naa a22 4500 510724248 CHVBK 20180411082929.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1007/s11947-011-0669-5 doi (NATIONALLICENCE)springer-10.1007/s11947-011-0669-5 Antioxidant Properties and Rutin Content of High Pressure-Treated Raw and Roasted Buckwheat Groats [Elektronische Daten] [Wioletta Błaszczak, Danuta Zielińska, Henryk Zieliński, Dorota Szawara-Nowak, Józef Fornal] The effect of high hydrostatic pressure treatment (200MPa for 2, 4, and 9min) on the total antioxidant capacity (TAC), reducing capacity (TRC), and rutin content of raw and roasted buckwheat groats was studied by an updated analytical strategy. TAC and TRC were calculated as the overall capacity of hydrophilic and lipophilic antioxidants. Antioxidant capacity was measured against the 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonate) radical cation (ABTS•+) and the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH•), and by the photo-induced chemiluminescence assay against the superoxide anion radical (O 2 −• ), whereas the reducing capacity was evaluated with the Folin-Ciocalteu reagent (FCR) and directly by the cyclic voltammetry method. Rutin content was determined by HPLC analysis. The TAC of pressure-treated raw and roasted groats was 16-20% and 12.5-17% lower in comparison with untreated groats, respectively. Hydrophilic antioxidants were the main contributor to the TAC of pressure-treated raw and roasted groats. High pressure treatment of raw groats lowered the FCR reducing capacity of hydrophilic antioxidants by an average of 12.6% and 12%, respectively. In contrast, the pressurization of roasted groats increased radical scavenging capacity by 18% on average due to the presence of hydrophilic compounds in roasted groats. The variations in the antioxidant properties of pressure-treated raw groats were accompanied by an average 47% drop in rutin content, whereas irregular changes were noted in HP-treated and roasted material. Springer Science+Business Media, LLC, 2011 Buckwheat nationallicence High hydrostatic pressure nationallicence Roasting nationallicence Antioxidant capacity nationallicence Total polyphenols nationallicence Rutin nationallicence Błaszczak Wioletta Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-747, Olsztyn, Poland aut Zielińska Danuta University of Warmia and Mazury in Olsztyn, Plac Lodzki 4, 10-957, Olsztyn, Poland aut Zieliński Henryk Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-747, Olsztyn, Poland aut Szawara-Nowak Dorota Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-747, Olsztyn, Poland aut Fornal Józef Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-747, Olsztyn, Poland aut Food and Bioprocess Technology Springer-Verlag 6/1(2013-01-01), 92-100 1935-5130 6:1<92 2013 6 11947 https://doi.org/10.1007/s11947-011-0669-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11947-011-0669-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Błaszczak Wioletta Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-747, Olsztyn, Poland aut NATIONALLICENCE 700 1- Zielińska Danuta University of Warmia and Mazury in Olsztyn, Plac Lodzki 4, 10-957, Olsztyn, Poland aut NATIONALLICENCE 700 1- Zieliński Henryk Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-747, Olsztyn, Poland aut NATIONALLICENCE 700 1- Szawara-Nowak Dorota Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-747, Olsztyn, Poland aut NATIONALLICENCE 700 1- Fornal Józef Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-747, Olsztyn, Poland aut NATIONALLICENCE 773 0- Food and Bioprocess Technology Springer-Verlag 6/1(2013-01-01), 92-100 1935-5130 6:1<92 2013 6 11947 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer