes were reversed by d 21 after calving. Fatty …
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Effects of mixer type on utilization of diets with increasing amounts of modified wet distillers grains with solubles for lactating dairy cattle
… rumen environment and favored alternative biohydrogenation pathways. Feed conversion efficiency (FCE; energy-corrected milk/DMI) decreased linearly (P = 0.007) as MWDGS increased, but FCE tended to be maintained when higher MWDGS diets were mixed using KMF rather than VA (mixer, P = 0.12). …
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Activity and mRNA abundance of enzymes for fatty acid synthesis and desaturation in mammary cell cultures
… acid (18:0). This is due to extensive ruminal biohydrogenation of unsaturated fatty acids. Studies have indicated that saturated fatty acids such as 18:0 are enhancers and that certain unsaturated fatty acids are inhibitors of de novo fatty acid synthesis in tissues such as the liver and …
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Effects of heat and chemical treatment of whole oilseeds on site and extent of digestion of protein and lipid by cattle
… more mono- and polyunsaturated fatty acids from biohydrogenation in the rumen than steers fed crushed canola seed and provided more intestinally available unsaturated fatty acids than steers fed untreated canola seed. Experiment 3, multiparous lactating Holstein cows (n = 12; 618 kg; 47 days in …
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In vitro screening of commercial sorghum hybrids and omega-3 supplementation in Holstein steers
… these essential fatty acids; however, extensive biohydrogenation will occur which leads to a small proportion of dietary omega-3 fatty acids reaching the small intestine, compared to the amount of omega-3 fatty acids in the basal diet.
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Plant secondary compounds in ruminant feeding: implication and effect on meat fatty acid.
La FAO prevede che entro il 2050 si debbano sfamare 9.1 miliardi di persone. La sfida per l agricoltura è quella di aumentare le produzioni rispettando la qualità dei prodotti e le risorse naturali. Secondo la WHO, le carni rosse possono favorire l insorgenza di malattie cardiovascolari e del …
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Effects of Protected Fat When Fed to Dairy Cattle and the Interaction Between Supplemental Fat and Antibiotics in Mixed Cultures.
… 200 in protecting unsaturated fatty acids from biohydrogenation in the rumen and also observes the effects of these 'protected fats' on lactation performance. Twenty-eight Holstein cows in early lactation were divided equally into four different treatment groups: 1) Control (with no supplemental …
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Towards a "zero Km" diet for ruminant feeding [Verso una dieta a "km zero" per l'alimentazione dei ruminanti]
L'utilizzo di sottoprodotti agroindustriali in sostituzione di mangimi convenzionali è una strategia per ridurre l'impatto ambientale causato dalla produzione e dal trasporto di mangimi e la competizione feed-food, abbassando al contempo i costi del loro smaltimento. Le industrie della frutta …