Studies on factors influencing on ephedrine contents in Maxing Shigan decoction / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the factors influencing on the ephedrine contents in different compositions of Maxingshigan decoction.</p><p><b>METHOD</b>Adopt mixed uniform design to dismantle recipes, employ the stepping regression analysis to deal with experimental statistics, use the partial correlational analysis to analyze the correlation coefficients and the results were validated.</p><p><b>RESULT</b>The regressive equation was of significance, that is Y = 4.36719347 + 7.752707437X1 + 1.2557197041X3 (r = 0.85564, P = 0.0189). The main influencing factors on ephedrine content in Maxingshigan decoction were gypsum and amygdalin. The influent factor of amygdalin on ephedrine content had great significance, and gypsum had significance.</p><p><b>CONCLUSION</b>The collective effects of amygdalin and gypsum affect the content of ephedrine in Maxing Shigan decoction which the content-effect relationship was in direct correlation.</p>

Determination of glycyrrhizic acid in different decoctions of sanaotang by HPLC and comparison with antifugal effects in vitro / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the contents of glycyrrhizic acid in hejian decoction (mixed the traditional Chinese herbs together, then boiling them with water) and the fenjian decoction (boiling the single traditional Chinese herb with water separately, then mixed the abstracts) of Sanaotang (composed of Ephedra sinica, Prunus armeniaca and Glycyrrhiza uralensis) and to compare with their anti-bacterial activities in vitro.</p><p><b>METHOD</b>A HPLC method was established with a Agilent Zorbax SB-C18 column (4. 6 mm x 250 mm, 5 microm), a mobile phase of acetonitrile-0.2% acetic acid solution (35:65), a flow rate of 1 mL x min(-1) and a detection wavelength of 254 nmn in order to determine the contents of glycyrrhizic acid minimal bacterial inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) antagonized the common bacteria in different decoctions were rieasured in vitro by employing dilution method.</p><p><b>RESULT</b>The average content of glycyrrhizic acid of the hejian decoction was higher than that of the fenjian decoction. The hejian decoction could display the inhibitory bactericidal activity to Aeruginosus bacillus, but the fenjian decoction could not. And to Staphylococcus aureus, the inhibitory bactericidal activity the hejian decoction was slightly stronger than that of the fenjian decoction.</p><p><b>CONCLUSION</b>Comparing with that of the fenjian decoction, the content of glycyrrhizic acid of the hejian decoction was higher and the anti-bacterial activities was stronger.</p>

Measurement of baicalin contents by HPLC / 中国中药杂志

<p><b>OBJECTIVE</b>To compare the contents of baicalin in the raw medical material and the different prepared medical materials of Scutellaria baicalensis.</p><p><b>METHOD</b>The contents of baicalin were determined by HPLC. Chromatographic conditions included Hypersil C18 column and the mobile phase consisting of a mixture of methanol-0.04% phosphoric acid (46:54). Baicalin was detected at 280 nm. The standard curve was linear in the range of 0.0280-4.6700 micrograms with correlation coefficient 1.0000. The average recovery of baicalin was 101.22% with RSD = 2.54% (n = 5).</p><p><b>RESULT</b>The contents of baicalin were 6.80% in raw material, 6.00% and 6.73% in the different prepared medical materials of S. baicalensis respectively.</p><p><b>CONCLUSION</b>The two different kinds of preparing methods can be used to the raw material of S. baicalensis.</p>