کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9607680 | 45147 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Immobilization of Aspergillus niger glucoamylase onto a polyaniline polymer
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Immobilization of Aspergillus niger glucoamylase onto a polyaniline polymer Immobilization of Aspergillus niger glucoamylase onto a polyaniline polymer](/preview/png/9607680.png)
چکیده انگلیسی
Glucoamylase was immobilized onto chemically synthesized polyaniline after activation with glutaraldehyde (PANIG). The immobilized glucoamylase (PANIG-GA) presented better performance than free enzyme when submitted to heat treatment, showing a 10 °C decrease on the optimal assay temperature. The pH profile of the immobilized and free enzyme revealed similar behaviour, although PANIG-GA exhibited higher stability in the alkaline range (from pH 8.0 to 10). The KM value of free enzyme for starch (4.76 mg mLâ1) was higher than that of the immobilized glucoamylase (0.43 mg mLâ1) whereas Vmax was lower for the immobilized glucoamylase (0.95 μmol minâ1) preparation than free enzyme (8.58 μmol minâ1). Thin layer chromatography (TLC) showed that no changes was observed between free and immobilized enzyme starch hydrolysis products.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Biochemistry - Volume 40, Issues 3â4, March 2005, Pages 1155-1159
Journal: Process Biochemistry - Volume 40, Issues 3â4, March 2005, Pages 1155-1159
نویسندگان
R.N. Silva, E.R. Asquieri, K.F. Fernandes,