Antioxidant properties of carp (Cyprinus carpio L.) protein ex vivo and in vitro hydrolysates

Antioxidant activities of Rapana venosa meat and visceral mass during simulated gastrointestinal digestion and their membrane ultrafiltration fractions

“…It is interesting to note that the simulated GI digestion decreased the DPPH scavenging activity when compared to the undigested samples ( P < 0.05). Though, many research reported the GI digestion improved the DPPH scavenging activity of food resources, a similar trend was also reported for salmon (Borawska et al ., ) and carp (Borawska et al ., ). Unlike Rv visceral mass, intestinal digestion slightly but significantly ( P < 0.05) improved the DPPH radical scavenging activity of Rv meat compared to the gastric digestion.…”

“…And the intestinal digestion caused a further hydrolysis of Rv proteins with the yields of soluble protein was 31.43% and 27.21% for meat and visceral mass, respectively. Similar trends were observed in previous studies on the hydrolysis of salmon (Darewicz et al ., ), carp (Borawska et al ., ) and camel milk (Tagliazucchi et al ., ) proteins. They all reported that pepsin alone was not able to digest all the proteins and the presence of pancreatic enzymes and bile extract would result in further efficient degradation.…”

Polyphenols extract from lotus seedpod (Nelumbo nucifera Gaertn.): Phenolic compositions, antioxidant, and antiproliferative activities

“…The reducing power of PELS was evaluated based on the method published by Borawska et al (Borawska, Darewicz, Vegarud, & Minkiewicz, 2016). 0.5 ml phosphate buffer (pH 6.6, 0.2 mol/L) and 0.5 ml potassium ferricyanide (1%, w/v) were added to 0.2 ml of diluted PELS solution (1 mg/ml).…”

Efluentes do processamento de Minced de tilápia reaproveitados como coprodutos com atividade antioxidante e para uso como meio de cultura em bioprocessos

“…A adoção de uma etapa enzimática e diferentes graus de hidrólise também é observada como procedimento vantajoso na obtenção de peptídeos antioxidantes (CENTENARO et al, 2014;FAN et al, 2012;KHALED et al, 2014;NGO et al, 2010;. Pois são formados peptídeos de sequências diferentes, e certa parcela de proteínas é despolimerizada; assim, a hidrólise enzimática promove a diversidade funcional e estrutural de sítios catalíticos (BORAWSKA et al, 2016;SZABÓ, SAHIN-TÓTH, 2012;SHIAU, 2003).…”

“…Uma diferença expressiva entre resultados de ABTS e DPPH, também foi observada por Borawska et al (2016) e Zhu et al (2008, e podem ser explicadas pela diferença de seletividade estéreo dos radicais e na estequiometria da reação entre peptídeos antioxidantes e os radicais DPPH/ABTS (CORRÊA et al, 2011). Os valores elevados para DPPH, também são atribuídos aos compostos que reagem mais rapidamente com o radical, em virtude da conformação estrutural dos compostos e da quantidade de hidroxilas disponíveis na reação (BRAND-WILLIAMS; CUVELIER; BERSET, 1995).…”