Biocatalyst immobilization with a reversibly swelling and shrinking polymer
US4975375A · kind A · utility
14Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1989 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Sep 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S530/817
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
A biocatalyst such as an enzyme or microbe is immobilized in a polymer gel having a phase transition temperature such that it is capable of reversibly swelling and shrinking by a change in temperature. By lowering the temperature, the polymer gel is caused to swell and a biocatalyst is absorbed therein and by raising the temperature, the polymer gel is caused to shrink and immobilize the biocatalyst. The biocatalyst may then be released by cooling the polymer to cause it to swell. Only a portion of the polymer gel may be subjected to temperature change to immobilize the biocatalyst only in a desired portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.