Tag Archives: antioxidants

1293-1303 Z. Shakiryanova, R. Khegay, U. Gayibov, A. Saparbekova, Z. Konarbayeva, A. Latif and O. Smirnova
Isolation and study of a bioactive extract enriched with anthocyanin from red grape pomace (Cabernet Sauvignon)
Abstract |
Full text PDF (887 KB)

Isolation and study of a bioactive extract enriched with anthocyanin from red grape pomace (Cabernet Sauvignon)

Z. Shakiryanova¹, R. Khegay¹, U. Gayibov², A. Saparbekova¹, Z. Konarbayeva¹, A. Latif¹ and O. Smirnova³

¹M.Auezov South Kazakhstan University, Faculty of Chemical Engineering,
and Biotechnology Department of Biotechnology, Tauke khan avenue 5, KZ160000 Shymkent, Kazakhstan
²Academy of Sciences of Uzbekistan, Institute of Bioorganic Chemistry,
M. Ulugbek street 83, UZ100125 Tashkent, Uzbekistan
³HSE University, HSE Campus in St. Petersburg, School of Arts and Humanities, Department of Foreign Languages, 3 Kantemirovskaya Str., RU194100 Saint Petersburg, Russia
*Correspondence: zulya_sun@mail.ru

Abstract:

Grape 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.

Key words:

, , , , ,




39-61 H.M.S. El-Bassiouny, M.M.S. Abdallah, N.M. Al-Ashkar and B.A. Bakry
Potential impacts of chitosan on growth, yield, endogenous phytohormones, and antioxidants of wheat plant grown under sandy soil conditions
Abstract |
Full text PDF (378 KB)

Potential impacts of chitosan on growth, yield, endogenous phytohormones, and antioxidants of wheat plant grown under sandy soil conditions

H.M.S. El-Bassiouny¹, M.M.S. Abdallah¹, N.M. Al-Ashkar¹ and B.A. Bakry²

¹Botany Department, Agricultural and Biological Research Institute, National Research Centre, 33 El Bohouth Street P.O. 12622. Dokki, Giza, Egypt
²Field Crops Research Department, Agricultural and Biological Research Institute, National Research Centre, 33 El Bohouth Street P.O. 12622. Dokki, Giza, Egypt
Corresponding author: maha_eg1908@yahoo.fr

Abstract:

A field experiment was carried out in sandy soil, during two winter successive seasons to study the impacts of different concentrations of chitosan (50, 100 & 150 mg L-1) on several growth parameters and biochemical changes as well as quantitative and qualitative grain yield. Foliar treatment of chitosan significantly increased the growth parameters concurrently with an increment in the photosynthetic pigments, total soluble sugar, proline, free amino acid total carbohydrates, antioxidant activities, phenol, flavonoids, and some minerals nutrition of wheat plant. Wheat plants treated with chitosan at different concentrations significantly increased different endogenous phytohormones auxins (IAA), abscisic acid (ABA), gibberellins (GAs), and cytokinins (Cyt), as compared with the untreated plants. Moreover, chitosan concentrations induced significantly increments in grains yield, nutritive values, carbohydrates %, proteins %, antioxidant compounds and macronutrients of the grain yield. Cultivation of wheat plants under sandy soil conditions and treated with foliar application of 100 mg-1 chitosan gave the higher values of the grain yield as well as the nutritional values contents.

Key words:

, , , ,




1271–1283 N.V. Barakova, N.N. Skvortsova and N.Y. Sharova
Extraction of biologically active compounds from fruit, berry and grain Grist using ViscoStar 150L enzyme complex
Abstract |
Full text PDF (496 KB)

Extraction of biologically active compounds from fruit, berry and grain Grist using ViscoStar 150L enzyme complex

N.V. Barakova¹*, N.N. Skvortsova¹ and N.Y. Sharova²

¹International Research Centre ‘Biotechnologies of the Third Millennium’, ITMO University, St. Lomonosova 9, RU 191002 Saint-Petersburg, Russian Federation
²Federal State-Funded Scientific Establishment ‘All-Russia Research Institute for Food Additives’ (FGBNU VNIIPD), Chair of Food Microingredients’ Processing, 55 Liteinii ave., RU 191014 Saint-Petersburg, Russian Federation
*Correspondence: n.barakova@mail.ru

Abstract:

 This work aimed to evaluate the efficiency of treating plant tissue with enzymatic agent ViscoStar 150L for the extraction of biologically active compounds. In the current study the screening of extraction methods from citrus fruit peels (grapefruit, lemon, orange) was performed. The samples treated with enzymatic agent ViscoStar 150L showed better extraction results than the traditional ethanol/water extraction method. Citrus peels’ extracts assayed for antioxidant activity (determined as ferric reducing antioxidant power – FRAP) decreased in the following order: grapefruit > orange > lemon. The enzymatic agent ViscoStar 150L proved to have a positive synergic effect on juice yield from cowberry previously treated with a complex pectolytic enzymatic agent. The enzymatic agent ViscoStar 150L proved to have a synergic effect on grain grist mashes previously treated with an amylolytic enzymatic agent, the inhibitor activity of the compounds produced by actinomycetic microorganisms grown on substrates based on these mashes being higher than that of previously known inhibitors.

Key words:

, , , ,