Search Results - "Kirova, Gergana"

Biosorption of Congo Red and Methylene Blue by pretreated waste Streptomyces fradiae biomass - Equilibrium, kinetic and thermodynamic studies by Velkova, Zdravka Yancheva, Kirova, Gergana Kirilova, Stoytcheva, Margarita S, Gochev, Velizar

“…Pretreated waste Streptomyces fradiae biomass was utilized as an eco-friendly sorbent for Congo Red (CR) and Methylene Blue (MB) removal from aqueous…”
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Tetracycline removal from model aqueous solutions by pretreated waste Streptomyces fradiae biomass by Kirova, Gergana, Velkova, Zdravka, Stoytcheva, Margarita, Gochev, Velizar

“…Pretreated waste Streptomyces fradiae biomass was used as biosorbent to remove tetracycline (TC) from model aqueous solutions. The biosorption study was…”
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Novel composite biosorbent from Bacillus cereus for heavy metals removal from aqueous solutions by Todorova, Kostadinka, Velkova, Zdravka, Stoytcheva, Margarita, Kirova, Gergana, Kostadinova, Sonia, Gochev, Velizar

“…Waste biomass from Bacillus cereus immobilized in sodium alginate and co-immobilized with activated carbon or with bentonite into alginate gel was studied for…”
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Ginkgo biloba Seeds—An Environmental Pollutant or a Functional Food by Tomova, Teodora, Slavova, Iva, Tomov, Desislav, Kirova, Gergana, Argirova, Mariana D.

“…Ginkgo biloba has been cultivated in Bulgaria since the end of the 19th century. Ividual specimens can be seen in almost every park. Females of the tree are…”
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Vanadium-Containing Anionic Chelate for Spectrophotometric Determination of Hydroxyzine Hydrochloride in Pharmaceuticals by Kirova, Gergana Kirilova, Velkova, Zdravka Yancheva, Delchev, Vassil Borisov, Gavazov, Kiril Blazhev

“…Four azo dyes known to form anionic complexes with V(V) were investigated as potential liquid-liquid extraction-spectrophotometric reagents for the…”
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Serum selenium concentration in patients with autoimmune thyroid disease by Davcheva, Delyana M., Kirova, Gergana K., Miteva, MariaMaria Zh, Tzvetkova, Todorka Z., Orbetzova, Maria M., Nonchev, Boyan I., Simitchiev, Kiril K., Kmetov, Veselin J.

“…Abstract Introduction : Selenium (Se) is one of the environmental factors with an essential role in the pathogenesis of autoimmune thyroid disease (ATD)…”
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Phytochemical and Biological Traits of Endemic Betonica bulgarica (Lamiaceae) by Mladenova, Tsvetelina, Stoyanov, Plamen, Todorov, Krasimir, Davcheva, Delyana, Kirova, Gergana, Deneva, Tanya, Gyuzeleva, Donika, Mladenov, Rumen, Bivolarska, Anelia

“…Betonica bulgarica is an endemic species distributed in Bulgaria. The chemical composition of the essential oil analysed by GC–MS (Gas chromatography–mass…”
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Biosorption of Pb(II) ions from aqueous solutions by waste biomass of Streptomyces fradiae pretreated with NaOH by Kirova, Gergana, Velkova, Zdravka, Stoytcheva, Margarita, Hristova, Yana, Iliev, Ivan, Gochev, Velizar

“…Biosorption of Pb(II) ions from a model solution was investigated using Streptomyces fradiae biomass as biosorbent pretreated with sodium hydroxide. The…”
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Immobilized microbial biosorbents for heavy metals removal by Velkova, Zdravka, Kirova, Gergana, Stoytcheva, Margarita, Kostadinova, Sonia, Todorova, Kostadinka, Gochev, Velizar

“…Intensive industrial and urban growth has led to the release of increasing amounts of environmental pollutants. Contamination by metals, in particular,…”
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Improving the Analytical Performances of the Ibuprofen Voltammetric Determination at Bare Graphite Electrode Using Semi-Derivative Linear Sweep Voltammetry by Stoytcheva, Margarita, Zlatev, Roumen, Velkova, Zdravka, Gochev, Velizar, Valdez, Benjamin, Kirova, Gergana, Hristova, Yana

“…In this work, a bare graphite electrode was applied for the simple and cost-effective ibuprofen determination. Analytical performances improvement was achieved…”
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The validity of using bare graphite electrode for the voltammetric determination of paracetamol and caffeine by Stoytcheva, Margarita, Zlatev, Roumen, Velkova, Zdravka, Gochev, Velizar, Meza, Claudia, Valdez, Benjamin, Kirova, Gergana, Hristova, Yana, Toscano-Palomar, Lydia

“…The validity of applying the readily available bare spectroscopic graphite electrode in the pharmaceutical analysis as a cost-effective, simple, and efficient…”
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