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  • Title: Bioprospecting microbes for single-cell oil production from starchy wastes.
    Author: Chaturvedi S, Kumari A, Nain L, Khare SK.
    Journal: Prep Biochem Biotechnol; 2018 Mar 16; 48(3):296-302. PubMed ID: 29424627.
    Abstract:
    Production of lipid from oleaginous yeast using starch as a carbon source is not a common practice; therefore, the purpose of this investigation was to explore the capability of starch assimilating microbes to produce oil, which was determined in terms of biomass weight, productivity, and lipid yield. Saccharomyces pastorianus, Rhodotorula mucilaginosa, Rhodotorula glutinis, and fungal isolate Ganoderma wiiroense were screened for the key parameters. The optimization was also performed by one-factor-at-a-time approach. Considering the specific yield of lipid and cell dry weight yield, R. glutinis and R. mucilaginosa showed superiority over other strains. G. wiiroense, a new isolate, would also be a promising strain for starch waste utilization in terms of extracellular and intracellular specific yield of lipids. Extracellular specific yield of lipid was highest in R. glutinis culture (0.025 g g-1 of biomass) followed by R. mucilaginosa (0.022 g g-1 of biomass) and G. wiiroense (0.020 g g-1 of biomass). Intracellular lipid was again highest in R. glutinis (0.048 g g-1 of biomass). The most prominent fatty acid methyl esters among the lipid as detected by GC-MS were saturated lipids mainly octadecanoic acid, tetradecanoate, and hexadecanoate. Extracellular lipid produced on starch substrate waste would be a cost-effective alternative for energy-intensive extraction process in biodiesel industry.
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