| Autor: |
Nada, Hanady G., Ali, Hamdy Elsayed Ahmed, El-Behery, Reham R., Shanab, Sanaa Mahmoud Metwally, Elshatoury, Einas H. |
| Předmět: |
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| Zdroj: |
Journal of Cluster Science; Sep2022, Vol. 33 Issue 5, p2055-2068, 14p |
| Abstrakt: |
A group of nanoparticles (NPs); ZnO, CuO, MgO, and Se were eco-friendly biosynthesized using gamma irradiated culture filtrate of Bacillus cereus. The impact of obtained NPs on growth and lipid accumulation of Chlorella vulgaris was evaluated. NPs were characterized by UV–Vis., FTIR, XRD, and TEM. After irradiation, an increase in NPs reduction and/or yield was observed and confirmed by UV. NPs demonstrated spherical morphology with crystal size; 12–105 nm indicated by XRD and TEM images. FTIR analysis of the bacterial filtrate suggested the presence of biomolecules which may act as reducing and stabilizing agents. Low concentrations of obtained NPs enhanced the biomass and lipid production of C. vulgaris with 50 mg/L of ZnONPs demonstrating the highest potential to enhance both of them. Saturated and polyunsaturated fatty acids contents of C. vulgaris increased by ~ 16% and ~ 59% respectively, while unsaturated FA content decreased by ~ 20% compared to control. In conclusion, this study highlights the efficiency of B. cereus filtrate on biosynthesis of different NPs. Moreover, coupling of biosynthesized NPs with gamma irradiation represents a potential strategy to increase NPs yield. Irradiated biosynthesized NPs could be used to enhance the production of microalgal biomass and lipids as a promising feedstock for several applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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