NanoBioelectrochemistry Research Center, Bam University of Medical Sciences, Bam, Iran.
Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
Bioprocess Biosyst Eng. 2019 Dec;42(12):2007-2014. doi: 10.1007/s00449-019-02193-8. Epub 2019 Aug 26.
Simpler and biocompatible greener approaches for the assembly of nanoparticles (NPs) have been the focus lately which have minimum environmental damage and often entails the use of natural biomolecules to synthesize NPs. Such greener synthesis of nanoparticles has capitalized on the use of microbes, fungi, and plants using biological resources. In this study, Periplaneta americana (American cockroach) wings' extract (chitin-rich) is studied as a novel biomaterial for the first time to synthesize silver NPs (less than 50 nm); chitin is the second most abundant polymer after cellulose on earth. The physicochemical properties of these NPs were analyzed using UV-visible spectroscopy, X-ray diffraction, and transmission electron microscopy (TEM). The insecticidal effect of ensuing NPs was examined on the mortality of Aphis gossypii under laboratory conditions; 48 h after treatments of A. gossypii with silver NPs (100 μg/ml), the mortality rate in treated aphids was about 40% (an average), while an average percentage of losses in the control sample was about 10%. These results indicate the lethal effect of green-synthesized silver NPs on A. gossypii, in vitro. Greener synthesis of silver nanoparticles using American cockroach wings and their insecticidal activities.
最近，人们关注的焦点是更简单、更具生物相容性和绿色环保的纳米颗粒（NPs）组装方法，这些方法对环境的破坏最小，通常需要使用天然生物分子来合成 NPs。这种绿色合成纳米颗粒利用微生物、真菌和植物利用生物资源。在这项研究中，美洲大蠊（美洲大蠊）翅膀的提取物（富含几丁质）首次被研究为一种新型生物材料，用于合成小于 50nm 的银纳米颗粒；几丁质是地球上仅次于纤维素的第二大丰富聚合物。使用紫外-可见分光光度法、X 射线衍射和透射电子显微镜（TEM）分析了这些 NPs 的物理化学性质。在实验室条件下，研究了随后的 NPs 对棉蚜死亡率的杀虫效果；用银纳米颗粒（100μg/ml）处理棉蚜 48 小时后，处理过的蚜虫的死亡率约为 40%（平均），而对照样本的平均损失率约为 10%。这些结果表明，绿色合成的银纳米颗粒对棉蚜具有致死作用，体外。使用美洲大蠊翅膀进行绿色合成银纳米颗粒及其杀虫活性。
