紫外分光光度法测定黄藤素注射液中盐酸巴马汀含量的探索

采用紫外分光光度法测定黄藤素注射液中盐酸巴马汀的含量,同时与药典方法进行比较,两者无显著差异。试验结果表明,该方法简便,快捷,灵敏度高,重现性好,可用于黄藤素注射液成品或半成品中盐酸巴马汀含量的快速测定和质量控制。     

Large-scale magnetic structures of coronal mass ejections

Based on the studies on the source regions of a group of coronal mass ejections, we have identified two types of large-scale magnetic structures, and suggested that they are intrinsic components of solar magnetism, their destabilization, expansion, and eruption into the interplanetary space are the basic physical processes which lead to the coronal mass ejections. These two types of large-scale structures are giant magnetic loops connecting the two active belts on the opposite hemispheres of the Sun, and the giant filaments (filament channels) and their related magnetic structures. The latter often appear as two parallel rows of sunspots and plage fields, which align side by side in the full disk daily and synoptic magnetograms. The magnetic neutral lines of these large-scale structures are usually longer than 50 heliographic degrees. We name this type of structure "super A configuration". Sometimes, they are shown as very long filaments and related large-scale magnetic fields. As these magnetic structures are of very large scale, they extend to a great altitude into the corona, they are not easily recognized in magnetic field observations which are usually aimed at solar flare studies. To identify these large-scale structures becomes a key to understanding and predicting coronal mass ejections.     

电感耦合等离子体质谱法测定谷物中重金属含量的方法研究

采用微波消解技术,建立电感耦合等离子体质谱法测定谷物中重金属As,Pb,Hg,Cd含量的方法。完善前处理条件,优化仪器工作参数,选取72Ge,115In,209Bi作为内标元素,有效克服基体效应及仪器波动影响,利用干扰校正方程技术,消除多原子离子干扰。测定元素标准曲线相关系数均在0.999 9以上,各元素检出限在0.000 6～0.016 mg·L-1之间,回收率在90%～110%之间,方法的精密度在5%以内,用国家标准物质评价了方法准确性,用标准溶液进行了共存离子干扰试验。研究表明,该方法线性范围宽、精密度好、准确性高,适用于快速测定谷物中重金属元素As,Pb,Hg,Cd。     

炸药材料老化放出微量气体测试技术

从炸药、高分子黏结剂和一些结构支撑材料入手，采用固相微萃取和气相色谱．质谱等气体富集采集和分析测试技术研究了炸药及相关材料老化放出的微量气体组成和变化。一方面建立炸药相关材料及部件老化过程释放的微量以至痕量气体的富集采集和定性定量测试方法，同时初步探讨材料释气原因，分析材料的老化降解和机理。     

显微红外光谱成像技术研究BTF炸药老化中的组分迁移

在贮存老化过程中炸药的组分迁移是常见现象,易迁移组分的迁移、重聚、再结晶等过程对装药的安全性有显著影响,严重的会使得装药发生失效。装药的组分迁移过程的精细化表征是一个难点。本文利用显微红外光谱技术针对BTF炸药组分的分布情况进行了精细表征,进一步研究了BTF在不同温度、不同时间老化过程中BTF的组分分布情况,从中探索了BTF的组分迁移规律及其表征方法。实验获得了BTF的组分分布情况,发现BTF具有较强的耐迁移能力,在经历100,110,130℃进行20,24和17h的老化过程中BTF发生了轻微的迁移现象。该研究表明显微红外光谱技术是一种有效的研究BTF组分迁移规律的表征手段。     

高压芒刺静电场对小鼠LFA-1和ICAM-1表达的影响

采用不同电压高压芒刺静电场对小鼠进行全身辐射,荧光免疫流式细胞术检测蛋白表达量的变化.通过时程/量效研究不同电压高压芒刺静电场对细胞表面分子LFA-1和ICAM-1的影响.剂量效应结果表明,LFA-1和ICAM-1在10～20 kV之间处理组的表达量明显高于对照组（P＜0.01）;在30 kV以上电压表达量明显降低（P＜0.05）;时间进程研究结果表明,处理后2 h开始实验组表达量与对照组相比差异显著,一直持续到24 h.不同电压高压芒刺静电场可引起ICAM-1和LFA-1不同的生物效应,二者的相互作用在免疫调节反应中发挥重要功能.