2 research outputs found
Bioecological features of Nigella sativa L. in different conditions of Uzbekistan
The article is devoted to the study of bio-ecological features of black caraway (kalonji) in different conditions of introduction. The analysis of the periods of ontogenesis, the biology of flowering, fruiting (seed productivity) in different conditions of Uzbekistan was carried out. By results of phenological researches the differences of terms of phases of the vegetative period and its turn, by morphometric parameters are revealed. Emergence of buds in Nigella sativa under conditions of introduction is observed in the first decade of May, sometimes in the middle of May, depending on weather conditions of the year. The earliest flowering was on 18.05, the latest on 29.05. Fruiting takes place in early June to late June. The end of the growing season is observed in late June-early July. The duration of vegetation in Malguzar is 130-35 days, while in Botanical Garden it is 135-145 days. The real seed production per plant averages 51.9±3.94 in Botanical Garden conditions and 42.5±2.10 in Malguzar
Isolation and study of a bioactive extract enriched with anthocyanin from red grape pomace (Cabernet Sauvignon)
Received: February 6th, 2023 ; Accepted: May 7th, 2023 ; Published: July 25th, 2023 ;
Correspondence: [email protected] pomace is a natural product rich in dietary fibers, polyphenols and anthocyanidins.
By their chemical composition, secondary products from grape processing are valuable raw
materials for obtaining a variety of new products. Recently, in food biotechnology, fermented and
unfermented grape pomace have undergone a deeper study of the role of additives in dry powders
or extracts. The quality and biological value of natural food products are determined by their
chemical composition and a whole complex of integral organoleptic properties that depend on this
composition. Natural anthocyanin dyes not only give color to vegetable raw materials, but also have
a well-known physiological activity, in particular, coloring and antioxidant. Purified natural dyes
have recently been increasingly used to improve the consumer properties of food products, in
biologically active additives, in pharmaceutical preparations for the treatment and prevention of
various diseases. At the same time, the composition of anthocyanins, even for the same variety of
plant raw materials, is complex and variable; it depends on climatic conditions, on the maturity of
berries, root crops, and the quality of agricultural work. Anthocyanins easily undergo a number of
transformations depending on the conditions of extraction and analysis.
The originality and novelty of the isolation and production of biologically active extracts with
antiradical properties from by-products of local wineries in ecologically safe areas of southern
Kazakhstan lies in the fact that natural environmental conditions: high temperatures and
low humidity which contribute to the formation of biologically active substances with
increased concentrations. Current research was aimed at the deep study of extracts from grape
pomace rich - anthocyanins.
Red grape pomaces of Vitis vinifera L. Cabernet Sauvignon were extracted using a solvent-based
(SE) method with concentrations of 70% v/v and solid/liquid ratios of 1:10, followed by
incubation at three different temperatures of 30 °C, 40 °C, and 50 °C for 1 h, 2 h, 3 h, and 4 h.
All solvent extracts showed higher amounts of anthocyanin pigments. The maximum yield was
obtained by using the optimal time of extraction (2 h at 50 °C), with the highest total anthocyanin
recovery obtained by means of 70% ethanol. The anti-radical and toxic effects of the obtained
extract (anthocyanin) were studied