电针对血管性痴呆大鼠学习记忆能力及脑血流量的影响

目的：观察电针对血管性痴呆(vascular dementia，VD）模型大鼠学习记忆能力和局部服血流量（regional cerebral blood flow,rCBF )的影响。方法：用双侧颈总动脉反复缺血－再灌注结合腹腔注射硝普钠法，并配合行为学测试确定模型。术后7d电针百会、大椎、足三里（双）治疗。用跳台法评价各组大鼠不同时期的学习记忆能力，治疗后测定各组大鼠顶叶有海马rCBF。结果：VD大鼠在电针治疗后的行为学测试成绩明显提高（P＜0．01），其低下的大脑顶叶及海马rCBF水平明显改善（P＜0．01）。结论：电针对VD大鼠的学习记忆能力有显的改善作用；电针能促使机体低灌流的缺血服组织灌流水平恢复，可能有助于与学习记忆相关的传导环路的修复。     

狗舌草提取物诱导淋巴细胞性白血病L1210细胞分化的研究

以单猪屎豆碱(MO)、槲皮素(QU)和环磷酰胺(CY)为参照,观察了狗舌草600 mL/L乙醇提取物(EX)对淋巴细胞性白血病L1210细胞体外试验的形态变化;利用流式细胞术,从DNA分子水平上检查了EX对L1210细胞各周期相的影响,探讨EX对L1210细胞的分化机理。结果发现,EX能够使L1210细胞向淋巴细胞方向发展;经EX作用24 h后,L1210细胞G0 G1期的百分比较对照组明显升高。提示EX对L1210细胞增殖的抑制作用可能是由于G1期的阻滞所致。     

芪丹通脉片对健康犬冠状动脉血流量及阻力影响

目的：观察复方中药制剂芪丹通脉片对健康犬心脏冠状动脉血流量及阻力的影响,方法：分离犬的冠状动物左旋支及主动脉根部,放置电磁流量计探头,测定不同药物在给药前后不同时刻碱诉冠状动脉血流量,计算冠状动脉阻力。结果：芪丹通脉片高剂量（生药2g/kg)能明显增加冠状动脉血流量,减少冠状动脉阻力,结论：芪丹通脉片能够增加冠状动脉血流量,调整和改善心肌供血,为缺血性心脏病的治疗提供了实验论据。     

The optimisation of fingermark enhancement by VMD and Lumicyano™ on thermal paper

The enhancement of fingermarks on thermal paper can be challenging due to background staining caused by polar solvents used in fingermark enhancement techniques such as ninhydrin. This study explored a commercial one-step superglue fuming process, Lumicyano™, and Vacuum Metal Deposition (VMD) to develop fingermarks on this substrate and overcome this issue. Different sequential treatments involving Lumicyano™ and a combination of VMD methods were investigated with varying degrees of success with some sequences being highly sensitive. The VMD processes, however, were observed to generally be more effective at enhancing marks, whereas Lumicyano™ provided little or no benefit on this paper type. The results indicate that Lumicyano™ is only beneficial as a pre-treatment when the entire sequence of gold/zinc and silver/zinc is taken to completion. The gold/zinc and silver/zinc VMD processes were optimised on five different thermal papers, and the optimised techniques were then directly compared to determine which was more successful on each thermal paper type as a single treatment.     

关于长春市职工工作满意度的调查

工作满意度表达着人们对工作状况的自我感受,与职业变动、社会流动有一定的关联,可以成为测量社会流动的一个指标。调查发现,目前长春市职工的工作满意度并不是很高,得分仅为3．22。提高职工的工作满意度。必须做好多方面的工作,对此本提出了相应的建议。     

广域组织RCEP下我国货物贸易流量的影响因素——基于静态面板数据的贸易引力模型

在广域一体化组织RCEP的区域范围内,运用基于静态面板数据的贸易引力模型分析方法,对我国货物贸易流量影响因素的问题进行了研究。首先探讨了什么是RCEP及其发展历程,其次对我国与其他RCEP成员国间的货物贸易流量进行描述性统计,接着对货物出口流量与GDP等诸多影响因素间的关系进行实证研究,再通过对描述性统计和计量研究进行总结,认为我国与其他RCEP成员国间的货物贸易增长较快但增长率并不稳定,GDP和距离因素是影响相互间贸易的主要因素,人口数量、TPP及FTA是次要因素。     

