To study the chemical constituents of Stephania yunnanensis H. S. Lo and their in vitro antibiotic activities. Silica gel, alumina and Sephadex LH-20 chromatographic methods are used to isolate alkaloidal constituents. Structures of the compounds are identified based on physicochemical properties and spectral analysis. Kirby-Bauer test and porous plate method are used to study the inhibitory ac...

Taxonomy of the genus Denierella Kaszab, 1952 (Coleoptera: Meloidae: Epicautini) is evaluated. The following new synonyms and combinations (all from the genus Epicauta Dejean, 1834) are established: Denierella thailandica (Dvořák, 1996) comb. nov. = D. striolata Yang & Ren, 2007 syn. nov.; Denierella emmerichi (Pic, 1934) comb. nov. = D. serrata Kaszab, 1952 syn. nov.; Denierella promerotricha ...

The genus Luculia Sweet contains about five species of small trees or shrubs and is a member of the family Rubiaceae (tribe Cinchoneae). Luculia yunnanensis is an endangered ornamental shrub endemic to southwest China. Only two natural populations of L. yunnanensis exist in the wild according to our field investigation. It can be inferred that L. yunnanensis is facing a very high risk of extinc...

The ascomata and mycorrhizae of Tuber indicum s.l. were collected under the forest of broad-leaf species Populus yunnanensis and Quercus pannosa in the field respectively. The symbiotic relationships of both trees with T. indicum were examined and affirmed based on morphology and ITS-rDNA sequences. These two mycorrhizal combinations were successfully produced on artificially controlled substra...

UNLABELLED The fungus Stachybotrys chartarum is the type species of the genus Stachybotrys. It is a cellulolytic saprophyte with a worldwide distribution and is frequently recovered in water-damaged buildings. Three isolates of S. chartarum were studied morphologically from single-spore isolations. Significant differences were found with the sizes, lengths, width, and L/W ratio of conidia and p...

Polyphyllin G (also call polyphyllin VII), extract from rhizomes of Paris yunnanensis Franch, has been demonstrated to have strong anticancer activities in a wide variety of human cancer cell lines. Previous studies found that Polyphyllin G induced apoptotic cell death in human hepatoblastoma cancer and lung cancer cells. However, the underlying mechanisms of autophagy in human nasopharyngeal c...

Four new guaianolides, sinodielides A-D (1-4), were isolated from Sinodielsia yunnanensis WOLFF together with a known polyacetylene, falcarindiol, and two known coumarins, bergapten and scopoletin. Their structures were established by spectral and X-ray analyses.