胶束电动毛细管色谱法拆分肾上腺素对映体

胶束电动毛细管色谱法拆分肾上腺素对映体;电化学检测;对映体拆分     

Phase evolution of the reemitted field in the semiconductor quantum wells under the femtosecond pulse train intersubband excitation

Property of the phase of the reemitted field in the semiconductor quantum wells (QWs) excited by femtosecond pulse train is investigated. It is shown that the phase evolution of the reemitted field is controlled by the relative phase between the successive pulses of the incident train. For all the odd pulses excitation, the reemitted field is from out-of-phase to in-phase, then again to out-of-phase with the incident pulses, whereas for all the even pulses excitation, the situation is the opposite, i.e., it is from in-phase to out-of-phase, then again to in-phase with the incident pulses.     

黄酮类化合物与β-环糊精包合物的光谱学表征

用X-射线粉末衍射、差热分析、紫外和红外吸收光谱等测试方法对4种黄酮类化合物与β-环糊精的包合物进行了表征;比较了包合物与游离主、客体的光谱性质的差异。