Increasing requirements on the environmental acceptability of internal combustion engines led to strong efforts to meet the continuously getting stricter emission regulations. New concepts of combustion and injection have been developed together with appropriate techniques of exhaust gas aftertreatment. For diesel engines especially modern high pressure injection systems, such as the applicatio...

A new LiI-promoted O- to N-alkyl migration has been developed for the conversion of O-alkylated 2-hydroxy pyridines, quinolines, and pyrimidines to the corresponding N-alkylated heterocycles in good to excellent yields (57-99%). This method serves as an efficient means for the preparation of N-benzyl pyridones, quinolones, and pyrimidones.

Induction of L1 and L2 -Lactamases of Stenotrophomonas maltophilia Rouh-Mei Hu, Kuang-Jay Huang, Lii-Tzu Wu, Ying-Ju Hsiao, and Tsuey-Ching Yang* Department of Biotechnology and Bioinformatics, Asia University, Taichung 413, Taiwan; Department of Microbiology, China Medical University, Taichung 404, Taiwan; and Department of Medical Laboratory Science and Biotechnology, China Medical University...

Five new species of genus Ptychopter Meigen are described from China: Ptychoptera bannaensis sp. nov., P. lii sp. nov., P. lushuiensis sp. nov., P. qinggouensis sp. nov. and P. wangae sp. nov. A key to the known species of Ptychoptera in China is presented.