Showing papers in "Journal of Dairy Science in 1979"

TL;DR: The relationship among diet composition, intake, and methane production was investigated with data during 404 total energy balance trials with Holstein cows as discussed by the authors, and the most useful predictor of total methane productin was amounts of soluble residue, hemicellulose, and cellulose that apparently were digested.

TL;DR: Evidence is that 2 liters of colostrum fed to Holstein calves may be optimum in the range studied for maximum pinocytotic activation of absorptive cells and maximum rate of absorption.

TL;DR: The morphology and physiology of the leukocyte is examined in this review in an attempt to explain why the phagocytic capacity of the neutrophil is reduced in the mammary gland of the bovine.

TL;DR: Field experience suggests that administration of cobalt to ruminants on cobalt-deficient diets improves their impaired breeding performance and knowledge of biochemical dysfunctions from trace element deficiencies is essential to determine the role which trace elements play in fertility of ruminant animals.

TL;DR: The hypocholestremic effect of milk is enhanced by fermentation or inclusion of lactic cultures, and consumption of cultured products containing such natural antibacterial substances may provide the consumer with protection against disease organisms.

TL;DR: In this article, a monochromator-based approach was proposed to select a set of wavelengths to use for prediction for each different type of forage or feedstuff, such as legume, grass-legume, heat damaged protein, and boron.

TL;DR: Economic losses from mastitis in the United States in 1976 were estimated by usable responses to a survey from 33 states representing 9.5 million cows or 86% of the dairy cow population by scientific papers estimating economic losses.

TL;DR: High-producing dairy cows were assigned randomly in equal numbers and fed one of three isocaloric rations of 12.7 to 19.3% crude protein starting at 4 days postpartum and continuing for 91 days, finding that increased crude protein had a negative influence on reproductive parameters.

TL;DR: Response surface contours for the maximum immunoglobulins IgG, IgM, and IgA, based on experimental data, have been included and interact in a curvilinear response.

TL;DR: In this article, six textural characteristics, hardness, cohesiveness, adhesiveness and gumminess, were measured by Instron Testing Machine for 11 cheese samples ranging from Parmesan to processed cheese.

TL;DR: Sensory evaluation of cheese reconstituted from fractions of mild and aged cheese showed that the water-soluble fraction made the greatest contribution to the intensity of the cheese flavor.

TL;DR: Protein reserves were measured in a nitrogen depletion-repletion experiment with 15 lactating Holstein cows and there was a greater amount of nitrogen repleted by the medium and high groups compared with the low-protein group.

TL;DR: The mitogenic effect of propionate and acetate on the rumen epithelial cells was apparent, but it seems to be weaker than that of butyrate judged from the relatively slow rise of the index in this study.

TL;DR: Relationships of number of fetuses, placental mass, and lactogenic activity of plasma to development of mammary gland during pregnancy and of litter size to milk yield were examined in British Saanen goats to support the view that placental lactogen has a significant role in the control of normal mammary development and function in goats.

TL;DR: Though the mothering effect is questionable, there is evidence that something labile is being transferred to the calf in the fresh colostrum, acting as a messenger to stimulate rapid absorptive activity in the intestinal epithelium.

TL;DR: In this paper, the dilution rate of rumen fluid was increased by infusion of both sodium chloride and sodium bicarbonate in steers fed either high concentrate or high roughage diets.

TL;DR: This paper is a general discussion of aspects concerning bovine mastitis in relation to common mammary pathogens.

TL;DR: Associations of changes with sampling periods in milk yield or body weight with changes in hormones and metabolites, and changes in growth hormone were related positively to changes in nonesterified fatty acids and negatively to insulin and lactic acid.

TL;DR: Extra income over feed cost more than compensated for greater health care and semen cost; however, the magnitude of the latter indicates a need for them to be considered when economically evaluating breeding programs where major emphasis is on milk yield.

TL;DR: Lipase from Pseudomonas fluorescens was studied for thermostability at temperatures ranging from 100 C to 160 C, and heating times necessary to inactivate 90% of the enzyme at constant temperature were extremely long even at high temperatures.

TL;DR: Multiple regression equations were derived from data for 6,351 Holsteins for first lactations and 17,978 later lactations found that within herds each day open between 40 and 140 days of lactation resulted in an average of 4.5kg less annual milk during current lactations of first-calf heifers and 8.6kg less for cows in later lactation.

TL;DR: Systemic immunization with viable staphylococci leading to subcutaneous abscess formation elicits significant protection to subsequent mammary challenge which is attributable, at least in part, to specific antibody of the IgG2 class cytophilic to polymorphs.

TL;DR: The primary effect of therapy is to increase the rate of eliminating established infections, although dry cow treatment also provides prophylactic benefits.

TL;DR: In this paper, seven Swiss cheeses and the oil soluble, water-soluble volatile, and water soluble nonvolatile fractions isolated from them were evaluated by the flavor profile method.

TL;DR: Intact cyrstals isolated from alfalfa leaves by low-temperature ashing and from bovine feces by washing and differential specific gravity were subjected to Raman microprobe analysis.

TL;DR: The distribution and effects of the 1/29 translocation in cattle, defined with chromosome banding techniques, are described and it is stressed that cattle populations using artificial insemination should undergo routine cytogenetic investigations.

TL;DR: Experimental data over 3 yr encompassing 277 calves raised under an early weaning program at the Purina Research Farm were summarized and estimates of digestible protein and digestible energy and their average ratio are reviewed relative to studies in which requirements were investigated.

TL;DR: The glucocorticoid response in cows with reduced stall numbers was indicative of stress; however, milk production was not affected.

TL;DR: Free natural estrogens in raw and commercial whole milk were quantitated by radioimmunoassay and the quantity of active estrogens is too low to demonstrate biological activity.