高校师德师风建设及长效机制研究

加强师德师风建设,是深化教育教学改革,促进高等教育健康发展的重要保证。文章从新时期高校加强师德师风建设的重要性入手,结合实证调查的结果分析,深入探讨构建师德师风建设长效机制的相关对策和建议。     

浅析李遇秋手风琴作品风格

李遇秋是我国著名的作曲家,他的手风琴作品内容丰富、体裁多样,他在手风琴创作的民族化发展上进行的种种民族化的探索,也推动了我国手风琴事业的发展。本文以李遇秋在手风琴创作的民族化探索为主线,首先介绍了李遇秋手风琴创作的一些基本情况,随后从和声、调式、旋律三方面重点分析了李遇秋的作品风格。     

校企合作视角下的高职生就业能力提升研究

高等职业教育的人才培养目标决定了企业是实施高等职业教育不可或缺的主体。校企合作是提升高职生就业能力的有效途径。通过校企合作,加强专业建设,完善就业指导服务体系,优化校园文化,有助于切实提升高职生的就业能力,实现高职生更高质量的就业。     

Reducing the oxidative stress mediates the cardioprotection of bicyclol against ischemia-reperfusion injury in rats

Objective

To investigate the beneficial effect of bicyclol on rat hearts subjected to ischemia-reperfusion (IR) injuries and its possible mechanism.

Methods

Male Sprague-Dawley rats were intragastrically administered with bicyclol (25, 50 or 100 mg/(kg·d)) for 3 d. Myocardial IR was produced by occlusion of the coronary artery for 1 h and reperfusion for 3 h. Left ventricular hemodynamics was continuously monitored. At the end of reperfusion, myocardial infarct was measured by 2,3,5-triphenyltetrazolium chloride (TTC) staining, and serum lactate dehydrogenase (LDH) level and myocardial superoxide dismutase (SOD) activity were determined by spectrophotometry. Isolated ventricular myocytes from adult rats were exposed to 60 min anoxia and 30 min reoxygenation to simulate IR injuries. After reperfusion, cell viability was determined with trypan blue; reactive oxygen species (ROS) and mitochondrial membrane potential of the cardiomyocytes were measured with the fluorescent probe. The mitochondrial permeability transition pore (mPTP) opening induced by Ca²⁺ (200 μmol/L) was measured with the absorbance at 520 nm in the isolated myocardial mitochondria.

Results

Low dose of bicyclol (25 mg/(kg·d)) had no significant improving effect on all cardiac parameters, whereas pretreatment with high bicyclol markedly reduced the myocardial infarct and improved the left ventricular contractility in the myocardium exposed to IR (P<0.05). Medium dose of bicyclol (50 mg/(kg·d)) markedly improved the myocardial contractility, left ventricular myocyte viability, and SOD activity, as well decreased infarct size, serum LDH level, ROS production, and mitochondrial membrane potential in rat myocardium exposed to IR. The reduction of ventricular myocyte viability in IR group was inhibited by pretreatment with 50 and 100 mg/(kg·d) bicyclol (P<0.05 vs. IR), but not by 25 mg/(kg·d) bicyclol. The opening of mPTP evoked by Ca²⁺ was significantly inhibited by medium bicyclol.

Conclusions

Bicyclol exerts cardioprotection against IR injury, at least, via reducing oxidative stress and its subsequent mPTP opening.     

英语专业学生写作中英语习语使用调查——以安徽师范大学学生为例

以Fernando（1996）对英语习语的分类为基础,采用学生作文语料,运用SPSS11．0中的二变量相关分析和配对样本T测试等统计手段进行分析,得出两个结论：1）英语专业学生在作文中使用习语总数随着英语水平的提高而显著增长;2）不同水平的英语专业学生在作文中使用概念习语的数量随着英语水平的提高而显著增长。而使用关系习语的数量在低、中水平和中、高水平阶段却没有显著增长。最后指出本研究对英语习语教学的几点启示,并为英语习语习得研究提出一些建议。     

分子生物学类论文中几类常见名词的正斜体编排

在国内分子生物学类期刊中,基因、蛋白质、限制性内切酶、病毒、质粒等名称的正斜体编排相当混乱。作者在查阅这些分子生物学名称原始命名资料的基础上,参考国内外相关文献,总结出这些名称的正斜体规范编排规则。     

在AutoCAD中OLE自动化的应用

本文讨论了在AutoCAD中OLE自动化的应用编程技术,分析了AutoCAD中的对象模型,并结合一个简单的实例分析了典型对象的使用。     

京津冀一体化战略下河北面临的挑战

京津冀一体化发展是区域经济一体化发展的必然,也是河北难得的发展机遇,同时也给河北带来巨大的挑战。与京津相比,河北在经济、技术、人才等方面都相对较差,对京津产业转移的承接力较弱,为能够抓住机遇,尽快适应协同发展的步伐,河北需要在制度保障、人才培养、产业升级转型等多个方面重点建设。     

高校体育共同课篮球课程教学创新的几点思考

为探求高校体育共同课篮球课程教学创新,本文运用文献资料法、对比法、逻辑分析法对传统篮球课程教学进行理性分析,提出篮球课程教学内容、教学方法、教学手段、教学方式及教学评价的新构思。