Study on the activity and stability of urease immobilized onto nanoporous alumina membranes
β Scribed by Zhengpeng Yang; Shihui Si; Chunjing Zhang
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 675 KB
- Volume
- 111
- Category
- Article
- ISSN
- 1387-1811
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## Abstract The activity of urease varies by its redox reaction. Active urease has an SH group that is essential to exhibit its activity, however, oxidation agents such as quinone compounds can oxidize the SH group in urease and a SβS bond is produced, resulting in the loss of enzyme activity. The
## Abstract Summary: Poly(acrylonitrileβmethylmethacrylateβsodium vinylsulfonate) membranes were subjected to seven different chemical modifications and the amount of the newly formed groups was measured for each membrane. Urease was then covalently immobilized onto the modified membranes and the a