Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2007.267.272ParisaSetareh RezaHeidari ElhamGhasemifar RashidJamei 22007102The influences of temperature, UV irradiation, pH and copigment concentration on the stability of a copigmentation complex were investigated. The copigments selected for the study included: Catechin, Chlorogenic acid and Gallic acid. Five levels of copigment concentration as: 0, 120, 240, 480, 960 mg L-1 were examined. The copigmentation effect increased with copigment contain. UV irradiation had a stronger degradation effect on the copigmentation complex than heating at 80°C. The suitable pH for copigmentation complex was in pH 3.5. In this study, catechin predominate among copigments.]]>Abyari, M., R. Haidari and R. Jamei,20066638645Asen, S., R.N. Stevart and K.H. Norria,1972111391144Bakowska, A., A.Z. Kucharska and J. Oszmianski,200381349355Baranac, J.M., N.A. Petranovic and J.M. Dimitric-Marcovic,19964413331336Baranac, J.M., N.A. Petranovic and J.M. Dimitric-Marcovic,19974516981700Brouillard, R., G. Mazza, Z. Saad, A.M. Albrecht-Gary and A. Cheminat,198911126042610Brouillard, R., M.C. Wigand, O. Dangles and A. cheminat,1991212351241Chen, L.J. and G. Hrazdina,198120297297Dangles, O., M.C. Wigand and R. Brouillard,199241206216Davies, A.J. and G. Mazza,199341716720Kucharska, A.Z., J. Oszmianski, M. Kopacz and E. Lamer-Zarawska,19981998Marcovic. D.J.M., N.A. Petranovic and J.M. Baranac,20004855305536Marcovic, D.J.M., N.A. Petranovic and J.M. Baranac,200578223228Mazza, G. and R. Brouillard,198725207225Mazza, G. and R. Brouillard,19902910971102Mazza, G. and E. Miniati,1993Ist Edn.,Wiliams, M. and G. Hrazdina,1979446668Wilska-Jeszka, J. and A. Korzuchowska,19962033842