Potassium (K(+)) ions released into brain extracellular space (ECS) during neuroexcitation are efficiently taken up by astrocytes. Deletion of astrocyte water channel aquaporin-4 (AQP4) in mice alters neuroexcitation by reducing ECS [K(+)] accumulation and slowing K(+) reuptake. These effects could involve AQP4-dependent: (a) K(+) permeability, (b) resting ECS volume, (c) ECS contraction during...

Abstract. Of the various abiotic stresses, most important limitation of rice production in many countries is drought or water scarcity. The aim study to collection, hybrid and breeding varieties samples for tolerance prolonged soil air drought, select drought-resistant forms new varieties. Methods. objects research – 68 dry land were cultivated irrigated flooded areas (Proletarsk, Rostov region...

1. The effects of adrenalectomy on the adenylate cyclase--adenosine 3':5'-cyclic monophosphate (cyclic AMP) system of rat renal medulla were examined to evaluate the mechanism of the impaired water diuresis in glucocorticoid deficiency. 2. Concentrations of cyclic AMP in medullary tubules from adrenalectomized rats were significantly higher than in the tubules from control animals both in the p...

biotin is a water-soluble vitamin and co-factor for activation of carboxylases apoenzymes. biotinidase enzyme is essential for release of biotin from apoenzymes. absence of biotinidase is an autosomal recessive trait with a prevalence of 1 in 60000. clinical manifestations of biotinidase deficiency include dermatitis, alopecia, seizures, hypotonia, developmental delay, hearing loss, visual impa...

Marcotted 'Persian' (Tahiti*) lime trees with severe magnesium deficiency were sprayed with magnesium nitrate at 3 concentrations (1.75, 3.50, and 5.25 pounds of MgO/100 gallons of water). Three applications were made between March and September, 1967. Most of the magne sium deficiency symptoms disappeared after 2 sprays. The trees were completely green after the third spray, regardless of the ...

Women of reproductive age are at a high risk of iron deficiency, often as a result of diets low in bioavailable iron. In some settings, the iron content of domestic groundwater sources is high, yet its contribution to iron intake and status has not been examined. In a rural Bangladeshi population of women deficient in dietary iron, we evaluated the association between groundwater iron intake an...