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Table 2 FAME profiles of C. vulgaris when supplemented with various bicarbonate salts just prior to nitrogen depletion

From: Optimized inorganic carbon regime for enhanced growth and lipid accumulation in Chlorella vulgaris

Treatment C16:0 C16:1 C18:0 C18:1 C18:2 C18:3 Othera Total biodiesel potential (%)b Potential biodiesel productivity (g L−1 day−1)b
0 mM HCO3 7.51 ± 0.69 1.59 ± 0.16 4.72 ± 0.5 16.82 ± 2.97 3.92 ± 0.43 9.3 ± 0.75 0.4 ± 0.1 44.19 ± 5.42 0.029 ± 0.004
50 mM ACS grade NaHCO3 7.78 ± 0.46 2.33 ± 0.18 2.46 ± 0.14 31.82 ± 1.73 5.61 ± 0.35 9.06 ± 0.43 0.58 ± 0.06 59.63 ± 3.34* 0.061 ± 0.008*
50 mM industrial grade NaHCO3 7.38 ± 0.37 2.11 ± 0.05 2.28 ± 0.18 30.06 ± 1.39 5.16 ± 0.13 8.43 ± 0.74 0.61 ± 0.05 56.04 ± 2.9* 0.058 ± 0.001*
50 mM KHCO3 6.8 ± 0.22 1.79 ± 0.05 2.64 ± 1.11 27 ± 2.08 5.15 ± 0.07 7.74 ± 0.3 0.54 ± 0.13 51.62 ± 2.25* 0.048 ± 0.012*
50 mM Na2CO3 5.12 ± 0.11 1.26 ± 0.03 2.56 ± 0.04 14.47 ± 0.12 3.4 ± 0.02 5.84 ± 0.05 0.2 ± 0.05 32.82 ± 0.28 0.02 ± 0.001
25 mM NaHCO3∙Na2CO3 6.69 ± 0.08 1.84 ± 0.03 3.82 ± 0.09 23 ± 0.62 4.67 ± 0.09 7.72 ± 0.12 0.47 ± 0.08 53.33 ± 1.35* 0.041 ± 0.003*
  1. Values are reported for the completion of the experiment (5.75 days) (n = 3). All values expressed as weight percent (% weight FAME/weight biomass) unless indicated otherwise
  2. * p value <0.05 as determined by a two-tailed t test, statistically significant higher [difference between treatment and control group (0 mM HCO3 )]
  3. aSum of other compounds detected
  4. bTotal FAMEs