Effect of gamma irradiation on microbiological and nutritional properties of the freeze-dried berries

• Autorzy: Mašić Slobodan , Vujčić Ivica

Identyfikatory

DOI

10.2478/nuka-2021-0032

• Konferencja: International Conference on Development and Applications of Nuclear Technologies NUTECH-2020 (04–07.10.2020; Warsaw, Poland)
• Języki publikacji: EN

Abstrakty

EN

Lyophilization or freeze-drying is the technique of removing ice or other frozen solvents from a material through sublimation and the removal of bound water molecules through the process of desorption. Drying occurs in an absolute vacuum at temperatures from –40°C to –50°C. This technique is often used for the conservation of fruits, especially berries. During this process, the water changes from frozen to gaseous, with no thawing. Due to low temperatures and the high vacuum, most microorganisms are rendered inactive during the lyophilization process. However, ifthere is a necessity to destroy all microorganisms from treated food, subsequent irradiation with gamma rays is an appropriate method. This paper investigated the influence of different doses of gamma radiation on lyophilized berries’ microbiological characteristics. It was shown that the radiation dose of 7 kGy is suffi cient to eliminate the total number of microorganisms (excluding molds) to the extent that the number falls below the permitted limit according t o the law on the microbiological safety of foodstuffs of the Republic of Serbia, and 5 kGy is enough for molds to be rendered inactive. It was also concluded that gamma irradiation does not affect the nutritional value of lyophilized berries.

Słowa kluczowe

EN

freeze-drying; gamma irradiation; lyophilization; microbiological properties; nutritional properties

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2021
• Tom: Vol. 66, No. 4
• Strony: 221--225
• Opis fizyczny: Bibliogr. 21 poz., rys.

Twórcy

autor

Mašić Slobodan

• Vinca Institute of Nuclear Sciences – National Institute of the Republic of Serbia, University of Belgrade Department of Radiation Chemistry and Physics P. O. Box 522, 11001 Belgrade, Serbia

• https://orcid.org/0000-0003-3612-5262

autor

Vujčić Ivica

• Vinca Institute of Nuclear Sciences – National Institute of the Republic of Serbia, University of Belgrade Department of Radiation Chemistry and Physics P. O. Box 522, 11001 Belgrade, Serbia

• https://orcid.org/0000-0003-2379-9022

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).