Introduction Factitious normokalaemia The physical chemical determination of plasma potassium concentration is very precise. However, the matrix where potassium is determined, the plasma, is a notoriously unreliable partner. This fact is generally recognized when patients with hyperkalaemia are considered. Because potassium concentrations are 20-fold higher within the cell than outside, the pot...

potassium is an essential plant macronutrient. various microorganisms including bacteria and fungi, algae, yeast and mosses are able to decompose silicate minerals and to dissolve nutrient such as k, fe, zn and si. aamong them bacteria are more important. the aim of this study was to determine the ability of microbial populations for releasing soil potassium. this study was carried out as a fac...

experiments were conducted in 1998 and 1999 to study the effects of different levels of potassium and irrigation intervals on yield and water use efficiency of two genotypes of sugar beet (a37.1 and 12681) in khorasan agricultural research center (torogh, iran). potassium levels were; no potassium application, increasing potassium to 5% of soil cation exchange capacity (cec) and second treatmen...

The combination of an aldosterone receptor antagonist added to an angiotensin-converting enzyme inhibitor has been demonstrated to reduce cardiovascular and renal end points in hypertensive humans but can produce hyperkalemia in the common clinical setting of impaired renal function. We investigated the effects of dual therapy on acute and chronic potassium handling in hypertensive humans with ...

We investigated the capacity of newborn rats to excrete an acute potassium load to understand the development of a renal potassium excretion system. Three groups of the rats (7-14 d) were used to collect urine periodically over 6 h after oral infusion of potassium: control (no potassium loading) and low- and high-potassium-loaded rats. In the low-potassium-loaded group, infused with about 0.6 m...

Addisonian patients can maintain potassium homeostasis despite the absence of mineralocorticoid. The present in vitro microperfusion studies examine what role the cortical collecting tubule might play in this process. All studies were performed on tubules harvested from adrenalectomized rabbits, which were maintained on 0.15 M NaCl drinking water and dexamethasone 50 mug/d. Perfusion and bath s...

Total body potassium content and proper distribution of potassium across the cell membrane is of critical importance for normal cellular function. Potassium homeostasis is maintained by several different methods. In the kidney, total body potassium content is achieved by alterations in renal excretion of potassium in response to variations in intake. Insulin and beta-adrenergic tone play critic...

Patients prescribed liposomal-amphotericin B (L-AMB) frequently require supplemental potassium to prevent hypokalemia. The aim of this retrospective study was to examine the appropriate potassium supplementation conditions to treat hypokalemia induced by L-AMB. The subjects were 100 hematological patients who received L-AMB for the first time between April 2012 and March 2013. A total of seven ...

Both selective and nonselective cyclooxygenase (COX) inhibitors can reduce potassium excretion and can produce or exacerbate hyperkalemia.1–12 We investigated whether there is a difference between the effects of nonselective COX-1/ COX-2 inhibitors and selective COX-2 inhibitors on provoked dynamic renal potassium excretion. We apply a mixed-effects model statistical approach that allows invest...

KAMM, DONALD E., AND GERALD L. STROPE. Glutamine and glutamate metabolism in renal cortex from potassium-depleted rats. Am. J. Physiol. 224(6) : 1241-1248. 1973.-Both potassium depletion and acidosis increase renal ammonia production. In the present experiments, the metabolism of glutamine and glutamate by renal cortex slices from potassium-depleted rats has been compared with that previously f...