title: Effects of inorganic carbon concentration on carbon formation, nitrate utilization, biomass and oil accumulation of Nannochloropsis oculata CS 179.
abstract: This investigation examined the effects of the inorganic carbon concentration (4, 0.8 and 0 g/L NaHCO(3)) on the carbon formation, nitrate utilization, growth and fatty acids compositions of Nannochloropsis oculata. The dissolved inorganic carbon (DIC) concentration in the three treatments decreased sharply during the first 6 days, and the percentage of dissolved organic carbon (DOC) (% of total organic carbon (TOC)) decreased with the depletion of the DIC. The NO(3)(-) assimilation of the algae was correlated with the DIC concentration. The algae in the highest DIC treatment had the highest specific grow rate (0.0843 d(-1)) (P<0.0001), and their biomass and fatty acid methyl esters (FAME) productivity were 84.00 and 9.69 mg/L/d, respectively (P<0.0001). Contents of C16 and C18 series (% of FAME) were high and the C16:0 increased with the decrease of C18:1 during the cultivation. The iodine value (IV) of the algae was low at the low DIC media.
authors.affiliation: Key Laboratory of Marine Bio-Resource Sustainable Utilization, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China. linqiangzsu@163.com
authors.forename: Qiang
authors.initials: Q
authors.lastname: Lin
authors.forename: Na
authors.initials: N
authors.lastname: Gu
authors.forename: Gang
authors.initials: G
authors.lastname: Li
authors.forename: Junda
authors.initials: J
authors.lastname: Lin
authors.forename: Liangmin
authors.initials: L
authors.lastname: Huang
authors.forename: LingLing
authors.initials: L
authors.lastname: Tan
mesh_terms: D002244:Carbon / Q000737:chemistry*; D005227:Fatty Acids / Q000378:metabolism; D058086:Microalgae / Q000254:growth & development / Q000378:metabolism*; D009566:Nitrates / Q000378:metabolism*; D009821:Oils / Q000378:metabolism*
chemical_list: D005227:Fatty Acids; D009566:Nitrates; D009821:Oils; D002244:Carbon