Potassium-ion Exchange on α-Hafnium Phosphate

Gadolinium-hydrogen Ion Exchange on Zirconium Phosphate

Dependence of potassium ion and sodium ion exchange on light in the crayfish retina.

The exchange (release resp. uptake) of K+, Rb+, and Na+ ions in the isolated retina of the crayfish Astacus leptodactylus with the surrounding medium was measured using flame photometry and radioisotopic techniques. 1. The net release of K+ into a Na+ and K+ free, choline containing medium, as measured by means of flame photometry, is increased by illumination. 2. The release of 86Rb+, used as ...

Regulation of D-fructose 1-phosphate kinase by potassium ion.

Purified Aerobacfer aerogenes D-fructose l-phosphate kinase (ATP:n-fructose l-phosphate 6-phosphotransferase), an enzyme which does not exhibit cooperative kinetics, was activated by K+, Rb+, and NH,+, inhibited by Li+, and not significantly aEected by Naf or Cs+. The enzyme exhibited some activity when assayed in tetramethylammoniumglycylclycine buffer even in the absence of other monovalent c...

Synthesis of adenosine triphosphate and exchange between inorganic phosphate and adenosine triphosphate in sodium and potassium ion transport adenosine triphosphatase.

Radioactive adenosine triphosphate was synthesized transiently from adenosine diphosphate and radioactive inorganic phosphate by sodium and potassium adenosine triphosphatase from guinea pig kidney. In a first step, K+-sensitive phosphoenzyme was formed from radioactive inorganic phosphate in the presence of magnesium ion and 16 mM sodium ion. In a second step the addition to the phosphoenzyme ...

A comparison study on corrosion behavior of zinc phosphate and potassium zinc phosphate anticorrosive pigments

In this article, the effect of potassium on structure and anticorrosion properties of zinc phosphate pigments has been investigated. The co-precipitation method was selected as synthesis method of potassium zinc phosphate pigment. Then the synthesized pigment was characterized by x-ray diffraction XRD, Fourier transform infrared FTIR and Raman spectroscopy. Morphology of the powders was investi...