Rechargeable proton-exchange membrane batteries that employ organic chemical hydrides as hydrogen-storage media have the potential to serve as next-generation power sources; however, significant challenges remain regarding the improvement of the reversible hydrogen-storage capacity. Here, we address this challenge through the use of metal-ion redox couples as energy carriers for battery operati...

The mode of chiral interaction between a series of asymmetric epoxides (propylene oxide, butylene oxide, epifluorohydrin and epichlorohydrin) and a chiral vanadyl salen complex, N, N'-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexane-diamino-vanadium (iv) oxide, [VO()], was investigated by a range of electron magnetic resonance techniques (EPR, ENDOR, HYSCORE) and DFT. Enantiomer discriminatio...

We examined the effects of vanadium sulfate (VOSO4) treatment at 5 and 10 mg/kg for 30 days on endocrine pancreas activity and histology in nondiabetic and STZ-induced diabetic rats. In diabetic group, blood glucose levels significantly increased while insulinemia level markedly decreased. At the end of treatment, VOSO4 at a dose of 10 mg/Kg normalized blood glucose level in diabetic group, res...

In order to explore the mechanism of action of vanadyl sulfate (VOSO4), previously described as an antidiabetic and antihypertensive agent, we have investigated the role of calcium and tyrosine phosphorylation in the contractile responses of rat aorta or skinned rabbit mesenteric artery rings. VOSO4 induced a concentration-dependent contraction of aorta (pD2 = 3.2), which was potentiated by end...

Reaction of 4-bromo-2-(((5-chloro-2-hydroxyphenyl) imino)methyl) phenol (H2L) with VOSO4 XH2O generates the oxido-vanadium(V) complex [VOL(OCH3)(OHCH3)], that characterized by FT-IR, UV–Vis, and elemental analysis. The complex was also characterized by single crystal X-ray diffraction crystallography. A DFT calculation was carried out on the complex using the B3LYP/ 6-31?G(d,p)method. The agree...

Vanadium (CAS No. 7440-62-2) is an element that exists in a number of oxidation states ranging from -1 to +5 and can be found in various locales around the world. Absorption of vanadium from the gastrointestinal tract is poor and most ingested vanadium is typically converted to vanadyl. Excretion of absorbed vanadium is primarily via urine while unabsorbed vanadium is mainly eliminated in feces...

OBJECTIVE Vanadyl sulphate, an inorganic tetravalent salt of transition metal vanadium is conventionally used to treat diabetes and by athletes as body-building supplement. Vanadyl sulphate is a constituent of many supplements and herbal preparations available over the counter in many parts of the world. In this study the efficacy of the salt as hypoglycaemic agent and its effects on lipid prof...

Human airway epithelial cells can increase expression of both lactoferrin and ferritin after exposure to catalytically active metal. These proteins transport and store metal, with coordination sites fully complexed, and therefore can diminish the oxidative stress. The intracellular transport of lactoferrin results in a transfer of complexed metal to ferritin, where it is stored in a less reacti...

We have shown previously that vanadium ions (vanadate and vanadyl) inhibit autophosphorylation of histidine but not that of serine in ATP citrate lyase (ACL). Here we report the results concerning the effect of monovanadate (+ oligomers), decavanadate as well as vanadyl on the activity of ACL of the rat liver. Susceptibility of ACL to inhibition by vanadate was rather low. Vanadate at concentra...