Heritability estimates, by year of freshening of daughter, were obtained from daughter-dam and granddaughter-granddam regressions using 61,482 triply matched first lactations of artificially sired Holstein cows obtained from the Northeast Dairy Records Processing Laboratory. After adjusting for herd-year-season effects, residual effects may include additive and other genetic effects of the anim...

Dietary coconut oil (CO), a source of saturated, predominantly mediumchain fatty acids (FA), reduced enteric methane emission, but also reduced DMI and milk yield in our earlier studies. Here, we examined lactational performance of early lactation cows fed 2 sources of saturated FA, differing in predominant chain lengths. Dietary treatments were: no added fat (CTRL); 2.7% of DM as saturated lon...

We previously reported that milk production by dairy cows was increased by adding specific xylanase-rich (XYL) and xylanase-cellulase enzymes to corn silage-based diets containing 0 or 10% bermudagrass silage. This study examined effects of adding XYL on the intake and performance of lactating dairy cows consuming a totally mixed ration (TMR) formulated with a greater proportion of bermudagrass...

The effects of supplementation with grass silage and replacement of some corn in the concentrate with soybean meal (SBM) on milk production, and milk fatty acid (FA) profiles were evaluated in a replicated 4 x 4 Latin square study using 16 dairy cows grazing pasture composed of ryegrass, Kentucky bluegrass, and white clover. Each experimental period lasted for 3 wk. The 4 dietary treatments wer...

The objective of the present study was to evaluate effects postpartum oral calcium supplementation on milk yield, energy-corrected fat concentration, protein and somatic cell count linear score across first 3 monthly tests postpartum, peak risk pregnancy at service, hazard by 150 d in 1,129 multiparous Jersey × Holstein crossbreed cows from 2 commercial dairies. After calving, were systematical...

The optimum level of fresh granulated low-calcium (0.2%) skim milk co-precipitate, as fat substitute in low-fat ground pork patties was determined on the basis of physico-chemical, cooking and sensory properties. Low-fat ground pork patties (<10% total fat), formulated with 15 per cent water, 4 per cent added fat, 1.5 per cent salt and 4-10 per cent milk co-precipitate, were evaluated for proxi...

Consumption of non- or low-fat dairy products is recommended as a strategy to lower the risk of childhood obesity. However, recent evidence suggests that consumption of whole fat dairy products may, in fact, be protective against obesity. Our objective was to determine the association between milk fat consumption and severe obesity among three-year-old Latino children, a population with a dispr...

background: although lowering of food cholesterol is an effective way to reduce blood cholesterol, but recently some effective health and bioactivity characteristics of the milk fat components have been identified, so by decreasing the use of milk fat, an important source of fat-soluble vitamins and bioactive components of milk is limited. recent studies have shown that the growth of lactic aci...

Human milk is the ideal food to nourish newborn babies; it contains important nutrients: proteins, carbohydrates, fat, vitamins and minerals, which are needed to provide agood health to the infants. Milk fat provides about 50% of energy to infants and its fatty acids are essential for brain and retina development. Therefore, analysis of the lipid fraction of human milk is an important task, esp...

Composition of milk fa t Cows’ milk fat consists mainly of triglycerides (98-99 g/100 g) together with smaller amounts of phospholipids (0 .9 ~ / I W g), cholesterol (0.3 g/100 g), carotenoids (6-7 pg/g), vitamin A (6-8 pg/g), vitamin D (0-5 pg cholecalciferoV1 oo g) and trace concentrations of other fat-soluble substances such as lanosterol, P-sitosterol, saturated hydrocarbons, squalene, glyc...