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...

bimetallic pt-v supported by gamma-alumina is used to observe the changes of nheptanewhen passed over this catalyst. the pt concentration was kept constant at0.1wt% while the concentration of the vanadium was 0.5wt%. the activity andselectivity of catalyst have been determined under conditions at 450-500 degreescentigrade and 15-30 attn. the experimental results show that the addition of second...

With the excessive consumption of nonrenewable resources, exploration effective and durable materials is highly sought after in field sustainable energy conversion storage system. In this aspect, metal-organic frameworks (MOFs) are a new class crystalline porous organic-inorganic hybrid materials. MOFs have recently been gaining traction energy-related fields. Owing to coordination flexibility ...

persian gulf and its coastal areas are the world's largest source of crude oil and related industries govern the region. one of the contaminants in this area is heavy metals associated with oil spill. more importantly, vanadium, nickel and zinc can be named in this regard. in this study, the contamination of northern coasts of persian gulf is selected to investigate for trace metals of v, ni, c...

An RP-HPLC method for the separation and determination of aluminium(III), vanadium(V), iron(III), copper(II) and nickel(II) with CALKS (Chromazol KS) and PAR ([4-(2-pyridylazo)resorcinol]) chelating on a YWG-ODS column was developed. A mixture of methanol-tetrahydrofuran(THF)-water (60:5:35 v/v) containing 0.2 mol/L LiCl, 5 x 10(-5) mol/L CALKS, 5 x 10(-5) mol/L PAR and acetate buffer solution ...

Vanadium-binding proteins, or Vanabins, have recently been isolated from the vanadium-rich ascidian, Ascidia sydneiensis samea. Recent reports indicate that Vanabin2 binds twenty V(IV) ions at pH 7.5, and that it has a novel bow-shaped conformation. However, the role of Vanabin2 in vanadium accumulation by the ascidian has not yet been determined. In the present study, the effects of acidic pH ...

The chloroperoxidase (EC 1.11.1.-) from the fungus Curvularia inaequalis belongs to a class of vanadium enzymes that oxidize halides in the presence of hydrogen peroxide to the corresponding hypohalous acids. The 2.1 A crystal structure (R = 20%) of an azide chloroperoxidase complex reveals the geometry of the catalytic vanadium center. Azide coordinates directly to the metal center, resulting ...

The ion exchange resin Amberlite 958 was used to investigate its behaviour on the removal of hazardous vanadium(V) from aqueous media. This investigation carried out under various hydrodynamic conditions and chemical conditions, such as variation stirring speed, pH solution, dosage, initial in temperature. Vanadium(V) uptake onto highly dependent thus, speciation this phase; process had an endo...

V-TiO2 photocatalyst with 0 ≤ V 20 mol% was prepared via the sol–gel method based on mixed oxide titanium–vanadium nanoparticles size and composition control. The vanadium–titanium oxo-alkoxy nanonoparticles were generated in a chemical micromixing reactor, coated glass beads liquid colloid deposition underwent to an appropriate thermal treatment forming crystallized nanocoatings. X-ray diffrac...