MCAFEE, ROBERT D. AND WILLIAM LOCKE. Effects of certain steroids on bioelectric current of isolated frog skin. Am. J. Physiol. 2044): 797-0oo* I 96 I .--n-methyl-g cu-fluorohydrocortisone and hydrocortisone sodium succinate increase both the rate and duration and, therefore, total quantity of ion transported in the isolated short-circuited frog skin measured over a 24. hour period. The ion tran...

Electrode potential measurements have been applied to study electrical characteristics like transport numbers, permselectivity & fixed charge density of ion-exchange membranes. Membrane potential measurements were made across zirconium phosphotungstate cation-exchange membrane maintained at 27◦C, using halide salts of alkali & alkaline earth metals as electrolytes. The effect of concentration o...

The ion transport activity of calix[4]arene tetrabutylamide 1,3-alt 2 was studied in liposomes, planar lipid bilayers, and HEK-293 cells. These experiments, when considered together with (1)H NMR and X-ray crystallography data, indicate that calix[4]arene tetrabutylamide 2 (1) forms ion channels in bilayer membranes, (2) mediates ion transport across cell membranes at positive holding potential...

Both calcium and strontium could be transported actively from erythrocytes if adenosine triphosphate, guanosine triphosphate, or inosine triphosphate were included in the hypotonic medium used to infuse calcium or strontium into the cells. Acetyl phosphate and pyrophosphate were not energy sources for the transport of either ion. Neither calcium nor strontium transport was accompanied by magnes...

Anatase TiO2 is a stable, cheap, non-toxic and environmentally benign candidate for use as an anode active material for lithium ion batteries (LIB). Due to the comparably high lithium insertion potential of around 1.8 V vs. Li/Li, typical battery electrolytes can be used in their thermodynamic stability window. Anatase offers high capacity and high cycling stability, and due to the oxidic frame...

The final adjustment of renal sodium and calcium excretion is achieved by the distal nephron, in which transepithelial ion transport is under control of various hormones, tubular fluid composition, and flow rate. Acquired or inherited diseases leading to deranged renal sodium and calcium balance have been linked to dysfunction of the distal nephron. Diuretic drugs elicit their effects on sodium...

A facile supported liquid membrane (SLM) system for the selective and efficient transport of silver ion is introduced. The SLM used is a thin porous polyvinyldifluoride membrane impregnated with hexathia-18-crown-6 (HT18C6) dissolved in nitrophenyloctyl ether. HT18C6 acts as a specific carrier for the uphill transport of Ag+ ion as its picrate ion paired complex through the SLM. In the presence...

Studies of ion transport pathophysiology in hematological disorders and tests of possible new therapeutic agents for these disorders have been carried out in various mouse models because of close functional similarities between mouse and human red cells. We have explored strain-specific differences in erythrocyte membrane physiology in 10 inbred mouse strains by determining erythrocyte contents...

The identification of any enzyme in broken cells as a participant in membrane transport has not been reported. In this paper an enzymatic activity has been so identified through a demonstration that an unusual constellation of characteristics is common to it and to a transport system. Evidence is presented that an adenosine triphosphatase in broken human erythrocyte membranes is a part of the s...

Multiscale gyrokinetic turbulence simulations with the real ion-to-electron mass ratio and β value are realized for the first time, where the β value is given by the ratio of plasma pressure to magnetic pressure and characterizes electromagnetic effects on microinstabilities. Numerical analysis at both the electron scale and the ion scale is used to reveal the mechanism of their cross-scale int...