Effect of electron-beam irradiation on the antioxidant activity of extracts from Citrus unshiu pomaces

Ultrasound-assisted extraction of polyphenols (flavanone glycosides) from orange (Citrus sinensis L.) peel

“…Up to now, several conventional extraction techniques have been reported for the extraction of phenols from citrus peels like solvent extraction (Anagnostopoulou et al, 2006;Jeong et al, 2004;Li et al, 2006a;Manthey & Grohmann, 1996;Xu, Ye, Chen, & Liu, 2007;Zia-ur-Rehman, 2006), hot water extraction (Xu et al, 2008), alkaline extraction (Bocco et al, 1998;Curto, Tripodo, Leuzzi, Giuffrè, & Vaccarino, 1992), resin-based extraction (Calvarano, Postorino, Gionfriddo, Calvarano, & Bovalo, 1996;Kim, Kim, Lee, & Kim, 2007), enzyme-assisted extraction (Li et al, 2006b), electron beam-and c-irradiation-based extractions (Kim, Lee, Lee, Nam, & Lee, 2008;Oufedjikh, Mahrouz, Amiot, & Lacroix, 2000) and supercritical fluid extraction (Giannuzzo, Boggetti, Nazareno, & Mishima, 2003). These conventional or more innovative extraction techniques may either cause the degradation of the targeted compounds due to high temperature and long extraction times as in solvent extractions, or pose some health-related risks due to the unawareness of safety criteria during irradiation.…”

Optimization of ultrasound assisted extraction of anthocyanins from red cabbage using Taguchi design method

“…solvent extraction (Anagnostopoulou et al 2006;Jeong et al 2004), hot water extraction (Xu et al 2008), alkaline extraction (Bocco et al 1998), resin based extraction (Kim et al 2007), enzyme assisted extraction (Li et al 2006), electron beam and gamma irradiation based extractions (Kim et al 2008) and supercritical fluid extraction (Giannuzzo et al 2003). Both conventional and more innovative extraction techniques may either cause the degradation of the targeted compounds due to high temperature and long extraction times as in solvent extractions, or pose some health related risks due to the unawareness of safety criteria during irradiation.…”

Effect of Electron-beam Irradiation on Polymethoxylated Flavones Content of Citrus unshiu Pomaces

“…In the by-products of citrus fruit after juice, there are free phenolic compounds rich in flavones and glycosylated flavones, and bound phenolic compounds contain mainly phenolic acids and flavonols (8). Many covalently bound forms such as esters, amides and glycosides of phenolic acids have been detected in citrus fruits (28), and electron-beam irradiation was effective to increase phenolic contents of CP (13). Electron-beam irradiation, however, decreased the amount of tangeretin in CP extract, suggesting that tangretin may have a different pathway of conversion by irradiation than that of nobiletin or sinensetin.…”

“…In our previous study, the electron-beam irradiation could increase phenolic contents and the antioxidant activities of CP (13). The objective of this study was to elucidate the effect of electron-beam irradiation on PMF contents of CP.…”