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Optimized arsenic, selenium and mercury determinations in aqueous solutions by energy dispersive X-ray fluorescence after preconcentration onto zirconium-loaded activated charcoal
Abstract Adsorption onto zirconium-loaded activated charcoal (ZrC ∗) allows the efficient collection of arsenic, selenium and mercury from aqueous solutions in a thin layer, and at the same timeExpand
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X-ray diffraction study of bisphosphonate metal complexes: Mg and Ca complexes of (dichloromethylene)bisphosphonic acid P,P′-diisopropyl ester
Abstract Mg(II) and Ca(II) complexes of a (dichloromethylene)bisphosphosphonic acid P , P ′-diisopropyl ester: [Na 2 Mg{Cl 2 C(PO 3 iPr) 2 } 2 (H 2 O) 4 ] n ( 1 ) and [{Ca 2 [Cl 2 C(PO 3 iPr) 2 ] 2Expand
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Crystallization and preliminary X-ray analysis of two major xylanases from Trichoderma reesei.
Two major endoxylanases, endo-beta-1,4-xylanase I and II (molecular mass 19 kDa and 21 kDa) from the filamentous fungus Trichoderma reesei have been crystallized by using ammonium sulphate as theExpand
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Separation of microgram quantities of Cr(III) and Cr(VI) in aqueous solutions and determination by energy dispersive X-ray fluorescence spectrometry
Abstract A procedure was developed for the separation and independent determination of microgram quantities of Cr(VI) and Cr(III) in aqueous solution. Cr(VI) was adsorbed onto zirconium-loadedExpand
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C4H3SSeCH2CH2OC6H5: synthesis, characterization and reaction with palladium(II) and nickel(II)
Abstract ThSeCH2CH2OPh (Th=2-thienyl, C4H3S-; Ph=phenyl) (2) has been prepared by the reaction of BrCH2CH2OPh (1) and ThSeLi. The compound was characterized by 13C{1H}- and 77Se-NMR spectroscopy andExpand
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Bis­(tri­phenyl­telluronium) hexa­chloro­tellurate
The title compound, (Ph3Te)2[TeCl6] or 2C18H15Te+·TeCl62−, was obtained as yellow hexagonal crystals from the reaction of Ph3TeCl with [(Ph3PO)2H]2[Te2Cl10]. The structure consists of discreteExpand
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(2-(Dimethylamino)indenyl)zirconium Dichlorides
Bis(2-(dimethylamino)indenyl)zirconium dichloride and rac-(ethylenebis(2-(dimethylamino)-1-indenyl))zirconium dichloride have been prepared and their molecular structures determined. Both complexesExpand
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Dehydration of theophylline monohydrate—a two step process
The physicochemical properties of theophylline monohydrate and anhydrous polymorphic form II were evaluated using crystallographic, calorimetric and computational methods. The heats of solution ofExpand
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Zirconium-loaded activated charcoal as an adsorbent for arsenic, selenium and mercury
The adsorption of arsenic, selenium and mercury from aqueous solutions onto zirconium-loaded activated charcoal was studied as a function of adsorption time, amount of adsorbent, pH, concentration ofExpand
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