Showing papers in "Journal of Dairy Science in 1984"

TL;DR: Because of increased interest in milk proteins of species other than bovine, the Committee suggests that these be identified as homologs of those already characterized in European, Bos taurus , and Indian, Bos indicus , cattle.

TL;DR: In a feeding trial involving newborn dairy calves supplementation of the diet with the more bile resistant strain of Lactobacillus acidophilus caused greater increases of numbers of facultative lactobabilli in the upper small intestines than did the strain exhibiting lower resistance to bile.

TL;DR: In this paper, the effects of thermal treatments (up to 150°C) on structure and solubility of the different whey proteins were analyzed and the effect of changes of environmental conditions such as pH and the presence of lactose and calcium salts was discussed.

TL;DR: Samples of blood plasma showed that cows consuming the anionic diet maintained calcium and phosphorus through parturition, whereas cows consume the cationic diet decreased in these minerals around calving, and hydroxyproline was higher for cowsconsuming the anionics during the peripartal period.

TL;DR: Responses of ruminal microbes to long-chain fatty acids in forms of free acids, calcium salts, or triglycerides were measured in trials with rumen cannulated heifers to confirm that these are efficacious for protectingRuminal microbes from adverse effects of fat.

TL;DR: In dairy cows two distinct and important aspects of the interrelationship between protein and energy-yielding nutrients can be identified; that changing "protein" supply to tissues can alter the pattern and efficiency of absorbed nutrient use and that at high levels of feeding rumen microbial demand for nitrogen per unit fermentable organic matter is high.

TL;DR: Emphasis is placed on the role of rumen protozoa in decreasing the ratio of protein to energy in absorbed nutrients in ruminants on diets that are marginally deficient in protein.

TL;DR: Two trials ascertained whether feeding fatty acids as preformed calcium soaps would permit normal digestibility of fiber without reducing availabilities of fatty acids or energy and found that tallow fatty acids markedly reduced Digestibility of dry matter and fiber in the rumen.

TL;DR: It is concluded that dairy cow diets deficient of vitamin E may elevate incidence of clinical mastitis, and Selenium deficiency may result in greater duration of clinical symptoms, and selenium may interact with vitamin E.

TL;DR: Extensive experiments in eight ureotelic species, including man, show that urinary excretion of orotic acid becomes significantly elevated when the quantity of ammonia presented to the liver exceeds the capacity for normal detoxification.

TL;DR: In this paper, the use of calcium data in cheese specifications should improve the prediction rate when young cheese is graded to assess its probable quality at maturity, and the development in New Zealand of the "multiple strain" and "single pair" concepts.

TL;DR: In this paper, polyacrylamide gel electrophoresis methods were used to phenotype caseins for 2045 cows and milk serum proteins for 3870 cows distributed in 63 Quebec dairy herds.

TL;DR: Selenium injections and oral vitamin E supplementation prepartum were related to incidence of retained placenta, metritis, and cystic ovaries in a 2 X 2 factorial experiment and were effective for reducing the incidence of metritis and cystan ovaries during the early postpartum period.

TL;DR: Overall severity and duration of scours were less for calves fed colostrum with high compared to low immunoglobulin and a positive relationship developed between serum protein and immunoglOBulin at 12 h to 24 h, 4 and 11 days.

TL;DR: The relationship between Dairy Herd Improvement program test-day milk yield and somatic cell counts in milk was analyzed in 34 dairy herds over 3 yr and estimates were more accurate when somaticcell counts were transformed to natural logarithms rather than actual.

TL;DR: In this article, the authors measured high concentrations of individual short-chain free fatty acids in Swiss, Brick, and Cheddar cheeses, and found that these free fatty acid contents were suppressed by high pH of these cheeses.

TL;DR: In this paper, the important functional properties of whey protein concentrates are solubility, whipping and foaming, emulsification, and gelation, and process modifications such as selective heat treatment, selective demineralization or ion exchange, and preteolytic enzyme hydrolysis may be used to alter these functional properties for a desired use application.

TL;DR: In this article, the authors used laboratory bag silos to assess the effect of microbial inocula and ammonia on fermentation of alfalfa silage and found that microbial inoculation increased lactic acid at all dry matters and inhibited proteolysis.

TL;DR: A review of the casein micelles can be found in this paper, where the authors bring what is known about casein mouselles together into a coherent summary and conclude that some of the earlier models and theories no longer appear workable, and much is left to be concluded.

TL;DR: In this article, the major individual free fatty acid in commercial samples of four Italian cheese varieties were measured during aging at 2 or 7°C, and the results showed that Romano cheeses had the greatest amounts of free fatty acids and the strongest free acid flavors, whereas those of carbons 14 to 18 increased during latter stages of aging.

TL;DR: There was an increase of chondroitin sulfates and heparin-like material in estrual cervical mucus compared with cervical mucUS collected during the luteal phase of the estrous cycle.

TL;DR: Breath hydrogen production was used as a measure of lactose malabsorption in human test subjects following the consumption of both heated and unheated cultured yogurt, indicating that lactose hydrolysis was improved in the small intestine of the individuals consuming the unheating cultured yogurt.

TL;DR: Improvement of accuracy of evaluations from multiple trait analyses compared to single trait analyses and influence of correlations among genetic and residual elements on genetic evaluations for each trait are discussed.

TL;DR: The relationship of zinc to morphologic, physiologic, and metabolic functions in the male reproductive system are summarized, and gaps in current understanding are pointed out.

TL;DR: In this article, a method was described for preparation of samples of bovine feces for analysis of ytterbium and cobalt ethylenediaminetetraacetate complex.

TL;DR: Effects of excessive intake of sulfur by ruminants on feed intake, animal performance, ruminal digestion and motility, rumination, and other physiological functions are reported.

TL;DR: In this article, the authors evaluated the solubility and rate and extent of ruminal digestion of nitrogen in wet distillers grains, corn gluten feed protein, and soybean meal protein intermediate.

TL;DR: Water intakes and other experimental data over 3 yr encompassing 335 calves raised under an early weaning program at the Purina Research Farm were summarized and there is no evidence that scouring will be affected negatively by water intake.

TL;DR: Net absorptions from portal-drained viscera of glucose, ammonia nitrogen, alpha-amino nitrogen, and urea nitrogen were measured in four Holstein cows in first lactations, indicating no uptake of glucose from dietary sources.

TL;DR: A review of postmilking teat antisepsis in the control of mastitis is presented and current recommendations for development of efficacy data on teat dips are outlined.