FIG. 4.

Increases in cell density (•) and sulfide concentration (○) during anaerobic growth of strain EbS7 with ethylbenzene. Ethylbenzene (▴) was quantified only at the beginning and end of growth. Ethylbenzene was dissolved in a carrier phase of HMN, but for convenience the concentration indicated was calculated by attributing it to the aqueous phase. The growth experiment was carried out in a flat 250-ml bottle containing 200 ml of medium and 0.13 ml of ethylbenzene dissolved in 6 ml of HMN as a carrier phase. The experiment was carried out separately from the growth experiments whose results are shown in Table 2.