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719Adina ROTAR, Ancuta COVACI,Alexandra POP and Anca SILVESTRUNew triarylphosphane chalcogenides. Crystal andmolecular structure of [2-(Me 2 NCH 2) C 6 H 4 ] 3 P=E(E = S, Se) and [2-(Me 2 NCH 2 )C 6 H 4 ] 2 PhP=SRev. Roum. Chim., 2010, 55(11-12), 823-829Valentin ZAHARIA, ManuelaCURTICAPEAN,Nicolae PALIBRODA, Mircea VLASSA andAnca SILVESTRUKey words: triarylphosphane chalcogenides, crystal and molecular structure,NMR spectroscopyHeterocycles 22. Synthesis, characterization andevaluation of antimicrobial potential of some newsulfonylhydrazino-thiazolesRev. Roum. Chim., 2010, 55(11-12), 831-841Key words: sulfonylhydrazinothiazoles, acylation reaction, structuralcharacterization, antimicrobialDan RUSU, Oana BĂBAN, Ioan HAUER,Delia GLIGOR, Leontin DAVID andMariana RUSUSynthesis and characterization of the potassium11-tungstovanado(IV) phosphateRev. Roum. Chim., 2010, 55(11-12), 843-850Lidia VARVARI and Ionel Cătălin POPESCUKey words: polyoxometalate, vanadium(IV), electronic spectroscopies,vibrational spectroscopy, cyclic voltammetry0.4New method for antioxidant activity evaluationusing a H 2 O 2 amperometric sensorI (mA)0.20.0-0.2-0.4-0.6-0.7 0.0 0.7 1.4E (V/Ag/AgCl,Cl - sat)Rev. Roum. Chim., 2010, 55(11-12), 851-857Codruţa VARODI, Ocsana AXUC,Sorina CIORCERI, Delia GLIGOR,Ionel Cătălin POPESCU andLiana Maria MUREŞANBiosensor based on ascorbate oxidase for ascorbicacid determinationKey words: Prussian Blue, H 2 O 2 detection, ascorbic acid, antioxidant activityS / µA M -13002001003202.50U AOx / cm -2640 1.25% GARev. Roum. Chim., 2010, 55(11-12), 859-864Key words: ascorbic acid, ascorbate oxidase, oxygen electrode,amperometric biosensor