Optical limiting properties of a crystal violet cation fulleride salt dissolved in tetrahydrofuran have been studied by using 10 ns,532 nm laser pulses.The fluence-dependent transmissivity measurements were performed ...Optical limiting properties of a crystal violet cation fulleride salt dissolved in tetrahydrofuran have been studied by using 10 ns,532 nm laser pulses.The fluence-dependent transmissivity measurements were performed on the samples with the same concentration and different path lengths in a collimated optical set-up.For comparison,the fluence-dependent transmissivities of fullerene C_(60) and crystal violet solutions were also measured under the same linear transmissivity.The nonlinear optical limiting effect of the fulleride salt in tetrahydrofuran was even slightly stronger than that of C_(60) in toluene.展开更多
新生儿持续性肺动脉高压(persistent pulmonary hypertension of the newborn,PPHN)是指生后肺血管阻力持续性升高,使得胎儿型循环向"成人型"循环转换障碍,从而引起在动脉导管和(或)卵圆孔水平右向左的血液分流,临床上出现严...新生儿持续性肺动脉高压(persistent pulmonary hypertension of the newborn,PPHN)是指生后肺血管阻力持续性升高,使得胎儿型循环向"成人型"循环转换障碍,从而引起在动脉导管和(或)卵圆孔水平右向左的血液分流,临床上出现严重低氧血症,甚至呼吸衰竭。常见于过期产儿、足月儿和近足月儿,存活新生儿中其发生率约为2‰(0.4‰~6.8‰),病死率可达4%~33%,根据病因PPHN可分为肺血管发育不全、肺血管发育不良、肺血管适应不良和内源性梗阻4种类型[1]。展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos.19525412,19974004 and 19884001the National Key Basic Research Special Foundation of China under Grant No.G1999075207.
文摘Optical limiting properties of a crystal violet cation fulleride salt dissolved in tetrahydrofuran have been studied by using 10 ns,532 nm laser pulses.The fluence-dependent transmissivity measurements were performed on the samples with the same concentration and different path lengths in a collimated optical set-up.For comparison,the fluence-dependent transmissivities of fullerene C_(60) and crystal violet solutions were also measured under the same linear transmissivity.The nonlinear optical limiting effect of the fulleride salt in tetrahydrofuran was even slightly stronger than that of C_(60) in toluene.
文摘新生儿持续性肺动脉高压(persistent pulmonary hypertension of the newborn,PPHN)是指生后肺血管阻力持续性升高,使得胎儿型循环向"成人型"循环转换障碍,从而引起在动脉导管和(或)卵圆孔水平右向左的血液分流,临床上出现严重低氧血症,甚至呼吸衰竭。常见于过期产儿、足月儿和近足月儿,存活新生儿中其发生率约为2‰(0.4‰~6.8‰),病死率可达4%~33%,根据病因PPHN可分为肺血管发育不全、肺血管发育不良、肺血管适应不良和内源性梗阻4种类型[1]。
