RADIATION & RISK
Bulletin of the National Radiation and Epidemiological Registry
since 1992
About the Journal : 2017 : vol. 26, No. 2 : Influence of dose characteristics on efficiency of electron beam sterilization of fish preserves

Influence of dose characteristics on efficiency of electron beam sterilization of fish preserves

«Radiation and Risk», 2017, vol. 26, No. 2, pp.97-106

DOI: 10.21870/0131-3878-2017-26-2-97-106

Authors

Polyakova I.V.1 – Researcher. All-Russian Scientific Research Institute of Radiology and Agroecology, Obninsk.
Kobyalko V.O.1 – Lead. Lead. Researcher, C. Sc., Biol. All-Russian Scientific Research Institute of Radiology and Agroecology, Obninsk.Contacts: Kievskoe Sh., 109 km, Obninsk, Kaluga region, Russia, 249032. Tel.: (484) 399-69-38; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. .
Sarukhanov V.Ya.1 – Senior Researcher, C. Sc., Biol.All-Russian Scientific Research Institute of Radiology and Agroecology, Obninsk.
Koz'min G.V.1 – Lead. Researcher, C. Sc., Biol. All-Russian Scientific Research Institute of Radiology and Agroecology, Obninsk.
Frolova N.A.1 – Researcher, C. Sc., Biol. All-Russian Scientific Research Institute of Radiology and Agroecology, Obninsk..
Lykov I.N.2 – Director of Institute of Natural Sciences, D. Sc., Biol., Prof. Tsiolkovsky State University, Kaluga.
Voronin L.A.3 – Senior Researcher, C. Sc., Tech. Budker Institute of Nuclear Physics, Novosibirsk.

Abstract

In previous paper we reported that maximum efficiency of gamma-ray sterilization of fish preserves, that does not influence the product quality, is at the dose rate of 1.5 Gy/s and absorbed dose of 6 kGy. However, effect of increase in the dose rate by two or more orders on optimal antibacterial dose and the product quality level is still not known. In this paper we present data on influence of dose rate and absorbed dose on efficiency of electron beam sterilization of fish preserves. Fish preserves were prepared 5 days before electron processing. For e-beam irradiation the impulse electron accelerator ILU-10, produced by the Budker Institute of Nuclear Physics in Novosibirsk was used. The energy of the accelerator is 5 MeV, delivered doses ranged from 1.5 to 6.0 kGy. Unirradiated preserves were used as control. The product was kept at the temperature ranged from +5 to +8 °С. Irradiated samples were tested on the 10th, 95th and 185th days after electron beam processing. On the 15th day after preparing the total content of mesophilic aerobic and facultative anaerobic microorganisms and yeast in the control samples was 100 times and 1.5 times higher than the norm, respectively, concomitant early imbalance of organoleptic indicators was observed. At the same time, all indicators in sterilized samples were within normal limits. Maximum antibacterial effect was at the radiation dose of 6.0 kGy. During the storage no deterioration was observed. Results of the study allow us to conclude that electron beam irradiation of fish preserve at 3-6 Gy using electron accelerator does not cause deterioration of the quality of preserves, guarantees their microbiological safety and extends their shelf life.

Key words
Irradiation, multicomponent food products, electron beam, the electron accelerator, γ-radiation, fish preserves, microbiological safety, sanitation standards, the extension of shelf life, sterilization.

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Full-text article (in Russian)