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首页> 外文期刊>Arabian Journal for Science and Engineering >In Vitro Antimicrobial Activity and Metal Ion Sensing by Green Synthesized Silver Nanoparticles from Fruits of Opuntia Ficus Indica Grown in the Abha Region, Saudi Arabia
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In Vitro Antimicrobial Activity and Metal Ion Sensing by Green Synthesized Silver Nanoparticles from Fruits of Opuntia Ficus Indica Grown in the Abha Region, Saudi Arabia

机译：绿色合成的银纳米粒子的体外抗菌活性和金属离子感测，来自沙特阿拉伯艾卜哈地区种植的仙人掌榕果实

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We developed a green, inexpensive and simple method for the synthesis of silver nanoparticles from the Opuntia Ficus (OF) Indica fruit juice. The synthesized AgNPs were used as sensor for the detection of toxic metal (Hg2+) using colorimetric technique as well as to investigate the antimicrobial activities against number of clinical isolates of human microbes. The synthesized AgNPs nanoparticles were characterized using UV-Vis spectroscopy, FTIR spectroscopy, scanning electron microscopy and EDX methods. The green synthesized AgNPs showed surface plasmon resonance absorption band at 441 nm, which confirm the formation of AgNPs that were also established by FTIR and EDX analyses. The colour of AgNPs changes from blood red to white in the presence of Hg2+ only, which can be differentiated and detected by the naked eye within few seconds without the prerequisite of surface amendment from other metals (Co, Ni, Fe, Mn, Pb, Zn, Cr). A good linear response (R-2 = 0.97) was obtained towards Hg2+ ions in the concentration range of 10(-3) to 10(-8) M. In addition, all growth of the tested microbial stains ceased in varied range. OFAg-2 had the highest inhibition effect followed by OFAg-1, while OF did not show any antimicrobial activities. Candida albican and Klebsiella pneumonia are the most susceptible microbes by OFAg-2 and OFAg-1 respectfully. Klebsiella oxytocam, Proteus mirabilis and Klebsiella oxytoca had the moderate susceptibility from OFAg-2 and OF, while Staphylococcus aureus was found to be the lowest susceptible microbes. Therefore, OFAg-2 and OFAg-1 probably could be promising pharmaceutical agents against many microbial strains.
机译：我们开发了一种绿色，廉价且简单的方法，可以从仙人掌榕（OF）juice汁中合成银纳米颗粒。合成的AgNPs用作比色技术检测有毒金属（Hg2 +）的传感​​器，并研究其对人类微生物临床分离株数量的抗菌活性。利用紫外-可见光谱，FTIR光谱，扫描电子显微镜和EDX方法对合成的AgNPs纳米颗粒进行了表征。绿色合成的AgNPs在441 nm处显示表面等离子体共振吸收带，这证实了FTIR和EDX分析也建立了AgNPs的形成。仅在存在Hg2 +的情况下，AgNP的颜色从血红色变为白色，可以在几秒钟内用肉眼区分并检测到，而无需与其他金属（Co，Ni，Fe，Mn，Pb，锌，铬）。在10（-3）至10（-8）M的浓度范围内，对Hg2 +离子具有良好的线性响应（R-2 = 0.97）。此外，所测试微生物污渍的所有生长都在不同范围内停止。 OFAg-2具有最高的抑制作用，其次是OFAg-1，而OF没有显示任何抗菌活性。白念珠菌和克雷伯菌肺炎分别是OFAg-2和OFAg-1最易感的微生物。产氧克雷伯菌，变形杆菌和产酸克雷伯菌对OFAg-2和OF的敏感性中等，而金黄色葡萄球菌是最不易感染的微生物。因此，OFAg-2和OFAg-1可能是对抗许多微生物菌株的有前途的药物。

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