Oat bran was porphyrizd into cell-level ultramicro-power.

Result:The ultramicro-powder shows a higher content of Baicalin than the conventional fine powder of HLJDT, improved 32.53% by ultrasonic extract and 51.15% by simply extract(stirred by spoil water).

The paper reveals the important effect of fabricating the fine ceramic by using monodispersed ultramicro particles as starting materials.