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首页> 外文期刊>Nanobiotechnology, IET >Green synthesis, characterisation and biological evaluation of AgNPs using Agave americana, Mentha spicata and Mangifera indica aqueous leaves extract
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Green synthesis, characterisation and biological evaluation of AgNPs using Agave americana, Mentha spicata and Mangifera indica aqueous leaves extract

机译：龙舌兰，薄荷，芒果叶片的水提取物对AgNPs的绿色合成，表征和生物学评价

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摘要

The current study was performed to synthesize stable, eco-friendly and bio-compatible silver nano-particles (AgNPs) of Agave americana, Mentha spicata and Mangifera indica leaves and to screen them for biological activities. The ultraviolet-visible spectroscopic analysis revealed that λ-max for AgNPs range from 350-500 nm. All AgNPs possessed polycrystalline structure as notified as intense graphical peaks in complete spectrum of 20 values ranging from 10-80° in X-ray diffraction measurements and supported by scanning electron microscopy data. The size of the nano-particles was confirmed by transmission electron microscopy (30-150 nm). Mass loss at variable temperatures was evaluated by simultaneous thermogravimetric and differential thermal analysis revealed reduction in mass and activity of compounds was notified by temperature increase from 200 to 800 °C, thus concluding it as thermally sensitive compounds. A. americana AgNPs showed significant (96%) activity against Methicillin resistant Staphylococcus aureus, Escherichia coli (95%) and Fusarium oxysporum (89%). Good antioxidant activity was shown by M. spicata AgNPs at 300 μl (79%). M. indica AgNPs showed significant phytotoxic activity (88%) at highest concentration. No haemagglutination reaction was observed for the test samples. The above results revealed that AgNPs synthesized from selected plant species possesses significant antimicrobial and phytotoxic effect.
机译：进行当前的研究是为了合成龙舌兰，薄荷和芒果叶的稳定，生态友好和生物相容性的银纳米颗粒（AgNPs），并筛选它们的生物活性。紫外可见光谱分析表明，AgNPs的λ-max在350-500 nm之间。所有AgNP都具有多晶结构，如X射线衍射测量中20-值的完整光谱中10-80°范围内的强烈图形峰所示，并由扫描电子显微镜数据支持。纳米颗粒的尺寸通过透射电子显微镜（30-150nm）确认。通过同时进行热重分析和差示热分析来评估在可变温度下的质量损失，结果表明，温度从200到800°C升高，化合物的质量和活性降低，因此被认为是热敏化合物。 A. americana AgNPs对耐甲氧西林的金黄色葡萄球菌，大肠杆菌（95％）和尖孢镰刀菌（89％）表现出显着的活性（96％）。 300 mg（79％）的M. spicata AgNPs显示出良好的抗氧化活性。在最高浓度下，印度.MNPs表现出显着的植物毒性活性（88％）。对于测试样品未观察到血凝反应。以上结果表明，从选定的植物物种合成的AgNP具有显着的抗微生物和植物毒性作用。

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