Abstract
Laccase was immobilised on polyethyleneglycol diacrylate (PEGDA) microspheres. The optimal preparation conditions of PEGDA microspheres were as follows: 3.0% (w/v) 2,2-azobisisobutyro-nitrite (AIBN), 4.0-5.0% (w/v) polyvinylpyrrolidone (PVP), 5.0-8.0% (w/v) glucose and 4.0% (w/v) PEGDA in glucose solution. The volume ratio of PEGDA solution, glucose/PVP solution and AIBN solution was 25: 100: 1. Microspheres obtained exhibited good characteristics with small sizes (1-4m). The immobilised laccase showed a higher stability in a wide pH range. Thermal stability and storage stability of immobilised laccase were enhanced. The activity of immobilised laccase was 45.0% after six cycles uses. Only 62.7% of the activity remained for free laccase while there was a 60.4% increased for immobilised laccase with storage at 4°C for 25d. The Km value of laccase increased from 21.9 to 114.0mol/l after immobilisation.
Original language | English |
---|---|
Pages (from-to) | 22-28 |
Number of pages | 7 |
Journal | Journal of Microencapsulation |
Volume | 32 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2015 Feb 1 |
Bibliographical note
Funding Information:The authors were supported by the Fundamental Research Funds for the Central Universities (2572014CA23) and China Postdoctoral Science Foundation (2013M541328). The authors report no declarations of interest.
Keywords
- Enzyme activity
- Immobilisation
- Laccase
- Polyethyleneglycol diacrylate microspheres
ASJC Scopus subject areas
- Bioengineering
- Pharmaceutical Science
- Physical and Theoretical Chemistry
- Organic Chemistry
- Colloid and Surface Chemistry