Yazar "Kilic, I" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Lipase-catalyzed esterification of glycerol and oleic acid
    (Amer Oil Chemists Soc A O C S Press, 2004) Yesiloglu, Y; Kilic, I
    The enzymatic synthesis of glycerides from glycerol and oleic acid in organic solvent was studied, and the optimal conditions for glyceride synthesis by lipases were established. Of the commercially available lipases that were investigated, Candida rugosa lipase and porcine pancreas lipase resulted in the highest extent of esterification. Iso-octane and hexane were particularly useful organic solvents in glyceride synthesis. The water content in the reaction mixture was of primary importance. For C. rugosa lipase and porcine pancreas lipase, the optimal water contents were 5 and 1%, respectively. Candida rugosa lipase and porcine pancreas lipase manifested contrasting positional specificities in glyceride synthesis.
  • Küçük Resim Yok
    Öğe
    Polyvinyl alcohol-trypsin as a catalyst for amino acid ester synthesis in organic media
    (Marcel Dekker Inc, 2004) Yesiloglu, Y; Kilic, I
    The bovine trypsin-catalyzed synthesis of N-alpha-benzoyi-DL-arginine esters from N-benzoyl-DL-arginine were studied in various organic solvents. Trypsin was immobilized to polyvinyl alcohol (PVA) by adsorption from its aqueous solutions. Immobilized enzyme showed higher catalytic activities than free enzyme for amino acid esterification in ethanol. The yield of ester is strongly dependent upon the PVA/trypsin ratio and water content in the reaction medium. The rate and equilibrium constant of the ester formation reaction are also dependent on water content.