| 摘要 |
<p>Beads as food or tobacco additive containing at least one active ingredient which is slowly released are prepared by a process comprising the steps of forming a system consisting of a solution or dispersion or emulsion of a liquid active ingredient and/or of a solid active ingredient in an aqueous solution of an acid polysaccharide in the form of an alkali metal salt, an emulsifier and, optionally, one or more other water soluble or water dispersible substances; forming of discrete droplets of said system; converting said droplets to water-insoluble gel beads by introducing said droplets in an aqueous or alcoholic solution containing multivalent cations, thereby building a suspension; optionally, isolating said gel beads from said suspension and further, optionally, drying the isolated beads. The active ingredient is at least one compound of the group consisting of flavors, fragrances, vitamins and/or coloring materials.</p> |
