conclusions it was shown that the removal efficiency of nitrate was directly proportional to the amount of chaff, temperature, and contact time but inversely to the ph. this study showed that nitrate removal by chaff is a promising technique. results the result of this study revealed that chaff as an absorbent could remove nitrate from solutions, and the efficiency of adsorption increased as co...

A systematic study into the effects of metal substitution on the visible-light photocatalytic activity of prototype metal oxide cluster anions is presented. Four isostructural Lindqvist clusters [V(x)M(6-x)O19]((2+x)-) (M = W, Mo, x = 1, 2) with photooxidative activity in the visible range are reported. It is shown that the photooxidative performance correlates with the number of vanadium atoms...

Polyoxomolybdates form an interesting class of inorganic materials, which exhibit a wide range of intriguing architectures [1]. They also have a great potential for applications based on their interesting physical behavior, e. g. in catalysis, for electrical conduction, optical response, and magnetism [2]. Many of these organic-inorganic hybrid molybdates are synthesized in the presence of orga...

The selective and simultaneous ion-exclusion chromatography (IEC) with UV-detection on a weakly acidic cation-exchange resin column in the H+ -form (TSKgel Super IC-A/C) was developed and applied for the simultaneous determination of phosphate and silicate ions as the water quality parameters required for optimizing the water-leaching process for ceramics glaze raw materials of natural origin i...

Membrane transport proteins (transporters and ion channels) have been extensively expressed in amphibian oocytes. The aims of this study were to determine whether oocytes from the cane toad Bufo marinus could be used as an alternative expression system to the broadly used Xenopus laevis oocytes. mRNAs encoding plasma membrane transporters NaSi-1 and sat-1 (sulphate transporters), NaDC-1 (dicarb...

The performance of Mo-enriched, bulk ferric molybdate, employed commercially for the industrially important reaction of the selective oxidation of methanol to formaldehyde, is limited by a low surface area, typically 5-8 m(2) g(-1). Recent advances in the understanding of the iron molybdate catalyst have focused on the study of MoOx@Fe2O3 (MoOx shell, Fe2O3 core) systems, where only a few overl...

In order to reduce phosphorus pollution, the low passivation process on Q235 steel was studied. The electrochemical method used test corrosion resistance of sodium molybdate passivation. polarization curve shows that current sample passivated by is only 1/4 blank sample. Under scanning electron microscopy, film obtained treatment had lowest content and more uniform compact. XPS (X-ray photoelec...

During the screening for Rhodobacter capsulatus mutants defective in xanthine degradation, one Tn5 mutant which was able to grow with xanthine as a sole nitrogen source only in the presence of high molybdate concentrations (1 mM), a phenotype resembling Escherichia coli mogA mutants, was identified. Unexpectedly, the corresponding Tn5 insertion was located within the moeA gene. Partial DNA sequ...

Praseodymium calcium dimolybdenum hepta-oxide, Pr(1.37)Ca(0.63)Mo(2)O(7), crystallizes in the cubic pyrochlore-type structure. In the crystal structure, MoO(6) octa-hedra are linked together by common corners, forming a three-dimensional [Mo(2)O(6)] network. The Pr and Ca atoms and the remaining O atoms are located in the voids of the [Mo(2)O(6)] network. The Pr and Ca atoms are distributed sta...