Blueberries total phenolics

Prior et al. (1998) reported that ORAC values of blueberries increased with maturity of the fruits, while various growing places throughout the United States did not affect the ORAC values. A linear relationship between ORAC values, i.e., antioxidant capacity as determined by the ORAC method, was obtained with the anthocyanin (rxy = 0.77) and total phenolics (rxv = 0.92) content. 

During storage of fresh strawberries, raspberries and highbush and lowbush blueberries at 0,10,20 and 30°C for up to 8 days, the antioxidant capacity was found to be stable or even to increase (Kalt et al., 1999a). The antioxidant capacity was strongly correlated with the content of total phenolics (r = 0.83) and anthocyanins... 

Coimor, A.M., et at, 2002. Variation and heritability estimates for antioxidant activity,total phenolic contenL and anthocyanin content in blueberry progenies. J. Am. Soc. Hort, 127 82-88 Crozier, A., Yokota, T., Jaganath, I.B., Marks, S.C., Saltmarsh, M., Clifford, M.N. 2006. Secondary metabolites in fruits, vegetables, beverages, and other plant based dietary components. In Plant Secondary Metabolites Ocurrence, Structure, and Role in the Human Diet, Crozier, A., Clifford, M.N., Ashihira, H., (eds.), Blackwell Publishing Oxford, U.K., pp. 208-302. 

Kim, J.G., Kim, H.L., Kim, S.J., and Park, K.S. 2013. Fruit quality, anthocyanin and total phenolic contents, and antioxidant activities of 45 blueberry cultivars grown in Suwon, Korea. J Zhejian University-SCIENCEB (Biomedicine Biotechnology) 74(9) 793—799. 

As suggested in the literature [33], earlier studies of small fruit phytonutrient contents reported high correlations among total phenols, anthoeyanin values and antioxidant capaeities, as determined by oxygen radieal absorbance eapaeity (ORAC) and FRAP assays. Using the ORAC method, showed that espeeially the Ameriean elderberry species Sambucus canadensis L. had a mueh higher potential than eranberry and blueberry [37]. 

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