Determination of quercetin and kaempferol in Dysosma plants by RP-HPLC / 中国中药杂志

<p><b>OBJECTIVE</b>To determine quercetin and kaempferol in the plant of genus Dysosma that come from different species, different plant parts or different growing areas, which provide the basis of rational utilization of Dysosma plants.</p><p><b>METHOD</b>The analysis was performed on a Diamonsil C18 column (4.6 mm x 150 mm, 5 microm) eluted with the mobile phase of methanol-water containing 0.1% phosphoric acid (60:40). The flow rate was 1 mL x min(-1), the detection wavelength was 360 nm; and the column temperature was set at 25 degrees C.</p><p><b>RESULT</b>The linear ranges of quercetin and kaempferol are 0.22-1.1 microg and 0.42-2.1 microg. The average recoveries of quercetin and kaempferol are 97.1% (RSD 1.4%) and 99.6% (RSD 2.4%); respectively.</p><p><b>CONCLUSION</b>The contents of flavones in different species of Dysosma are significantly different.</p>

Studies on revision of species and distribution of medicinal plants in Guizhou province / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the origin of medicinal plants in Guizhou province, revise the incorrectly recorded species, and correct the erroneous and incomplete Latin names.</p><p><b>METHOD</b>Examination was implemented on species, Latin name and geographical distribution of medicinal plants recorded in 'Medicinal Material Resources of Guizhou'.</p><p><b>RESULT</b>It was found that 98 species and 4 varieties were absent in Guizhou province or their Latin names were incorrect in 17 families.</p><p><b>CONCLUSION</b>The origin of medicinal plants in Guizhou province was studied and the incorrect Latin names were revised. It provides a basis for standardization of medicinal plants in Guizhou province.</p>

An Investigation on the Ecotope and Resources of Gynostemma (Gynostemma BI. )in Guizhou Province / 中草药

Ecotope and distribution of Gynostemma BI. in Guizhou Province was surveyed. Four species of G. BI. including one new and one newly recorded speccies were found in this Province.