Surface-enhanced Raman Spectroscopy(SERS)has been used to characterize hurnic substances.By using HNO<sub>3</sub>-roughened silver foils as the enhancing surface,
A new Mutactimycin group antibiotic(XF-1)was isolated fromthe mycelium of Streptomyces sp.80-115 and its structure has beendetermined on the basis of its spectr
(η<sup>-</sup>C<sub>H</sub><sub>5</sub>)<sub>2</sub>CeCl<sub>5</sub>Mg<sub>2</sub>(tmed)<sub>2</sub> was used as a catalyst to polymerizeisoprene,Terminal ends of
Sublimed D-,L-,and DL-leucine under vacuum were subjected to <sup>60</sup>Co γ-irradiation withdifferent doses.The enantiomeric compositions of samples were de