RESPONSES OF MEMBRANE PROTECTION ENZYME SYSTEM OF TOBACCO LEAVES ON Hg, Cd AND Pb STRESSES IN SOIL

采用盆栽实验,就烟草膜保护酶系统对土壤Hg,Cd,Pb胁迫的响应进行研究。结果表明:随着Hg,Cd,Pb浓度的增加,POD活性逐渐增加,CAT活性逐渐减小,SOD活性在三种元素共同作用时逐渐下降,在元素单一或两两作用时,SOD活性呈单峰曲线,但总体水平仍较低。土壤Hg,Cd,Pb的这种影响表现出三元素共同作用>两两元素作用>单一元素作用。影响的结果造成活性氧产生与清除之间的不平衡,致使相关生理生化过程紊乱。三种重金属对烟草活性氧清除系统的影响表现出明显地协同作用。Pot experiment was used to study the responses of membrane protection enzyme system of tobac- co leaves on Hg, Cd and Pb stresses in soil. The results showed that POD activity gradually increased with increasing concetrations of Hg, Cd and Pb. CAT and SOD activity gradually decreased under three heavy metals common existing and SOD variation curve showed unimodal curve under single or two elements existing with increase of concentration of Hg, Cd and Pb. The effects of Hg, Cd and Pb in soil: three elemets together>two elements together>single element only. The effects resulted in an imbalance - activated oxygen produce and scavenge and physiological biochemical process disorder. There was a synergistic action for the effect of Hg, Cd and Pb in soil on membrane protection enzyme system in tobacco leaves.The research was financially supported by China Postdoctoral Science Foundation

卷曲霉素深部肌内注射致双上臀深部溃疡一例原因分析及护理

患者,女,26岁,颈部淋巴结核及血行播散型肺结核,慢性起病,病程较长。患者于2015年4月入住解放军第三〇九医院结核科,曾予以大剂量激素冲击治疗,后行规律抗结核治疗,为进一步治疗结核,2015年5月开始双侧臀大肌肌内注射卷曲霉素,首次注射后0.5 h即出现注射部位硬结、疼痛,患者未予特殊处理,自行用热毛巾湿敷,疼痛、硬结未见改善。注射完1个疗程(6个月)后,因患者症状好转,国家自然科学基金面上资助项目(81372051);;北京市自然科学基金资助项目(7123229,7122179);;全军医学科技“十二五”重点课题(BWS11C061);;国家重点基础研究发展计划(973计划)(2012CB518104);;中国博士后科学基金面上资助二等资助(2012M512081,2012M521846);;总参军事医学和老年病科研基金(ZCWS14B06

Preparation and biological safety of basic fibroblast growth factor/double-layered collagen composite

背景:胶原特殊的分子结构和生物活性有利于多种细胞黏附、增殖和分化,并可降解为新生组织提供足够空间。目的:制备一种复合负载碱性成纤维细胞生长因子的壳聚糖-肝素纳米粒子双层胶原基复合材料,并评价其生物安全性。方法:制备交联风干胶原膜和交联冻干胶原膜。将壳聚糖-肝素纳米粒滴于交联冻干胶原膜上,再将湿态交联风干胶原膜置于复合纳米粒子的交联冻干胶原膜上风干,即碱性成纤维细胞生长因子/双层胶原基复合材料。采用急性全身毒性试验、溶血试验、热原试验和细胞毒性试验评价其生物安全性。结果与结论:碱性成纤维细胞生长因子/双层胶原基复合材料为双层结构,一侧表面致密,另一侧疏松多孔。在其中间负载碱性成纤维细胞生长因子的壳聚糖-肝素纳米粒子呈不规则球形分布于胶原膜内侧面;急性全身毒性试验、热原试验、溶血试验均为阴性,细胞毒性为0级。说明碱性成纤维细胞生长因子/双层胶原基复合材料具有良好的生物安全性,对机体无毒,符合ISO10993-1评价标准。BACKGROUND: Collagen is a common used scaffold in tissue engineering, its specific molecular structure and biological activity are conducive to a variety of cell adhesion, proliferation and differentiation, and can speed up wound healing and degradation to provide sufficient space for new tissues.OBJECTIVE: To prepare a kind of inhomogeneous double layered collagen composite incorporated with basic fibroblast growth factor (bFGF) loaded chitosan-heparin (CS-Hep) nanoparticles, and to evaluate its biological safety.METHODS: The air-dried dense layer collagen membranes and freeze-dried loose layer collagen membrane were prepared respectively and then cross-linked by D-ribose (termed as CAM and CFM respectively).CS-Hep nanoparticles were prepared and then dropped on the surface of CFM.The wet CAM was laid on the surface of CFM with nanoparticles, and then air dried completely at 4 ℃.The obtained material was termed as bDM.Its physical and chemical properties were investigated.In addition, its bio-safety was also examined through acute systemic toxicity, pyrogen, hemolysis and cellular toxicity tests.RESULTS AND CONCLUSION: The bFGF/double-layered collagen composite was made up of double layers with one dense layer (CAM) and another loose layer (CFM).As part of bDM, CS-Hep nanopartiles with irregular global shape were aligned in the scope of D-period structure of the inner surface of CFM; the bFGF/double-layered collagen composite had no systemic acute toxicity, no cytotoxicity and pyrogen reactions as well as no hemolytic effect.The bFGF/double-layered collagen composite is prepared and found to have good biocompatibility and safety.Moreover, this material conforms to the ISO 10993-1, and can be used as a basic scaffold material in tissue engineering天津市科技支撑计划重点项目(08ZCKFSF02100);博士点基金项目(20101106110042)---

