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• W2893048578 abstract "BACKGROUND:Vaccinium meridionale is a fruit rich in polyphenols, with coloring and antioxidant properties. OBJECTIVE:Decoctions of the fruit were prepared and the effect of temperature, time and pH on oxidative stability and color parameters were evaluated. METHODS:To evaluate the oxidative stabili ty the ORAC, FRAP, and DPPH methodologies and the quantification of phenols and anthocyanins by spectrophotometric tests were developed, while colors parameters were determined using a colorimeter and UV- VIS spectrums. RESULTS:Rising the temperature from 60 to 100°C increased phenol content, FRAP and ORAC values up to 724.24 mg gallic acid/L, 978.51 mg ascorbic acid/L and 14172μmol Trolox/L, respectively; anthocyanin content decreased above to 80°C. At pH of 3.60 to 7.40 the antioxidant and color properties were not altered, at pH 10 there was a reduction of the antioxidant activity of 48.9%, and loss of the red tones of the decoctions. CONCLUSION:The content of phenols increased with temperature, increasing the antioxidant capacity, however the anthocyanins were degraded above 80°C and 20 minutes of processing." @default.
• W2893048578 created "2018-10-05" @default.
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• W2893048578 date "2019-03-07" @default.
• W2893048578 modified "2023-10-14" @default.
• W2893048578 title "Effect of pH, temperature and time of extraction on the antioxidant properties of Vaccinium meridionale Swartz" @default.
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• W2893048578 doi "https://doi.org/10.3233/jbr-18299" @default.
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