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首页> 外文期刊>Nanobiotechnology, IET >Microemulsion synthesis of silver nanoparticles using biosurfactant extracted from Pseudomonas aeruginosa MKVIT3 strain and comparison of their antimicrobial and cytotoxic activities
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Microemulsion synthesis of silver nanoparticles using biosurfactant extracted from Pseudomonas aeruginosa MKVIT3 strain and comparison of their antimicrobial and cytotoxic activities

机译：使用铜绿假单胞菌MKVIT3菌株提取的生物表面活性剂微乳液合成银纳米颗粒及其抗菌和细胞毒活性比较

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摘要

In the present study, an efficient biosurfactant producing bacterial strain Pseudomonas aeruginosa MKVIT3 was isolated from an oil logging area in Vellore district of Tamil Nadu, India. Liquid chromatography–mass spectrometry (LC-MS/MS) analysis was performed for the identification of different congeners present in the extracted biosurfactant. The column purified biosurfactant was used to stabilise the formation of silver nanoparticles (NP) using borohydrate reduction in reverse micelles. The silver NP were characterised using UV-vis absorption spectroscopy, Powder-XRD TEM analysis and zeta potential. A comparative study of the antimicrobial activity and cytotoxic efficacy was done for the extracted purified biosurfactant and the silver NP. The LC-MS/MS analysis of the biosurfactant revealed the presence of five rhamnolipid congeners. The synthesised silver NP showed the characteristic absorption peak in UV-vis at 440 nm. Powder-XRD and TEM analysis revealed the average particle size of the NP as 17.89 ± 8.74 nm as well as their cubic structure. Zeta potential value of −30.9 mV suggested that the silver NPs are stable in the suspension. Comparative study of the antimicrobial activity revealed that the silver NP are more potent than the biosurfactant in inhibiting the growth of microbes. Cytotoxic activity revealed that the biosurfactant are more effective than the synthesised silver NP.
机译：在本研究中，从印度泰米尔纳德邦韦洛尔区的一个采油区中分离出一种高效的生物表面活性剂生产细菌铜绿假单胞菌MKVIT3。进行液相色谱-质谱（LC-MS / MS）分析，以鉴定提取的生物表面活性剂中存在的不同同类物。柱纯化的生物表面活性剂用于通过反胶束中的硼水合物还原来稳定银纳米颗粒（NP）的形成。使用紫外可见吸收光谱，粉末XRD TEM分析和Zeta电位对银NP进行表征。对提取的纯化的生物表面活性剂和银纳米粒进行了抗菌活性和细胞毒性功效的比较研究。生物活性剂的LC-MS / MS分析显示存在五个鼠李糖脂同类物。合成的银纳米颗粒在440 nm的紫外可见光谱中表现出特征吸收峰。粉末XRD和TEM分析显示，NP的平均粒径为17.89±8.74 nm，并且具有立方结构。 Zeta电位值为-30.9 mV，表明该银NP在悬浮液中稳定。抗菌活性的比较研究表明，银NP在抑制微生物生长方面比生物表面活性剂更有效。细胞毒活性表明，该生物表面活性剂比合成的银纳米颗粒更有效。

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