Biologically active nickel(ll), copper(ll) and zinc(ll) chelates with thiazole-derived nitro- and chlorosalicylaldehyde Schiff-bases having the same metal ion but different anions, e.g. nitrate, sulfate, oxalate and acetate have been synthesized and characterized on the basis of their physical, spectral and analytical data. In order to evaluate the possible participating role of anions on the a...

1Instituto de Química, Departamento de Química Analítica, UNESP, CP 355, 14800-900 Araraquara,SP, BRAZIL 2Centro de Energia Nuclear na Agricultura-USP, 13416-000, Piracicaba, SP,BRAZIL 3Instituto de Biociências, Departamento de Física e Biofísica, UNESP, CP 510, 18618-000, Botucatu, SP, BRAZIL 4Instituto de Biociências, Departamento de Química e Bioquímica, UNESP, CP 510, 18618-000, Botucatu, S...

CTX-M-19 is a recently identified ceftazidime-hydrolyzing extended-spectrum beta-lactamase, which differs from the majority of CTX-M-type beta-lactamases that preferentially hydrolyze cefotaxime but not ceftazidime. To elucidate the mechanism of ceftazidime hydrolysis by CTX-M-19, the beta-lactam MICs of a CTX-M-19 producer, and the kinetic parameters of the enzyme were confirmed. We reconfirme...

New some Schiff bases and their Co(II), Ni(II) and Cu(II) complexes formed by the condensation of 2-acetonaphthone with 2-Amino-4-chlorophenol (AACP), 2-amino-4methylbenzothiazole (AABT) and 2-aminothiazole (ACAT). These compounds have been characterized by elemental analysis, FT-IR, FAB-mass, molar conductance, electronic spectra, ESR and magnetic susceptibility. FAB-mass data show degradation...