Electron spin resonance identification of irradiated fruits

Raffi, J.; Agnel, Jean-Pierre L.

doi:10.1016/1359-0197(89)90325-1

Cited by 52 publications

(51 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The exception was the sample of dried California plum for which no EPR signal was detected after irradiation. The widths of these signals, changing from 5.5 ± 0.2 mT for banana to 6.2 ± 0.2 mT for papaya, are consistent with the data published earlier for other fruits sugars [4,13,14].…”

Section: Resultssupporting

confidence: 80%

“…Raffi and coworkers observed stable, multiline EPR signals in dried fruits like fi gs, bilberries, raspberries and red currants exposed to ionizing radiation [3]. The author suggested that multicomponent EPR signal observed in dried fruits exposed to radiation is assigned to radicals trapped in crystalline sugars [4][5][6]. Stability and specifi city of these signals make them suitable for control whether dried fruits were irradiated or not [7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Identification of irradiated dried fruits using EPR spectroscopy

Stachowicz

Michalik

2015

Nukleonika

View full text Add to dashboard Cite

Abstract. The dominating carbohydrates in fruits are monosaccharides like fructose, glucose, sorbose and mannose. In dehydrated fruits, concentration of monosaccharides is higher than in fresh fruits resulting in the formation of sugar crystallites. In most of dried fruits, crystalline fructose, and glucose dominate and appear in proportion near to 1:1. Irradiation of dried fruits stimulates radiation chemical processes resulting in the formation of new chemical products and free radicals giving rise to multicomponent EPR signal which can be detected for a long period of time. For that reason, it is used as a marker for the detection of radiation treatment of dried fruits. It has been found that EPR spectra recorded in dried banana, pineapple, papaya, and fi g samples resemble the EPR spectrum obtained by computer addition of fructose and glucose spectra taken in proportion 1:1. The decay of radiation induced EPR signals proceeds in dried fruits fast during the fi rst month of observation and becomes much slower and almost negligible after prolonged storage. However, it remains intense enough for EPR detection even one year after processing. The radiation induced EPR signal is easily detected in dried fruits exposed to 0.5 kGy of gamma rays. Thus, the EPR method of the detection of irradiated fruits can be used for the control of dried fruits undergoing quarantine treatment with 200-300 Gy of ionizing radiation.

show abstract

Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Identification of irradiated dried fruits using EPR spectroscopy

Stachowicz

Michalik

2015

Nukleonika

View full text Add to dashboard Cite

show abstract

“…Similar side signals in wheat flour that contains cellulose and starch are more complicated Ukai & Shimoyama, 2005). Side signals have been observed in ginseng that contains a significant amount of fiber and in irradiated strawberry seeds whose main component is cellulose (Raffi & Stocker, 1996;Raffi & Agnel, 1989). However, only one side signal at the lower magnetic fields has been detected (Raffi & Agnel, 1989).…”

Section: Introductionmentioning

confidence: 86%

“…Side signals have been observed in ginseng that contains a significant amount of fiber and in irradiated strawberry seeds whose main component is cellulose (Raffi & Stocker, 1996;Raffi & Agnel, 1989). However, only one side signal at the lower magnetic fields has been detected (Raffi & Agnel, 1989). The side signal in the higher magnetic field was considered covered by other stronger ESR signals.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Relaxation Behavior of Free Radicals in Irradiated Cellulose Using Pulse and Continuous-Wave Electron Spin Resonance

Kameya¹,

Ukai²

2013

Cellulose - Fundamental Aspects

View full text Add to dashboard Cite

“…The preirradiation free radical content of vegetable foods varies substantially, due presumably to the different processing conditions: grinding, exposure to sunlight, heat drying. Furthermore, the accuracy of this method is also affected by a gradual postirradiation loss of signal with storage time (Davidson and Forrester 1988, Troup et al 1989, Yang et al 1987 Raffi et al (1988) identified a signal in the ESR spectrum which was only present in the achenes of irradiated strawbemes. Within the limits of commercial handling of strawberries, e.g.…”

Section: A Ouantitation Of Free Radicals By Electron Spin Resonancementioning

confidence: 99%