血浆中游离还原型及氧化型谷胱甘肽的荧光测定法

文章建立了快速、可同时检测血浆中游离的还原型和氧化型谷胱甘肽(即GSH和GSSG)的方法, 并评价了血浆中GSH/GSSG的氧化还原状态。利用二硫苏糖醇将GSSG还原成两分子的GSH,使GSH在pH 8.0时与邻苯二甲醛(OPA)结合生成荧光产物GSH-OPA,用荧光分光光度仪测定其荧光值,从而对GSH和GSSG进行定量分析。并运用此方法测量青年健康志愿者静脉血中的游离GSH和GSSG。该法最低可检测出测定管中11.4 pmol·L-1GSH以及5.7 pmol·L-1GSSG。测量GSH批内和批间变异系数分别4.6%和3.9%,GSSG批内和批间变异系数分别为3.5%和4.1%,GSH,GSSG加标准品后的回收率分别为(99.77±5.70)%和(99.28±4.73)%。测定健康青年志愿者血浆中游离GSH,GSSG的含量分别为(16.5±2.4) nmol·mL-1和(1.7±0.35) nmol·mL-1。     

Different Kinetics of Puerarin in Plasma of Normal and Depressed Rats After Oral Administration of Chinese Medicine TZ18

The objective of this study is to quantify the puerarin in rat plasma following oral administration of TZ18 and compare the pharmacokinetics characteristics of puerarin in normal rats with that in depression model rats. A high performance liquid chromatography method was used to quantify the puerarin due to its good selectivity and linearity (coefficient correlation, r2 = 0.9991) within the tested range (0.028-0.889 μg·mL-1). Intra- and inter-day precision coefficients of variation and accuracy bias were acceptable (Maximum coeffi- cient of variation was 5.74% for intra-day and 3.09% for inter-day) over the entire range. The recoveries were found to be 98.3%, 101.4%, and 103.4% for concentrations of 0.028, 0.222, and 0.444 μg·mL-1, re- spectively. The concentration-time curves for both normal rats and depression model rats were fit to a two- compartment model with the first order absorption. The results show significant differences in the main phar- macokinetic parameters of peak time, peak concentration, and the area under the concentration-time curve between the two kinds of rats.     

基于力控PCAuto的交通灯监控系统设计

随着工业自动化的发展,集散控制系统DCS成为电力、石油、化工、冶金、建材、制药等许多行业的最普通的控制工具。而力控监控组态软件是在自动控制系统监控层一级的软件平台,功能强大,是能够对现场生产数据进行采集与过程控制的专用软件。本文通过基于力控PCAuto的监控系统设计,阐述了如何将组态软件与PLC连接,使其完成对模拟交通灯的实时显示和监控。     

Delayed Postprandial Hypertriglyceridemia, Slow Gastrointestinal Transit and Possible Links Between Them in Alloxan-Induced Diabetic Mice

Both postprandial hypertriglyceridemia and diabetic gastroparesis are common dysfunctions affecting diabetes mellitus; however, whether diabetic gastroparesis has an influence on postprandial hypertriglyceridemia still remains undetermined. Delayed postprandial hypertriglyceridemia, diabetic gastroparesis, and the possible links between them were investigated using alloxan-induced diabetic mice. After the oral administration of olive oil, delayed and exaggerated postprandial hypertriglyceridemia and diabetic gastroparesis were markedly presented in alloxan-induced diabetic mice. Domperidone shortened the time of triglycerides (TG) peak levels in diabetic mice. After intraperitoneal and intraduodenal administration of olive oil, no delay of TG peak levels occurred in diabetic mice. Simultaneously, serum postheparin lipoprotein lipase activities significantly decreased just at the time of prolonged and elevated TG peak levels resulting from diabetic gastroparesis, and further deteriorated postprandial hypertriglyceridemia in diabetic mice. The results indicate that diabetic gastroparesis can be one of the important reasons for delayed and exaggerated postprandial hypertriglyceridemia in diabetes mellitus.     

从"受托"到"决策"--浅议会计目标的阶段性

会计目标的定位问题一直是会计界的热点问题,其中,尤其是从规范性会计目标中衍生出的两种观点受托责任观与决策有用观,到底哪一种更适合中国市场经济的发展,更是众多会计学者争论的焦点.根据我国目前的不完善市场经济转轨中的资本市场这一国情,现阶段应采用受托责任观.与此同时,我国经济发展趋势使决策有用观成为今后必然的发展目标.     

增霸卡在高校机房维护中的应斥

还原卡是现今高校机房日常管理维护中最常用的工具之一。增霸卡在传统还原卡的基础上，增加了诸多基于网络的灵活、便捷的特色功能．例如多操作系统功能、自动修改IP及机器名的功能、断点续传功能、网络增量拷贝功能等。正确有效的使用增霸卡，大大降低了管理维护机房的成本，保证了管理人员能将更多的时间和精力放在提供更好更优质的服务与内容提供，以满足不断变化的机房需求。     

气相色谱-串联质谱法测定化妆品中7种二甲基环硅氧烷

建立了气相色谱-串联质谱法（GC-MS/MS）测定化妆品中7种二甲基环硅氧烷的检测方法。将不同基质化妆品经异丙醇分散、正己烷提取后,以HP-5MS UI毛细管色谱柱（30 m×0.25 mm×0.25μm）分离,采用GC-MS/MS多重反应监测（MRM）模式检测,基质匹配外标法定量。结果显示,7种二甲基环硅氧烷在50～1 000 ng/mL范围内线性关系良好,相关系数（R）为0.996 5～0.999 9;方法检出限（LOD）为4.0～6.1 mg/kg,定量下限（LOQ）为13.2～20.4 mg/kg,平均加标回收率为85.1%～115%,相对标准偏差（RSD）为0.90%～7.0%。采用该方法对市售的102批化妆品进行检测,检出组分涵盖了D4～D9。该方法简便、快速、灵敏、准确,适用于化妆品中7种二甲基环硅氧烷的监测,为保障化妆品的质量安全提供了技术支撑。