Background: The current study had been conducted to understand the impact of breed as well season and stage lactation on various milk constituents viz. freezing point, SNF, pH, lactose, protein, fat electric conductivity Sahiwal Kankrej cows maintained at LRS”Livestock Research Station”, College Veterinary Animal Science, RAJUVAS, Bikaner, Rajasthan. Methods: Milk samples from 45 each were coll...

The aim of this study was to describe and analyze effects of parity, stage of lactation, milkability (3 groups of cows with differing peak flow rates), time of milking, and quarter position on milk production and milk flow measures at udder and quarter levels. Particular emphasis was put on changes to the decline phase and in duration of overmilking. More than 75,800 quarter milk flow curves an...

More and more research is done concerning nutritional programming. Human milk nutrients which are consumed by infants can influence their health in later life. High level of cholesterol in human milk paradoxically lowers the cholesterol concentration in blood in adults. During the course of human lactation the cholesterol concentration decreases from 31 mg/100cm(3) (colostrum) to 16 mg/100 cm(3...

We measured the plasma levels of amino acids at various reproductive stages in female rats, including the estrous cycle, pregnancy and lactation, and compared the resulting amino acid profiles using two- or three-dimensional figures. These figures revealed that the amino acid profiles of pregnant and lactating dams differed considerably from those during the estrous cycle or in male rats. The p...

Canal-Corretger, M. M., T. Cambras, J. Vilaplana, and A. Dı́ez-Noguera. Bright light during lactation alters the functioning of the circadian system of adult rats. Am. J. Physiol. Regulatory Integrative Comp. Physiol. 278: R201– R208, 2000.—To examine the role of light in the maturation of the circadian pacemaker, twelve groups of rats were raised in different conditions of exposure to constant ...

The aim of the study was to evaluate the effect of milk yield and stage of lactation on the activity of liver enzymes, cholesterol, and vitamin C concentration in blood of milking cows. The experiment was carried out on Polish Holstein-Friesian Black and White dairy cows with two different milk yield levels: M – medium (about 7000 kg per lactation) and H – high (about 10 000 kg per lactation). ...