As a whole, the supports to be used in immobilization belong to two
major groups: natural organic and inorganic. Among these groups,
several materials have been proposed for use in wine-making,
including sodium alginate, Ca-alginate, kissiris, c-aloumina pellets,
gluten pellets, DEAE-cellulose, delignified cellulosic materials, fruit
pieces, and dried raisin berries