The removal of nitrate from the underground water by biological reactor with solid organic carbon(cotton,paper,rice straw,wood flour) as carbon source and reaction media was studied.

Study of Carbonation Mechanism in Preparing Ultrafine Calcium Carbonate;

Some new points about cementation mechanism of black pottery has been given out, based upon a lot of technological experiments and results of X-ray powder diffraction, scanning electron microscope, differential thermal analysis and chemical analysis.