The presence of aesculin and a scopoletin glycoside has been demonstrated in extracts of potato tubers, and quercetin, caffeic acid, aesculetin and scopoletin in hydrolysed extracts. A spectrophotometric method for the estimation of phenolase activity is described and using this and conventional manometric techniques the activity of a potato phenolase preparation has been measured with a large number of phenolic compounds.
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Baruah et al. (1959) studied this question.
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