Li-LSX分子筛制备及其氮气吸附性能研究

采用两步水热法合成低硅铝比沸石（LSX）,用SEM、TG—DTA和激光粒度分析仪对其进行表征与分析;用水热交换法以Na或K离子为过渡离子,以NH4-LSX为中间产物,在碱性条件下制备Li—LSX,并用BEL比表面分析仪和原子吸收光谱仪对氮气吸附量和锂离子交换度进行表征．结果表明：制备的LSX粒度均匀、结晶度和热稳定性良好,但Li—LSX的热稳定性有所下降;以K离子为过渡离子,NH4-LSX为中间产物制备的LbLSX氮气吸附容量可达到26mL／g,Li离子交换度达到97．1％,LiOH的利用率达到90％以上．     

曲马多PVC膜选择性电极的研制

介绍了一种曲马多ＰＶＣ膜电极。该电极以曲马多——四苯硼缔合物为电活性物质，线性范围为４．０＊１０￣（－５）—４．０＊１０￣（－２）ｍｏｌ／Ｌ，检测下限为１．４＊１０￣（－５）ｍｏｌ／Ｌ，斜率为５９．８ｍＶ／ｐｃ。电极在ｐＨ＝３．０－７．０之间对曲马多的回收率为９６．７％，电极被用于曲马多片剂和针剂中曲马多的含量测定，取得了较为满意的结果。     

离子交换树脂型催化剂在酯化反应中的应用

介绍了离子交换树脂催化剂作为酯化催化剂的应用进展,评述了离子交换树脂催化剂的催化性能和可重复利用性,为离子交换树脂催化剂的进一步改性和应用提供了一定的参考。     

束参数对离子束溅射法所淀积非晶硅电特性的影响

本文论述了用离子束溅射淀积非晶硅(a-Si)和氢化非晶硅(a-Si:H)的方法,提供了加速电压和衬底位置改变对薄膜暗电阻率的影响结果,通过有关淀积工艺条件的研究,得出了一些有用的结论。     

Differences in membrane ion transport between hepatocytes from the periportal and the pericentral areas of the liver lobule

We studied the Na⁺/K⁺ pump, Na⁺/K⁺ ATPase activity, and oxygen consumption (QO₂) in hepatocytes isolated from the periportal (PH) and pericentral (CH) regions of the liver lobule, to provide an insight into the functional properties of these cells. Na⁺/K⁺ pump activity was determined using⁸⁶Rb⁺ (a functional analog of K⁺) and ouabain, a specific inhibitor of this transport system. Our results indicate the the Na⁺/K⁺, pump and Na⁺/K⁺ ATPase activity are significantly lower in CH than in PH, although basal ouabain-sensitive (OS) QO₂ was negligible in both of these cell preparations. However, OSQO₂ was significantly lower in CH than in PH when the Na⁺/K⁺ pump was activated using the ionophore nystatin in a Na⁺-containing medium. These results indicate that the differences in membrane ion transport exist between hepatocytes from different locations of the liver lobule.     

离子束混合对纯铁腐蚀行为的影响

文章介绍了用不同剂量的氮离子束和氩离子束分别轰击纯铁镀铬样品，研究其在１ＮＨ＿２ＳＯ＿４水溶液中的电化学腐蚀行为。结果表明：不同剂量的氮离子束混合样品具有相当好的耐蚀性能；低剂量的氩离子束混合样品也在一定程度上提高了纯铁的耐蚀性能，但高剂量的氩离子束混合却降低了纯铁的耐蚀性能。ｘ光衍射仪的分析，解释了实验结果。     

Evidence that the establishment of pregnancy requires activation of lipoxygenase and phospholipase-A2

Summary The present work investigates the possibility that lipoxygenase products are involved in the biochemical mechanisms of blastocyst implantation by utilizing nordihydroguaiaretic acid (NDGA) and caffeic acid (CA), inhibitors of lipoxygenase enzymes, and quinacrine (QU), an inhibitor of phospholipase-A₂. It has been shown previously that inhibition of cyclooxygenase results in blockade of implantation. The inhibitors were dissolved in a standard medium and 5 l of the solutions were micro-injected into the uterine horns of day-4 pregnant mice. The contralateral horns acted as controls and received only vehicle. A sham-operated group provided normal controls. In 14 NDGA-treated mice, the control horns contained 40 implantations while the treated horns contained only 6 small implantations and 8 resorbing sites. These control horns were comparable to the sham controls. In 14 CA-treated mice, treated horns contained 17 small implantations plus 4 resorptions, whereas the control horns contained 26 small implantations and 4 resorptions. Twelve QU-treated mice exhibited 7 small implantations and 4 resorptions in the treated horns, plus 24 small sites and no resorptions in the control horns. Fourteen sham-operated mice had 95 implantation sites and no resorptions in their 28 horns. The results provide evidence for the involvement of the lipoxygenase enzymes and phospholipase-A₂ in the initial implantation process and in the subsequent development of early pregnancy.     

高压加速辉光放电离子阵鞘层离子轰击靶阴极的蒙特卡罗模拟

用蒙特卡罗方法模拟计算了辉光放电中脉冲加速离子阵鞘层Ｎ＋１，Ｎ＋２离子到达靶阴极表面的能量分布和入射角分布。研究了靶室不同气压和不同温度下能量分布和入射角分布的变化     

荷能离子团簇与介质的相互作用

本文简略介绍在ＭｅＶ量级离子微团簇与介质相互作用领域，我们的年取得的主要成果及意义，实验装置，技术特点，发展方向及应用。