女贞子中发芽抑制物质化学成分的研究

女贞子是木樨科植物女贞(Ligustrum Lucidum Ait.)的果实。近年来,发现女贞子在农业生产上具有抑制种子萌发的作用。但关于女贞子中起抑制作用的主要有效成分,国内外尚未有报道,本研究利用活性追踪的方法,对女贞子中的水溶性物质进行了逐步地分离纯化,得到了一种白色粉末状化合物,通过物理常数测定、化学定性反应以及光谱测定(IR.UV.H~1 NMR),确定该化合物是女贞甙.研究表明:女贞子中含有多种抑制成分,而女贞甙是主要的抑制物质,它在2.5×10~(-3)mol或更高浓度时,在所观察的时间内。对小麦和白菜种子的萌发与生长产生明显的抑制作用。     

军校图书馆电子阅览室管理与发展

论文简述了军校图书馆电子阅览室的建立 ,以及军校电子阅览室的性质 ,结合实际探讨了电子阅览室管理当中的一些现实问题 ,针对当前管理的误区提出了军校电子阅览室的管理构想以及工作的重点与发展方向。     

Minority Language Issues in Chinese Higher Education: Policy Reforms and Practice among the Korean and Mongol Ethnic Groups

The purpose of this study is to compare Korean and Mongol minorities in the People’s Republic of China in terms of their native language preservation and educational experiences at the higher education level, and to investigate differences and similarities between Korean and Mongol minorities’ language issues. Content area experts on Chinese minority education from China, South Korea, and the United States were interviewed for this study. Findings include suggestions for helping to formulate government educational policies regarding issues related to language in Chinese minority education at the higher education level. This information is helpful to better understand and educate others in school and home settings where Chinese ethnic minority students reside. The advancement of Chinese minority education knowledge related to higher education will significantly strengthen and empower individuals, families, and communities throughout the People’s Republic of China.     

图式教学策略的实验研究

对l13名高二年级的学生进行对比实验研究，剖析图式对概念学习的影响。研究结果表明：1．图式理论对概念学习具有普遍的指导作用；2．比起常规教学，图式教学更有利于学生学习概念，特别是数学概念的学习；3．教会学生构建图式是解决中、差生问题的有效途径。     

现代中国的教育开发西部活动初探

在现代中国,一大批忧国忧民的志士仁人为了兴邦强国,对西部进行了卓有成效的开发,保证西部社会可持续发展,以科技和教育为主要手段,通过普及教育,提高民众文化素质,开展学术研究和文化传播,开发地方经济和文化资源,为当今方兴未艾的西部开发提供了宝贵的历史。     

Influence of low protein diets on gene expression of digestive enzymes and hormone secretion in the gastrointestinal tract of young weaned piglets

To investigate dietary protein level effects on digestive mechanisms, weaned piglets were fed for 45 d with diets containing 20%, 17%, or 14% crude protein (CP) supplemented to meet requirements for essential amino acids. This article describes the influence of dietary protein on gastrointestinal hormones and expression of an array of digestive enzymes in the gastrointestinal tract and pancreas. Results indicated that there were no significant differences in expression of enzymes involved in carbohydrate digestion, except for maltase in the duodenum. In the jejunum, amylase expression in pigs fed 20% CP was much higher than that in pigs fed other diets (P<0.05) and maltase expression in those fed 17% CP was higher than that in other treatments (P<0.05). Although there were no remarkable differences in expression of aminopeptidase in the small intestine or carboxypeptidase in the pancreas (P>0.05), there was a trend towards higher expression of various proteases in pigs fed 17% CP. The duodenal expression of enteropeptidase in diets with 14% and 17% CP was significantly higher than that with 20% CP (P<0.05), but treatment differences did not existed in jejunum (P>0.05). The expression of GPR93 as a nutrient-responsive G protein-coupled receptor in 14% and 17% CP diets was significantly higher than that in 20% CP diet in the small intestine (P<0.05). The expressions of genes for pancreatic enzymes, lipase and elastase, were significantly higher in pigs fed diets with low CP, while similar trends occurred for carboxypeptidase, chymotrypsin and amylase. Conversely, the gastric expressions of pepsinogen A and progastricsin were lower with the 17% CP diet. Differences between treatments were found in the gastric antral contents of cholecystokinin and somatostatin: both increased in pigs fed 17% CP, accompanied by decreased content of motilin, which was also seen in plasma concentrations. These patterns were not reflected in duodenal contents. In general, 17% dietary CP was beneficial to the digestion of nutrient substance in the gastrointestinal tract.     

试论信息技术与课程整合的意义和原则

文章从信息技术教育的实施模式和为课程改革提供技术支持两方面论述了信息技术和课程整合的意义；根据课程的培养目标和教学论原理及传媒的特点，提出了“整合”－－即信息技术应用于各学科教学过程应遵循的主要原则，并论述了这些原则的意义和主要要求。     

从“双一流”入围名单看高等教育发展的 公平和效率

世界一流大学和一流学科（“双一流”）建设高校及建设学科名单日前公布。“双一流”建 设究竟是为了促进我国高等教育更加公平的发展,还是强调高等教育建设的效率,对此,存在不同 的看法,也由此引发争议。本文基于这一争议,分析政府发展高等教育的责任,提出既重视教育公 平,又提高教育效率的改革建议。     

网络大学热的冷思考

自教育部启动现代远程教育试点以来，网络大学的数量在两年多的时间内，由4所飙升至40余所，面对不断升温的网络大学热，一方面要像对待一切新生事物那样，赋予足够的宽容与热情，另一方面要从教学条件、组织结构，成本与效益等方面进行冷静的理性思考。     

走进哈佛核心课程 --"历史研究"课程的架构

本以1989—1990年、1996—1997年和2001—2002年的哈佛核心课程历史研究部分为例，深入研究了课程的价值：思维方式和研究方法、注重跨学科和多国别的课程设置和以专题讨论为主的课程实施等特点，并在比较我国大学普通教育历史学课程的基础上提出若干意见。