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- W2927600967 abstract "Large amounts of synthetic nitrogen fertilizers for microalgal growth and low productivity of microalgae-based processes are fundamental issues in commercialization of biofuels derived from microalgae biomass. The present work was undertaken to benefit the nitrogen-fixing ability of heterocystous cyanobacterium, Anabaena vaginicola, as a substitute of nitrogen fertilizer for culturing Chlorella vulgaris and Nannochloropsis oculata. The results indicated that the microalgae could both assimilate the nitrogenous extract of A. vaginicola as the only nitrogen source of the medium and utilize organic carbon content of the extract in mixotrophic growth. Presence of phytohormones in the extract of A. vaginicola was also detected which might offer a potential to enhance microalgal productivity. The strategy of utilizing the cyanobacterial extract in the growth medium improved biomass and lipid productivity of the microalgae. Biomass concentrations of the microalgae in the media with the extract as an alternative to nitrate increased significantly (p ≤ 0.05) compared to the control media, being 2.80 g L−1 for C. vulgaris nearly twice the value in the control medium, and 2.99 g L−1 for N. oculata almost 2.3 times higher than the value in the control medium. Lipid productivity of C. vulgaris and N. oculata increased by 2.68 (97.28 mg L−1 day−1 vs. 36.21 mg L−1 day−1) and 3.40 (145.43 mg L−1 day−1 vs. 42.76 mg L−1 day−1) times, respectively, in the extract supplemented media as nitrate substitute relative to the control media. The extract provided nutrients required for culturing the microalgae and supported growth without addition of other nutrients to the growth medium. Supplementation of the extract to the media could also favorably manipulate the fatty acid composition of the microalgae, resulting in fatty acid profiles rich in saturated fatty acids and monounsaturated fatty acids with lower levels of polyunsaturated fatty acids." @default.
- W2927600967 created "2019-04-11" @default.
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- W2927600967 date "2019-05-01" @default.
- W2927600967 modified "2023-10-01" @default.
- W2927600967 title "Cyanobacterial extract as a source of nutrients for mixotrophic growth of Chlorella vulgaris and Nannochloropsis oculata" @default.
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- W2927600967 doi "https://doi.org/10.1016/j.algal.2019.101480" @default.
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