中文摘要：本研究旨在探讨用绿茶和红茶提取物环保合成铁（Fe）、铜（Cu）和银（Ag）纳米粒子。然后用SEM、FTIR、EDX和UV/Vis光谱技术表征了合成的NPs，评估了NPs对甲氧西林和万古霉素抗性金黄色葡萄球菌的抗细菌活性，研究了其抗黄曲霉和寄生真菌类属的抗真菌活性。研究表明合成的NPs能有效地用作多药耐药致病菌的替代抗细菌/真菌剂。此外，这些金属NPs可以用作人类食品及动物饲料如水稻、小麦、玉米、红辣椒以及禽类饲料可能的黄曲霉毒素吸附剂。
外文摘要：The present study was aimed to account an eco-friendly synthesis of iron (Fe), copper (Cu) and silver (Ag) nanoparticles (NPs) using green tea and black tea leaves extracts. Synthesized NPs were characterized using SEM, FTIR, EDX and UV/Vis spectroscopy techniques. Antibacterial activity of NPs was assessed against methicillin- and vancomycin-resistance Staphylococcus aureus strains. Antifungal activity was investigated against Aspergillus flavus and A. parasiticus fungal species. Adsorbent capability with aflatoxin B1 (AFB1) was also assessed in solution. Ag-NPs showed superior antibacterial/antifungal activities and reduced the aflatoxins production in comparison to Fe-NPs and Cu-NPs. Adsorption capability of all NPs with AFB1 contamination was found in the order of Fe-NPs > Cu-NPs > Ag-NPs. The equilibrium data showed the favorability of Langmuir isotherm with the adsorption capacity (131–139 ng/mg), Cu-NPs (114–118 ng/mg) and Ag-NPs (110–115 ng/mg). Thermodynamic parameters and kinetic studies revealed that adsorption process is spontaneous, endothermic and followed the pseudo-second order. These results suggest that the synthesized NPs could be effectively utilize as an alternative antibacterial/antifungal agent against diseases caused by multiple drug resistant pathogens. In addition, these metal NPs may be utilize as a possible aflatoxins adsorbent in human food and animal feed such as rice, wheat, maize, red chillies and poultry feed.
外文关键词：Green synthesis；Metal nanoparticles；Antibacterial；Antifungal；Adsorption
作者：Asghar, MA；Zahir, E；Shahid, SM；Khan, MN；Asghar, MA；Iqbal, J；Walker, G
作者单位：PCSIR Labs Complex
期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY
期刊影响因子：2.711
出版年份：2018
出版刊次：-
点击下载：铁、铜、银纳米粒子: 用绿茶和红茶提取物绿色合成并评价其抗菌、抗真菌及吸附黄曲霉毒素B1的活性