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Leakage of Anthocyanins from Skin of Raw and Cooked Highbush Blueberries (Vaccinium corymbosum L.)

✍ Scribed by GERALD M. SAPERS; JOHN G. PHILLIPS


Book ID
108811148
Publisher
Institute of Food Technologists
Year
2006
Tongue
English
Weight
376 KB
Volume
50
Category
Article
ISSN
0022-1147

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Browning reactions which occurred after crushing fresh blueberries (V accinium corymbosum L) were followed by determination of chlorogenic acid colour density, polymer colour and the level of polymers. A polyphenol oxidase (PPO) activity plays a dominant role in enzymatic browning. Peroxidase (POD)

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The most efficient method for polyphenol oxidase (PPO) extraction from Highbush blueberry fruits was the preparation of an acetone powder. No activity was detected after direct extraction with phosphate bu †er (pH 6Γ‰5) and detergents such as Triton X-100. PPO has been puriÐed 19-fold, by ultraÐltrat