THE INFLUENCE OF ACCELERATED 1 MeV ELECTRON BEAM ON MICROBIOLOGICAL
PARAMETERS OF CHILLED TROUT
U.A. Bliznyuk, P.Yu. Borschegovskaya, F.R. Studenikin, A.P. Chernyaev
Lomonosov Moscow State UniversityPhysics Department
RADIATION TREATMENT
Bacteria D10
(kGy)
E. Coli 0.15 - 0.35
Proteus vulgaris 0.10 - 0.20
Shigella 0.25 - 0.40
Salmonella (7 serotypes) 0.50 - 1.0
Streptococcus faecalis 0.75 - 1.0
Staphylococcus aureus 0.80 - 1.90
Foodstuff D (kGy) Temperature(°C)
Period of storage (days)
Anchovy - +3 13
Anchovy 2 +3 17
Sea bass - -4 13
Sea bass 5 -4 17
Coregonus - +3 7
Coregonus 1.22 +3 20
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LOMONOSOV MOSCOW STATE UNIVERSITY
IRRADIATION
Food irradiation technology Gamma irradiation technology
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LOMONOSOV MOSCOW STATE UNIVERSITY
Purpose of researchStudying the impact of 1 MeV accelerated electron beam on the amount of mesophilic, aerobic microorganisms, facultative and anaerobic microorganisms in chilled trout
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Goals1. Computer simulation of the experiment using source code Geant 42. Irradiation of chilled trout in different doses3. Monitoring microbiological parameters
LOMONOSOV MOSCOW STATE UNIVERSITYGOALS
Irradiation of chilled trout
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Electron energy 1 МэВ, beam current up to 11,5 μA
Accelerator tube
Scanning magnet
Scannerchamber
8 mm Fish
LOMONOSOV MOSCOW STATE UNIVERSITY
Accelerator UELR-1-25-T-001
ACCELERATOR
Chilled trout after irradiation
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LOMONOSOV MOSCOW STATE UNIVERSITYFINDINGS
0 Gy
20 Gy
200 Gy
2 kGy
6 kGy
20 kGy
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COMPUTER SIMULATION
The absorbed dose distribution in each 1 mm layer of water phantom
LOMONOSOV MOSCOW STATE UNIVERSITY
CONCLUSION
It was determined that the amount of microorganisms and bacteriadecreased with the increase of irradiation dose from 20 Gy to 20 kGy.Notably, the content of microorganisms in irradiated samples wasconsiderably lower than in non-irradiated samples with the increase in timebetween irradiation and post-irradiation monitoring. Chilled trout treatedwith 6 kGy and higher changed its organoleptic properties.
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LOMONOSOV MOSCOW STATE UNIVERSITY
