沢吨染料的光化漂白动力学及全息特性研究

研究了以三乙醇胺作为引发剂,五种沢吨染料的光化漂白过程.实验结果表明五种染料的光化漂白速率大小顺序是藻红B（ErB）＞曙红Y（EY）＞孟加拉玫瑰红B（RsB）＞罗丹明B（RoB）＞荧光素（F）.并研究了曝光强度及染料浓度对漂白过程的影响,以及这五种染料的全息记录性能.

Photoluminescence investigation of charge build-up process in the emitter of a double-barrier resonant tunneling structure

Charge build-up process in the emitter of a double-barrier resonant tunneling structure is studied by using photoluminescence spectroscopy. Clear evidence is obtained that the charge accumulation in the emitter keeps almost constant with bias voltages in the resonant regime, while it increases remarkably with bias voltages beyond resonant regime. The optical results are in good agreement with the electrical measurement. It is demonstrated that the band gap renormalization plays a certain rob in the experiment.

洗煤废水对环境的影响

煤作为重要的能源物质,在提供能量的同时,也对生态系统产生巨大的负面效应,尤其在产煤过程中产生的酸性洗煤废水对矿区周边生态环境造成严重破坏.如:波兰奥得河和维斯瓦河的上游因受酸性煤矿废水污染的影响,重金属及氯化物含量超标,大约50%的上游河段未达到水质Ⅲ级标准(Rybicka,1996);美国俄亥俄州霍金河流域受酸性煤矿废水季节性变化的影响,河流生态系统也随之发生改变(Rob-ert等,2001);我国山西省大同市口泉煤矿直接排放的洗煤废水导致附近河流下游断面水质为Ⅴ级,且SO42-、氨氮、Hg、COD和氟化物等超标率很高(时红,2002).……　煤炭作为重要的能源物质,在提供能量的同时,也对生态系统产生巨大的负面效应,尤其在产煤过程中产生的酸性洗煤废水对矿区周边生态环境造成严重破坏.如:波兰奥得河和维斯瓦河的上游因受酸性煤矿废水污染的影响,重金属及氯化物含量超标,大约50%的上游河段未达到水质Ⅲ级标准(Rybicka,1996);美国俄亥俄州霍金河流域受酸性煤矿废水季节性变化的影响,河流生态系统也随之发生改变(Rob-ert等,2001);我国山西省大同市口泉煤矿直接排放的洗煤废水导致附近河流下游断面水质为Ⅴ级,且SO42-、氨氮、Hg、COD和氟化物等超标率很高(时红,2002).