title: Solvothermal synthesis of functional magnetic nanoparticles for biocatalyst.
abstract: A facile and simple one-step solvothermal method has been developed to synthesize polyethyleneimine (PEI)-modified magnetic nanoparticles. Characterization of morphology, surface charges, crystal structure, and magnetic property confirmed the efficiency of this facile synthesis route. Lipase immobilized on the PEI-modified magnetic nanoparticles was used to synthesize vitamin A palmitate from vitamin A acetate and palmitic acid. The reuse of immobilized lipase can be extended to eight times by removing water during esterification with a conversion rate above 80 % for 12 h.
authors.affiliation: Beijing Key Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China.
authors.forename: Huaqing
authors.initials: H
authors.lastname: Shen
authors.forename: Jianxuan
authors.initials: J
authors.lastname: Hou
authors.forename: Zexin
authors.initials: Z
authors.lastname: Gao
authors.forename: Biqiang
authors.initials: B
authors.lastname: Chen
authors.forename: Tianwei
authors.initials: T
authors.lastname: Tan
mesh_terms: D055162:Biocatalysis; D004795:Enzyme Stability; D004800:Enzymes, Immobilized / Q000737:chemistry; D004951:Esterification; D005656:Fungal Proteins / Q000737:chemistry*; D008049:Lipase / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D011094:Polyethyleneimine / Q000737:chemistry; D014801:Vitamin A / Q000737:chemistry; D025062:Yarrowia / Q000201:enzymology*
chemical_list: D004800:Enzymes, Immobilized; D005656:Fungal Proteins; D058185:Magnetite Nanoparticles; D014801:Vitamin A; D011094:Polyethyleneimine; D008049:Lipase