东湖沿岸带底栖藻类群落的时空变化

武汉东湖是一个浅水富营养湖泊,其沿岸带底栖藻类群落的季节分布特征明显,夏季的优势种群是一些体积很小的硅藻类曲壳藻(Achnanthes spp.),其他大部分季节是绿藻门的团集刚毛藻(Cladophora glomerata)和硅藻门的变异直链藻(Melosira varians)。不同样点间的底栖藻类现存量差异不显著,但优势种类不同,以团集刚毛藻为优势的绿藻在处于中富营养区域的磨山样点比例最高,以变异直链藻为优势种的硅藻在严重富营养化的水果湖样点中比例最高。底栖藻类月平均现存量(以叶绿素a计)的时间变

论新闻与公共关系

新闻与公共关系从一开始就是既相互依存又相互对立的。从实务界到学界,关于新闻与公共关系二者应该互斥还是合作的争论持续了多年。然而,从现实以及未来发展趋势看,随着现代社会组织化程度的不断加深,记者和媒体对作为消息源的组织依赖也日益加深,公共新闻学理论和现代公关理念的渐行渐近,使新闻与公共关系的合作成为必然。新闻与公共关系都是社会的润滑剂。告知真相、建构社会,正在成为新闻和公共关系的共同目标

Predictive Control Algorithm Based on High-Order Fuzzy Internal Model and Its Applications in Intermittent Coal Gasification Reactors

针对大时滞系统,提出一种高阶模糊内模预测控制算法。通过引入智能因子,被控对象的高阶模糊内部模型可实时预测对象输出,在线修正模型失配,从而克服时滞因素的不利影响。将算法应用于化工间歇造气炉集散控制系统中,现场运行结果验证了算法的实用性。A predictive control algorithm based on high--order fuzzy internal model, which aimed at systems with dead time, is proposed. By introducing intelligent factor, the high--order fuzzy internal model of controlled plant can forecast output of process in time and modify model uncertainty so as to overcome the disadvantages of dead time. Running results certify its practical values in apply-- ing the algorithm to the distributed control systems of coal gasification reactors.福建省青年科技人才创新资助项目(No.2004J020

加强新时代教育科学研究工作（笔谈）

2019年11月,教育部印发《教育部关于加强新时代教育科学研究工作的意见》(以下简称《意见》),这是新中国成立以来教育部印发的首个教育科研规范性文件,对做好新时代教育科研工作具有重大开创性意义。《意见》是指导新时代教育科学研究工作的纲领性文件,在进一步明确了新时代教育科研工作的指导思想、目标任务和思路举措的同时,还为做好新时代教育科研工作提供了强大的政策支持和制度保障。为进一步学习好《意见》精神,推动建设具有中国特色、世界水平的教育科学理论体系,不断提升教育科研质量和服务水平,《中国高教研究》编辑部与厦门大学高等教育发展研究中心邀请高等教育研究领域的六位专家学者,从不同角度为新时代加强高等教育科学研究工作贡献智慧

