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Pakistan Journal of Nutrition
  Year: 2009 | Volume: 8 | Issue: 7 | Page No.: 1030-1031
DOI: 10.3923/pjn.2009.1030.1031
 
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Polyphenol Contents and Polyphenol Oxidase Activities of Some Nigerian Kolanuts
T.P. Prohp, K.E. Ekpo, E.V. Osagie, A. Osagie and H. Obi

Abstract:
The levels of polyphenol and activities of polyphenol oxidases in some Nigerian kolanuts were investigated. Garcina cola had the least polyphenol content of 15.60±1.70 (mg/g), while Cola nitida (red) recorded the highest value of 33.50±2.51mg/g. Polyphenol oxidase from Garcina cola had its optimum pH of activity in the acidic region (pH 3), but the white and red species of Cola nitida had a neutral (pH 7) optimum pH. With catechol as substrate, polyphenol oxidase activity was highest in Cola nitida (white) (55.70±2.60) and lowest in Garcina cola (2.22 ± 0.04). Whilst the values of polyphenol obtained may explain the high incidence of enzymatic browning in some Nigeria kolanuts, the white cultivar of Cola nitida could be further explored as a good source of polyphenol oxidase.
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How to cite this article:

T.P. Prohp, K.E. Ekpo, E.V. Osagie, A. Osagie and H. Obi, 2009. Polyphenol Contents and Polyphenol Oxidase Activities of Some Nigerian Kolanuts. Pakistan Journal of Nutrition, 8: 1030-1031.

DOI: 10.3923/pjn.2009.1030.1031

URL: https://scialert.net/abstract/?doi=pjn.2009.1030.1031

 
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