ObjectiveThe present work represents the green synthesis of silver nanoparticles using Withania coagulans extract and its antibacterial property. The synergy, additive, bacteriostatic and bactericidal effect of silver nanoparticles was determined against Enterococcus faecalis, Staphylococcus aureus, Escherichia coli, Proteus vulgaris, Salmonella typhi, and Vibrio cholerae. Methods <...

In this work, we used a simple and totally green method for synthesizing silver nanoparticles using kappa-carrageenan as reducing and stabilizing agent. The beads were prepared in aqueous medium by microwave heating, and then followed by cross-linking with K+ cations without using any additional toxic and expensive chemical agents. The preparation method of the carrageenan-based beads is easy, ...

objective(s): chitosan nanoparticles (cnps) were prepared based on the ionic gelation of chitoan with anionic compounds of ocimum basilicum leaf extract. materials and methods: after addition of ocimum basilicum leaf extract to chitosan solution, the physicochemical properties of the nanoparticles were determined by field emission scanning electron microscope (fesem), fourier transform infrared...

Abstract In the present study, nanoparticles of copper and copper oxides were synthesized and their antibacterial activity was evaluated and compared with silver nanoparticles. The nanoparticles were synthesized using facile chemical reactions, and then characterized using field emission scanning microscopy. The nanoparticles were stable for at least two weeks. The...

the external and interlamellar spaces of montmorilonite (mmt) were used as solid support for synthesis of cuo nanoparticles (nps) at room temperature by the chemical reduction method. in this project, copper nitrate plus water (cu(no3)2. xh2o) and sodium hydroxide (naoh) were used as copper precursor and reducing agent respectively. then, mmt/cu2+ nanocomposites were stabilized with different r...

results low concentrations of agnps and short incubation times can have the maximum positive impact on the peroxidase activity, and in the present study the highest activity was seen at a concentration of 40 mg/l and two hours of incubation time. conclusions this study suggests that changes of enzyme activity can occur as a result of the effect of silver nanoparticles on enzyme conformation, in...

Introduction: Due to causing methemoglobinemia, different cancers, and teratogen effects in human nitrate contamination of water resources has become a critical environmental problem Therefore, the aim of this work was to determine the optimum condition of nitrate sorption onto magnetic nanoparticle. Materials and Methods: The removal of nitrate from aqueous solutions by magnetic nanoparticles...

Pt nanoparticles with tunable size are prepared on the entire surface of facet-engineered Cu2WS4 decahedral photocatalyst via a kinetic-controlled chemical reduction process. The {101} facets of the photocatalyst which featured photo-oxidation, are successfully activated for photoreduction by Pt. The resulting photocatalyst shows an activity nine times higher compared to that of the only {001}-...