African mole-rats are strictly subterranean mammals that live in extensive burrow systems. High humidity levels in the burrows prevent mole-rats from thermoregulating using evaporative cooling. However, the relatively stable environment of the burrows promotes moderate temperatures and small daily temperature fluctuations. Mole-rats therefore display a relatively wide range of thermoregulation ...

Previous work from our laboratories has shown that juvenile Fischer 344 (F344) rats are less playful than other strains and also appear to be compromised in dopamine (DA) functioning. To determine whether the dysfunctional play in this strain is associated with deficits in the handling and delivery of vesicular DA, the following experiments assessed the extent to which F344 rats are differentia...

In an experimental study, the morphofunctional features of spleen 6-month-old white rats were studied in normal conditions and chronic radiation sickness. The study found that response to action a factor rats, there is decrease structural parameters. This reflected morphological parameters organ. As result, functional activity spleen’s lymphoid tissue decreases.

The responsiveness of central nervous system alpha 2-adrenergic receptors in the neural control of renal function was compared in conscious spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto rats (WKY) on normal or high sodium intake (3-4 weeks of 1% NaCl for drinking). The responsiveness of central alpha 2-adrenergic receptors was determined by comparing among groups the dose-...

This study investigated the behavior of hypertensive-prone and nonhypertensive-prone rat strains to see whether there are differences in behavioral reactivity to environmental stimulation. Of primary interest was general activity, because investigators have assumed it to be an index of reactivity to environmental stimulation and to be correlated with the elevation of blood pressure in spontaneo...

Cerebrovascular effects of intravenous (iv) nitroglycerin (NTG) infusions were tested in four month old spontaneously hypertensive rats (SHR) and Wistar Kyoto controls (WKY). Cerebral blood flow (CBF) changes were measured during iv NTG infusion in ventilated, halothane anesthetized rats using radioactive microspheres. In control WKY rats given isotonic saline infusions instead of NTG, blood pr...

Kersen parasite leaves (Dendropthoe pentandra (L.) Miq) is a type of that hemiparasite and contains active compounds, namely, flavonoids, terpenoids tannins. This compound has benefits as an antihyperglycemic. The aim this study to determine the effect lowering blood glucose levels from infusion (Dendrophthoe in white male rats induced by alloxan. research was laboratory experimental with rando...

The rare-earth metal hydroxylamide compound Y[N(SiHMe2)2]2[ONBn2][THF] (1) was prepared by the silylamide elimination pathway from the reaction of N,N-dibenzylhydroxylamine, Bn2NOH (Bn = CH2C6H5), with Y[N(SiHMe2)2]3[THF]2 and was characterised by multinuclear NMR spectroscopy and elemental analysis. The compounds [Cp2Y(ONBn2)]2 (2a) [Cp2Sm(ONBn2)]2 (2b) were obtained by the reactions of MCp3 (...

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The standard de nition of convergence of an in nite product of scalars is extended to the in nite product P= n=1Bn of k × k matrices; that is, P is convergent according to the de nition given here if and only if there is an integer N such that Bn is invertible for n¿N and P= limn→∞ m=NBm is invertible. A family of su cient conditions for this kind of convergence is given, along with examples sh...