A UV-vis Lambda 2 spectrophotometer (Perkin-Elmer, Milan,
Italy) and 1 cm quartz cells were used throughout. Cyanidin-
3-glucoside chloride standard (purity >95%) was purchased
from Extrasynthe`se (Genay, France). 95% Ethanol for spectrophotometry
and purity grade HPLC solvents were used