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- W1983037879 abstract "Preparation of chemically functionalized biocompatible surfaces is of current interest, with application in the immobilization of various bioactive species such as DNA, enzymes, whole cells, etc. We report herein the one-step synthesis of a self-supporting gold nanoparticle membrane, its surface modification, and application in the immobilization of Candida bombicola (yeast) cells. The gold nanoparticle membrane is prepared by the spontaneous reduction of aqueous chloroaurate ions by a diamine at a liquid-liquid interface. The gold nanoparticles in the polymeric membrane may be capped with octadecylamine (ODA) molecules, thereby rendering the nanoparticle membrane hydrophobic. Exposure of the hydrophobized organic-gold nanoparticle membrane to C. bombicola yeast cells results in their binding to the membrane, possibly through nonspecific interactions such as hydrophobic interactions between the yeast cell walls and the ODA molecules. The enzyme cytochrome P450 present in the yeast cells immobilized on the organic-gold nanoparticle membrane was then used in the transformation of the arachidonic acid (AA) to sophorolipids followed by acid hydrolysis to form 20-hydroxyeicosatetraneoic acid (20-HETE). The organic-gold nanoparticle membrane– C. bombicola bioconjugate could be easily separated from the reaction medium and reused a number of times." @default.
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- W1983037879 date "2004-12-03" @default.
- W1983037879 modified "2023-09-25" @default.
- W1983037879 title "Immobilization of Candida bombicola Cells on Free-Standing Organic-Gold Nanoparticle Membranes and Their Use as Enzyme Sources in Biotransformations" @default.
- W1983037879 doi "https://doi.org/10.1021/bp049792h" @default.
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