Abstract: The present invention provides a method for preparing an orally administrable formulation comprising a biologically active ingredient for controlled release in a neutral or basic environment, which comprises the steps of: (a) dispersing powder ethylcellulose with an average diameter from about 0.1 ?m to about 300 ?m in an aqueous solution to provide an aqueous dispersion, wherein the aqueous dispersion is substantially free of detergent; (b) mixing the biologically active ingredient and the aqueous dispersion obtained in step (a) to provide a mixture; and (c) spray-drying the mixture obtained in step (b) for about 10 seconds to about 2 minutes in a drying chamber at a chamber temperature of about 45° C. to about 100° C. to obtain the orally administrable formulation. An orally administrative formulation prepared by the method of the invention is also provided.

Abstract: The present invention provides a method for preparing an orally administrable formulation comprising a biologically active ingredient for the controlled release in a neutral or basic environment, which method comprises the steps of: (a) dispersing powder ethylcellulose with an average diameter of from about 0.1 &mgr;m to about 300 &mgr;m in an aqueous dispersion to provide an enteric encapsulant; (b) mixing the biologically active ingredient and the enteric encapsulant obtained in step (a) to obtain a mixture; and (c) spray-drying the mixture obtained in step (b) for about 10 sec. to 15 sec. in a drying chamber at a chamber temperature of about 45° C. to about 80° C. to obtain an orally administrable formulation. The orally administrative formulation prepared by the method of the invention is also provided.

Abstract: An absorption refrigeration system uses a solution and a refrigerant contained in the solution as working mediums.