Definition of quality indicators of dairy-protein concentrates in the storage process

Gnitsevych, Victoriya and Гніцевич, Вікторія Альбертівна and Yudina, Tatiana and Юдіна, Тетяна Іллівна and Nykyforov, Radion and Никифоров, Радіон Петрович and Deinychenko, Liudmyla and Дейниченко, Людмила Григорівна and Nazarenko, Iryna and Назаренко, Ірина Анатоліївна (2018) Definition of quality indicators of dairy-protein concentrates in the storage process. EUREKA: Life Sciences (1). pp. 10-17.

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Abstract

The aim of this article is to investigate changes in the structure, color and microbiological parameters of milk-protein concentrates (MPC) made of buttermilk with the use of cranberry or viburnum purees in the process of storage. Necessary results were obtained after analyzing phase transitions, changes in color-parametric and microbiological characteristics of the studied products. Low-temperature phase transitions and their influence on the structure of MPC were investigated using the method of differential scanning calorimetry. This method was used to obtain information on the change in the temperature function, depending on the change in heat absorption typical for melting, crystallization, or glass transition of components of MPC. The obtained dependences indicated an increase of heat absorption leaps of concentrates in relation to control, which indicates an increase in the amount of bound moisture and, accordingly, a decrease in significant changes in the structure of concentrates in the process of storage. In addition, it was found that rational was the rapid freezing of MPC at a temperature of –20...–30 °C. The CIE XYZ and CIELab methods were used to evaluate the change in the color-parametric characteristics of MPC. According to the data obtained, red or yellow spectral tone dominates for the samples, but with an increase in the storage time, one can see a significant shift in the color of both concentrates towards the yellow color. It is also established that with increasing of storage time there is a gradual darkening of MPC. It was defined, that rational was the shelf life of up to 30 days from the time of studied products making. It was also determined that with the use of deep freezing of the MPC, the storage time has no significant effect on the development of the microflora

Item Type: Article
Uncontrolled Keywords: preservation of quality, milk-protein concentrates, differential scanning calorimetry, color-parametric characteristics; microflora; storage
Subjects: Research materials > Journal articles
Research materials > Journal articles > Food Technology
Divisions: Educational and Scientific Institute of Hospitality Industry and Tourism > Department of Technologies in Catering Business and Hospitality Industry
Depositing User: Адміністратор репозиторію
Date Deposited: 02 Jul 2018 07:10
Last Modified: 02 Jul 2018 07:11
URI: http://elibrary.donnuet.edu.ua/id/eprint/570

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