Milk amino acid composition changing at sterilization by beta-radiationMilk amino acid composition changing at sterilization by beta-radiation

UDC 637.03

Krivonogova A.S., Baranova A.A., Moiseeva K.V., Krivonogov P.S., Molokova N.B., Isaeva A.G., Mochulskaia N.N., Suponkina A.N., Voinov V.S.

Summary. Currently, problem of producing quality food products became particularly urgent in connection with foreign policy terms. Requirements for animal products are legally defined, and accordance with these requirements is a condition of production release on the domestic market and the market of the Customs Union. Authors found that the adaptive reserve of animals is quite high, as evidenced by the high level of productivity and performance of reproduction. Changes manifested by depression of hematopoiesis, immune suppression, violation of protein metabolism occur in the process of adaptation of animals to environmental conditions. These changes affect the protein and amino acid composition of received milk. Authors assessed the amino acid composition of the milk subjected to radiation processing by beam of accelerated electrons at absorbed dose of 10 kG and studied bacterial contamination of radiation-processed milk to assess the sterilizing effect of the given dose.Tendency to increase of the content of most amino acids in the samples subjected to radiation processing, revealed by amino acid analysis of milk. Study of bacterial contamination of milk showed that the value of QMAFAnM in samples. irradiated with a pulsed electron beam at a dose of 9,7-10,2 kG did not exceed 1 × 102 CFU/g, with the normative value of the milk premium CFU less than 1 × 105 per gram. Thus, radiation processing of milk by beta-radiation at the dose of 10 kG and more ensure microbial contamination of milk on a level corresponding to the highest quality milk.

Keywords: milk, amino acid analysis, essential amino acids, livestock production safety, bacterial contamination, sterilization, beta-radiation, radiation processing.

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Author affiliation:

Krivonogova Anna S., Ph.D. in Biology, docent of the department of infectious and non-infectious pathology of the Ural State Agrarian University; 42, Karla Libknekhtast., Yekaterinburg, 620075; phone: 8 (343)371-33-63; e-mail: academy@ursaca.ru.

Baranova Anna A., Ph.D. in Biology, docent of the department of technology of production and processing of agricultural products of Ural State Agrarian University; 42, Karla Libknekhta st., Yekaterinburg, 620075; phone: 8 (343)371-33-63; e-mail: academy@ursaca.ru.

Krivonogov Pavel S., post-graduate student, senior lecturer of the department of mathematics and computer scienceof the Ural State Agrarian University; 42, Karla Libknekhta st., Yekaterinburg, 620075; phone: 8 (343)371-33-63; e-mail: academy@ursaca.ru.

Moiseeva Kseniia V., post-graduate student, assistant of the department of microbiology and virology of the Ural State Agrarian University; 42, Karla Libknekhtast., Yekaterinburg, 620075; phone: 8 (343)371-33-63; e-mail: academy@ursaca.ru.

Molokova Nina B., post-graduate student of the department of infectious and non-infectious pathology of the Ural State Agrarian University; 42, Karla Libknekhta st., Yekaterinburg, 620075; phone: 8 (343)371-33-63; e-mail: academy@ursaca.ru.

Mochulskaia Nataliia N., Ph.D. in Chemistry, docent of the department of immune-chemistry of the Institute of Chemical Technologyof the Ural Federal University named after the first President of Russia B.N.Yeltsin"; 19, Mira st., Yekaterinburg, 620002; phone: 8(912)2698245; e-mail: contact@urfu.ru.

Suponkina Anna N., post-graduate student of the Ural Federal University named after the first President of Russia B.N.Yeltsin"; 19, Mira st., Yekaterinburg, 620002; phone: 8(912)2698245; e-mail: contact@urfu.ru.

Voinov Viktor S., graduate student of the Ural Federal University named after the first President of Russia B.N.Yeltsin"; 19, Mira st.,Yekaterinburg, 620002; phone: 8(912)2698245; e-mail: contact@urfu.ru.

Responsible for correspondence with the editorial board: Isaeva Albina G., Ph.D. in Biology, senior scientific researcher of the Ural Scientific Research Veterinary Institute; 112a, Belinskogo st., Yekaterinburg, 620219; phone: 8(343) 2572044; e-mail: isaeva.05@bk.ru.