High-chromium vanadium residue (HCVR (HCVR: high-chromium residue)) is an important secondary resource of valuable metals such as (V), chromium (Cr), and molybdenum (Mo). The mainstream technology for the utilization HCVR, Na2CO3-assisted-roasting–water-leaching method, usually requires roasting temperatures more than 800 °C results in synchronous leaching Cr with V Mo. This makes subsequent se...

Some ascidians accumulate vanadium in vanadocytes, which are vanadium-containing blood cells, at high levels and with high selectivity. However, the mechanism and physiological significance of vanadium accumulation remain unknown. In this study, we isolated novel proteins with a striking homology to glutathione transferases (GSTs), designated AsGST-I and AsGST-II, from the digestive system of t...

Vanadium biological studies often disregarded the formation of decameric vanadate species known to interact, in vitro, with high-affinity with many proteins such as myosin and sarcoplasmic reticulum calcium pump and also to inhibit these biochemical systems involved in energy transduction. Moreover, very few in vivo animal studies involving vanadium consider the contribution of decavanadate to ...

INTRODUCTION Treatment of osteoporotic fractures is still challenging and an urgent need exists for new materials, better adapted to osteoporotic bone by adjusted Young's modulus, appropriate surface modification and pharmaceuticals. MATERIALS AND METHODS Titanium-40-niobium alloys, mechanically ground or additionally etched and titanium-6-aluminium-4-vanadium were analyzed in combination wit...

As lipid peroxidation and oxidative stress play a key role in the pathogenesis of diabetes, the antioxidant status of streptozotocin induced diabetic rats, treated with vanadium complex was explored in the present study. Diabetes was induced by single intraperitoneal injection of streptozotocin (STZ) at the dose rate of 45 mg per kg body weight. Diabetes was confirmed after 72 hours of STZ inje...

Vanadium K-edge x-ray absorption spectroscopy (XAS) was used to examine whole blood preparations from the tunicates Ascidia nigra and Ascidia ceratodes. Each XAS spectrum exhibits a rising edge inflection near 5480 eV characteristic of vanadium(III) and an intensity maximum at 5484.0 eV. In A. ceratodes blood cells, intrinsic aquo-VSO4+ complex ion is indicated by an inflection feature at 5476 ...

The ubiquity of vanadium oxo complexes in the V+ and IV+ oxidation states has contributed to a comprehensive understanding of their electronic structure and reactivity. However, despite being predicted to be stable by ligand-field theory, the isolation and characterization of a well-defined terminal mononuclear vanadium(III) oxo complex has remained elusive. We present the synthesis and charact...

The use of different vanadium sources in the synthesis multi-metal MoVTeNb oxide catalysts has been investigated for their effect on physicochemical properties catalysts. Metal oxides were synthesized by slurry method assisted with a microwave irradiation. Vanadium pentoxide (V2O5), vanadyl sulphate (VOSO4) and ammonium metavanadate (NH4VO3) used as sources, respectively. X-ray diffraction (XRD...

Vanadium phosphorus oxides (VPO) has been applied as a heterogeneous catalyst in gas phase oxidation reactions and its application is very limited in liquid phase. In this study a series of cobalt-doped vanadium phosphorus oxides (VPO-Co) catalysts with different loading of Co (0.01-1.0 mol ratio of Co/V) were prepared. Oxidation of benzyl alcohol was studied in the liquid phase over VPO and VP...

A large number of studies has been published proposing a range of vanadium containing compounds as potential new anti-diabetic drugs due to the observed insulin mimetic function of V(IV) complexes. Vanadium uptake and distribution within the body have been investigated in animal models by determination of total vanadium concentrations. Phase I and phase IIa human clinical trials have been compl...