Anwarul Islam

Antimicrobial activity and cytotoxicity of Aerva lanata

Aerva lanata whole plant showed interesting antimicrobial activities (ethyl acetate and methanol extracts) and significant cytotoxic properties (petroleum ether, ethyl acetate and methanol extracts).

Antimicrobial activity and cytotoxicity of Zanthoxylum budrunga.

The petroleum ether, chloroform and methanol extracts of the leaves and barks of Zanthoxylum budrunga have been evaluated for their antibacterial, antifungal and cytotoxic properties.

Peroxo complexes of ZrIV, ThIV, WVI and UVI ions stabilized by multidentate organic ligands

Abstract Several new peroxo complexes of zirconium, thorium, tungsten and uranium containing organic ligands, ethylenediaminetetraacetic acid and succinic acid, have been prepared. The complexes have the compositions [M(O 2 )(H 2 edta)], [M′(O)(O 2 )(H 2 edta)l and [M″(O 2 )(scac)·2L] (H 2 edta = dianion of ethylenediaminetetraacetic acid; scac = dianion of succinic acid; M = Zr IV and Th IV ; M′ = W VI and U VI ; M″ = Zr IV and Th IV ; L = OPPh 3 or OAsPh 3 ), respectively. The present complexes were found to be very stable and inert towards oxidation. The size of the metals as well as the electronic nature of the auxiliary ligands (L) influence the mode of coordination of the peroxo moiety. The frequency of the ν 1 mode of the M(O 2 ) grouping decreases with an increase in the atomic numbers of metals in a particular group and in donor strength of the ancillary ligands used.