Antioxidant Activity In Vitro of Three Constituents from Caesalpinia sappan L

Antioxidant activities of the 95% ethanol extract from Caesalpinia sappan heartwood （ECS）, protosappanin A, protosappanin B, and brazilein were studied in vitro. The inhibition of the formation of malondialdehyde （MDA） and the scavenging of superoxide anions, hydrogen peroxide, and hydroxyl radicals were assayed. The experimental results show that all four substances had antioxidant activity in vitro but their capabilities differed for the different indicators. ECS, protosappanin A, and protosappanin B show more inhibition of MDA and scavenging of hydrogen peroxide, while brazilein shows more scavenging of hydroxyl radicals. All the samples show little scavenging of superoxide anions.     

图形实体快速定形定位方法

从AutoCAD环境下实现图形实体快速定形定位的问题出发,以实体坐标参数响应为中心,针对不同的适用条件提出4种方法:坐标参数直接输入法;辅助线间接坐标参数法;远距坐标参数多视口法; 'CAL坐标参数法.这些方法能较好地解决复杂实体定形定位问题,提高工程制图效率.     

日本和韩国的图书馆立法状况及其对我国的启示

作为近邻的日本、韩国的图书馆立法已基本成熟,对我国尚在进行中的图书馆立法有着重要的借鉴作用.介绍了日本、韩国图书馆立法的历程,结合我国的实际际情况,阐述了日韩两国图书馆立法对当前我国图书馆立法工作的启示.     

Cerebral Ischemia Reperfusion Exacerbates and Pueraria Flavonoids Attenuate Depressive Responses to Stress in Mice

Previous studies have shown that mice experiencing cerebral ischemia reperfusion （CIR） and stress can serve as a model of post stroke depression （PSD）. The present study verified the acute antidepressant effects of radix puerariae extract （PE） on PSD mice through behavior and gene expression experiments. CIR was found to reduce the sucrose consumption and tyrosine hydroxylase （TH） gene expression. PE administration after CIR surgery was observed to significantly enhance the mRNA expression of TH in the hippocampus compared with the PSD group on Day 0 and Day 3 postsurgery. These findings indicate that PE contributes to the amelioration of behavior response in PSD mice, which is closely related with the protective effects of catecholamine synthesize against CIR brain damage.     

CAD实验教学评估系统信息图形化模块实现

针对CAD中心高校实验教学评估系统提出信息图形化模块方案，论述了该方案实现的理论基础和实现需求，阐述了信息图形化模块的实现方法和实际应用效果。     

立足于新平台的自我超越——解读教育创新

21世纪是创新的世纪，唯有创新才是推动历史前进的车轮。“创新的关键在人才，人才的成长靠教育。”教育兴则国兴，教育强则国强。机遇和挑战并存，教育必须适应社会全方位进步之需，在观念、体制、模式、手段等方面予以创新，方能顺利实现嬗变与重构，为重铸中华辉煌释放出更大的能量。     

工程图学课程网络素材资源包开发

工程图学教学素材资源包是辅助传统工程图学教学的有效资源.就工程图学资源包的开发,分析了实现过程中的图形数据交换技术,可为教学资源的制作提供参考.适于网络发布的资源包内的教学资源有利于共享,针对工程图学网络资源包中典型点线面投影及剖切运动动画,给出了运动分析和实现原型,为工程图学教学资源建设提供参考.