论我国科技系统结构的优化与调整

科技系统结构的优化与调整是关系到国家科技发展的大事 ,因此深入探讨这一问题就显得十分必要。本文就我国科技系统结构调整的历史与现状、存在问题及优化原则等方面进行了探讨     

大学生社会实践活动的意义、存在问题及对策

大学生社会实践是高等教育的重要组成部分,是提升大学生综合素质的重要载体.进入新世纪,大学生社会实践受到党和国家的高度重视,并取得了丰硕成果,但实践中也出现了一些问题,诸如形式实践、过度实践、虚假实践等消极现象拉低了实践活动的质量.基于此,笔者对大学生社会实践活动重入高质量、高价值轨道提出了相关对策.     

Application of derivative ratio spectrophotometry for determination of β-carotene and astaxanthin from Phaffia rhodozyma extract

INTRODUCTION Carotenoids are a class of natural fat-solublepigments generally found in plants, algae, and pho-tosynthetic bacteria, where they play a critical role inthe photosynthetic process. Carotenoids also exist insome non-photo-synthetic bacteria, yeasts, and moldswhere they may carry out a protective functionagainst damages by light and oxygen. Although ani-mals can not synthesize carotenoids within theirbodies, they can intake carotenoids from their dietsleading to bright meat col…     

茶多酚调控自噬改善糖尿病心肌病的机制研究（英文）

目的:探究茶多酚对自噬的调控及对糖尿病心肌病大鼠心功能的影响。创新点:本研究提示了糖尿病可诱导心肌自噬水平增高,而茶多酚可抑制这一现象;相反,高脂血症可抑制心肌自噬,而茶多酚却能诱导被抑制的自噬。方法:各组大鼠造模成功后测定血中的血糖、血脂水平;心超检测大鼠心脏结构及功能变化;苏木精-伊红(HE)染色观察心肌结构及病理改变;透射电镜观察自噬体的形态和数量;蛋白质印迹法(Western blotting)检测自噬相关蛋白LC3-II、SQSTM1/p62及Beclin-1的表达水平。结论:茶多酚对糖尿病心肌病大鼠心功能具有保护作用,机制可能通过调节自噬水平改善糖尿病心肌糖脂代谢紊乱有关。     

永州市对外经贸发展中存在的问题与对策探讨

改革开放以来，永州市的对外经贸取得了很大的发展。本文拟立足永州市对外经贸所取得的成就，分析了对外经贸发展中存在的问题，提出了促进永州市对外经贸发展的应对策略。     

阜阳市农村金融与经济发展关系的实证分析

基于阜阳市2006—2015年的统计数据,通过实地调研,选取农村金融与经济发展的影响因子,实证分析了阜阳市农村金融与经济发展相互促进、相互影响的正相关关系,并从农户、金融机构、政府等不同角度提出了提高农村金融市场的发展效率、促进当地经济发展的建议.     

乙酸纤维素薄膜电泳实验材料和缓冲液的改良替代研究

选用新鲜鸡蛋清作为蛋白电泳样品,通过对巴比妥巴比妥钠、硼酸盐和磷酸盐三种常用缓冲溶液的对比电泳实验研究,综合考虑电泳效果、试剂毒性和药品价格三方面因素,发现鸡蛋清和硼酸盐缓冲溶液完全可以替代传统教学中使用的人血清和巴比妥巴比妥钠缓冲溶液,作为高校蛋白质电泳基础实验教学中的新型实验材料和缓冲溶液.     

Tracking Pre-service Teachers’ Changing Conceptions of Good Science Teaching: The Role of Progressive Reflection with the Same Video

A CD-ROM consisting of videos of two lessons by different teachers demonstrating exemplary science teaching was used to elicit, develop and track the changing conceptions of good science teaching of student teachers enrolled for the one-year Postgraduate Diploma in Education (PGDE) at several stages during the programme. It was found that the videos acted as an effective probe to elicit student teachers’ conceptions and had significant impact on those conceptions at different stages of the programme through the provision of teacher models demonstrating exemplary teaching. The experience has extended novice teachers’ awareness of alternative teaching methods and approaches not experienced in their own schooling, broadened their awareness of different classroom situations, provided proof of existence of good practices and prompted them to reflect on their current conceptions of good science teaching. Most importantly, the strategy of asking student teachers to watch the same videos on three separate occasions at different times of the course was recognized by them as a crucial element in facilitating their reflection on their changing conceptions of good science teaching. PGDE is the standard form of pre-service teacher education in Hong Kong. It provides qualified teacher status within Hong Kong. Student teachers enrolled for the PGDE have completed a relevant undergraduate degree.     

香港《表现指标》之推行研究及其启示

本文简略报告了香港推行《表现指标》的实践探索研究及其成效。该研究历时三年半,共分两个阶段进行,前后共有15位专家、1200多位幼教工作者、上万名幼儿参与。第一阶段研究探索各种推行《表现指标》的实践经验和实践模式﹐出版了《学前教育机构表现指标“学与教范畴”应用指引》(简称《资源套》),供教师参考使用。第二阶段则在64个学前教育机构中尝试使用《资源套》并进行自我评估和自我完善﹐以进一步验证有关经验和模式﹐补充﹑完善《资源套》。该研究为香港特别行政区政府最终大面积推广《表现指标》扫清了主要障碍,做好了理论准备。本文分析了这一经验对内地推行新《纲要》的启示。     

遥聆八股声如雷——八股文的文化学背景与文体学内涵

近现代反传统语境中,科举制与八股文普遍受到不公正对待.从文化角度看,科举制是社会分工体系和科层结构的产物,其内在生命力至今不绝.作为考试文体,八股文已退出历史舞台,但八股文是先民集体性文、文明、文饰、用八诸观念综合作用下的历史产物,其贵重文明、辨物析理的文化精神值得继承.