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1.
出于对学生全面发展的考虑,高校(特别是化学专业)开设了综合设计性实验课程来锻炼学生的动手能力;化学信息学集合了现代化学、计算机、数学等领域的最新技术,对综合设计性实验起着重要作用。  相似文献   

2.
许海卫 《化学教学》2011,(11):12-13
从学情掌握、教材处理和教学情境诱导等方面,阐述了化学课堂生成性问题产生的原因,提出利用教学中出现的生成性问题来提高课堂教学活力和效率的几点对策。  相似文献   

3.
本文探讨了实验方法在化学学科中的重要地位和作用,列举了大量实例并结合本人参与科研工作的体会,运用辩证唯物主义的立场、观点和方法,分析、阐述了其内在规律性及特点。  相似文献   

4.
建筑材料与生活息息相关,其中蕴含着丰富的化学教学资源。结合课程标准,从建筑材料的物质组成、生产工艺、化学原理、可能危害四个方面,对相关素材进行了统整。在教学实践中,紧密联系建筑材料相关内容,可以完善学生认知的系统性、实现认知的进阶性、增进认知的辩证性,有利于核心素养的落实。  相似文献   

5.
本文结合相关数据.采用质性和量化评价相结合、总体概括和典型错例分析相统一的方式,对2010年高考理综化学Ⅱ卷试题进行了分析,并对高中化学教学提出了相应的建议.  相似文献   

6.
以人为本的化学综合实验改革与探索   总被引:1,自引:0,他引:1  
从以人为本教育理念的角度剖析了化学综合实验开设的目的和意义,强化其在实验课程改革的重要性,从综合性、创新性、实用性、衔接性、绿色性、认同性等6个方面深入探讨了改革实践中的经验。  相似文献   

7.
郭银 《中国教师》2010,(Z1):377-377
<正>在面向21世纪,体现时代特色的今天,中国的教育正发生着翻天覆地的变化。随着我国的改革开放基础教育也在不断的发展实施课程的改革构建一个开放的、充满生机的、有中国特色社会主义的基础教育课程体系、课程改革更加注重基础性、社会性、人文性和发展性。  相似文献   

8.
本文叙述了我在化学教学中,以多种类型的实验,注意培养学生思维的严密性、广阔性、深刻性、创造性和敏捷性,从而说明了实验教学在化学教学过程中的作用和地位。  相似文献   

9.
微生物絮凝剂的开发与应用   总被引:1,自引:0,他引:1  
本综述了微生物絮凝剂的发展,对絮凝性微生物产生絮凝性的有关机理进行了讨论,并介绍了微生物絮凝剂的特性用途。  相似文献   

10.
医学化学实验教学改革   总被引:3,自引:0,他引:3  
医学院校化学实验的现行教学内容及课程体系不能满足培养高素质能力医学人才的需要。针对现状,该校进行了一系列的化学实验课程改革探索,提出了如下建议:①优化实验内容、更新教学手段;②增设综合性、设计性实验;③应用微型化、仿真性实验。  相似文献   

11.
A novel reversible photochromic nanocomposite film based on a hybrid inorganic-organic matrix in which heteropolyacid H4SiW12O40 (SiWA) was entrapped in Si-O-Ti network was prepared. Structure, photochromic behaviors and mechanism of the film were investigated by means of infrared spectroscopy (IR), ultraviolet-visible (UV-Vis) absorption spectra and electron spin resonance (ESR). The results showed that heteropolyanion i.e. SiW12O^4- 40 (SiW12), maintained a Keggin structure in the film and there was a strong interaction between anion SiW12 and cation R-NH^+3 (R=link of hybrid composite). The photochromic properties of the composite film originated from reversible charge transfer between the anions and cations. Under UV irradiation, the anion would be reduced via one-electron step with simultaneous oxidation of the cation, accompanied by a color change from colorless to blue. Bleaching could occur when the film was in contact with ambient air or 02 in the dark.  相似文献   

