Research Advances in Flavonoids and Steroids in Plants of Dracaena Vand. ex L.;

Three steroids were isolated from the sample by silica gel column and their structures were elucidated by comprehensive spectrometric methods as ergosterol,ergosterol peroxide and ergostat-7,22-dien-3β,5α,6β-triol.

Methods: Amino acids were determined by HPLC post column derivatization and steroids by GC MS.

Quantitative determination of steroids in the fruiting bodies and submerged-cultured mycelia of Inonotus obliquus

In the studies on the marine steroids isolated from the South China Sea sponge and soft coral,we summerized the fragmentation mechanism of the most important peaks of mass spectrometry of 5α-saturated nucleus-steryl acetate,4-methya-5α-saturated nucleus steryl acetate and △4-3-ketone and the regular patterns of mass spectrometry of these steroids.

Biological characters of the endophytic fungi from Paris polyphylla var.yunnanensis and their steroidal content;

The Δ~1-dehydrogenation of steroidal compounds by Arthrobacter simplex;

Studies on the Microbial Transformation of Steroids

Detection and analysis methods for steroids were established.

In this paper, a new, simple and rapid method for the analysis of steroids by reversed-phase high per formance liquid chromatography (HPLC) coupled with evaporative light scattering detector(ELSD) is presented' A good resolution of the 12 steroids is obtained within 35 min with a gradient elution using a binary mobile phase composed of methanol and water.

Recently, more and more stable compounds such as steroids, PAHs, pesticide and phenol are poured into the environment, which are not only difficult to degrade but greatly destroy the ecosystem and human s health.