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Algal Response to Metal Oxide Nanoparticles: Analysis of Growth, Protein Content, and Fatty Acid Composition
BioEnergy Research ( IF 3.6 ) Pub Date : 2020-02-21 , DOI: 10.1007/s12155-020-10099-7
Nasrin Fazelian , Morteza Yousefzadi , Ali Movafeghi

This study was conducted to determine the impacts of ZnO-, CuO-, and Fe2O3-nanoparticles (NPs) on the growth, protein content, and fatty acid profile of the green microalga Nannochloropsis oculata. The growth of alga was inhibited by the increasing concentration of NPs in the order of CuO-NPs > ZnO-NPs > Fe2O3-NPs. Protein content went up in response to ZnO- and Fe2O3-NPs and decreased after exposure to CuO-NPs. The analysis of fatty acid profile revealed the negative effect of CuO- and Fe2O3-NPs on the content of saturated fatty acids (SFAs). By contrast, the content of SFAs was enhanced in the algal cells treated with ZnO-NPs. The level of unsaturated fatty acids (USFAs) was increased upon reflection to CuO-NPs, but it was reduced after treatment with ZnO- and Fe2O3-NPs. The analysis of biodiesel indicators showed that the cloud point (CP) can be increased considerably in the algal cells exposed to ZnO- and CuO-NPs. Intriguingly, the cold filter plugging point (CFPP) of biodiesel was remarkably elevated in the treated cells with Fe2O3-NPs. Taken all together, despite the toxicity caused by high concentrations of metal oxide NPs, NPs could raise the amount of CP and CFPP and improve the oxidative stability in N. oculata biodiesel.

中文翻译:

藻类对金属氧化物纳米颗粒的响应:生长,蛋白质含量和脂肪酸组成的分析

进行了这项研究以确定ZnO-,CuO-和Fe 2 O 3纳米颗粒(NPs)对绿色微藻Nannochloropsis oculata的生长,蛋白质含量和脂肪酸谱的影响。藻类的生长受到NPs浓度增加的抑制,其浓度顺序为CuO-NPs> ZnO-NPs> Fe 2 O 3 -NPs。蛋白质含量响应于ZnO-和Fe 2 O 3 -NPs而升高,而暴露于CuO-NPs后降低。脂肪酸谱分析显示了CuO-和Fe 2 O 3的负面影响-NPs对饱和脂肪酸(SFA)的含量。相反,在用ZnO-NPs处理的藻类细胞中,SFA的含量增加了。反射至CuO-NPs后,不饱和脂肪酸(USFAs)的含量增加,但用ZnO-和Fe 2 O 3 -NPs处理后,其含量降低。生物柴油指标的分析表明,在暴露于ZnO-和CuO-NPs的藻类细胞中,浊点(CP)可以大大提高。有趣的是,在用Fe 2 O 3 -NPs处理的细胞中,生物柴油的冷滤堵塞点(CFPP)显着提高。综上所述,尽管高浓度的金属氧化物NPs会引起毒性,但NPs可以增加CP和CFPP的含量并提高其氧化稳定性。N. oculata生物柴油。
更新日期:2020-02-21
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