Fig 5.

(A) Influence of pH on S₈⁰ particle size and particle size growth rates in base salt medium (no peptone) with the pH adjusted to 2.0, 3.0, and 4.0 in the presence of 25 μM polysulfide. (B) Influence of peptone on S₈⁰ particle size and particle size growth rates in base salt medium amended with 25 μM polysulfide and with the pH adjusted to 3.0. Both analyses were performed at a temperature of 81°C. Power functions used to model the behavior of particle growth are indicated for each experiment.