A new skeleton taxane diterpene,taxayuntin,was isolated from the leaves and stems ofTaxus yunnanensis.Its structure was determined by spectroscopic methods(MS,<
An empirical potential energy function comprising two-and three-bodyterms, whose parameters have been determiaed from the properties of solid germanium,is used
NMR microscopy has received great attention from various fields of research, especiallymaterial science by its possibility to study materials directly without d
In this paper, a new MPT(microwave plasma torch) device has beenused as a atomizer for atomic fluorescence spectrometry. Spme elements, suchas Zn, Cd, Hg, Pb, A