OBJECTIVE:To analysis the volatile components in wild strains of Rabdosia rubescensin in Jiyuan area. METH-ODS:Headspace solid phase microextraction (HS-SPME) was conducted to extract the volatile components in 43 wild species of R. rubescens,GC-MS was conducted to identify the components,and peak area normalization method was conducted to calculate the relative content of the components. RESULTS:The variety and relative contents of the volatility components in 43 wild species had obvious differences and the ranges of species number and relative content was from 0 to 11 and from 0 to 84.03% respectively. Caryophyllene,caryophyllene oxide,dihydroactinidiolide,phytone and patchouli alcohol were main components which existed in a variety of different strains of volatile components of R. rubescens,and were mainly composed of terpenes,ketones,alcohols and es-ters. In addition,fatty acids such as palmitic acid,oleic acid and linoleic acid were contained in a few individual varieties. CON-CLUSIONS:The internal quality in 43 wild species of R. rubescens has certain differences.

This study was aimed to assay the antibacterial activity of compounds from Rabdosia rubescens. Disc dif-fusion (K-B method) was used to screen the in vitro antibacterial activity. All kinds of chromatography were used to isolate the chemical constituent and structure was identified by MS and NMR spectroscopy. The results showed that six compounds were isolated and identified as oridonin (1), rosmarinic acid (2), caffeic acid (3), salicylic acid (4), ferulic acid (5), vanillic acid (6). Oridonin had activity against Staphylococcus aureus (SA), Methcillin-resistant Staphylococcus aureus (MRSA), β-lactamase positive Staphylococcus aureus (ESBLs-SA), and showed the highest ac-tivity (MIC is 3.125, 6.25 and 6.25 μg·disc-1, respectively), but was still weaker than that of berberine as positive control (MIC is 0.156 μg·disc-1). Ferulic acid had activity against SA and MRSA (MIC is 50 and 50 μg·disc-1, re-spectively). Salicylic acid had only activity against SA (MIC 50 μg·disc-1). It was concluded that oridonin, ferulic acid and salicylic acid were the main antibacterial activity compounds from R. rubescens.

Objective:To study the effect of Xiaoyao Powder on Alzheimer's disease in hippocampal CA 3βregion of rats PP-2A,GSK-3βexpression.Methods:Rats were randomly divided into four groups , including model group, western medicine group,Chi-nese medicine group were treated with intraperitoneal injection of D-gal and A-β1-42 peptide bilateral hippocampal injection mold-ing, physiological group only with equal volume of sterile saline intraperitoneal and hippocampal injection molding .The model was completed, normal group, model group were perfused with saline , western medicine group and Chinese medicine group were treated with oxiracetam solution and Xiaoyao decoction , four groups of intragastric volume was 0.5 ml/100 g, 1 time a day, continuous 28 d. After intragastric administration of isolated rat brain immediately , packet marking in 4℃4%glutaraldehyde solution of glass container , stored at 4℃.Repair piece, cut from the hippocampus, embedded in paraffin, sliced.Dilution of PP-2A for 1∶200, GSK-3βdilution of 1∶150.Images were analyzed by using Image-pro Plus 5 image analysis system, data were conducted by SPSS11.5 statistical analysis software, the comparison between 4 groups by single factor analysis of variance , between the two two groups was compared by LSD-t test, the test level of α=0.05.Results:The expression of PP-2A positive cell number and the positive area , average optical density, integral optical density index , in Xiaoyao Powder orally intervention compared with the model group increased significantly (P<0.01);GSK-3βabove indices were significantly decreased than that in model group after Xiaoyao Powder after intragastric ad -ministration (P<0.01).Conclusion:Xiaoyao Powder can up regulate the expression of PP-2A and down regulate expression of GSK-3β, may be condensed A-β1-42 peptide induced hyperphosphorylation of Tau has certain inhibition .