Yazar "Uzun, Yusuf" seçeneğine göre listele

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    Antimicrobial activity of three Macrolepiota species from Turkey
    (Asian Journal Of Chemistry, 2008) Dulger, Basaran; Hacioglu, Nurcihan; Aydin, Gurhan; Uzun, Yusuf
    Three Macrolepiota species (M. heimii, M. rachodes and M. puellaris) were tested for their antimicrobial activity by using the disc diffusion method. The ethanol extract from the fruit bodies of mushrooms were assayed against 16 microorganisms. In comparison with the test antibiotics amikacin, chloramphenicol and nystatin, the ethanol extract obtained from M. heimii presented significant activity against Micrococcus species and Citrobacter freundii. The extracts have weak anti-yeast activity against the yeast cultures.
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    Introduction of double amidoxime group by double post surface modification on poly(vinylbenzyl chloride) beads for higher amounts of organic dyes, As (V) and Cr (VI) removal
    (Academic Press Inc Elsevier Science, 2016) Ajmal, Muhammad; Demirci, Şahin; Uzun, Yusuf; Siddiq, Mohammad; Aktas, Nahit; Şahiner, Nurettin
    In this study, the synthesis of micron-sized poly(vinylbenzyl chloride) (p(VBC)) beads and subsequent conversion of the reactive chloromethyl groups to double amidoxime group containing moieties by post modification is reported. The prepared beads were characterized by SEM and FT-IR spectroscopy. The amidoximated p(VBC) beads were used as adsorbent for the removal of organic dyes, such as eosin y (EY) and methyl orange (MO), and heavy metals containing complex ions such as dichromate (Cr2O72- and arsenate (HAsO42-) from aqueous media. The effect of the adsorbent dose on the percent removal, the effect of initial concentration of adsorbates on the adsorption rate and their amounts were also investigated. The Langmuir, Freundlich and Temkin adsorption isotherms were applied to the adsorption processes. The results indicated that the adsorption of both dichromate and arsenate ions obeyed the Langmuir adsorption model. Interestingly, it was found that the prepared beads were capable of removing significant amounts of arsenate and dichromate ions from tap and river (Sancay, Canakkale-Turkey) water. (C) 2016 Elsevier Inc. All rights reserved.
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    Optimization with response surface methodology of toluidine blue biosorption conditions from aqueous solutions by Polyporus squamosus (Huds.) Fr. and Lentinus tigrinus (Bull.) Fr. fungi as biosorbent
    (Amer Chemical Soc, 2016) Alpaslan, Duygu; Ersen, Tuba; Kubilay, Senol; Uzun, Yusuf; Kul, Ali Riza; Aktas, Nahit
    [Anstract Not Available]