中职教育与高职教育衔接模式探讨——以交通土建专业为例

"2+3"形式五年制高职教育的中高职教育衔接,是摆在高职学校面前的一个新的课题。衔接中出现的问题是目前中高职教育管理体制、事业发展程度、教学目标、人才培养目标等因素共同作用的产物。只有针对性地采用相应的措施,构建与专业背景匹配的中高职教育衔接模式,才能实现"2+3"形式的中高职教育的真正对接。     

干细胞与再生医学的发展现状及重要意义

文章主要分析了干细胞和再生医学在当今医学研究领域中的发展现状,认为干细胞和再生医学是医学研究领域中的一门新兴学科,它对医学的发展具有引领作用。为凝聚研究力量、规划研究方向和合理整合研究资源,促进我国再生医学研究的发展,认真审视干细胞与再生医学在我国医学研究领域中的布局已成为一个很迫切的问题。     

干细胞技术及其在运动医学领域中的应用与展望

干细胞是一类具有自我更新、高度增殖、多向分化潜能的细胞, 综述了近年来干细胞技术的研究进展及应用价值.其目的在于把干细胞技术应用到运动医学领域, 以治疗由于体育运动而导致的各种损伤提供一条新的思路.     

中国人参茎叶皂甙对大白鼠条件性回避反应的影响

中国人参茎叶皂甙溶于0.9％生理盐水,配制成6mg/100ml,按30mg/kg体重对Wis-tar品系大白鼠进行腹腔注射,开始训练前三天开始注射,之后每天训练前半小时腹腔注人参茎叶皂甙,开始训练的第二十天停止注射,对照组注射相同剂量的生理盐水。实验结果说明给药组较之对照组学习速度要快,但这种作用较缓慢,停药后,人参茎叶皂甙的效果达最高且可持续一段时间,然后下降。此时,再注射人参茎叶皂甙一星期,又可看到均百分数明显升高,且此现象可以持续一段时间。所以给药组的学习记忆可以在高水平巩固一段时间,较之对照组记忆巩固要好。 学习记忆的情况雌鼠较雄鼠为好,给药组和对照组均是这样。给药组大白鼠的体重的增加比对照组快。     

端粒、端粒酶与造血干细胞

端粒是由染色体末端的DN A重复序列组成的,其上有蛋白结合。可保护染色体免受伤害,与细胞周期过程中DN A末端片断的流失、细胞凋亡有关。端粒酶由hTERC和hTERT组成,可以维持端粒的稳定。造血干细胞有一定的端粒酶活性,目前已研究出多种因素影响其表达。端粒酶相关基因修饰干细胞可以达到建立永生化细胞系等目的,亦有很好的应用前景。最近,在研究端粒酶在人类造血系统的作用时,人们把目光集中到一种罕见的遗传病DCK上。治疗这种疾病可能需要进一步的研究来揭示hTERT的内在基因和外来因素的两种调节之间的关系。     

基于技术关键词的学科领域协同演化分析实证研究

[目的/意义]针对处于萌芽期的学科领域文献量不足、技术     

Effects of question stem on pupils’ online questioning,science learning,and critical thinking

The authors investigated the effects of differing question-stem designs (detailed stem, simple stem, and no stem) on elementary students regarding the quality of the posed questions by students, as well as their science reports, science achievements, and critical thinking ability. A quasi-experimental design was adopted. One hundred fifth-grade Taiwanese students were assigned to three groups: detailed stem (G1), simple stem (G2), and no stem (G3). Three pupils formed a team, with each group having 11 teams. The members of each team needed to collaborate for proceeding with an online questioning activity. The results showed that the detailed-stem group had a better questioning quality. For science reports, the detailed-stem group and simple-stem group had a significantly better effect than the no-stem group. Regarding science achievement, there was no significant difference among the three groups. And finally, for critical thinking, the detailed-stem group and no-stem group had a significantly better effect than the simple-stem group.     

15个籼稻杂交组合不同生育时期光合能力研究

对15个水稻组合剑叶在齐穗期和成熟期的光合作用以及茎鞘物质的输出率和转换率进行了研究,结果表明,15个组合中冈46 A/绵恢725和绵5A/辐恢838的特殊配合力最好,冈46 A/科恢746和绵香5A/明恢63的特殊配合力相对较差。     

Science Letters:Brain metastases of melanoma-mechanisms of attack on their defence system by engineered stem cells in the microenvironment

This report gives a better emphasis on the role of targeted effectors (e.g. a combination of 5-FC with CD-NSPCs as compared to the application of NSPCs alone) and how such delivery of pro-drug activating enzymes and other tumor-killing substances may overcome melanocytic defence system, interact with and promote the host defence and immune response modulations not only in melanoma but, potentially, in other highly-metastatic cancers.