In biotechnology enzymes and cells have been immobilized for several years.
A special kind of immobilization is the entrapment of biocatalysts. Hollow
beads on the basis of sulfoethyl cellulose (SEC) are expected to be advant
ageous for a variety of applications. This study provides a thorough descri
ption of the preparation of hollow beads with good mechanical stability on
the basis of polyelectrolyte polyelectrolyte complexes of SEC as polyanion
for the encapsulation of biocatalysts and other materials under moderate co