关于“经济发展方式转变进程中的财税政策”的探讨(笔谈)

转变经济发展方式是当前中国的热门话题,而上海在城市发展中又肩负着率先转变的重要任务,在这一意义和背景下,2010年4月24日由上海金融学院学院主办、上海金融学院公共经济管理学院承办的“《中国城市财政发展报告2009/2010:促进‘两个中心’建设的上海城市财政》首发式暨‘经济发展方式转变进程中的财税政策’论坛“在我校举行。与会专家围绕经济发展方式转变进程中的财税政策的“趋势与目标“、“机遇和挑战“、“实施方略“和“地方实践“等四个专题进行研讨,各抒己见,智慧交锋。现将其真知灼见整理摘要与读者分享,以期待更多学者共同关注当前经济发展方式转变进程中的财税政策

滴流床反应器的研究──Ⅱ．采用电化学技术测定液固传质系数

本文针对球形和三叶形填料，采用电化学技术测定滴流床液固传质系数。试验结果表明，低液速下，传质系数与气速无关；从滴流区到脉动区的过渡，气速对传质的影响为最大；在脉动区，传质系数随着气速、液速的提高而提高。填料特性对液固传质也有较大的影响。本文还根据试验结果，提出了计算球形和三叶形填料液回传质系数的数学关联式

滴流床反应器的研究——Ⅰ.确定滴流区与脉动区边界的方法

不同于通常采用的划分滴流床中流区分界点的方法,本文通过分析压降信号的概率密度函数、压降波动标准偏差以及根据液固传质系数的突变,确定滴流床中滴流区向脉动区的转变点。实验结果证明,这两种方法都能够准确、可靠地用来判断滴流床中流动形态的变化

均相非理想流动反应器闭式出口边界条件的不可逆过程热力学分析

本文运用不可逆过程热力学的基本原理,探讨了轴向扩散模型的闭式出口边界条件的形式,建立了反应流动系统的稳定性判据,计算分析了处于线性非平衡区的稳态等温一级可逆反应系统的出口边界条件.结果表明,对于管式非理想流动反应器内一级可逆反应流动体系,出口浓度梯度为零的边界条件似不足以维持系统的稳定性

压降法测量往复振动筛板萃取柱内分散相的滞存率

本文从理论上建立了往复振动筛板萃取柱内分散相总体平均滞存率与压降的关系，测量了各种操作条件下柱内分散相的总体平均滞存率，为开展往复振动筛板萃取柱内两相流动与传质行为的研究提供了基础

往复振动筛板萃取柱内单相流和液-液两相流的压降

从流体动力学基本的原理出发,建立了往复振动筛板萃取柱内单相流和液-液两相流的压降方程。采用文献报道的脉冲筛板萃取柱内单相流动的实验数据和本研究在内径为91mm 的往复振动筛板萃取柱获得的液-液两相流动的实验数据.对所建立的压降方程进行了验证,理论计算结果与实验结果吻合良好

Behavior of Sharing Travel Experiences in Social Media

通过整合理性行为理论和自我决定理论,本文构建了社会化媒体中旅游体验分享行为的研究模型;此外,本文检验了内在动机、外在动机、保护型和获得型面子倾向对旅游体验分享意愿和行为的作用;最后,本文检验了保护型和获得型面子倾向对分享动机与分享意愿之间因果关系的调节效应。本研究通过社会化媒体收集数据,并通过两阶段分析法检验研究模型和假设。研究结果有利于弥补已有旅游体验分享行为研究的理论缺陷,同时为社会化媒体和旅游组织制定合理的激励机制提供理论指导。Drawing on Theory of Reasoned Action（ TRA） and Self-Determination Theory（ SDT）,this paper develops a research model of travel experiences sharing behavior in social media. In addition,this study tests the roles of the intrinsic motivation,extrinsic motivation,protective and acquisitive face orientations on the intention and behavior of sharing tourism experiences. Finally,this study examines how protective and acquisitive face orientations moderate the causal relations of sharing motivations and intention. Our data is collected from social media,and the research model and hypotheses are verified through a two-stage methodology. The results of this study can help make up for the theoretical gaps in the existing literature of sharing travel experience,and provide practical implications for tourism suppliers and social media platforms.福建省社会科学规划重点项目(FJ2015B202)；中央高校基本科研业务费专项资金(20720161052)