Fig. 2From: Enhancement of phycocyanin productivity and thermostability from Arthrospira platensis using organic acidsVariation in the degradation rate constant (K) values under different treatments of organic acids in relation to the control at different temperatures: a 45 ℃, b 55 ℃, c 65 ℃, and d 75 ℃. Different letters above columns indicate significant differences at p < 0.05Back to article page