FIG 2.
Relationship between in vitro SCFA production and pH. (A) In vitro total SCFA production over control is positively correlated with the pH of starting fecal slurries (P = 0.003, ρ = 0.46; Spearman correlation). (B) Relationship between SCFA production and the final pH of fermentation vessels (P = 0.067, ρ = 0.29; Spearman correlation).