| [observational study of black carbon aerosol during straw-burning period]. | black carbon aerosol (bc) has been measured at three sites in hefei city during may and june, 2007. analyzing these real-time bc data, the concentration characters and the sources of black carbon aerosol can be found. the average concentrations of bc in normal period and straw-burning period are 4.85 microg/m3 and 8.38 microg/m3, respectively. the significant difference shows that the straw-burning is one of the main sources. the correlation coefficients between daily average concentration of bc ... | 2008 | 19256359 |
| survey of susceptibilities to monosultap, triazophos, fipronil, and abamectin in chilo suppressalis (lepidoptera: crambidae). | to provide a foundation for national resistance management of the asiatic rice borer, chilo suppressalis (walker) (lepidoptera: crambidae), a study was carried out to determine dose-response and susceptibility changes over a 5-yr period in the insect from representative rice, oryza sativa l., production regions. in total, 11 populations were collected from 2002 to 2006 in seven rice-growing provinces in china, and they were used to examine their susceptibility levels to monosultap, triazophos, f ... | 2007 | 18232403 |