Chemical and structural analysis of Nengchi Bajin ashes in refining of Tibetan medicine gTSo thal / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the chemical components and microstructure of Nengchi Bajin ashes which are adjuvant material in the refining of Tibetan medicine gTSo thal, in order to explore the material basis of the refining of gTSo thal.</p><p><b>METHOD</b>Scanning electron microscope-energy dispersive spectrometer (SEM-EDX) and X-ray diffraction (XRD) were used to measure the Nengchi Bajin ashes.</p><p><b>RESULT</b>SEM-EDX analysis show that except of themselves elements of Nengchi Bajin ashes, Nengchi Bajin ashes contain the major elements, such as S, O, C and so on, also contain small amount other elements. XRD analysis show that the structures are AuPb2, PbO (tetragonal and orthorhombic) and Pb in gold ash, Ag2S and PbO in silver ash, Cu1.98 (Zn0.73 Fe0.29)Sn0.99 S4, CuS, SiO2, NaCu2S2 and Ca (Fe(+2), Mg) (CO3)2 in bronze ash, Cu7S4 (orthorhombic and monoclinic) and CuO in red copper ash, Cu7 S4, PbS, ZnS, CaCO3and NaCu2S2 in brass ash, FeS, Fe+2 Fe(2+3)O4 and SiO2 in iron ash, SnS and SiO2 tin ash, PbS, PbSO4 and SnS2 in lead ash.</p><p><b>CONCLUSION</b>We have acquired the datum of elements and microstructure of Nengchi Bajin ashes by SEM-EDX and XRD techniques, and that is benefit to explore the material basis of refining gTSo thal.</p>

Conservation of endangered species resources of Tibetan medicine in China / 中国中药杂志

<p><b>OBJECTIVE</b>To further investigate and discuss the cause of species endangerment, the status and present problem of conservation of traditional Tibetan medicine in China.</p><p><b>METHOD</b>Previous relevant investigations and literatures were summed up in the field. The present situation of conservation of traditional Tibetan medicine was analyzed.</p><p><b>RESULT</b>The status of endangered resources, cause of species endangerment, the conserving status and conserving measures etc were elaborated. The classification was made and suggestion of species conservation of traditional Tibetan medicine were put forward.</p><p><b>CONCLUSION</b>The endangered species conservation of traditional Tibetan medicine was carried out by building protective area of endangered species resources and plant garden, setting up germplasm bank, developing the domestication and cultivation of Tibetan medicinal herbs most in use, strengthening the investigation and study of endangered species, launching exchange and cooperation of conservation techniques on endangered species, enhancing the protective awareness of endangered species traditional Tibetan medicine etc. By so doing we can facilitate the sustainable development of traditional Tibetan medicine in China.</p>