微胶囊膜表面化学组成的XPS分析

采用XPS表面表征技术对生物微胶囊膜表面化学组成进行了分析。结果表明,海藻酸钠_壳聚糖_海藻酸钠(ACA)微胶囊表面带负电荷的含C基团与带正电荷的含N基团的相对百分含量分别为30·6%与60·4%,而海藻酸钠_聚赖氨酸_海藻酸钠(APA)微胶囊分别为42·3%与30·0%,因此ACA微胶囊表面比APA微胶囊带更多的正电荷,更有利于蛋白质吸附与细胞粘附。为深入了解生物微胶囊表面引起的机体反应过程、改进微胶囊性能,提供了理论依据。     

聚焦束泵浦受激曼散射中的聚焦参数及其对转换效率的影响

基于推导得的聚焦束泵浦的受激喇曼散射耦合方程组。从理论上讨论了聚焦对有吸收介质的SRS增长及转换效率的影响规律。建议采用B=L/Z_r和K=l/L作为泵浦束的聚焦参数。为使不同的实验结果可以比较、实验应给出该参数值。     

反相高效液相色谱法测定强力镇痛片中双氯灭痛和阿普唑仑含量

A method fOr simultaneous determination of Liclofenac and Alprazolam in QIANGLI ZHENTONGTablets by RP-HPLC was reported.Chromatographic conditions were:ODS Column as solid phase,Methanol:Water=70:30 as mobile phase, Diclofenac detected at 254nm,Alprazolam detected at 222nm,internal standard:Aminopyrine. The average recoveries of Diclofenac and Alprazolam were 101.37%(n=4)and 102. 73%(n=4)respectively. Coefficients of variation were 1.06%and 1. 73%。 The method was sim-ple,rapid and reliable.