Assessment of radiation sensitivity of fresh-cut vegetables using electrolyte leakage measurement

Auteur(s) :
Fang X., Sokorai KJB.
Date :
Mai, 2005
Source(s) :
POSTHARVEST BIOLOGY AND TECHNOLOGY. #36:2 p191-197
Adresse :
Addresses: Fan XT (reprint author), USDA ARS, Eastern Reg Res Ctr, 600 E Mermaid Lane, Wyndmoor, PA 19038 USA USDA ARS, Eastern Reg Res Ctr, Wyndmoor, PA 19038 USA E-mail Addresses: xfan@errc.ars.usda.gov Publisher: ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, http://www.elsevier.com Discipline: AGRICULTURE/AGRONOMY

Sommaire de l'article

A study was carried out to assess the use of electrolyte leakage measurement to evaluate radiation sensitivity of 13 freshcut vegetables, and correlated radiation sensitivity with endogenous antioxidant capacity. Fresh-cut vegetables were gamma irradiated at doses up to 3 kGy at 0.5 kGy intervals. Electrolyte leakage of the samples was measured following irradiation. Electrolyte leakage increased linearly with higher radiation dose for all vegetables. The radiation sensitivity, judged from the rates of the increase in electrolyte leakage as a function of radiation doses and from the doses that increased electrolyte leakage by 50% over the non-irradiated controls varied among vegetables. Red cabbage, broccoli and endive had the highest radiation resistance while celery, carrot and green onion were the most sensitive to radiation. The radiation sensitivity was not necessarily correlated with endogenous antioxidant capacity or phenolics content of the vegetables, which showed large variation among the test samples. Electrolyte leakage may be a useful tool to predict a given product’s ability to tolerate irradiation. © 2004 Elsevier B.V. All rights reserved.

Source : Pubmed
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