Қазақ ұлттық қыздар педагогикалық университеті / Казахский национальный женский педагогический университет

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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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Effect of Chromium and Other Heavy Metals on Microalgae
(2018-01-03)
Gulzina Yernazarova
;
Svetlana Kazbekovna Turasheva
;
Gulnur Omarova
This article is devoted to the identification of physiological and biochemical features of the influence of chromium and heavy metals (HM) on microalgae. The chromium-accumulating ability of some microalgae and influence of HM on the physiological-biochemical parameters of microalgae in monoculture and mixed cultures are shown. The allelopatic relationships of microalgae and their influence on the processes of chromium and HM absorption are considered Microalgae A. flos-aquae, A. arnoldii, N. linckia, C. paryethina actively absorb chromium from the culture medium are shown. The greatest absorption of chromium and HM occurs in microalgae cultures with positive allelopathic interference: A. flos-aquae, A. arnoldii, A. flos-aquae, N. linckia. In this article discusses the results of experiments with test-objects of different trophic levels. The unicellular algae is the most sensitive group of organisms to potassium dichromate that is shown. Particularly emphasized is the chromium accumulating capacity of certain plant objects, including microalgae. In studies on the effects of harmful substances on aquatic organisms, potassium dichromate is used as a reference toxicant. Their brief characteristics, pathways and migration, including intracellular and extracellular detoxification of HM ions, are given. The results of investigations are that physiological and biochemical processes of microalgae in conditions of environmental contamination with chromium ions have a general biological significance and can be used for the study of phytoremediation, ecological physiology and biotechnology. The data obtained in the research can be used to develop methods for biological treaHMent of wastewater and closed water systems contaminated with chromium.
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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

Қазақ ұлттық қыздар педагогикалық университеті / Казахский национальный женский педагогический университет

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