The white surface is a kind of single coated paper mixed with chemical materials as kaolin and adhesives.
表面为白色，是一层由高岭土粉、粘合剂等化工原料混合而成的薄涂料面。
OBJECTIVE To prepare colon-specific multiple and single coated drop pills and compare their colon-specific delivery.
结论多层包衣滴丸和单层包衣滴丸均具有结肠定位释药性能，但前者定位性能明显优于后者。
The single coated drop pills were partly released in intestines, but the multiple coated drop pills were released until it reached the colon.
目的比较多层包衣滴丸和单层包衣滴丸的结肠定位释放性能。
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