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Vitamins and pigments as Scenedesmus exposure markers in urine and feces. (A) Pantothenic acid in urine. (B) Pyridoxine in urine. (C) Riboflavin in urine. (D) 3-Hydroxy-b,e-caroten-3′-one and chlorophyllide b in feces. P-values indicate overall significances across all sample groups from the one-way ANOVA test. Means with different letter labels (a,b,c) indicate significant differences (P < 0.05) between two dietary treatments by the Tukey post hoc test.
