Ruminant-derived foods contain high proportions of saturated fats as a result of ruminal biohydrogenation that rapidly saturates and thus limits the availability of free unsaturated fatty acids for assimilation. The objective of this study was to evaluate the effects of glycerol on ruminal free-fatty acid (FFA) production rates and in vitro fermentation kinetics of alfalfa hay. In vitro incubat...

Ruminant fat is rich in SFA, partly due to the biohydrogenation of dietary PUFA to SFA in the rumen. This process can be inhibited by the dietary inclusion of fish oil. The only bacteria isolated from the rumen capable of converting PUFA to SFA are closely related to Clostridium proteoclasticum. The aim of this study was to investigate if a correlation could be found in vivo between dietary fis...

The objectives of this study were to evaluate the effect of dried distillers grains with solubles (DDGS) on ruminal biohydrogenation and duodenal flow of fatty acids, and to evaluate effects on the ruminal and duodenal microbial community using Roche 454 pyro-sequencing. Three crossbred steers (average BW 780 ± 137 kg) fitted with ruminal and duodenal cannulae were used in a 3-diet, 6-period cr...

Advances in our understanding of lipid metabolism in the ruminant and the effect of specific fatty acids on both ruminant metabolism and human health has increased significantly in recent years. Unique biohydrogenation intermediates formed in the rumen have been shown to be potent inhibitors of milk fat synthesis, and the biology behind this and its potential application and benefit to both ani...

conjugated linoleic acids (cla) are natural constituents of meat and dairy products from ruminants, originating from bacterial biohydrogenation in the rumen. cla supplementation increases the health benefits of animal-derived foods. there are inconsistent reports of the effects of dietary cla on chicken’s performance; however, the majority of previous reports cite anti-lipogenic effects of cla....

The effects of diets (i.e., high fibre, HF and high concentrate, HC) supplemented with either fumaric acid (FUM; 8 mmol/L) or maleic acid (MAL; 8 mmol/L) and different plant oils (35.0 g/kg dry matter; sunflower, SO; rapeseed, RO; and linseed, LO) on rumen sheep fatty acids (FA) concentration and biohydrogenation (BH) in batch cultures were examined. The oils rich in linoleic acid (SO, 535 g/kg...

An important objective is to identify nutrients or dietary factors that are most critical for advancing our knowledge of, and improving our ability to predict, milk protein production. The Dairy NRC (2001) model is sensitive to prediction of microbial protein synthesis, which is among the most important component of models integrating requirement and corresponding supply of metabolizable protei...

Conjugated linoleic acids (CLA) are natural constituents of meat and dairy products from ruminants, originating from bacterial biohydrogenation in the rumen. CLA supplementation increases the health benefits of animal-derived foods. There are inconsistent reports of the effects of dietary CLA on chicken’s performance; however, the majority of previous reports cite anti-lipogenic effects of CLA....