Net sodium influx under K-free conditions was independent of the intracellular sodium ion concentration, [Na](i), and was increased by ouabain. Unidirectional sodium influx was the sum of a component independent of [Na](i) and a component that increased linearly with increasing [Na](i). Net influx of sodium ions in K-free solutions varied with the external sodium ion concentration, [Na](o), and...

Patients on chronic hemodialysis often portray high serum [K+]. Although dietary excesses are evident in many cases, in others, the cause of hyperkalemia cannot be identified. In such cases, hyperkalemia could result from decreased potassium removal during dialysis. This situation could occur if alkalinization of body fluids during dialysis would drive potassium into the cell, thus decreasing t...

A pot experiment was conducted at screen house of Department Soil Science, PAU, Ludhiana during rabi 2017-18 to evaluate the response wheat applied potassium. Twelve soil samples were taken from all over Punjab varying in available K. Potassium @ 0, 15, 20, 25 and 30 kg K/ha soil. The mean grain yield varied 12.39 20.13 g/pot K sufficient soils (>137 K/ha) 8.43 12.09 deficient (<137 K/ ha...

Xuancheng City is the dominant tobacco-planting area of Anhui province due to the high quality of the tobacco leaves. However, the potassium content in the tobacco leaves shows a gradual decreasing trend in recent years, which may be attributed partly to the possible low potassium content in topsoil of tobacco-planting farmland. Therefore, the content data in the year of 20052007 of rapidly ava...

THE ANTIEPILEPTIC ACTION OF DIPHENYLHYDANTOIN (DPH) HAS BEEN EXPLAINED BY TWO DIFFERENT THEORIES: (a) that DPH stimulates the Na-K pump; (b) that DPH specifically blocks the passive translocation of sodium. Since electrophysiological experiments have recently suggested abnormal synaptic mechanisms as the basis for epileptogenic discharges, the action of DPH on K transport within synaptic termin...

The title compound, K(+)·C(8)H(8)BF(3)N(3) (-), is a salt containing the chiral organic trifluorido-borate anion. The organic anions and potassium cations are tightly bound to each other by the coordination K-F [2.654 (3)-3.102 (3) Å] and K-N [2.951 (4)-3.338 (4) Å] inter-actions. Thus, the potassium cation adopts a nine-vertex coordination polyhedron, which can be described as a distorted mono...

Renal ammonium excretion is increased by potassium depletion and reduced by potassium loading. To determine whether changes in potassium concentration would alter ammonia transport in the medullary thick ascending limb (MAL), tubules from rats were perfused in vitro and effects of changes in K concentration within the physiological range (4-24 mM) were evaluated. Increasing K concentration from...

PURPOSE To test whether prostaglandin E2 (PGE2) is generated by cultured nonpigmented ciliary epithelial (NPE) cells treated with the phorbol ester, phorbol dibutyrate (PDBu), an activator of protein kinase C. In addition, the authors tested whether indomethacin, a cyclooxygenase inhibitor, influences the stimulation of active sodium-potassium transport observed in PDBu-treated cells. METHODS...

We studied the cellular membrane enzyme responsible for potassium transport in different Thai populations. We measured plasma and intraerythrocytic concentrations of sodium and potassium, activities of erythrocytic membrane Na, K-activated adenosine triphosphatase (Na, K-ATPase), ouabain-insensitive ATPase, total ATPase and the activity ratio of Na, K-ATPase/total ATPase in 25 healthy blood don...

In a recent paper (Hoagland, 1934-35) evidence was presented indicating that adaptation to pressure as measured by the failure of nerve impulses from single mechanoreceptors in frogs' skin is produced by an inhibitory neurohumor, probably containing potassium, released from cutaneous cells when they are pressed upon. The receptors are axon endings branching among the cutaneous cells. The releas...