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。
CONCLUSION Both multiple and single coated drop pills had the colon-specific delivery characteristics, but multiple coated drop pills was much better.
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。
RESULTS the preparation was simple. The single coated drop pills were partly released in intestines, but the multiple coated drop pills were released until it reached the colon.
结果单层包衣滴丸制备工艺简单，但在小肠部位有部分泄漏，而多层包衣滴丸顺利到达结肠后才开始释药。
RESULTS the preparation was simple. The single coated drop pills were partly released in intestines, but the multiple coated drop pills were released until it reached the colon.
结果单层包衣滴丸制备工艺简单，但在小肠部位有部分泄漏，而多层包衣滴丸顺利到达结肠后才开始释药。
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