Жарияланымдар / Публикации

Постоянный URI для этого сообществаhttps://cris.qyzpu.kz/handle/123456789/2

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Автор: search.filters.author.Nurgul MamytovaТема: search.filters.subject.phenolic compounds

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    BIOLOGICAL FEATURES OF MEDICINAL PLANT ELAEAGNUS RHAMNOIDES GROWING AT SOUTH-EAST OF KAZAKHSTAN
    (2020-12-20)
    Mereke Kassimbekova
    ;
    Anar KALIYEVA
    ;
    Bekbossyn Kassymbayev
    ;
    Г. Ж. Медеуова
    ;
    Nurgul Mamytova
    Elaeagnus rhamnoides berries contain significant amounts of bioactive vitamins, lipids, carotenoids, and phenolic compounds. They are widely used as an ingredient in functional products, cosmetics, and pharmaceutical formulations to prevent and treat cardiovascular, stomach, skin, and liver diseases. Natural sea buckthorn populations are widespread in Kazakhstan. Data on phytochemical and diagnostic indicators are absent for E. rhamnoides growing in Kazakhstan. In this work, seaberry from Kazakhstan was surveyed for diagnostic indicators, lipophilic and hydrophilic compounds. Analyses were conducted for main diagnostic indicators of leaves and fruits by standard microtechniques; fatty acid profiles by gas-chromatography; β-carotene by HPLCPDA; vitamin C and B by capillary electrophoresis, and pectin substances by titration. The main diagnostic indicators of leaves were stomatal anomocytic complex; corymbose and stellate hairs; conductive bundle - closed collateral; fruits - secretory passages and conducting bundles of a spiral type in the pulp parenchyma, and a large amount of fatty oil and aleuron grains in the embryo. In the oil from berry pulp/peel, the dominating fatty acids were palmitoleic and palmitic (28.53 and 30.03 %, respectively). Sea buckthorn seed oil, with its high a-linolenic levels and a near 1:1 ratio of ω-6:ω-3 fatty acids, represented a very balanced source of polyunsaturated fatty acids for human health and nutrition. β-Carotene content was 7.75 mg per kg, pectin substances – 3.27 %. In addition, the berries were rich in vitamins B complex (0.0035-0.014 mg/100g) and vitamin C (0.21 mg/100g). This work constitutes the first approach on knowledge about the phytochemical profile of Elaeagnus rhamnoides fruits from Kazakhstan and provides arguments multiple using of E. rhamnoides, both for fresh consumption and for industrial preparations in the form of jams and related products (functional multivitamin food) as well as byproducts (seeds) as raw materials for the production of oils suitable to be marketed by the pharmaceutical, cosmetic and food industries.
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    Adaptation Features of Gentiana tianschanica Rupr. Populations to Environmental Factors in Kazakhstan
    (2024-01-01)
    Бекзат Тыныбеков
    ;
    Moldir Imanaliyeva
    ;
    Askhat Kuatbayev
    ;
    Gulmira Satybaldiyeva
    ;
    Elmira Boribay
    The study investigates the current state, floristic composition, and ecological characteristics of Gentiana tianschanica populations in the Ile-Alatau region, part of the Ile-Alatau National Park, Kazakhstan.Gentiana L., an ancient boreal genus, includes 31 species in Kazakhstan, such as the endemic Gentiana dschungarica.Known for medicinal uses, especially for gastrointestinal and urogenital disorders, interest in gentians has risen for ornamental and pharmacological applications.Nine natural populations of G. tianschanica were studied in diverse ecological and phytocoenotic conditions of the Ile-Alatau mountains.Soil analyses revealed significant differences in the physicochemical properties of the species' habitats.In the Kimasar Gorge, mountain-meadow chestnut soils with a light loamy texture were observed, while the Big Almaty Gorge featured dark chestnut soils rich in humus (7.36-18.78%)and nutrients such as nitrogen (120.4-140.0mg/kg), phosphorus (58-98 mg/kg), and potassium (470-1000 mg/kg).These findings emphasize the species 'adaptation to varying altitudinal and climatic zones.Phytochemical analysis showed G. tianschanica is rich in bioactive compounds, including phenolics, bitter glycosides, flavonoids, and alkaloids.Total phenol content reached 1567.17-9008.20mg of gallic acid/100 g, with the highest levels in leaves.Flavonoids (up to 1358.25 mg catechin/100 g) and vitamin C (up to 244.7 mg/100 g) were significant.Syringic acid (1685.8mg/100 g), quercetin (317.4 mg/100 g), and chlorogenic acid (237.5 mg/100 g) highlighted antioxidant and antiinflammatory potential.The antioxidant activity, particularly in leaves, reached 530.30 mg Trolox/100 g.Anthropogenic threats, including overgrazing and habitat disturbance, have led to declining populations, necessitating conservation strategies like habitat monitoring, protective regimes, and sustainable medicinal plant use.This study underscores the ecological and phytochemical significance of G. tianschanica, which is vital for biodiversity conservation and pharmaceutical development.
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