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Effect of gamma irradiation on microbial load, chemical and sensory properties of Sheesh Tawoq; Prepared chilled meal

Al-Bachir, M. (2010) Effect of gamma irradiation on microbial load, chemical and sensory properties of Sheesh Tawoq; Prepared chilled meal. Acta Alimentaria, 39 (1). pp. 81-89. ISSN 0139-3006

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Abstract

Locally prepared meal Sheesh Tawoq was treated with 0, 2, 4 or 6 kGy doses of gamma irradiation. Treated and untreated Sheesh Tawoq were kept in a refrigerator (1–4 °C). Microbiological, chemical and sensory characteristics of Sheesh Tawoq were evaluated at 0, 4, 8, 12, 16 and 20th week of storage. The results indicate that 4 and 6 kGy doses of gamma irradiation decreased the total counts of mesophilic aerobic bacteria, total coliform and yeast. Thus the microbiological shelf-life of Sheesh Tawoq was significantly extended from 12 weeks (control) to more than 20 weeks (samples treated with 4 or 6 kGy). Irradiation doses did not have a significant effect on the major constituents of Sheesh Tawoq (moisture, protein and fats). The radiation doses required to reduce the microorganisms load one log cycle (D10) in Sheesh Tawoq were 435 and 385 Gy for the Salmonella and E. coli, respectively. The chemical parameters, total acidity and volatile basic nitrogen, which were chosen as the indices of freshness, were all well within the acceptable limit for up to 12 weeks for Sheesh Tawoq treated with 0 and 2 kGy, and for up to 20 weeks at 1–4 °C for samples treated with 4 and 6 kGy. Sensory evaluation showed no significant differences between irradiated and non-irradiated samples.

Item Type: Article
Subjects: Q Science / természettudomány > QD Chemistry / kémia > QD01 Analytical chemistry / analitikai kémia
Depositing User: xKatalin xBarta
Date Deposited: 10 Feb 2017 09:29
Last Modified: 10 Feb 2017 09:29
URI: http://real.mtak.hu/id/eprint/48036

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