Effects of gaseous agents on the evolution of char physical and chemical structures during biomass gasification.

Bio-char samples were prepared from gasification of corn straw under N, CO and HO conditions, and systematically characterized to reveal the effects of gaseous agents on the evolution of char structural features during the gasification process. The results showed that the increase of reacting temperature had positive effects on the gasification of char in both HO and CO atmospheres. The evolution of char pore structures under HO and CO was quite different.

4α-Methylergosta-22(E),24(28)-dien-3β-ol, a New Marine Sterol from the Octocoral Nephthea columnaris.

A new marine sterol, 4a-methylergosta-22(E),24(28)-dien-3 P-ol (1), was isolated from the octocoral Nephthea columnaris. The structure of I was elucidated on the basis of spectroscopic and mass spectrometric methods.