Abstract: Methods and reagents are disclosed for reducing an amount of non-covalently bound polysaccharide on a support. The method comprises contacting a support comprising both covalently bound polysaccharide and non-covalently bound polysaccharide with an aqueous solution comprising an amount of a chaotropic agent effective to remove non-covalently bound polysaccharide from the support.

Abstract: Methods and reagents are disclosed for reducing an amount of non-covalently bound polysaccharide on a support. The method comprises contacting a support comprising both covalently bound polysaccharide and non-covalently bound polysaccharide with an aqueous solution comprising an amount of a chaotropic agent effective to remove non-covalently bound polysaccharide from the support.

Abstract: There is provided a continuous, steady state process for the preparation of nonrandom ethylene/.alpha.,.beta.-ethylenically unsaturated carboxylic acid copolymers in at least 2 constant environment, stirred autoclaves in series wherein the first autoclave is maintained at the pressure in the range of 800 to 3000 atmospheres (11.8 to 44.1 kpsi) and at a temperature in the range of 120.degree. to 200.degree. C. in a single phase reaction mixture at the given concentration of copolymer in the reaction mixture and at the given acid comonomer content of the copolymer and wherein each succeeding autoclave is maintained at a temperature of at least 30.degree. C. in excess of the preceding autoclave. The compolymers thus obtained have a ratio of percent adjacent acid to weight percent acid in the copolymer of from above 0.44 to about 1.0.