JR6对人结肠癌细胞HT-29氧化还原系统影响

探讨新型抗肿瘤药物JR6诱导人结肠癌细胞HT-29凋亡机制.使用噻唑兰比色法(MTT)检测JR6对人结肠癌细胞HT-29的生长抑制作用,并测定HT-29细胞中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、过氧化氢酶(CAT)的活性和丙二醛(MDA)浓度.JR6对HT-29细胞生长有明显抑制作用,可以降低HT-29细胞中SOD、GSH-Px、CAT活性,升高MDA浓度.JR6对HT-29细胞有明显的细胞毒作用,其IC50为39.8μg/ml,可能通过影响HT-29细胞中SOD、GSH-Px、CAT活性和MDA浓度,达到诱导HT-29细胞凋亡的目的.     

膜分离技术的应用

报道膜分离技术用于垃圾渗沥水、6-氨基青霉烷酸（6-APA）裂解液以及维生素C发酵液中的分离浓缩过程,各项实验均进行了中试放大,取得了良好的效果。     

IPv6平滑过渡技术的研究

研究在过渡初期IPv4网络如何向IPv6网络过渡,特别是应用程序的过渡问题,结合目前最新的IPv6平滑过渡关键技术与不断积累的实践经验,总结出一种IPv4应用向IPv6应用平滑过渡的套接口代理技术,文中所介绍的过渡方案和技术简单、易操作,符合IEEE NGTRANS组织提出的简单过渡的要求。     

Spectrofluorimetric determination of magnesium (II) with 7-(8-Hydroxy-3, 6-disulfonaphthylazo)-8-hydroxyquinoline-5-sulfonic acid

A new fluorescent reagent, 7-(8-hydroxy-3, 6-disulfonaphthylazo)-8-hydroxyquinoline-5-sulfonic acid (HDNHQ) for the determination of magnesium has been developed. It reacted with magnesium to form a 1∶1 fluorescent complex withλ _ex/λ _em immediately at room temperature in ammonia-ammonium chloride buffer (pH 10.7). A linear relationship was obtained in the magnesium concentration range of 0–160 ng·mL⁻¹ with the detection limit of 0.04 ng·mL⁻¹. The proposed method was simple, rapid and sensitive. It has been successfully applied to the determination of trace magnesium in blood serum with recoveries of 103.75% and 98.16%, respectively. Foundation item: Supported by the Zi-Qiang Foundation of Wuhan University Biography: Zhang Xian (1975-), female, Ph. D candidant, research direction: organic reagent synthesis and analysis.     

鲜食葡萄品种无核化处理的研究

用GA,BA处理新疆地区主载的几种大粒鲜食葡萄品种,结果表明：GA能促进葡萄无籽果粒的形成,混用BA可使处理效果稳定,同时对果实品质及成熟期也有一定的影响。     

IPv6成就下一代互联网

通过IPv4与IPv6的比较,讨论了20世纪的互联网协议IPv4的特性与不足和下一代互联网协议IPv6改进与优点。着重论述了基于移动IPv6协议集成的IP层移动功能和IPv6协议的内置安全机制。预测了在移动通信领域IPv最有可能首先得到广泛应用,实现移动互联 。     

Ge_6H_6几何构型的稳定性和电子结构的研究(英文)

应用GAUSSIAN 92从头算方法研究了Ge6H6 几何构型的稳定性和电子结构 ,主要研究了两种最可能的几何构型 ,发现最稳定的构型是平面六锗苯 .平面六锗苯比棱柱六锗苯的能量低 2 0 .9kJ/mol,我们也研究了平面六锗苯和棱柱六锗苯的电子结构     

新型抗肝片吸虫病药物化合物HBSA-CO1的合成及解偶联活性研究

合成了邻羟基苯磺酰苯胺类药物化合物：Ｎ－（２,５－二甲基－４－本甲酰基）苯基－２－羟基－３,５,６－三氯苯磺酰胺,并对该药物化合物进行了结构表征。采用氧电极法、测呼吸过程中磷的变化以及测ＡＴＰ酶活性等方法研究其对线粒体氧化磷酸化反应的解偶联作用,结果表明,ＨＢＳＡ－ＣＯ１化合物是较好的解偶联剂,其偶联活性高于Ｎ－（２,４,５－三氯）苯基－２羟基－（３,５,６－三氯）本磺酰胺化合和ＤＮＰ。因此,根据     

羰基钼化学气相沉积对模具表面改性的研究

以Mo(CO) 6 为物源在刀具钢回火温度以下实施了气相沉积超硬膜涂覆 ,经实验测试、分析 ,结果表明薄膜中含碳量是影响薄膜表观硬度的重要因素 ,并且该薄膜能改善刀具 (钻头 )的表面力学性能 ,增加其使用寿命     

Hydrothermal synthesis,characterization and nonlinear optical effect of orthorhombic phase Ca2B6O11·H2O

Hydrothermal treatment of calcium oxide and boric acid mixtures at temperatures between 234℃ and 300℃ has produced a colorless,transparent,orthorhombic compound Ca2B6O11.H2O.Of the seven known members of the series of hydrated dicalcium hexaborate containing boron-oxygen six-membered ring anionic group (B3O8)7-,only the title compound has been found to have the nonlinear optical effect.The second harmanic generation (SHG) effect of its crystal is larger than that of KH2PO4 (KDP).The reflection spectrum has shown that this compound has no absorption in the experimental wavelength range (800-240 nm).Its crystal structure is favorable for generating the nonlinear optical effect.