Қазақ ұлттық қыздар педагогикалық университеті / Казахский национальный женский педагогический университет

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Автор: search.filters.author.Gulzira Izmukhanovna YernazarovaТема: search.filters.subject.microalgae

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    МИКРОБАЛДЫРЛАРДЫҢ МОНО- ЖӘНЕ АРАЛАС ДАҚЫЛДАРЫНЫҢ ФИЗИОЛОГИЯЛЫҚ КӨРСЕТКІШТЕРІНЕ ХРОМНЫҢ ӘСЕРІ / Влияние хрома на ростовые показатели микроводорослей в моно- и смешанных культурах
    (2015-01-01)
    Gulzira Izmukhanovna Yernazarova
    ;
    Aliya Amangeldievna Ramazanova
    The publication was to identify the main indicators of growth and development of cell cultures of microalgae. In algocenosis seasonal succession, accompanied by the change of the dominant species, are not fully understood phenomenon. In additional study of interspecies interaction in the presence of damaging factors may contribute to clarify the direction of growth processes in algocenosis. The study determined the growth rates of cell cultures and dry and wet biomass on growth parameters and cell concentration. In this regard, the microalgae is a test object to determine the contaminated wastewater and monitoring to detect toxicity reservoirs. To determine the toxic effect of concentrates was introduced into an aqueous environment potassium dichromate.
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    Absorption of chromium by mono- and mixed cultures of microalgae
    (Al-Farabi Kazakh National University, 2018-01-01)
    Gulzira Izmukhanovna Yernazarova
    ;
    Svetlana Kazbekovna Turasheva
    ;
    Акмарал Сартаева
    ;
    B. Orazova
    ;
    Aliya Bazargaliyeva
    In the article the sorption ability of microalgae cultures to chromium are discussed. The objects of the study were microalgae from the collection of the Department of Biotechnology of Al-Farabi Kazakh National University, related to cyanoprokaryotes (Cyanoprocaryota/ Cyanobacteria): Anabaena flosaquae, Anabaena arnoldii, Nostoc linckia, Calothrix pariethina as well as their two-species mixtures A. flos-aquae х C. pariethina, N. linckia х C. pariethina, A. flos- aquae х N. Linckia, A. flos-aquae х A. arnoldii and Scenedesmus quadricauda. Also two green (Scenedesmus quadricauda and Chlorhormidium sp.) and one diatomaceous (Nitzshia sp.) algae were studied. The duration of cultivation was 20 days. Potassium bichromate was added to the nutrient medium at concentrations 0.01-0.2 mg/ml calculated per unit of chromium. The concentration of chromium in the filtrates of the studied cultures in some cases significantly decreased by the end of the cultivation period, which indicates the biosorption of this element by the microalgae cells. The investigated strains of microalgae absorb chromium from the medium in varying degrees. The most active biosorbents among the explored cultures were A. flos-aquae, N. linckia and C. рariethina. A microalgae A. arnoldii extracts chromium from the medium in smaller quantities. The listed strains refer to cyanoprokaryotes (cyanobacteria), from other cultures, the Scenedesmus quadricauda absorbs chromium quite actively. The highest intensity of chromium biosorption is characteristic of Nostoc (N. linckia), which extracts from the medium 60.8-74.6% chromium at initial concentrations 0.05-0.1 mg/ ml respectively. The most active biosorbents of chromium were four species of Cyanobacteria. In this regard, these strains have been selected by us for future study of the processes of sorption and metabolic activity in mono- and mixed cultures of microalgae.
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    Nutritive and Prebiotic Potentials of Chlorella and Scenedesmus Microalgae
    (2026-01-01)
    Gulzira Izmukhanovna Yernazarova
    ;
    С. К. Кабдрахманова
    ;
    Svetlana Kazbekovna Turasheva
    ;
    А.А. Ramazanova
    ;
    Khaiyrnisa Aisakulova
    We investigated the prebiotic properties of Chlorella sp. and Scenedesmus sp.microalgae based on the analysis of their extracts.We used High-performance liquid chromatography (HPLC) and Fourier transform infrared spectroscopy (FTIR) for chemical characterisation of extract composition.Using HPLC at 272 nm, the flavonoid naringenin was identified in the extract at a concentration of 1.343