Abstract
According to the results of experiments on pectolytic enzymes produced by several sorts of molds, no parallel relationship could be observed between such activities on pectic substances as formation of reducing radicals, reduction of viscosity or pectin esterase and the fruit juice clarifying activity. A parallel relationship holds true between the reduction of viscosity of fruit juice and the fruit juice clarifying activity. Pectin esterase intensified the activity of some molds to hydrolyze pectic substances, but did not at all influence the same activity of others. Although pectin esterase displayed an action to intensify fruit juice clarification, it deteriorated clarity when excessive.
