Enhancement of phycocyanin productivity and thermostability from Arthrospira platensis using organic acids

Table 2 Kinetic modeling of A. platensis growth under different treatments using the modified logistic model

Treatment	µ_max	Lag-time	RMSE	R²
Control	0.10 ± 0.012^a	0.09 ± 0.005^a	0.09	0.992
AA (1 mM)	0.15 ± 0.002^bc	0.53 ± 0.024^bc	0.07	0.976
AA (2 mM)	0.21 ± 0.025^gh	1.90 ± 0.273^g	0.10	0.989
AA (3 mM)	0.19 ± 0.005^efg	1.51 ± 0.027^ef	0.12	0.969
CA (1 mM)	0.15 ± 0.011^b	0.01 ± 0.00^a	0.09	0.961
CA (2 mM)	0.17 ± 0.007^bcd	0.27 ± 0.104^ab	0.13	0.954
CA (3 mM)	0.19 ± 0.010^defg	0.05 ± 0.039^a	0.11	0.969
SA (1 mM)	0.14 ± 0.000^b	0.39 ± 0.238^abc	0.09	0.971
SA (2 mM)	0.24 ± 0.006ⁱ	0.70 ± 0.271^c	0.09	0.988
SA (3 mM)	0.20 ± 0.017^fgh	0.29 ± 0.220^ab	0.13	0.965
FA (1 mM)	0.18 ± 0.007^def	1.10 ± 0.254^d	0.10	0.980
FA (2 mM)	0.22 ± 0.000^hi	1.43 ± 0.000^de	0.08	0.989
FA (3 mM)	0.19 ± 0.001e^fg	0.55 ± 0.148^bc	0.12	0.975
OA (1 mM)	0.18 ± 0.013^cde	1.16 ± 0.022^de	0.08	0.982
OA (2 mM)	0.17 ± 0.004^bcd	1.45 ± 0.045^de	0.06	0.990
OA (3 mM)	0.18 ± 0.021^def	1.85 ± 0.345^fg	0.09	0.980

AA acetic acid, CA citric acid, SA succinic acid, FA fumaric acid, OA oxalic acid
Different superscript letters within columns indicate significant differences at p < 0.05
µ_max maximum growth rate, RMSE root means square error, R² coefficient of determination

ISSN: 1475-2859