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Polyphenolic compounds are abundantly found in natural dyes. The cupric reducing antioxidant capacity assay originally developed in our laboratories was utilized to estimate the total polyphenolic content of natural dyes (i.e., Rubia tinctorum L., Curcuma longa L., Alkanna tinctoria, Matricaria chamomilla, Dactylopius coccus Costa) for the first time. The polyphenolic compounds such as ellagic acid,...
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