Papers by Author: Jin Pan

Abstract: The enamel of tooth is the hardest tissue in human body, which makes it is hard to prepare cross-section slice. Decalcification is an important procedure in paraffin section preparation. Until now, there is no generally well-accepted decalcification method. Two kinds of acids decalcified liquid and Ethylene Diamine Tetraacetic Acid (EDTA) decalcified liquid were used to compare decalcified time and effect. HE staining and SABC immunohistochemical staining were carried out to compare their dyeing effect in three different decalcified liquid. The results showed that two kinds of acids decalcified liquid took less time to reach the thorough decalcified end point than EDTA decalcified liquid. But HE staining and SABC immunohistochemical staining with EDTA decalcified specimens showed better well-organized structure and vivid coloring. Thus, acids decalcified liquid is appropriate for rapid decalcification and preparation of slice. EDTA decalcified liquid is better to be used in the immunohistochemical staining in oral histopathologcal study.

Abstract: In order to infiltrate the molten aluminum alloy to the reinforcement preform by low pressure in casting process and acquire the high performance composites with high density, the effect of the ultrasonic vibration on the infiltration was investigated by model experiments using clear solution and glass or aluminum borate preform, which is correspond to a molten matrix and reinforcement, respectively. Ultrasonic vibration improves the wettability of liquid polyester resin on glass plate, dramatically. The final infiltration height and infiltration speed of liquid polyester resin in glass capillary were improved by the ultrasonic vibration. Furthermore, the infiltration speed of water to aluminum borate preform accelerated by ultrasonic vibration. This effect was more remarkable, when the infiltration height is lower or infiltration time is shorter. In actual, the molten aluminum alloy infiltrate to SiC preform using ultrasonic vibration easily and acquire the high dense composites without pores.