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首页> 外文期刊>Pakistan journal of botany >Phytosynthesis of silver nanoparticles from A. jacquemontii extract, their characterization and antimicrobial potential
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Phytosynthesis of silver nanoparticles from A. jacquemontii extract, their characterization and antimicrobial potential

机译：来自A.Jacquemontii提取物的银纳米粒子的植物合成，其特征和抗微生物潜力

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摘要

The present study investigates synthesis of silver nano-particles from the methanolic extract of A. jacquemontii tubers. Based on visual monitoring of color change from colorless / very light yellow to brown/yellowish brown indicated Ag-metal reduction and synthesis of AgNPs. UV-vis Spectrophotometric analysis indicated that solution containing 1:5 ratios (1ml AgNO 3 solution and 5ml extract) produced maximum amount of stableAgNPs. AgNPs were most stable at 1mM NaCl, comparatively moderate stable at 0.5M NaCl and relatively least stable at 1M NaCl concentration. The AgNPs samples heated up to 80-100°C temperature were less stable than the AgNPs collected at 20-40°C temperature range thus suggesting higher stability of AgNPs at lower temperatures. XRD studies revealed that synthesized AgNPs were crystalline in nature with 14.12 nm average size. FTIR analysis suggested the possible involvement of alkenes, ethers and carboxylic acid / phenol functional groups containing compounds in the reduction and capping of Ag-metal and AgNPs. Antimicrobial potential of silver NPs indicated that P. aeruginosa was highly susceptible while K. pneumoniae was the most resistant microbe. E. coli, C. albicans, S. aureus and X. campestris showed moderate sensitivity to AgNPs.
机译：本研究研究了来自A.Jacquemontii块茎的甲醇提取物的银纳米颗粒的合成。基于从无色/非常浅黄色的颜色变化的视觉监测到棕色/黄褐色表明Ag-Metal减少和AgNP的合成。 UV-Vis分光光度分析表明，含有1：5比率（1ml AgNo 3溶液和5ml提取物）的溶液产生了最大量的斯贝蒂氏菌。 AgNP在1mm NaCl下最稳定，在0.5M NaCl下相对温和，并且在1M NaCl浓度下相对最少稳定。加热至80-100℃温度的AgNP样品比在20-40℃的温度范围内的agnps稳定，因此表明在较低温度下的agnps稳定性较高。 XRD研究表明，合成的AgNP与14.12nm平均尺寸的结晶。 FTIR分析表明，烯烃，醚和羧酸/酚官能团的可能涉及含有化合物的含量在Ag - 金属和AgNP的减少和封盖中。银NPS的抗菌潜力表明，P.铜绿假单胞菌在K.Pneumoniae是最抗性的微生物中非常敏感。大肠杆菌，C. albicans，金黄色葡萄球菌和X. Campestris对Agnps表现出中度敏感性。

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