Ca2+-dependent K+ efflux from human erythrocytes was first described in the 1950s.
Subsequent studies revealed that a K+-specific membrane protein (the Gárdos channel) …

The concentrations of extracellular and intracellular potassium (K+) in skeletal muscle
influence muscle cell function and are also important determinants of cardiovascular and …

Nuclear magnetic resonance spectroscopy (called NMR for ex vivo techniques and MRS for
in vivo techniques) has become a useful analytical and diagnostic tool in biomedicine. In the …

Nuclear magnetic resonance (NMR) spectroscopy is a principal well-established technique
for analysis of chemical, biological, food and environmental samples. This article provides …

Revised Manuscript Received March 16, 1988 abstract: Cesium-133 NMR studies have
been carried out on suspended human erythrocytes and on perfused rat hearts in media …

The maintenance of a gradient of potassium and sodium ions across the cell membranes is
essential for the physiological function of the mammal organism. The measurement of the …

Hydrophilic quaternary ammonium compounds (QACs) include derivatives of carnitine (Car)
or choline, which are known to have essential bioactivities. Here we developed a technique …

Purpose To demonstrate the feasibility of performing 39‐potassium MR imaging of a human
brain. Methods 39‐Potassium magnetic resonance imaging of a human brain was …

Double‐quantum filtered and conventional single‐pulse sodium and potassium NMR
spectra were obtained from in situ rat brain at 7.0 T, using a surface coil. In contrast to the ca …

We have studied 87 Rb+ fluxes in the perfused rat heart using nuclear magnetic resonance
spectroscopy (NMR). A simple model for the interpretation of the data is presented. A …