The effect of the conservation process on the histochemical parameters of special raw materials

Background. One of the most important products of the slaughter of farm animals is endocrine-enzymatic or special raw materials, as they are significant sources of biologically active substances. The method of using for medicinal purposes organ preparations made from organs and tissues of animals is called "organotherapy". Most of these organ preparations are widely used in the treatment of a number of diseases. It is obvious that the quality of organ preparations depends not only on the type, age and conditions of animals, but also on the subsequent technology of processing and storage of raw materials. In production, to extend the shelf life of slaughter products, various preservation methods are used. One of the traditional ways of canning is the freezing process.
Purpose. This paper presents studies of the physicochemical and morphological structures of organ preparations, using the thymus and brain of cattle as an example, during storage at low temperatures.
Materials and methods. At the first stage, tests were carried out using laboratory methods, characterizing the effect of freezing on the quality indicators of raw materials. From the results obtained, it can be seen that the physicochemical parameters of the studied samples are not the same.

Results. As the results of the experiment showed, in frozen samples of organs, the moisture content increased within 3%. At the second stage, the morphological structure of the organs was determined during cold treatment. During the experiment, it was found that the studied samples undergo changes in the histological structure, in comparison with the original sample, namely: the formation of damage, loosening of tissue layers, the formation of microvoids in the form of ice crystals.
Conclusions. The obtained results of the impact of the freezing process on the studied organ preparations indicate that this method of conservation allows for a long time to preserve the value of biological raw materials without losing its basic qualities.

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