降冰片烯类化合物的合成及其表征研究

本文研究了以环戊二烯和其它含有碳碳双键的化合物为原料，通过Diels-Aider反应，合成了降冰片烯类化合物：5-苯基-2-降冰片烯、5-腈基-2-降冰片烯、5-羧基-2-降冰片烯。实验应用了气相色谱仪（GC）、傅立叶变换红外光谱仪（FT-IR）、气相色谱-盾谱联用仪（GC-MS）对产物进行了表征，取得了满意的结果。     

上海生命科学课程课堂教学目标的制定与实施

本文就上海生命科学课堂教学的教学过程提出建议及一些具体做法,以促进新课程理念更好地转化为课堂教学的实践。     

不同培养基对猴头菇菌丝体生长量及多糖含量的影响

猴头菇子实体、菌丝体和发酵液中提取的多糖物质含有多种生物活性物质和药理作用。本实验分别采用不同液体培养基培养猴头菇菌丝体,并对菌丝体生长量和发酵液中的多糖物质进行测量和比较。最终得出结果,以黄豆芽汁为氮源的液体培养基菌丝体生长量最高;以马铃薯为氮源的液体发酵液中多糖物质含量最高,其次是黄豆芽汁。最终的结论为,黄豆芽汁为氮源的液体培养基对猴头菇菌丝体生长量和产生多糖物质量的效果最好。     

CaCl2对月季切花保鲜效果的研究

研究用0.5%、1.0%、1.5%三个不同浓度的CaCl2溶液作为保鲜液,对月季切花进行瓶插试验.通过对外部形态进行观察和生理指标进行测定,结果表明:含1%的CaCl2溶液瓶插月季切花可以增强花枝的吸水能力,增加花枝的鲜重,保持切花的水分平衡;降低膜脂过氧化水平,维持膜结构的相对稳定性,从而使切花的瓶插寿命比对照延长2～3 d.但高浓度的CaCl2(即1.5?Cl2)可以加速月季切花衰老.     

随机变量离散程度的另一个数字特征——绝对差的探讨

通过对随机变量的研究，讨论绝对差的概念及其性质．     

职中生"问题行为"的透视与转化

职中生“问题行为”的发生是一种较为常见的现象，如何准确地透视职中生“问题行为”的表现及其成因，探讨相应的转化方法以及促进学生自身行为转变的规律，是职业中学教育工作值得研究的一个课题，同时也是职业中学教书育人工作的切实体现。     

一类有向欧拉图的优美性

研究了有向欧拉图，证明了，优美的必要条件，并且证明了和的优美性．     

以学科知识为内容的研究性学习案例设计

介绍了一则以学科知识为内容、以趣味实验为依托的研究性学习案例．该案例的实施有助于提高学生的学习兴趣，拓展学生的知识视野．     

试论师生课堂教学交往

课堂教学需要师生之间的交往，师生教学交往的效果影响着课堂教学质量的提高，在当前的课堂教学中，师生教学交往存在着许多不足之处，本文作者从四个方面对师生课堂教学交往的优化进行了讨论，试图以此来激发课堂教学的活力，提高课堂教学的质量。     

Conventional or sustainable? Chinese university students’ thinking about feedback used in their English lessons

Feedback has been increasingly conceptualised as a dialogical process where students interpret the provided information through interaction with comment providers and use it to enhance their learning. A major challenge for the development of sustainable feedback is closely related to how students think about it. This study explored how 25 Chinese university students made sense of instructor and peer feedback following their English group presentations. The findings reveal that most of the participants perceived more judging and encouraging functions of feedback than its improving functions, which reflected their conventional thinking about feedback. Variation also existed in the perceived functions of instructor and peer feedback. Imbalanced power relations, face, group harmony and instructors’ feedback practice as well as students’ past learning and assessment experiences appeared to inhibit the participants from viewing feedback in a sustainable way. This study sheds light on college students’ complex thinking about feedback in a non-Anglophone context which has been neglected in the feedback literature, and has implications for educators and researchers in facilitating sustainable feedback in the Chinese context and the non-Chinese contexts where Chinese students study.