METHODS A 2.8M phosphate buffer is prepared by dissolving 21.7 Gm. dibasic potassium phosphate (K2HPO4) and 16.9 Gm. monobasic potassium phosphate (KH2PO4) in distilled water free of CO2. The volume is adjusted to 100 ml. To 1.8 ml. of this buffer, 20 mg. of sodium hydrosulfite (Na2S2O4) and 0.2 ml. of buffered hemolysate (3) are added in a small test tube. After 15 minutes or longer the mixtur...

The concentrations of nutrients in the leaves allow a better understanding nutritional status oil palm plants, making it tool for diagnosing origins problems and assisting fertilizer recommendations. In this sense, objective current research was to evaluate leaf N, P, K, Ca, Mg S under fertilization with phosphate, potassium magnesium edaphoclimatic conditions Eastern Amazon. experiment conduct...

Mycorrhizal associations are known to improve the hydro-mineral nutrition of their host plants. However, the importance of mycorrhizal symbiosis for plant potassium nutrition has so far been poorly studied. We therefore investigated the impact of the ectomycorrhizal fungus Hebeloma cylindrosporum on the potassium nutrition of Pinus pinaster and examined the involvement of the fungal potassium t...

introduction: citrus are one of the important orchard fruit production that after banana is second in production at the world level and every year, chemical fertilizers having most important role in increasing crops productions, but in long application of fertilizers cause soil destructions and polluting underground water. also soils of dry regions are very poor in organic matter level. nowaday...

Exo-polysaccharides like dextran produced by Weissella sp. have a wide range of applications in the food, pharmaceutical and other industries. This biopolymer and its derivatives like iron dextran, clinical dextran are rapidly emerging as a new and industrially important products. Dextran a polymer of glucose is produced using sucrose rich media with nitrogen source. It also requires efficient ...

Physiological ligands of (sodium-potassium)-dependent adenosine triphosphatase influenced the sensitivity of the enzyme to the inhibitor, ouabain. Phosphorylation of the native enzyme is accelerated by sodium ions, while potassium ions accelerate dephosphorylation. Exposure of the phosphoenzyme to ouabain slowed its turnover and rendered it insensitive to potassium ion. This action of ouabain d...

Sodium salicylate was administered to anesthetized dogs in doses sufficient to produce concentrations in plasma comparable to those common in human salicylate toxicity. Salicylate administration increased the rates of excretion of water, sodium, and chloride in the urine. Salicylate administration also increased the rate of excretion of potassium so that its clearance often exceeded that of cre...

The concentrations of sodium, potassium, magnesium, cal cium, chloride, and phosphate were determined in Ehrlich ascites tumor cells and fluid after 5, 7, 9, and 12 days of growth. Material obtained after the 12th day showed peculiar intra cellular ion patterns, presumably related to the near-terminal condition. Material drawn after 5-9 days of growth represented viable cells. The intracellular...