| Autor: |
Sultanova, Madina, Abdrakhmanov, Khamza, Akzhanov, Nurtore, Saduakas, Aigerim, Nurysh, Aida |
| Předmět: |
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| Zdroj: |
Journal of Hygienic Engineering & Design; 2022, Vol. 40, p160-164, 5p |
| Abstrakt: |
The physico-chemical properties of the walnut kernel have been sufficiently studied, which cannot be said about the properties of the walnut shell. Conducting research in the field of creating a preventive product from walnut waste is relevant. The purpose of our work was to study the chemical composition of the shell and the prospects of its use in the framework of waste-free technology for processing walnut fruits. Samples of the three most common walnut varieties ("Ak-Terek peaked'; "Uygur" and "Kazakhstan") in the Republic of Kazakhstan that meet the requirements of GOST-16832-71 - for walnuts technical specifications were selected for research. The walnut shell was crushed to obtain a powder and thoroughly mixed. Amino acids were determined using the method of high-performance liquid chromatography. The study of phenolic compounds, flavonoids and antioxidant activity of nut shells was carried out on a Shimadzu 1240 spectrophotometer. Total phenolic compounds were determined by the Folin-Ciocalteu method at a wavelength of 750 nm. Thus, the conducted studies have shown that the walnut shell has a high nutritional value. Using qualitative reactions, the presence of biologically active substances such as quercetin, catechin and proanthocyanidins, has been proven. Studies have shown a fairly rich amino acid composition of walnut shells. The content of quercetin in walnut shell ranges from 0.945 mg to 1.51 mg, catechin - from 2.46 mg to 12.07 mg, tannins - from 611.32 mg to 805.62 mg. The content of proanthocyanidins in walnut shells was similar in 3 varieties. The insertion of additives from walnut waste into food formulations will significantly increase the nutritional value of the finished product. Since walnut shells are used in folk medicine for the treatment and prevention of various diseases, the products obtained by the developed technology may be used in the production of biologically active additives, the market of which is increasing annually, and the products of this direction have increased demand from the end consumer. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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