Abstract: The present invention relates to polymer beads having a water-insoluble inorganic compound encapsulated therein, and their preparation method and use. In the present invention, the water-insoluble inorganic compound which has limitations on its use because of the characteristic of precipitates in an aqueous solution is encapsulated in the polymer beads. This encapsulation provides an increase in the utility of the water-insoluble inorganic compound and at the same time, imparts the activity of the water-insoluble inorganic compound to the polymer, thus increasing the function of the polymer. Accordingly, the polymer beads having the water-insoluble inorganic compound encapsulated therein, which are prepared by the inventive method, can be advantageously used in various fields, including medical and electronic industries.

Abstract: The present invention relates to macroporous chitosan beads having 5-200 ?m in size of relatively large and uniform pores that are distributed from surface to core region. The macroporous chitosan beads of the present invention make cell culturing efficient. Cells can attach to them efficiently due to their large surface area.

Abstract: The present invention relates to macroporous chitosan beads having 5-200 &mgr;m in size of relatively large and uniform pores that are distributed from surface to core region, and a preparation method thereof compring the following steps; by dropping chitosan solution, aqueous chitosan solution or their mixture into the low-temperature of organic solvent or liquid nitrogen; and by regulating pore size by phase separation method via temperature difference.