Using ratiometric Ca2+ imaging and patch-clamp measurement of Ca2+ channel activity, we investigated Ca2+ signaling induced by vanadium compounds in Jurkat T lymphocytes and rat basophilic leukemia cells. In the presence of external Ca2+, vanadium compounds produced sustained or oscillatory Ca2+ elevations; in nominally Ca2+-free medium, a transient Ca2+ rise was generated. Vanadate-induced Ca2...

Voltammetric measurements on cells of arrangement Pt,ArusampleuYSZuAr,Pt with a very small sample mass (‘microsamples’) turned out to be a very convenient tool for the determination of thermodynamic properties of oxides. Measurements were made on Bi O , CuO and V O microsamples and on nickel and copper metal between 550 and 7008C. The 2 3 2 5 measurements on nickel were used for the calibration...

We describe a sensitive method for the determination of vanadium in biological substances by atomic absorption spectroscopy. By using background correction and pyrolytically coated graphite tubes with flameless apparatus, this vanadium assay has a sensitivity of 65 pg and a detection limit of 30 pg, approximately sixfold more sensitive than previously reported assays involving this technique. T...

For over one hundred years it has been known that vanadium exerts an influence on glucose metabolism in humans. Why this influence or effect exists has only been partly elucidated. Furthermore adapting this effect in the treatment of disease has yet to be seized upon successfully. The purpose of this paper is to look at vanadium and its proposed mechanism of action as well as to review many of ...

Some ascidians (sea squirts) accumulate the transitional metal vanadium in their blood cells at concentrations of up to 350 mM, about 10(7) times its concentration found in seawater. There are approximately 10 different types of blood cell in ascidians. The identity of the true vanadium-containing blood cell (vanadocyte) is controversial and little is known about the subcellular distribution of...

Redox-flow batteries are relevant to store energy from intermittent sources such as solar panels or wind turbines, thereby smoothing their supply. Up now, most redox-flow based on vanadium. Vanadium is a rare and expensive material, thus recent research has focused organic compounds and, in particular, anthraquinones electroactive materials. However, the tunability of chemistry poses needle-in-...