将运城市打造成旅游增长极的可行性分析

目前,山西旅游业却呈现出一种怪象:南冷北热。在晋中晋北一带已经形成了一个完整的旅游链条和路线:那就是以太原为中心,300km范围内的旅游业的快速发展。太原无形之中就成为一个山西北中部旅游业的一个增长极,带动晋中、忻州、大同等沿线旅游业的发展。而晋南地区,尤其是临汾运城市一带,由于远离省会太原,旅游客源较为局限,旅游业发展也比较缓慢,没有最大化利用好其优势旅游资源,导致一些旅游资源的浪费。鉴于此,对运城市发展为晋南地区的增长极做出一些可行性研究。     

安徽省经济增长与环境污染的动态作用机制研究

文章基于安徽省1990-2013年的经济增长数据以及工业“三废”的排放量等环境污染指标,建立了向量自回归(VAR)模型。利用脉冲响应分析以及方差分解技术分析方法来研究经济增长与环境污染之间动态作用机制。结果显示：安徽省经济增长主要依赖于产生工业废气和废水的企业;经济增长对环境污染的解释力较强,而环境污染对经济增长的解释力相对较弱;环境污染对经济增长的推动只能在短期起作用,这种发展模式是不可持续的,并且会形成破坏环境的恶性循环;保护环境、惩治污染与经济增长并非是零和博弈,而是可以相互促进的。     

长三角地区技术进步与人力资本对就业的影响

随着长三角地区经济的快速发展,劳动力需求不断增长,但受多重因素的限制,劳动力供给增速缓慢,致使劳动力市场供求结构失衡。选取长三角地区近24年的相关数据,对该地区的技术进步、人力资本等与就业进行双对数面板回归。实证结果表明：在长三角地区,技术进步与人力资本对就业均起较大促进作用。     

人工巢箱下麻雀窝卵数和生长发育初探

2010年3～5月在人工巢箱条件下,对河池学院校园的麻雀繁殖生态进行了研究。收集的数据有麻雀的窝卵数、卵的特征值、雏鸟生长发育特征等。统计分析表明:麻雀4月初产卵,卵长径为18.85mm±0.98mm、短径为13.76 mm±0.54 mm、卵重为1.89 g±0.31 g、窝卵数3.33枚±1.00枚,育雏期15～18 d。雏鸟体重及外部器官的形态学参数可以用Logistic曲线方程很好地拟合,体重、翅长、跗跖、嘴峰长及18日龄前的尾长均呈"S"型。     

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.     

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。