The present invention relates biomedically useful compositions containing bioactive agents and biodegradable carbohydrate polyethers that exhibit reverse thermogelation properties in aqueous media. The microstructure structure and properties of the carbohydrate polyethers can be conveniently controlled with respect to functionality, molecular weight, polydispersity index, microstructure and tertiary structure, they can be customized for use in a variety of biomedical applications including drug delivery, cell delivery, surgical procedures and the like.
