Showing papers in "Journal of Dairy Science in 1974"

TL;DR: In this paper, residues in fermentation tubes were filtered sequentially through glass wool mats, sintered glass crucibles, and glass fiber discs, and the results showed that residual organic matter which passed glass wool was not retained by glass fiber.

TL;DR: Conception rates of a Holstein dairy herd near Culiacan on the west coast of Mexico were evaluated with respect to the average temperature-humidity index of the 2 days prior to breeding, the day of breeding, and the day following breeding indicating that temperature- Humidity of individual days before and after breeding influenced breeding efficiency.

TL;DR: In this paper, the problem of finding the best evaluation of a sire that is regarded as a random individual from some specified subpopulation (group) has been solved provided relative values of elements of the variance-covariance matrix of random variables in the model are known.

TL;DR: Foamy bloat, which characteristically occurs in beef cattle fed on rations high in concentrates and low in roughages, and which may be chronic, will be discussed separately and in less detail.

TL;DR: Log-log regression analysis was used to compare tissue weights for common body weight and to develop equations for predicting tissue weights from body weights.

TL;DR: Parturient paresis was prevented by feeding a calcium-deficient diet composed of corn silage, ground shelled corn, a dried molasses product, urea, and monosodium phosphate, which supplied only 8g of calcium daily per 450kg body weight.

TL;DR: Comparisons within bulls for pairs of measurements revealed no significant difference in the number of sperm recovered from the rete testis, from the cauda epididymidis, or representing one-half of those ejaculated daily before surgery.

TL;DR: In this article, the behavior of 21 Holstein cows was studied in feeding and free stall areas by time-lapse photography, and it was found that dominant cows preferred to succeed each other and occupy adjacent stalls.

TL;DR: Parturient paresis is a metabolic disease which is associated with parturition and initiation of lactation characterized by low total serum calcium and inorganic phosphorus and attempts to prevent failure of this mechanism are attempted.

TL;DR: A 42-mo field trial was initiated in 65 New York Dairy Herd Improvement herds to evaluate the effects of length of dry period on disorders at calving and subsequent milk production, and the depressing effect of the short dry periods did not carry over to the second lactation.

TL;DR: Factors associated with the incidence of retained placentas in Holstein cows were determined from records of 298 carvings at the South Dakota State University research farm from 1968 to 1972.

TL;DR: Unlike most other methods of recovering protein from whey, solubility was not adversely affected by ultrafiltration, however, protein concentrates were susceptible to heat; normal pasteurization temperatures resulted in approximately 20% denaturation.

TL;DR: For example, this article found that moisture content, mineral retention, and rheological properties of mozzarella were affected significantly by the type of acid and pH at coagulation, and direct relationships existed between calcium, phosphate, viscosity, and modulus of elasticity.

TL;DR: Quantities of prolactin, growth hormone, and glucocorticoid in serum are probably sufficient to support mammary growth during pregnancy, and increased serum corticoid and growth hormone at parturition may be involved in onset of milk secretion.

TL;DR: The hypothesis that an essential amino acid will accumulate in blood plasma only when supplied in excess of requirement was the basis of an attempt to identify essential amino acids most likely limiting lactation as mentioned in this paper.

TL;DR: The use of cheese whey as a base for manufacture of a variety of beverages, both alcoholic and nonalcoholic, is reviewed.

TL;DR: Preventive measures include minimum grain and corn silage prepartum with other forage ad libitum and the best known management practices to reduce other parturient disorders.

TL;DR: Increased mammary gland uptake of 18 carbon fatty acid inhibited de novo synthesis of fatty acids by mammary tissue in Jersey cows receiving the protected supplement.

TL;DR: Cows in the latter stages of lactation did not appear to regulate their intake according to physiological requirements for milk production, and cows in the groups fed higher concentrate feeds achieved energy balance earlier.

TL;DR: These studies demonstrate a specific response to abomasally infused protein in well-fed cows, and multiple regression analyses indicated that response to protein infusion depended more on milk yield than on amount infused.

TL;DR: Production of enzyme by the lactic acid bacteria was markedly suppressed upon incubation under nitrogen whereas Strains No. 50 and 53 increased production under nitrogen, markedly affected by pH of the medium.

TL;DR: Wisconsin Mastitis Test positive (>20mm) milks contained higher Lipase activities and acid degree values and lower concentrations of phospholipids than the corresponding negative samples.

TL;DR: Conception rates with semen Frozen in straws are comparable to fertility of semen frozen in ampules, and prospects are encouraging for further improvements with the straw as procedures are refined, according to an extensive review of the literature.

TL;DR: This paper used the minimum norm quadratic unbiased estimation method of estimating variance components in an iterative procedure to estimate variances for sire and error and to predict genetic values of sires for survival rate simultaneously.

TL;DR: A ureolytic strain (strain D) of Selenomonas ruminantium was isolated from rumen fluid in numbers of 2 × 10 7 per ml or more.

TL;DR: Tritim-labeled palmitic acid was put into the rumen of a lactating cow and the precipitable lipopretiens, consisting of a mixture of one lipoprotein of very low density and two others of low density, were separated from serial smaples of arterial, jugular, and mammary venous serum.

TL;DR: Regressions of crown-rump length in millimeters on day of pregnancy and of day of gestation on crown- rump length were computed for 229 outbred Holstein-Friesian fetuses of known gestation ages.

TL;DR: The infertility oftesticular sperm may result from intrinsic factors, a failure of sperm transport into the oviducts, or unusually rapid elimination of testicular sperm from the oVIDucts.

TL;DR: Concentration of all major milk constituents except for lactose increased markedly through the lactation cycle, and dry matter, fat, casein, and ash showed increases of 56%, 89%, 66%, and 15%; lactose decreased 17%.