Most newborn animals or human infants, when displaced from their thermal neutral environment by a sufficiently large fall or rise in environmental temperature, react by increasing their rate of 02 consumption and heat production. In certain circumstances, however, the nervous mechanisms that control heat production may be impaired, so that when an animal is exposed to a cool environment it does...

this study  Evaluation the physiological activity effects of thyroid glands on the process of development and growth of ovaries and reproductive organs in rats.the study also investigates the adverse effects of antithyroid compounds adminidtered to mothers during lactation period on the developmental process of the newborn rat,s reproductive organs and the level of sexual hormones.the early and...

A dairy herd including approximately 50 milking cows and 40 heifers and calves was investigated. This herd was detected with high prevalence of calves persistently infected (PI) with bovine viral diarrhea virus (BVDV). Nine PI animals including a milking cow and 8 newborn calves were detected in the herd within 4 months. Prevalence of PI animals in this herd was estimated 7.0% which was very hi...

Recent evidence suggests that bone marrow-derived angioblasts or endothelial progenitor cells circulate in peripheral blood and can incorporate at sites of pathologic neovascularization or during the ovarian cycle. However, the incorporation of endothelial progenitor cells into vessels of nonischemic tissues in adult animals has not been observed. We hypothesized that the vascular microenvironm...

This review focuses on the physiological roles for kappa opioid receptors (KORs) in adult animals and humans, as well as in the developing newborn animal. Our recent findings have provided new information that under physiological conditions in conscious newborn animals, activation of KORs with the selective agonist, U-50488H, results in an aquaresis, as previously observed in adult animals and ...

Anesthesia is generally accepted as safe in most adult populations; however, in pediatric patients questions exist regarding the potential for long-term detrimental effects. Various anesthetic agents are associated with neuronal degeneration when administered to neonatal animals. The mechanism of damage is thought to be via accelerated apoptosis, a normally beneficial process in the maintenance...

The objective of this study was to observe possible interactions between the renin-angiotensin and nitrergic systems in chronic hypoxia-induced pulmonary hypertension in newborn piglets. Thirteen chronically instrumented newborn piglets (6.3 ± 0.9 days; 2369 ± 491 g) were randomly assigned to receive saline (placebo, P) or the AT(1) receptor (AT(1)-R) blocker L-158,809 (L) during 6 days of hypo...

The effects of vasoconstrictors and vasodilators were compared in conscious, newborn lambs and adult sheep instrumented with electromagnetic flow probes on the ascending aorta and catheters in the thoracic aorta. Methoxamine, angiotensin II, norepinephrine, nitroglycerin and isoproterenol were administered intravenously to evaluate their effects on arterial pressure, cardiac output and systemic...

As a result of the study, new knowledge was obtained for first time about effect FXI locus polymorphism on quality reproduction in dairy cattle, degree influence frequency development pathologies reproductive organs, their clinical manifestation individuals - carriers anomaly and healthy animals established. The embryonic postembryonic mortality, condition safety newborn calves comparison with ...