Over-expression of Pygo2 Promotes C6 Cells Proliferation of Glioma

目的通过构建过表达PygO2的重组体上调PygO2表达,探讨其在大鼠胶质瘤C6细胞增殖中的作用及机制。方法重组体经ECOr I和HIndⅢ双酶切鉴定和dnA测序后,用脂质体2000将其转染大鼠胶质瘤C6细胞,采用WESTErn blOT检测外源PygO2蛋白表达,应用克隆形成实验和MTT法检测细胞增殖,流式细胞术检测细胞周期,采用WESTErn blOT检测过表达PygO2对C6细胞中CyClInd1、β-CATEnIn水平的影响,并采用细胞免疫荧光法检测其对C6细胞中CyClInd1、β-CATEnIn亚细胞定位的影响。结果双酶切和测序鉴定结果证实插入序列正确,重组体能有效上调PygO2表达。将重组体转染C6细胞上调PygO2表达后,细胞的生长增殖被显著促进,克隆形成显著增多,细胞周期进程从g1期至S期转变显著增强;且CyClInd1水平随之增高,亚定位无改变,β-CATEnIn水平和亚细胞定位无明显改变。结论成功构建了过表达PygO2的重组体,过表达PygO2通过增高CyClInd1水平,促进细胞从g1期进入S期,从而促进大鼠胶质瘤C6细胞增殖。Objective To up-regulate expression of Pygopus2(Pygo2) by construction of the recombinant vectors of over-expression of Pygo2 protein,and to explore the role and mechanism of over-expression of Pygo2 in C6 cells proliferation of glioma.Methods The recombinant plasmids were digested with EcoRⅠ and Hind Ⅲ to execute the restriction endonuclease identification,then the sequence analysis was assayed by DNA sequencing.The recombinant plasmids were transfected into cultured glioblastoma C6 cells using lipofectamineTM 2000.The exogenous Pygo2 protein level of C6 cells was detected by Western blot analysis.Colony forming assay and MTT assay were used to detect the cell proliferation,and cell cycle analysis was performed by flow cytometry analysis.The effect of Pygo2 over-expression on the level of cyclinD1 and β-catenin of C6 cells was detected by Western blot analysis,and the expression and subcellular location of cyclinD1 and β-catenin of C6 cells were further quantified by immunofluorescent staining.Results The recombinant plasmids were completely coincided with the designs by the restriction map and the sequence analysis,which up-regulated Pygo2 expression of C6 cells efficiently.After Pygo2 expression were up-regulated by transfected C6 cells with the recombinant plasmids,cells proliferation was promoted and colony forming was increased significantly,cell cycle progression from G1 to S transition was enhanced notably.Furthermore,the expression level of cyclinD1 was significantly increased without change of subcellular location,and the expression level and subcellular location of β-catenin were not changed obviously.Conclusion The recombinant vectors of Pygo2 over-expression were constructed successfully.Over-expression of Pygo2 promotes the growth of glioma cells by an increased expression of cyclinD1 to improve G1/S transition.重庆市自然科学基金资助项目(cstc2011jjA10110);重庆市教委科技基金资助项目(KJ100504);福建省自然科学基金资助项目(2009D002

SDF-1α/CXCR4信号通路对轴向应力刺激促进骨再生中影响的实验研究

目的 通过轴向应力刺激促进骨再生,观察基质细胞衍生因子1α/趋化因子CXC亚族受体4(stromal cell-derived-factor-1α/cysteine X cysteine receptor 4,SDF-1α/CXCR4)信号通路变化,探讨轴向应力刺激促进骨再生的机制。方法 取72只雄性新西兰大白兔,于右后肢胫骨近端内侧制备直径8 mm圆形皮质骨缺损并脱蛋白松质骨支架修复模型后,随机分为3组(n=24)。A组腹腔注射PBS,B组术肢给予应力刺激治疗+腹腔注射PBS,C组术肢给予应力刺激治疗+腹腔注射CXCR4拮抗剂(AMD3100)。术后2、4、8、12周,摄X线片并采用Lane-SandhuX线评分标准评价骨愈合情况,取标本行HE染色观察新生骨组织及支架降解,免疫组织化学染色观察VEGF、CXCR4表达水平;4、8周取标本Western blot检测SDF-1α及CXCR4蛋白表达水平。12周行Micro-CT检查,计算新生骨体积及新生骨密度。结果 X线片检查示,除术后2周各组骨缺损区及支架无明显变化外,4、8及12周时B组骨愈合评分均优于A、C组(P<0.05)。12周时Micro-CT扫描可见B组骨缺损修复、髓腔再通,新生骨体积及骨密度均高于A、C组(P<0.05)。HE染色显示,术后4周开始B组骨再生及支架降解均明显快于A、C组。免疫组织化学染色示,各组VEGF及CXCR4阳性表达均在4周时达峰值;各时间点B组VEGF及CXCR4表达量均显著高于A、C组(P<0.05)。Western blot检测显示,4、8周时B组SDF-1α与CXCR4表达量均显著高于A、C组(P<0.05)。结论 轴向应力刺激促进骨再生可能与其促进骨缺损区组织高表达SDF-1α,激活与其下游调控BMSCs募集的CXCR4信号有关

