کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1184989 963379 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Performance of β-galactosidase pretreated with lactose to prevent activity loss during the enzyme immobilisation process
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Performance of β-galactosidase pretreated with lactose to prevent activity loss during the enzyme immobilisation process
چکیده انگلیسی

In this study, Kluyveromyces lactis β-galactosidase was pretreated with lactose to prevent loss of activity during the immobilisation process, and glutaraldehyde was used as a linker to immobilise β-galactosidase on the surface of a silica gel. The pretreatment of β-galactosidase strongly improved its activity after immobilisation. Specifically, the activity of pretreated immobilised β-galactosidase was 2.6 times greater than that of non-pretreated immobilised β-galactosidase. The optimal temperature, pH and ionic strength of buffer for pretreated immobilised β-galactosidase were 37 °C, pH 7.5 and 20 mM potassium phosphate buffer, respectively. These values were shifted by 5 °C and pH by 0.5 when compared to the soluble β-galactosidase. Moreover, the pretreated immobilised β-galactosidase showed a better reusability than did non-pretreated immobilised β-galactosidase, with 63.9% of its original activity being retained after 10 reuses.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 123, Issue 1, 1 November 2010, Pages 1–5
نویسندگان
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