Abstract
Use of microwave and pulsed electric field (PEF) technologies for optimization of polyphenol extraction from defatted flax seed cake was attempted using a Box-Behnken response surface design. Polyphenols were extracted after microwave or PEF treatments using ultrasound under fixed variables of 200 W of ultrasonic power, a 70°C water bath, and 20 min of extraction time. Measured responses were total phenolic and total flavonoid contents, and 2,2,-diphenyl-1-picrylhydrazyl radical (DPPH·) scavenging activity and ferric reducing/antioxidant power activities. Maximum yields of all responses were achieved under optimum conditions for microwave processing=5 min, a liquid to solid ratio=6, and at 644 W, and for PEF-assisted extraction for 30 V at 30 Hz with a 10% ethanol concentration, and a treatment time=10 s. Under optimized microwave or PEF processing conditions, yields of polyphenols from defatted seed cake were maximized.
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Teh, SS., Niven, B.E., Bekhit, A.ED.A. et al. Optimization of polyphenol extraction and antioxidant activities of extracts from defatted flax seed cake (Linum usitatissimum L.) using microwave-assisted and pulsed electric field (PEF) technologies with response surface methodology. Food Sci Biotechnol 24, 1649–1659 (2015). https://doi.org/10.1007/s10068-015-0214-9
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DOI: https://doi.org/10.1007/s10068-015-0214-9