Since Henze discovered vanadium in the blood (or coelomic) cells of an ascidian in 1911, this unusual phenomenon has attracted the interest of many investigators. The highest concentration of vanadium (350 mM) in the blood cells of Ascidia gemmata, which belongs to the suborder Phlebobranchia, is 10(7) times higher than that in seawater. Of the approximately 10 types of blood cells, a combinati...

The title compound was hydrothermally synthesized from elemental vanadium, phosphoric and boric acids, and ethylenediamine. It is isostructural with the mixed-valence titanium phosphate TiTi(HPO4)4?enH?H2O (TPO-2) but differs in electronic states and in its magnetic properties. The structure [tetragonal, I41, a ~ 6.3881(4) and c ~ 16.608(1) Å] is of the open-framework type and is composed of co...

Because vanadium ions such as vanadyl (VO) and vanadate (VO3−) ions were demonstrated to normalize blood glucose levels of diabetic animals and patients, the action mechanism of vanadium treatment has been of interest. In this study, we focused on understanding interactions among trace elements in diabetic rats, in which a multitracer technique was used. The effects of vanadyl sulfate (VS)-trea...

A simple and sensitive kinetic-spectrophotometric method is described for the determination of vanadium and the possible mechanism of catalytic reaction is proposed. The method is based on the vanadium(V)-catalyzed oxidation of 1,8-diaminonaphthalene (DNA) by potassium bromate (Tiron as activator) at pH 3.8 and 40 degrees C. The reaction was monitored spectrophotometrically by measuring the inc...

Additional resources and features associated with this article are available within the HTML version: • Supporting Information • Access to high resolution figures • Links to articles and content related to this article • Copyright permission to reproduce figures and/or text from this article Supported vanadium oxides processed under ambient environments have been studied by using X-ray standing...