| 摘要 |
PROBLEM TO BE SOLVED: To provide a cationic betaine precursor to zwitterionic betaine having controlled biological properties.SOLUTION: Provided are cationic polymers hydrolyzable to zwitterionic polymers, monomers for making the cationic polymers, surfaces that include the polymers, therapeutic agent delivery systems that include the cationic polymers, methods for administering a therapeutic agent using the delivery systems, and methods for making and using the cationic polymers, monomers, surfaces, and therapeutic agent delivery systems. |
