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首页> 外文期刊>Limnologica >Protective effects of chitosan against the hazardous effects of zinc oxide nanoparticle in freshwater crustaceans Ceriodaphnia cornuta and Moina micrura
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Protective effects of chitosan against the hazardous effects of zinc oxide nanoparticle in freshwater crustaceans Ceriodaphnia cornuta and Moina micrura

机译：壳聚糖对氧化锌纳米颗粒对淡水甲壳动物Ceriodaphnia cornuta和Moina micrura的危害作用的保护作用

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摘要

Nanoparticle contamination in freshwater habitat leads to the drastic reduction in the population of freshwater micro crustaceans. Both Ceriodaphnia.cornuta and Moina micrura were considered as the potential biological bio-tracers of freshwater ecosystem. This study describes the chemical synthesis of zinc oxide nanoparticles (ZnO NPs) using zinc nitrate as the starting material. The physico-chemical characterization of ZnO NPs was made by UV-Vis spectroscopy, X-Ray Diffraction (XRD), Fourier Transform Infra Red (FTIR) and Transmission Electron Microscopy (TEM). ZnO NPs elicited 100% and 76% mortality of freshwater crustaceans, Ceriodaphnia cornuta and Moina micrura at 160 mu g L-1 respectively. The accumulation of ZnO NPs in the intestine and loss of antennae and carapace were clearly visualized through light microscopy. The exposure of C. cornuta and M. micrura neonates at 160 mu g L-1 of ZnO NPs showed abnormal swimming behaviour after 12 h. However, chitosan significantly reduced the mortality and enhanced the survival of C cornuta and M. micrura at 100 mu gml(-1). This study concludes the protective effect of chitosan against the hazardous effect of ZnO NPs in C. cornuta and M. micrura. (C) 2016 Elsevier GmbH. All rights reserved.
机译：淡水生境中的纳米颗粒污染导致淡水微甲壳类种群的急剧减少。 Ceriodaphnia.cornuta和Moina micrura均被认为是淡水生态系统的潜在生物示踪剂。这项研究描述了以硝酸锌为起始原料化学合成氧化锌纳米颗粒（ZnO NPs）的方法。 ZnO NPs的理化特性是通过紫外可见光谱，X射线衍射（XRD），傅立叶变换红外（FTIR）和透射电子显微镜（TEM）进行的。 ZnO NPs在160μg L-1时分别引起100％和76％的淡水甲壳类动物，Ceriodaphnia cornuta和Moina micrura死亡率。通过光学显微镜可以清楚地看到ZnO NPs在肠中的积累以及触角和甲壳的损失。角果梭状芽胞杆菌和微分枝杆菌新生婴儿暴露于160μg L-1的ZnO NPs在12 h后表现出异常的游泳行为。但是，壳聚糖在100μggml（-1）时可显着降低死亡率，并提高角膜梭状芽胞杆菌和微分支杆菌的存活率。这项研究得出的结论是壳聚糖对Zn。NP和微小隐孢子虫ZnO NPs的有害作用的保护作用。 （C）2016 Elsevier GmbH。版权所有。

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