کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9616728 | 48866 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Supramolecular assembly of β-cyclodextrin-modified gold nanoparticles and Cu, Zn-superoxide dismutase on catalase
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Supramolecular assembly of β-cyclodextrin-modified gold nanoparticles and Cu, Zn-superoxide dismutase on catalase Supramolecular assembly of β-cyclodextrin-modified gold nanoparticles and Cu, Zn-superoxide dismutase on catalase](/preview/png/9616728.png)
چکیده انگلیسی
A bienzymatic supramolecular nanoassembly containing catalase and Cu, Zn-superoxide dismutase is reported. Catalase was hydrophobically modified with 1-adamantanecarboxylic acid and then immobilized on β-cyclodextrin-coated gold nanospheres via supramolecular associations. The bienzymatic nanocatalyst was further prepared by co-immobilization of β-cyclodextrin-modified superoxide dismutase. Supramolecularly immobilized catalase and superoxide dismutase retained 73 and 35%, respectively, of their initial specific activity. The range of optimum pH for catalase was increased from 7.0-7.5 to 6.5-7.5, and the thermal stability improved by 7 °C after co-immobilization. Superoxide dismutase was 90-fold more resistant to inactivation by 100 mM H2O2 after bienzymatic immobilization with catalase on metal nanoparticles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis B: Enzymatic - Volume 35, Issues 4â6, 1 September 2005, Pages 79-85
Journal: Journal of Molecular Catalysis B: Enzymatic - Volume 35, Issues 4â6, 1 September 2005, Pages 79-85
نویسندگان
Reynaldo Villalonga, Roberto Cao, Alex Fragoso, Angelo E. Damiao, Pedro D. Ortiz, Julio Caballero,