SDF-1α/CXCR4信号通路在轴向应力刺激促进骨再生中的作用研究

目的通过轴向应力刺激促进骨再生,观察基质细胞衍生因子1α/趋化因子CXC亚族受体4(stromal cell-derived factor 1α/cysteine X cysteine receptor 4,SDF-1α/CXCR4)信号通路变化,探讨轴向应力刺激促进骨再生的机制。方法取72只雄性新西兰大白兔,于右后肢胫骨近端内侧制备直径8 mm圆形皮质骨缺损并脱蛋白松质骨支架修复模型,随机分为3组(n=24)。A组腹腔注射PBS,B组术肢给予应力刺激治疗+腹腔注射PBS,C组术肢给予应力刺激治疗+腹腔注射CXCR4拮抗剂(AMD3100)。术后2、4、8、12周,摄X线片并采用Lane-Sandhu X线评分标准评价骨愈合情况,取标本行HE染色观察新生骨组织及支架降解,免疫组织化学染色观察VEGF、CXCR4表达水平;4、8周取标本Western blot检测SDF-1α及CXCR4蛋白表达水平;12周行Micro-CT检查,计算新生骨体积及新生骨密度。结果 X线片检查示,除术后2周各组骨缺损区及支架无明显变化外,4、8及12周时B组骨愈合评分均高于A、C组(P<0.05)。12周时Micro-CT扫描可见B组骨缺损修复、髓腔再通,新生骨体积及骨密度均高于A、C组(P<0.05)。HE染色显示,术后4周开始B组骨再生及支架降解均明显快于A、C组。免疫组织化学染色示,各组VEGF及CXCR4阳性表达均在4周达峰值;各时间点B组VEGF及CXCR4表达量均显著高于A、C组(P<0.05)。Western blot检测显示,4、8周时B组SDF-1α与CXCR4表达量均显著高于A、C组(P<0.05)。结论轴向应力刺激促进骨再生可能与其促进骨缺损区组织高表达SDF-1α,激活与其下游调控BMSCs募集的CXCR4信号有关。国家自然科学基金资助项目(81401783);;\n福建省自然科学基金资助项目(2016J05208);;\n军队后勤科研项目基金(CNJ16C013);;\n军队青年医学科技培育项目(19QNP046)~

SDF-1α/CXCR4信号通路在轴向应力刺激促进骨再生中的作用研究

目的 通过轴向应力刺激促进骨再生,观察基质细胞衍生因子1α/趋化因子CXC亚族受体4(stromal cell-derived-factor-1α/cysteine X cysteine receptor 4,SDF-1α/CXCR4)信号通路变化,探讨轴向应力刺激促进骨再生的机制..

影响中晚期肝细胞肝癌手术切除预后的多因素分析

探讨影响中晚期肝细胞肝癌手术切除预后的因素。方法对130例中晚期大肝癌随访1～7年,采用单因素、多因素分析统计不同预后因素对患者生存率的影响。结果手术后1,3 ,5年生存率分别81.7%,24.3%,18.4%。单因素分析提示影响预后的因素为肝癌大小、是否早期复发、肝硬化情况、输血量;多因素分析提示肝癌大小、肿瘤早期复发是影响肝癌术后的预后因素。结论：中晚期肝癌手术切除预后仍不理想,重视围手术期处理,预防术后早期复发有望提高手术疗效 [英文摘要]Objective To study the prognostic factors in patients who received hepatectomy for large hepatocellular carcinoma(HCC). Methods 130 patients operated for large HCC were followed up for 1～7 years. Twenty possible factors were analyzed by Kaplan-Meier Log rank estimate. A multivariative survival analysis of these individal variable was undertaken using the cumulative survival rate by the computers COX proportional hazard. Result The overall cumulative survival rate at 1,3,5 years was 81.7%,24.3%,18.4% re..