Sterilization of Black Pepper by Electron Beam Irradiation and Identification of Organic Free Radicals in Irradiated Sample by Electron Spin Resonance

Detection of organic free radicals in irradiated Foeniculi fructus by electron spin resonance spectroscopy

“…In addition, two subsignals, S1 and S2, emerged after EB irradiation, as shown in Fig. 1 observed approximately ±3 mT (g = 2.023 and g = 1.987) to either side of signal C. These two subsignals have previously been observed in irradiated fruits, spices, and medicinal herbs [10][11][12][13] and are ascribed to cellulose radicals and part of the triplet spectrum [14].…”

Free radical kinetics on irradiated fennel

“…On the other hand, the two signals observed approximately 73 mT of the signal at g ¼ 2.005 were regarded to be derived from cellulose radicals, and assigned as part of the triplet spectrum (Raffi and Agnel, 1989). These signals have been previously determined in the irradiation of fruits, spices and medicinal herbs, and were observed in irradiated samples for a long time period (Korkmaz and Polat, 2001;Raffi and Agnel, 1989;Yamaoki et al, 2005Yamaoki et al, , 2007.…”

Analysis of electron spin resonance spectra of irradiated gingers: Organic radical components derived from carbohydrates

“…When spices and herbal drugs using different plant parts (herbs, fruits, barks, roots and rhizomes) were irradiated to the level of disinfection or sterilization, sugar-like radical signals, including those of cellulose radicals (at ca. 6 mT apart), were detected for extended periods after irradiation (Yamaoki et al, 2005(Yamaoki et al, , 2007. However, the radical components in irradiated dry plant materials have not been fully identified, because the ESR spectra of irradiated plants are composite spectra, overlapping with those of a number of radical species of various stabilities.…”