数字经济时代的全球数据安全治理与中国策略

进入数字经济时代以来,日益严峻的数据安全风险与变幻莫测的国际形势交织叠加,各国围绕数据安全治理规则博弈呈现加剧态势,引发全球数据安全治理问题。各国际行为体虽然已经意识到数据安全治理的重要性,但对全球数据安全治理并未形成统一的治理框架。全球数据安全治理仅仅由单边、双边和多边框架以及贸易规则拼凑而成,相关治理议题在公民个人、社会、经济以及国家安全等多个层面相继涌现。多领域多维度的数据安全问题难免造成治理主体利益诉求的差异,也导致全球数据安全治理出现了规则碎片化、机制效用不足、治理乏力等问题。与此同时,个别国家的数据霸权主义行为更是使得国际行为体难以凝聚共识,全球数据安全治理步履蹒跚,重视和加强对全球数据安全问题的治理迫在眉睫。中国高度重视数据安全的相关议题,由于中国在数据治理领域起步较晚,仍存在立法不完善、技术创新能力薄弱、国际合作不足、治理乏力等问题。中国需要全面、系统地分析影响数据安全的各种重大风险因素,准确把握全球数据安全趋势,进一步优化中国在全球数据安全治理中的策略选择。     

基于分形理论的东南亚旅华客流空间结构演变研究

本文以1999～2010年东南亚旅华游客人次统计为样本，运用分形理论研究了东南亚旅华客流空间结构的演变及其影响因素。结果表明：东南亚旅华客流空间结构分布具有分形特征，1999～2010年间各年无标度区范围呈逐步扩大趋势，分形结构产生由局部分形→单分形→局部分形→双分形的发展变化。危机事件、旅游资源禀赋差异和区位因素是东南亚旅华客流空间结构演变的主要影响因素。     

A Rationale and Method for Examining Reasons for Linkages Among Adolescent Risk Behaviors

A large volume of research has investigated interrelations among adolescent risk behaviors. Although several theoretical accounts have been proposed, researchers have not directly examined hypotheses for why risk behaviors are linked. In the present paper, a distinction is drawn between predictive factors that explain variance in risk behaviors and “linkage factors” which may provide an explanation for why risk behaviors are interrelated. The relevance of linkage factors to risk behavior research, theory, and practice is described. Further, a simple to use and easy to interpret analytic technique for exploring linkage-related issues is illustrated. Using this technique, hypotheses regarding the role of predictors in explaining linkages among risk behaviors can be tested directly. The proposed line of inquiry will provide valuable input for intervention efforts and theoretically relevant information concerning linkages among adolescent risk behaviors. Research Associate at the Brock Research Institute for Youth Studies at Brock University, Ontario, Canada. He received his M.A. in Clinical Psychology from the University of North Dakota. His major research interests are adolescent risk behavior involvement and youth activity involvement as a context for positive development. Professor in the Department of Child and Youth Studies at Brock University, Ontario, Canada. She received her Ph.D. in Developmental Psychology from the University of Waterloo. Her major research interests include adolescent risk taking and resilience, including academic underachievement and media/technology influences on lifestyle choices and learning. Assistant Professor in the Department of Child and Youth Studies at Brock University, Ontario, Canada. She received her Ph.D. in Developmental Psychology from Brock University. Her major research interests are adolescent risk-behavior involvement, particularly related to gambling, and risk and resilience.     

小学生学习书法的心理偏差分析

经过大量的社会调查,发现大多数学习书法的小学生是在众多的压力之下,同时又是在缺少愉快心理的过程中度过的。为什么欣赏起来赏心悦目的书法,学起来却令人痛苦不堪呢?这主要是小学生学习书法的心理偏差造成的,只有消除偏差,才能培养他们学习书法的积极性。