Acetic acid was not detected in unfermented pulp or nibs. For the
2011 beans, acetic acid was first detected in the pulp at 48 h and increased
to maximum concentrations of about 15 mg/g in the untreated
and nisin treated fermentations before declining (Fig. 5a, c). In the nibs,
acetic acid was detected at maximum levels of about 20 mg/g by