title: Enhancement effect of ethanol on lipid and fatty acid accumulation and composition of Scenedesmus sp.
abstract: The effects of ethanol concentration gradients along with varied cultivation times on lipid and fatty acid accumulation and composition of Scenedesmus sp. were studied. The maximum increment of algal density, lipid productivity, lipid content and fatty acid content were 6.61, 11.75, 1.34 and 3.14 times higher than the control group under 12h photoperiod. Algal light deprivation inhibited ethanol positive effects on algal growth and lipid biomass. The cumulative quantity of C16:0 and C18:0 decreased correspondingly with the increase of ethanol concentrations and cultivation times. Besides, unsaturated fatty acids appeared early in algal cells and increased 57.02% in maximum. However, only 2.27% (14)C was transferred from ethanol to fatty acids. The results indicated that adding proper amount of ethanol in algal culture medium was beneficial to biodiesel feedstock production and biodiesel properties.
authors.affiliation: Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, China.
authors.forename: Chengchen
authors.initials: C
authors.lastname: Wu
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Long
authors.initials: L
authors.lastname: Yue
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yang
authors.forename: Qiuguo
authors.initials: Q
authors.lastname: Fu
authors.forename: Qingfu
authors.initials: Q
authors.lastname: Ye
mesh_terms: D001711:Biotransformation / Q000187:drug effects / Q000528:radiation effects; D002250:Carbon Radioisotopes; D000431:Ethanol / Q000494:pharmacology*; D005227:Fatty Acids / Q000096:biosynthesis*; D008027:Light; D050356:Lipid Metabolism / Q000187:drug effects* / Q000528:radiation effects; D017440:Photoperiod; D044444:Scenedesmus / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism* / Q000528:radiation effects; D013997:Time Factors
chemical_list: D002250:Carbon Radioisotopes; D005227:Fatty Acids; D000431:Ethanol