کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7591611 | 1492104 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An innovative method for immobilizing sucrose isomerase on ε-poly-l-lysine modified mesoporous TiO2
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: An innovative method for immobilizing sucrose isomerase on ε-poly-l-lysine modified mesoporous TiO2 An innovative method for immobilizing sucrose isomerase on ε-poly-l-lysine modified mesoporous TiO2](/preview/png/7591611.png)
چکیده انگلیسی
Sucrose isomerase (SIase) is the key enzyme in the enzymatic synthesis of isomaltulose. Mesoporous titanium dioxide (M-TiO2) and ε-poly-l-lysine-functionalized M-TiO2 (EPL-M-TiO2) were prepared as carriers for immobilizing SIase. SIase was effectively immobilized on EPL-M-TiO2 (SI-EPL-M-TiO2) with an enzyme activity of 39.41 U/g, and the enzymatic activity recovery rate up to 93.26%. The optimal pH and temperature of immobilized SIase were 6.0 and 30 °C, respectively. SI-EPL-M-TiO2 was more stable in pH and thermal tests than SIase immobilized on M-TiO2 and free SIase. Km of SI-EPL-M-TiO2 was 204.92 mmol/L, and vmax was 45.7 μmol/L/s. Batch catalysis reaction of sucrose by SI-EPL-M-TiO2 was performed under the optimal conditions. The half-life period of SI-EPL-M-TiO2 under continuous reaction was 114 h, and the conversion rate of sucrose after 16 batches consistently remained at around 95%, which indicates that SI-EPL-M-TiO2 has good operational stability. Thus, SI-EPL-M-TiO2 can be used as a biocatalyst in food industries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 187, 15 November 2015, Pages 182-188
Journal: Food Chemistry - Volume 187, 15 November 2015, Pages 182-188
نویسندگان
Lingtian Wu, Yi Liu, Bo Chi, Zheng Xu, Xiaohai Feng, Sha Li, Hong Xu,