12.
A series of photochromic diarylethene derivatives containing different fluorophores was synthesized by the Sonogashira coupling reaction and characterized by ^1H nuclear magnetic resonance (NMR), ^13C NMR and mass spectroscopy. Photochromic conversion of Cz-MS was observed and its structural change was confirmed by proton NMR, Switchable absorption and emission phenomena were observed for these molecules. These phenomena were attributed to the reversible photochromic fluorescence resonance energy transfer (pcFRET) process. The design of this novel photochromic system of Py-4MS enables information to be processed in a non-destructive manner. This overcomes the problem of the destructive nature of tracking photochromism using ultraviolet (UV)-vis spectroscopy.  相似文献   

13.
介绍了光致变色液晶化合物的分类及光致变色液晶高分子在信息存储领域的应用.综述了光致变色液晶小分子化合物研究进展及其应用前景.总结了光致变色液晶材料光调控的方式.  相似文献   

14.
本文介绍了光致变色现象的发现及发展,说明了光致变色现象的原理,综述了光致变色反应的类型及光致变色材料的应用。  相似文献   

15.
发现了具有逆光致变色性质的螺吡喃类化合物的结构特点,即在吲哚啉氮上连有极性基团,同时和吡喃环并连的芳环上具有强的吸电子基团.设计并合成了逆光致变色化合物1’-(2-羟乙基)-3’,3’-二甲基-6-硝基螺[吲哚啉-2,2’[2H-1]苯并吡喃].实验表明,用它配制成的逆光致变色油墨显示有很好的色度和耐疲劳度.  相似文献   

16.
Peer review is a significant component in scientific research. Introducing peer review into inquiry processes may be regarded as an aim to develop student understanding regarding quality in inquiries. This study examines student understanding in inquiry peer reviews among pre-university chemistry students, aged 16–17, when they enact a design of a mimicked scholarly peer review. This design is based on a model of a human activity system. Twenty-five different schools in Brazil, Germany, Poland and The Netherlands participated. The students (n?=?880) conducted in small groups (n?=?428) open inquiries on fermentation. All groups prepared an inquiry report for peer review. These reports were published on a website. Groups were randomly paired in an internet symposium, where they posted review comments to their peers. These responses were qualitatively analyzed on small groups’ level of understanding regarding seven categories: inquiry question, hypothesis, management of control variables, accurate measurement, presenting results, reliability of results, discussion and conclusion. The mimicked scholarly review prompted a collective practice. Student understanding was significantly well on presenting results, discussion and conclusion, and significantly less on inquiry question and reliability of results. An enacted design, based on a model of a human activity system, created student understanding of quality in inquiries as well as an insight in a peer-reviewing practice. To what extent this model can be applied in a broader context of design research in science education needs further study.  相似文献   

17.
在氮气保护下,制备了3种二芳基乙烯化合物1o、2o 和3o,通过核磁共振进行结构表征,运用紫外-可见吸收光谱对其光致变色性能进行研究。在紫外光照射下,3种化合物在可见光区均出现了特征的关环吸收峰,最大吸收波长分别为440、511和605nm,溶液的颜色分别由无色变为黄色、红色和蓝色,到达光稳态时间分别为150、160和600s。到达光稳态的溶液在可见光照射下,发生开环反应,溶液颜色由有色恢复到无色。实验结果表明,乙烯环与二芳基不同位点的连接影响着二芳基乙烯分子的π-π共轭性,从而影响化合物的光致变色性能。  相似文献   

18.
在乙腈─乙醇─水(2:2:1,V/V/V)的混合溶剂中制备了六种金属(锰、钴、镍、铜、锌、镉)苦味酸盐与4′─硝基苯并─15─冠─5的固态配合物,其组成为M(pic)2·2L·XH2(M=Mn、CU,x=2;M=Co,Ni,Zn,Cd,x=4;pic=苦味酸根;L=4′─NO2B15CS),并通过元素分析、红外光谱、紫外光谱和摩尔电导对该系列配合物进行了表征。  相似文献   

19.
在水溶剂中,使用微波合成苯氧乙酸,反应仅需2-4分钟,收率达84.2%。  相似文献   

20.
本文合成了8种金属(锰、钴、镍、铜、锌、镉、汞、铅)苦味酸配合物,并通过元素分析、红外光谱、紫外光谱和摩尔电导对该系列配合物进行了表征。  相似文献   

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