Using lactation in mice as a model, we sought to determine whether ceilings on sustained energy expenditure reside in the capacities of energy-acquiring and input organs (such as the intestine) or of energy-expending and output organs (such as the mammary glands). To distinguish between these possibilities experimentally, we surgically varied the teat number of lactating mother mice while simul...

648 Effect of altering the ratio of dietary n-6 to n-3 fatty acids on lactational performance and acute phase response to an intramammary lipopolysaccharide challenge. L. F. Greco*1, J. T. Neves Neto1, A. Pedrico1, R. Ferrazza1, F. S. Lima1, R. S. Bisinotto1, N. Martinez1, E. S. Ribeiro1, M. Garcia1, G. C. Gomes1, M. A. Ballou2, W. W. Thatcher1, C. R. Staples1, and J. E. P. Santos1, 1University...

Growing evidence has shown that decabromodiphenyl ether (BDE-209) can disrupt thyroid hormones and induce neurological and developmental effects, especially for the fetuses and neonates after prenatal or postnatal exposure. The present study was carried out to examine the effects of in utero and lactational exposure to BDE-209 on the absorption and tissue distribution of BDE-209 and its metabol...

In this paper, the term “leafy-floury silage” was used to describe corn silage hybrids evaluated in study. However, studied did not contain leafy gene nor they a (floury gene, opaque-1 or opaque-2 gene) that would result kernels containing mostly floury endosperm. The were conventional standard/yellow dent varieties. terms “starch” and “floury as common industry define differences ruminal starc...

The role of estrogen and progesterone receptors in breast cancer biology is well established. In contrast, other steroid hormones are less well studied. Glucocorticoids (GCs) are known to play a role in mammary development and differentiation; thus, it is of interest to attempt to delineate their immunoexpression across a spectrum of mammary epithelia. Aim. To delineate the distribution pattern...

Lactational means of somatic cell score from sample days of primiparous DHI cows were analyzed to compare dairy records processing centers for data properties, to examine effects of age at calving and month of calving on somatic cell score, and to calculate preliminary PTA of sires for somatic cell scores. Five processing centers contributed data but differed substantially with respect to avail...

It has been previously reported (Y o k o y am a and 0 t a, 1959a and b) that the lesions placed in the periventricular and the medial hypothalamic areas in lactating rats impaired oxytocin secretion selectively. Considerable amount of milk was obtained by oxytocin replacement in these rats, although the amount of milk was less than that obtained in normal lactating animals. There has been a con...