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Time courses of volatile sulfur compounds (VSC) (A) and syringate and volatile fatty acids (VFA) (B) of a sulfide-rich culture of strain SYR1 and time courses of syringate and VOSC of a sulfide-free culture of strain SYR1 (C). Arrows indicate pulsewise additions of sodium sulfide. Symbols: ▪, sulfide; ♦, MT; ▴, DMS; □, syringate; ⋄, acetate; ▵, butyrate.
