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Detection of prior irradiation in dried fruits by electron spin resonance (ESR)

Abstract

Complete text of publication follows. Dried almonds, raisins, dates and pistachio were irradiated using gamma radiation and electron beam with an average absorbed dose of 5 kGy. The radiation treatment was detected by ESR spectroscopy. Different parts of the dried fruits were analysed as follows: almonds: skin; raisins: dried pulp (at 30 deg C for one week); dates: dried pulp (at 30 deg C for one week) and stone; pistachio: nutshell. A Bruker ECS 106 EPR Spectrometer, at a microwave power of 0.4 mW, at room temperature was used. The analysis were carried out 2-3 months and 6 months after irradiation. A series of signals, tentatively described as `cellulose-like`, `sugar-like` and `complex` were observed, and some slight differences between spectra recorded from samples irradiated with gamma and electrons were evident.
Authors:
Esteves, M P; [1]  Andrade, M E; [2]  Empis, J [3] 
  1. Instituto Nacional de Investigacao Agraria (EAN), Oeiras (Portugal)
  2. Instituto Tecnologico e Nuclear (ITN), Sacavem (Portugal)
  3. Instituto Superior Tecnico (IST), Lisboa (Portugal)
Publication Date:
Dec 31, 1998
Product Type:
Conference
Report Number:
INIS-HU-001; CONF-980864-
Reference Number:
SCA: 553004; PA: AIX-30:000604; EDB-99:017298; SN: 99002052716
Resource Relation:
Conference: 9. Tihany symposium on radiation chemistry, Tata (Hungary), 29 Aug - 3 Sep 1998; Other Information: PBD: 1998; Related Information: Is Part Of 9. `Tihany` symposium on radiation chemistry. Programme and abstracts; PB: [162] p.
Subject:
55 BIOLOGY AND MEDICINE, BASIC STUDIES; DRYING; ELECTRON BEAMS; ELECTRON SPIN RESONANCE; FOOD PROCESSING; FRUITS; GAMMA RADIATION; IRRADIATION PROCEDURES; RADIATION DOSES
OSTI ID:
303712
Research Organizations:
Magyar Tudomanyos Akademia, Budapest (Hungary). Izotopintezete
Country of Origin:
Hungary
Language:
English
Other Identifying Numbers:
Other: ON: DE99611512; TRN: HU9820433000604
Availability:
INIS; OSTI as DE99611512
Submitting Site:
INIS
Size:
pp. O59
Announcement Date:
Feb 10, 1999

Citation Formats

Esteves, M P, Andrade, M E, and Empis, J. Detection of prior irradiation in dried fruits by electron spin resonance (ESR). Hungary: N. p., 1998. Web.
Esteves, M P, Andrade, M E, & Empis, J. Detection of prior irradiation in dried fruits by electron spin resonance (ESR). Hungary.
Esteves, M P, Andrade, M E, and Empis, J. 1998. "Detection of prior irradiation in dried fruits by electron spin resonance (ESR)." Hungary.
@misc{etde_303712,
title = {Detection of prior irradiation in dried fruits by electron spin resonance (ESR)}
author = {Esteves, M P, Andrade, M E, and Empis, J}
abstractNote = {Complete text of publication follows. Dried almonds, raisins, dates and pistachio were irradiated using gamma radiation and electron beam with an average absorbed dose of 5 kGy. The radiation treatment was detected by ESR spectroscopy. Different parts of the dried fruits were analysed as follows: almonds: skin; raisins: dried pulp (at 30 deg C for one week); dates: dried pulp (at 30 deg C for one week) and stone; pistachio: nutshell. A Bruker ECS 106 EPR Spectrometer, at a microwave power of 0.4 mW, at room temperature was used. The analysis were carried out 2-3 months and 6 months after irradiation. A series of signals, tentatively described as `cellulose-like`, `sugar-like` and `complex` were observed, and some slight differences between spectra recorded from samples irradiated with gamma and electrons were evident.}
place = {Hungary}
year = {1998}
month = {Dec}
}