Search Results - "Velkova, Zdravka Yancheva"

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  1. 1
    Vanadium-Containing Anionic Chelate for Spectrophotometric Determination of Hydroxyzine Hydrochloride in Pharmaceuticals

    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

    Published in Molecules (Basel, Switzerland) (01-03-2023)
    “…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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    Biosorption of Congo Red and Methylene Blue by pretreated waste Streptomyces fradiae biomass - Equilibrium, kinetic and thermodynamic studies

    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

    Published in Journal of the Serbian Chemical Society (01-01-2018)
    “…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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