Micro liquid-liquid extraction(LLE) and solid phase extraction(SPE) were compared and gas chromatography-electron ionization mass spectrometry was used for the detection.

Refinewent of extract of Sophora japonica L.by inorganic ceramic membrane;

Antimicrobial activities of Capsicum frutescens L. extract;

Analysis of the quality of three dermatophagoides allergen extracts made in China;

The new equipment,new technology and new process for the black liquor extraction in wheat straw puling proces;

A newly developed novel efficient black liquor extraction equipment, gasbag press filter, used for wheat straw pulp washing is introduced in this paper.

Influence of fetal spinal cord extracts on the differentiation of neural stem cells;

The effect of flocculation on the clarifying treatment of Stevia rebaudiana Bertoni extracts and the selection of the most suitable flocculant were studied.

In this paper,experiments were conducted to study the effect of flocculation in the clarifying treatment of Stevia rebaudiana Bertoni extracts,choose the most suitable flocculant,and test about its clarification effects.