Biogenesis of antibacterial silver nanoparticles using the endophytic bacterium Bacillus cereus isolated from Garcinia xanthochymus

作     者：Swetha Sunkar C Valli Nachiyar 

作者机构：Department of BiotechnologySathyabama University 

出 版 物：《Asian Pacific Journal of Tropical Biomedicine》 (亚太热带生物医学杂志（英文版）)

年 卷 期：2012年第2卷第12期

页      面：953-959页

学科分类：0710[理学-生物学] 1007[医学-药学(可授医学、理学学位)] 100705[医学-微生物与生化药学] 07[理学] 071005[理学-微生物学] 10[医学] 

主　　题：Endophytic bacteria Bacillus cereus Silver nanoparticles UV-Vis spectra SEM TEM Antibacterial activity 

摘      要：Objective:To synthesize the ecofriendly nanoparticles,which is viewed as an alternative to the chemical method which initiated the use of microbes like bacteria and fungi in their ***:The current study uses the endophytic bacterium Bacillus cereus isolated from the Garcinia xanthochymus to synthesize the silver nanoparticles(AgNPs).The AgNPs were synthesized by reduction of silver nitrate solution by the endophytic bacterium after incubation for 3-5 d at room *** synthesis was initially observed by colour change from pale white to brown which was confirmed by UV-Vis *** AgNPs were further characterized using FTIR,SEM-EDX and TEM ***:The synthesized nanoparticles were found to he spherical with the size in the range of 20-40 nm which showed a slight *** energy-dispersive spectra of the nanoparticle dispersion confirmed the presence of elemental *** AgNPs were found to have antibacterial activity against a few pathogenic bacteria like Escherichia coli,Pseudomonas aeruginosa,Staphylococcus aureus,Salmonella typhi and Klebsiella ***:The endophytic bacteria identified as Bacillus cereus was able to synthesize silver nanoparticles with potential antibacterial activity.