Showing papers in "Journal of Dairy Science in 1982"

TL;DR: In this article, a scoring system with 1 to 5 scale was devised to measure body condition of dairy cows at any point during the lactation cycle, based on appearance and palpation of back and hind quarters only.

TL;DR: In this paper, Nitrogen in selected feedstuffs was fractionated based on solubility in mineral solvents and detergent solutions, and the results showed that Borate-phosphate buffer had a correlation coefficient of.92 with insoluble nitrogen obtained with autoclaved rumen fluid.

TL;DR: Physiological state of dairy animals is a predisposing factor in environmental influences on animal health, critical phases of life cycle include neonatal period, postpubertal reproduction, and lactation.

TL;DR: Subclinical ketosis is important because it may remain undetected and yet have effects on productivity which parallel those elicited by clinical ketosis, and should be directed toward understanding mechanisms conferring priority on milk production and regulating appetite.

TL;DR: Five species of rumen bacteria were grown in continuous culture to study effects of peptides and amino acids on efficiency of energy utilization for microbial protein synthesis and Amino acids were converted most efficiently to bacterial protein at concentrations of amino acid source below .031 g/liter.

TL;DR: A critical period for total mammary cell number in heifers during which mammary growth is affected adversely by a high plane of nutrition is suggested.

TL;DR: Depressions in digestibility for dry matter, neutral detergent fiber, hemicellulose, cellulose, energy, and cell solubles per unit of intake were greater on the low forage diet, and retention times of concentrate and forage were correlated with digestibility of gross energy.

TL;DR: The Formagraph as mentioned in this paper is an instrument for measuring milk clotting enzyme activity in comparison to a standard, and in contrast to the rolling bottle method, it does not require continual observation.

TL;DR: Increases in milk yield and protein yield are associated with increased rates of mammary blood flow, emphasizing the role of the latter in determining uptake, and the question of whether milk protein yield is limited by supply to the mammary gland of certain amino acids is discussed.

TL;DR: Mammary uptakes of glucose and long-chain fatty acids are proposed to be the major metabolic determinants of milk volume production and mammary efficiency, respectively and the ratio of glucogenic to lipogenic nutrients in the diet is proposed toBe the major determinant of spontaneous ketosis.

TL;DR: Lactation milk yield was regressed on somatic cell concentration, among other concomitant variables, for each of the first four lactations and linearity of the regression of yield on average log cell count makes this more desirable than actual cell count as a potential trait for indirect selection for genetic resistance to mastitis.

TL;DR: In this paper, the potential of the bovine mammary gland to synthesize milk was determined fully at parturition and the potential depends on the gland recieving adequate amounts of nutrients in the correct proportions.

TL;DR: Sodium bicarbonate and magnesium oxide prevented rapid declines in rumen pH associated with feeding in Experiment 2, which related to changes in acid detergent fiber digestion.

TL;DR: Number of breedings changed little as herd yield increased, but days open for highest producing herds averaged one estrous period shorter than for low producing herds, suggesting better detection of estrus.

TL;DR: A method for microbial protein determination based on Lowry's assay was devised and can be performed with small amount of rumen liquor (5 ml) and a large number of samples can be handled conveniently.

TL;DR: Fermented milk products should be considered in formulating diets for lactose-intolerant subjects and eight lactose intolerant individuals showed symptoms of abdominal distress and diarrhea following consumption of 500 ml of low fat milk whereas ingestion of the same quantity of yogurt or acidophilus milk did not result in any symptoms.

TL;DR: In vitro adherence, combined with subsequent in vivo studies, may provide a basis for screening candidate organisms for use in microbiotic supplements.

TL;DR: Limestone was totally ineffective in altering ruminal pH, fluid dilution rate, molar percentages of acetate and propionate, and synthesis of milk fat.

TL;DR: There was no luteinizing hormone surge, ovulation, or behavioral estrus after cessation of cortisol treatment, consistent with a role for corticosteroids in mediating inhibitory effects on reproduction produced by corticotropin administration.

TL;DR: The reduction in thyroxine and triiodothyronine of plasma and the decline in excretion of thyroxines and Triiodothyronsine suggested that environmental heat reduced synthesis of both hormones.

TL;DR: The effect of pH on the rate of fermentation of a pelleted concentrate and corn silage diet was studied in this article, where the pH of the artificial rumen contents was maintained by infusion of artificial saliva and automated addition of sodium carbonate.

TL;DR: A number of food, feed, and dairy products have been formulated to contain viable cells of Lactobacillus acidophilus, a resident of the small intestine and believed to help stabilize the gut microflora of both man and animals.

TL;DR: In this article, Cheddar cheese samples containing either 1.25, 1.5, or 1.75% sodium/potassium chloride (1:1, molar basis) were manufactured from a split lot of cheese curd.

TL;DR: Differences in results when cows received equal amounts of aflatoxin B1 may be attributable to the type of toxin administered (pure versus impure).

TL;DR: Five groups of eight newborn calves were used to study absorption of colostral immunoglobulin G and the quantities not recovered from plasma and feces reached a maximum when colostrum was given at 24 or 36 h after birth.

TL;DR: Effects of feeding dietary supplements of monensin and sodium bicarbonate singly or in combination on production of rumen volatile fatty acids, nitrogen balance, and rumen water kinetics were studied.

TL;DR: Comparisons for amount of milk vitamin A, beta-carotene, and total vitamin A equivalent and total amount of each component excreted in milk showed no significant independent effects attributed to California Mastitis Test.

TL;DR: Fermented milk products showed an increase in folic acid content and a slight decrease in concentration of vitamin B 12 and orotic acid was reduced in all fermented milk products.

TL;DR: Total protein, casein, and serum protein contents of milk showed a generally increasing trend from July to December, and the proportion of casein in milk protein decreased as cows became older.

TL;DR: Somatic cell counts were highest shortly after freshening, declined rapidly to a nadir between 25 and 45 days in milk, and rose throughout the remainder of lactation.