| abstract |
A biodegradable carrier is produced for preservation and/or controlled delivery of biologically active agents where said biodegradable carrier is a silica xerogel which is made from water and silane by using acid or base as a catalyst, and biologically active agents in said biodegradable carrier are infecting and/or transfecting viruses. Silica xerogel material can be pharmaceutically acceptable and it can be used as a medicine. |