In this study, a series of new1,2,5-oxadiazole compounds derived from 4-chloro-7-nitro-benzo 1,2,5-oxadiazole was synthesized using different organic procedures. The resulting derivatives were chemically characterized and their structures were confirmed by FT-IR and NMR analysis. All the compounds were also evaluated for their antibacterial and antifungal activity against four types of pathogenic bacteria: S.aureus, S.epidermidis (as gram-negative bacteria), E.coli, Klebsiella spp. (as gram-positive bacteria) and the fungus Candida albicans using the agar well diffusion method.
Pyridine (L1) and 2,4-dimethylpyridine (L2) halide complexes of the type of [ML2X2] were prepared and characterized via FT-IR and 1H NMR. The CA microfibers containing complexes were electrospun and investigated via FT-IR. The morphologies of the microfibers were investigated via FE-SEM. Antibacterial activities of the complexes and the fibers were investigated.
Stable silver nanoparticles were rapidly synthesized by simple, eco-friendly atmospheric pressure plasma method using non-ionic Tween 80 (polyoxyethylene-(80)-sorbitan monooleate) as capping agent. Influences of Tween 80 concentration on the formation efficiency of silver nanoparticle, their average size and stability have been studied. The synthesized silver nanoparticles had significant antibacterial activity on two strains of Gram bacteria.
The contact non-equilibrium low-temperature plasma technique is used to synthesize silver nanoparticles (AgNPs) employing polyvinyl pyrrolidone (PVP) as a capping agent. Influences of PVP concentration on the formation efficiency of silver nanoparticle, their average size and stability have been studied. The synthesized silver nanoparticles had a significant antibacterial activity against two strains of Gram bacteria. Silver nanoparticles (AgNPs)-alginate composite beads with different PVP concentration were synthesized as materials for water purification.
A new series of methyl 4,6-O-(4-methoxybenzylidene)--D-glucopyranoside derivatives was synthesized using the direct acylation method. Methyl--D-glucopyranoside was selectively converted to methyl 4,6-O-(4-methoxybenzylidene)--D-glucopyranoside by the reaction with 4-methoxybenzaldehyde dimethylacetal in a reasonable yield. Using a wide variety of acylating agents, a series of 2,3-di-O-acyl derivatives of this product was also prepared in order to gather additional information for structure elucidation.