The use of chemical compound Fe3Se3O9∙6H2O for obtaining selenium and iron enriched spirulina biomass
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DJUR (MAXACOVA), Svetlana. The use of chemical compound Fe3Se3O9∙6H2O for obtaining selenium and iron enriched spirulina biomass. In: Microbial Biotechnology, Ed. 4, 11-12 octombrie 2018, Chișinău. Chișinău, Republica Moldova: Institutul de Microbiologie şi Biotehnologie, 2018, Ediția 4, p. 85. ISBN 978-9975-3178-8-7.
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Microbial Biotechnology
Ediția 4, 2018
Conferința "Microbial Biotechnology"
4, Chișinău, Moldova, 11-12 octombrie 2018

The use of chemical compound Fe3Se3O9∙6H2O for obtaining selenium and iron enriched spirulina biomass


Pag. 85-85

Djur (Maxacova) Svetlana
 
Institutul de Microbiologie şi Biotehnologie
 
Disponibil în IBN: 19 februarie 2019



Teza

Intensive researches are currently directed toward the study of microalgae and cianobacteria as a potential source of bioactive substances (proteins, vitamins, essential amino acids, β-carotene, etc.) and for their use as valuable food additives and medicines. One of the most promising among them is the cyanobacterium Spirulina platensis. The quality of its biomass can be improved by directed synthesis, changing the composition of the culture medium and using of new chemical compounds. The use of selenium for his purpose is of particular interest. Few scientific papers report data on the effect of only three compounds containing selenium (Na2SeO3, Na2SeO4 and Н2ЅеО3) on the cyanobacterium Spirulina platensis. Their effects refer to the improvement of spirulina biochemical composition: increase of the protein content, especially the amount of phycobiliproteins; of the content of polysaccharides, depending on the fraction; and also selenium enrichment of biomass. Selenium is an essential trace element for the normal development of living organisms. It activates the processes of tissue respiration, regulates oxidation-reduction reactions, and affects immunological activity, protein metabolism, especially the metabolism of sulfur-containing amino acids. Its therapeutic (antiviral, antimicrobial, anti-inflammatory etc.) characteristics are also widely known. The use selenite of iron Fe3Se3O9∙6H2O during spirulina cultivation allows the accumulation, along with selenium, of another important element - the iron. The most important function of iron in the body is the production of red blood cells. A large number of enzymes require iron as cofactor for their functions. This element is involved in maintaining the normal state of the immune system, supporting the formation and maturation of T-lymphocytes. Deficiency of iron has a negative effect on mental development. In our studies, spirulina cultivation was carried out for 144 hours, in Erlenmeyer flasks with 100 ml Zarruk nutrient medium, with a specific ratio of macro- and microelements for normal development and growth. The necessary conditions for the normal biosynthesis of all intracellular components of S. platensis were observed: temperature of 280 ± 10C, illumination of 30003 lux, pH = 9,5-10,0. The chemical compound Fe3Se3O9∙6H2O was introduced on the first day of cultivation in concentrations of 10, 20 and 30 mg/l. According to the obtained data, selenite of iron in all of investigated concentrations has a positive effect on the productivity of cyanobacterium S. platensis and enriches its biomass with selenium and iron. The best option was noted when this compound was added at a concentration of 30 mg/l. The productivity was 10% higher than the control sample, and the accumulation of selenium and iron was 280 mg% and 318 mg%, respectively. Thus, the Fe3Se3O9∙6H2O compound can be used to produce biomass of cyanobacterium enriched with selenium and iron, that can served as a source for production of preparations with antitumor, antiviral, antibacterial and antianemic properties.