A.P. Chernyaev – Dr.Sc.(Phys.-Math.), Head of Department of Physics of Accelerators and Radiation Medicine, 

Faculty of Physics, Lomonosov Moscow State University; 

Head of Laboratory of Beam Technologies and Medical Physics, 

Skobeltsyn Institute of Nuclear Physics of Lomonosov Moscow State University

E-mail: a.p.chernyaev@yandex.ru

V.M. Avdyukhina – Ph.D.(Phys.-Math.), Associate Professor, 

Department of Solid State Physics, Faculty of Physics, Lomonosov Moscow State University

E-mail: vmaphys@gmail.com

U.A. Bliznyuk – Ph.D.(Phys.-Math.), Senior Lecturer, 

Department of Physics of Accelerators and Radiation Medicine, Faculty of Physics, Lomonosov Moscow State University

E-mail: uabliznyuk@gmail.com

P.Yu. Borschegovskaya – Ph.D.(Phys.-Math.), Assistant, 

Department of Physics of Accelerators and Radiation Medicine, Faculty of Physics, Lomonosov Moscow State University

E-mail: alexeevapo@mail.ru

I.K. Gordonova – Leading Research Scientist, 

All-Russian Scientific Research Institute of Medicinal and Aromatic Plants (Moscow)

E-mail: nikitinaz@yandex.ru

S.A. Zolotov – Undergraduate, 

Department of Physics of Accelerators and Radiation Medicine, Faculty of Physics, Lomonosov Moscow State University

E-mail: zolotov.sa15@physics.msu.ru

V.S. Ipatova – Undergraduate, 

Department of Physics of Accelerators and Radiation Medicine, Faculty of Physics, Lomonosov Moscow State University

E-mail: vikki@dolg.su

V.A. Leontiev – Student, 

Department of Physics of Accelerators and Radiation Medicine, Faculty of Physics, Lomonosov Moscow State University

E-mail: vleon-98@yandex.ru

Z.K. Nikitina – Dr.Sc.(Biol.), Main Research Scientist, 

All-Russian Scientific Research Institute of Medicinal and Aromatic Plants (Moscow)

E-mail: nikitinaz@yandex.ru

V.V. Rozanov – Dr.Sc.(Biol.), Professor, 

Department of Physics of Accelerators and Radiation Medicine, Faculty of Physics, Lomonosov Moscow State University;  Main Research Scientist, All-Russian Scientific Research Institute of Medicinal and Aromatic Plants (Moscow)

E-mail: vrozanov@mail.ru

F.R. Studenikin – Post-graduate Student, 

Department of Physics of Accelerators and Radiation Medicine, Faculty of Physics, Lomonosov Moscow State University

E-mail: f.studenikin@gmail.com

O.V. Shinkarev – Student, 

Department of Physics of Accelerators and Radiation Medicine, Faculty of Physics, Lomonosov Moscow State University

E-mail: shinkaryov-oleg@mail.ru

D.S. Yurov – Ph.D.(Phys.-Math.), Research Scientist, 

Skobeltsyn Institute of Nuclear Physics of Lomonosov Moscow State University

E-mail: dyurov88@mail.ru

To control of microbiological parameters of foodstuff without a negative impact on the quality is a current topic of research at Moscow State University, Physics Department. Considering that traditional treatment methods include the use of different chemicals, preservatives and supplements which can potentially inflict harm on human health, the global community of scientists tend to adhere to alternative methods such as irradiation treatment. This study is to research the impact of 1 MeV electrons at different doses on microbiology of chilled turkey. The algorithm of dose estimation used in the study allows to simulate the passage of accelerated electrons through food substance taking into account all physical processes that occur during irradiation.

An experiment was conducted using an electron treatment method on two types of chilled turkey samples. The first type was 0.5 ml minced turkey homogenate placed in 2 ml Eppendorf tubes. After irradiation homogenate was used to estimation microbiological parameters of minced trout on the second day after treatment. The second type of samples was thin slices of turkey in vacuum bags.

They were used to estimation organoleptic parameters such as the changes in taste, odor, and texture of chilled turkey after irradiation.

Samples were treated by 1 MeV electron beam using the industrial electron accelerator UELR-1-25-T-001. Film dosimetry was used to control the absorbed dose of the samples. Computer simulation using GEANT4 code was performed to estimate the dose absorbed in trout taking into account technical characteristics of the UELR-1-25-T-001 accelerator as well as the parameters of irradiation. Dose rate was determined as 5.4 Gy/sec. The absorbed doses of the turkey homogenate were: 0.25, 0.5, 1, 2, 3, and 6 kGy and of the slices of turkey were: 0.25, 0.5, 1, 2, 3, 6, 10 and 20 kGy.

Estimation of microbiological and organoleptic parameters shows that the doses used for irradiation treatment of chilled turkey should not exceed 2 kGy. Doses more 1 kGy have proved to be efficient in bacterial growth inhibition, while at 6 kGy a complete sterilization of the product was observed. However, doses more 2 kGy have been significant impact on organoleptic properties of treated turkey. Therefore, for effective radiation treatment of this type of product, a dose range of 1 to 2 kGy is well suited.

Computer simulation allows not only to determine the dose absorbed by the product, but also to solve the inverse problem, namely, by the given parameters of the dose range for a given type of product, the dose distribution by the product volume and the permissible dose rate, to determine the input parameters of radiation processing, such as energy of electron, beam current, time of irradiation and the value of the charge absorbed by the product during irradiation.

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