包容性增长的概念、内涵和意义研究

胡锦涛同志在2010年9月举行的第五届亚太经合组织部长会议上正式提出了"包容性增长"的概念。实现包容性增长,根本目的是让经济全球化和经济发展成果惠及所有国家和地区、惠及所有人群,该理论强调增长应该坚持社会公平正义,着力促进人人平等获得发展机会。包容性增长理论是针对新时期新阶段中国发展的特征提出的,深入研究其概念、内涵和意义具有重要的理论价值和实践价值。     

课堂：让智慧点燃智慧

理想的课堂应是＂师生互动、心灵对话＂的舞台,应是＂探求未知、发现知识＂的旅程,应是＂享受成功、体验愉悦＂的乐园,应是＂超越知识、催生智慧＂的沃土。     

Ds-echinoside A, a new triterpene glycoside derived from sea cucumber, exhibits antimetastatic activity via the inhibition of NF-κB-dependent MMP-9 and VEGF expressions

Ds-echinoside A (DSEA), a non-sulfated triterpene glycoside, was isolated from the sea cucumber Pearsonothuria graeffei. In vitro and in vivo investigations were conducted on the effects of DSEA on tumor cell adhesion, migration, invasion, and angiogenesis. In this study, we found that DSEA inhibited the proliferation of human hepatocellular liver carcinoma cells Hep G2, with a half-maximal inhibitory concentration (IC₅₀) of 2.65 μmol/L, and suppressed Hep G2 cell adhesion, migration, and invasion in a dose-dependent manner. DSEA also reduced tube formation of human endothelial cells ECV-304 on matrigel in vitro and attenuated neovascularization in the chick embryo chorioallantoic membrane (CAM) assay in vivo. Immunocytochemical analysis revealed that DSEA significantly decreased the expression of matrix metalloproteinase-9 (MMP-9), which plays an important role in the degradation of basement membrane in tumor metastasis and angiogenesis. DSEA also increased the protein expression level of tissue inhibitor of metalloproteinase-1 (TIMP-1), an important regulator of MMP-9 activation. From the results of Western blotting, the expressions of nuclear factor-kappa B (NF-κB) and vascular endothelial growth factor (VEGF) were found to be remarkably reduced by DSEA. These findings suggest that DSEA exhibits a significant antimetastatic activity through the specific inhibition of NF-κB-dependent MMP-9 and VEGF expressions.     

Effect of epidermal growth factor on follicle-stimulating hormone-induced proliferation of granulosa cells from chicken prehierarchical follicles

The development of ovarian follicular cells is controlled by multiple circulating and local hormones and factors, including follicle-stimulating hormone (FSH) and epidermal growth factor (EGF). In this study, the stage-specific effect of EGF on FSH-induced proliferation of granulosa cells was evaluated in the ovarian follicles of egg-laying chickens. Results showed that EGF and its receptor (EGFR) mRNAs displayed a high expression in granulosa cells from the prehierarchical follicles, including the large white follicle (LWF) and small yellow follicle (SYF), and thereafter the expression decreased markedly to the stage of the largest preovulatory follicle. SYF represents a turning point of EGF/EGFR mRNA expression during follicle selection. Subsequently the granulosa cells from SYF were cultured to reveal the mediation of EGF in FSH action. Cell proliferation was remarkably increased by treatment with either EGF or FSH (0.1–100 ng/ml). This result was confirmed by elevated proliferating cell nuclear antigen (PCNA) expression and decreased cell apoptosis. Furthermore, EGF-induced cell proliferation was accompanied by increased mRNA expressions of EGFR, FSH receptor, and the cell cycle-regulating genes (cyclins D1 and E1, cyclin-dependent kinases 2 and 6) as well as decreased expression of luteinizing hormone receptor mRNA. However, the EGF or FSH-elicited effect was reversed by simultaneous treatment with an EGFR inhibitor AG1478. In conclusion, EGF and EGFR expressions manifested stage-specific changes during follicular development and EGF mediated FSH-induced cell proliferation and retarded cell differentiation in the prehierarchical follicles. These expressions thus stimulated follicular growth before selection in the egg-laying chicken.     

荞麦主要农艺性状研究

对10个苦荞收集系的农艺性状进行了研究,结果发现:10个苦荞收集系中,除了TA4和TA14收集系的苦荞总分枝数与株粒数、主茎节数与株粒数呈负相关外,其余收集系的苦荞株高与株粒数、总分枝数与株粒数、主茎节数与株粒数都呈正相关。并且10个苦荞收集系中的TA8与TA15、TA15与TA4收集系的千粒重之间差异不显著,其余收集系的千粒重之间都具有显著差异性。     

浅析我国民营物流企业成长能力培育途径

近些年来,民营物流企业在快速发展与成长的同时遇到了许多困难和阻力,甚至连生存都成了问题,遭遇了成长"瓶颈"。因此,迫切需要对我国民营物流企业的生存与成长状况进行了解,进而寻找培育其成长能力的途径。     

安徽省出口商品结构与经济增长关系的实证分析

该文以安徽省1995~2012年的工业制成品出口、初级产品出口和GDP的年度统计数据为基础,运用协整理论、格兰杰检验对安徽省的出口商品结构与经济增长之间的关系进行了实证分析。结果表明,出口商品结构的优化与经济增长之间在长期和短期都存在着均衡关系,且工业制成品出口增加对安徽省的经济增长具有单向的推动作用。据此,为继续优化出口商品结构,促进安徽经济持续增长提出政策建议。     

废墟境遇下的理性成长—读王安忆的《启蒙时代》

王安忆的《启蒙时代》拥有明显的"成长"内涵,但小说不再以女性作为成长主体,而是将男性主人公的精神理性成长过程推至文本的前台。主人公成长的"废墟"境遇虽给了他们极大的自由,却也使他们的理性成长历程充满光明与黑暗频繁交替的坎坷。这其中,审父、叛父、回归父亲的曲折历程以及同代人彼此争辩、相互扶助的友谊成为影响他们成长的最重要的理性力量。     

智能手机在“植物生物学实验”本科教学实践中的应用

智能手机以其强大的功能和庞大的用户群正逐渐成为移动学习的主要终端之一。文章介绍了智能手机在本科课程“植物生物学实验”的理论教学、显微摄影和野外实习中的具体运用,并根据实际教学运用首次归纳出基于智能手机进行植物显微摄影的4个主要步骤及5个注意要点。此外,通过问卷调查分析并讨论了当前智能手机在高校本科实验教学实际运用过程中存在的主要问题。     

Modeling Growth in Electronic Learning Environments Using a Longitudinal Random Item Response Model

In educational environments, monitoring persons' progress over time may help teachers to evaluate the effectiveness of their teaching procedures. Electronic learning environments are increasingly being used as part of formal education and resulting datasets can be used to understand and to improve the environment. This study presents longitudinal models based on the item response theory (IRT) for measuring persons' ability within and between study sessions in data from web-based learning environments. Two empirical examples are used to illustrate the presented models. Results show that by incorporating time spent within- and between-study sessions into an IRT model; one is able to track changes in ability of a population of persons or for groups of persons at any time of the learning process.