Reversible degradation kinetics of vitamin C in peas during frozen storage

Serpen A., Gokmen V., Bahceci K. S., Acar J.

EUROPEAN FOOD RESEARCH AND TECHNOLOGY, cilt.224, sa.6, ss.749-753, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 224 Sayı: 6
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1007/s00217-006-0369-y
  • Dergi Adı: EUROPEAN FOOD RESEARCH AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.749-753
  • Anahtar Kelimeler: vitamin C, ascorbic acid, blanching, frozen storage, reversible degradation kinetic, pea, ASCORBIC-ACID, THERMAL-DEGRADATION, ENZYME-ACTIVITY, BETA-CAROTENE, GREEN BEANS, VEGETABLES, QUALITY, LIPOXYGENASE, FRESH, BROCCOLI
  • Hacettepe Üniversitesi Adresli: Evet

Özet

In this study, kinetics of ascorbic acid (AA, 2-oxo-L-threo-hexono-1,4, lactone-2,3 enediol) and dehydroascorbic acid (DHAA, threo-2,3-hexodiulosonic acid-gamma-lactone) were studied in blanched and unblanched peas during frozen storage using a first order reversible consecutive reaction model. The time-dependent changes for both AA and DHAA were strongly correlated with the kinetic model described here. Blanching resulted in 19% of reduction in k(1) value (AA degradation rate constant) as compared with unblanched peas (0.227/month +/- 5.43x10(-3)/month). The regeneration rate constant of AA (k (2)) increased approximately 26 folds for blanched peas when compared to unblanched peas (0.0114/month +/- 1.04x10(-3)/month). Rate constant (k (3)) for the conversion of DHAA into 2,3-diketogulonic acid (DKGA) in blanched peas decreased approximately 31 folds by blanching treatment. This kind of kinetic analysis may be used for better understanding the effects of processing and storage conditions on vitamin C.