The objective of this study was to determine if biostimulation of prepuberal beef heifers by mature bulls would alter proportions of heifers exhibiting puberty, or age or weight at puberty. Angus (A), A X Hereford (H) and Tarentaise X HA heifers (n = 103) were stratified by age and weight within breed-type and location of birth and allotted randomly to the following treatments: 1) heifers expos...

We have recently identified a novel amino-terminal fragment of pro-brain natriuretic peptide (NT-proBNP) in the circulation of humans, the concentration of which increases progressively as the left ventricle fails. To clarify the origins of NT-proBNP in experimental animals, we have developed an RIA for NT-proBNP based on residues 52-71 of ovine proBNP-(1-103) and used it to study cardiac proce...

Insoluble, mature collagen fibers from bovine skin have been partially solubilized by mild, denaturing, but nonhydrolytic means. The soluble denatured collagen was fractionated by alcohol coacervation, and a fraction rich in high-molecular-weight alpha-chains was obtained. The heavy alpha-chains were isolated by carboxymethylcellulose chromatography. Renaturation, followed by measurements of op...

Variances and covariances were estimated for birth weight (BWT), weaning weight (WW), yearling gain (YG), yearling weight (YW), yearling height (YH), relative growth from birth to weaning (RGW) and weaning to yearling (RGY), and mature weight (MW). Field records on 572,446 Polled Hereford cattle were analyzed. Because multiple dam weights were collected on a cow the MW used in the analysis was ...

A single mature adhesive disc of Parthenocissus tricuspidata has an average mass of only about 0.0005 g, an average attached area of about 1.22 mm2, and an adhesive force of about 13.7 N. On average, the disc can support a combined weight of stem, leaf, branchlet, and tendril which is 260 times greater than its own weight during the growth, and can sustain a maximum pulling force which is 28000...

We studied the effect of exercise on ovariectomized mature multiparous rats. Old retired breeder SpragueDawley rats were ovariectomized and divided into a sedentary and a treadmill-trained (20 weeks) groups. Exercise training decreased body weight gain, fat weight around the uterus and plasma triglyceride content significantly compared with the sedentary group, but food intake was unaffected. E...

The incidence of ROP varies with birth weight but it has been reported to be approximately 50-70% in infants whose weight is less than 1250g at birth. The more premature the infant, the more likely ROP is to develop [1]. Furthermore, an observational study from United Kingdom found that the birth weight of infants from highly developed countries was 737-763g compared with 903-1527g in less-deve...

A discrepancy of about 20% exists between the molecular weight of the alpha subunit of Torpedo californica electroplax acetylcholine receptor as determined by gel electrophoresis of the mature protein (Mr 40,000 +/- 2000) and by nucleotide sequence analysis of cDNA (Mr approximately equal to 50,000). We demonstrate by amino acid sequence analysis that post-translational processing does not occu...