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1.
让化学史走进计算化学课堂   总被引:2,自引:0,他引:2  
阐述了化学史在计算化学课程教学中所起到的积极作用,介绍了利用计算化学史培养学生的科学思维、科学精神、科学态度等科学素养的具体措施以及计算化学史在培养学生的民族情感和科学情感等情感教育方面所起到的作用,并对教学实践的实施效果进行了评价调查。  相似文献   

2.
对化学教学方法分类的认识   总被引:1,自引:0,他引:1  
为了达到中学化学教学大纲规定的目的:使学生学习掌握基础知识、基本技能;激发学习化学的兴趣,培养学生的科学态度、学习方法。学习能力和创新精神以及关心自然、关心社会的情感;同时进行辩证唯物主义和爱国主义等教育。教师在通读教材、钻研教材、了解学生实际情况的基础上,从化学学科的特征出发,确定合适的工作方式,并引导学生也采取科学的学习方法和研究方法来学习化学这一门与众不同的学科,提高全体学生的化学素质,培养化学人才,是我们教师肩负的一项重要任务。中学化学教学过程是一种认识过程,是由传授知识到运用知识的发展…  相似文献   

3.
“师生并进”实验教学法探究程龙吟(安徽徽州师范专科学校245021)为学生创设最佳的学习情境,重视情感陶冶;为学生提供动手、动脑、动口的机会和条件,促使学生理解学习过程,生动活泼地主动学习,是研究化学教学模式,改革化学教学的方法论原理“’。高师无机实...  相似文献   

4.
新课程必修课教学挖掘教材潜在价值的研究   总被引:1,自引:0,他引:1  
曲雪梅  刘成坤 《化学教育》2006,27(10):13-15,19
高中新课程必修教材(山东科技版)为帮助学生加深理解知识、重视知识形成过程、发挥课后习题能力训练等功能,以及重视情感教育提供了丰富多彩的素材。教学时师生要善于挖掘这些素材的潜在价值。  相似文献   

5.
任红艳  桑晓 《化学教育》2019,40(20):59-63
论证教学是当前国际科学教育教学的热点领域。论文采用准实验设计,使用混合研究方法,在“化学教学论实验”课程中对学生进行了为期一学期的教学实践过程。实验组开展论证式教学的实践活动,并采用GR编码方式细致地分析学生科学论证活动的过程。研究结果表明,论证教学可以显著提高化学师范生的科学论证能力,并提高化学实验课程的学习兴趣。  相似文献   

6.
高等师范院校“化学史”教学的探讨   总被引:1,自引:1,他引:0  
濮江 《化学教育》2010,31(6):53-54
"化学史"是高等师范院校为化学(教育)专业学生开设的一门专业选修课,但长期以来对于该门课程的教学研究不够重视。经过近几年的教学实践,在"化学史"教学过程中采用分段教学与过程评价,即参与型教学、学生试讲、学生论文及学生过程评价,取得了较好的教学效果。  相似文献   

7.
化学情感领域的目标管理教学实践与研究   总被引:1,自引:1,他引:0  
化学情感领域的目标管理教学实践与研究王勇(湖北随州市实验中学试验研究组441300)教育是一复杂的动态系统,涉及多种因素,本文拟从实际出发,通过初中化学情感领域的目标管理教学试验,探索深化学科改革的新途径,以期达到提高基础教育质量的目的。一、概况当今...  相似文献   

8.
初中化学概念形成与教学策略   总被引:1,自引:0,他引:1  
孟献华 《化学教育》2004,25(2):36-37,44
化学基本概念的学习往往成为初中学生成绩的分化点,在教学中帮助学生克服这一学习障碍,体现新谏程所强调的过程、方法、情感等的教学理念是亟待解决的课题,本文通过对概念结构以及概念形成的细化分析,探讨了概念教学中培养学生掌握与应用概念的能力以及降低概念理解难度的途径。  相似文献   

9.
以微课视频为载体,对大一材料专业无机化学课程教学进行翻转课堂实验研究,通过试卷考试成绩和Likert 5级量表问卷得分对实施效果进行评价。发现经过36学时的无机化学授课后,实验班学生成绩提高比对照班更高,具有显著性差异,且呈现不及格率更低的情况。实验班学生在知识与技能,过程与方法,态度、情感与价值观3个维度下的多数指标问卷得分均显著高于对照班学生。表明该实验尝试提高了学生学习效果,优化了学生学习过程,改善了学生学习态度,提升了学生的能力。对上述结果进行了详细分析并对翻转课堂进一步应用于高校无机化学教学提出了建议。  相似文献   

10.
化学教学中的美育初探   总被引:1,自引:1,他引:0  
美育又叫审美教育、美感教育,它是培养学生具有正确的审美观和感受美、鉴赏美、创造美的能力的教育。美育也是社会主义精神文明建设的一个重要内容。美育过程,主要是形象思维活动和情感活动的过程,它对丰富学生  相似文献   

11.
国内光催化研究进展简述   总被引:4,自引:0,他引:4  
郑云  潘志明  王心晨 《催化学报》2013,34(3):524-535
分1975~1985, 1985~1995和1995~2012三个时期简要介绍了国内光催化研究进展, 主要侧重于光催化材料及其改性、应用和反应机理方面的研究进展, 并指出了当前光催化领域存在的一些重要问题和未来的发展趋势, 涉及到光解水、CO2还原、环境净化和选择性有机合成等方面.  相似文献   

12.
青蒿素研究进展   总被引:20,自引:0,他引:20  
青蒿素是目前治疗疟疾的特效药。本文对自青蒿素发现以来的最新研究进展进行了比较详尽的综述。内容包括: 青蒿素的发现及历史, 青蒿素的来源, 青蒿素的全合成,青蒿素的生物合成, 青蒿素衍生物以及植物组织培养生产青蒿素。  相似文献   

13.
The toxicity of inorganic trivalent arsenic for living organisms is reduced by in vivo methylation of the element. In man, this biotransformation leads to the synthesis of monomethylarsonic (MMA) and dimethylarsinic (DMA) acids, which are efficiently eliminated in urine along with the unchanged form (Asi). In order to document the methylation process in humans, the kinetics of Asi, MMA and DMA elimination were studied in volunteers given a single dose of one of these three arsenicals or repeated doses of Asi. The arsenic methylation efficiency was also assessed in subjects acutely intoxicated with arsenic trioxide (As2O3) and in patients with liver diseases. Several observations in humans can be explained by the properties of the enzymic systems involved in the methylation process which we have characterized in vitro and in vivo in rats as follows: (1) production of Asi metabolites is catalyzed by an enzymic system whose activity is highest in liver cytosol; (2) different enzymic activities, using the same methyl group donor (S-adenosylmethionine), lead to the production of mono- and di-methylated derivatives which are excreted in urine as MMA and DMA; (3) dimethylating activity is highly sensitive to inhibition by excess of inorganic arsenic; (4) reduced glutathione concentration in liver moderates the arsenic methylation process through several mechanisms, e.g. stimulation of the first methylation reaction leading to MMA, facilitation of Asi uptake by hepatocytes, stimulation of the biliary excretion of the element, reduction of pentavalent forms before methylation, and protection of a reducing environment in the cells necessary to maintain the activity of the enzymic systems.  相似文献   

14.
15.
Neutron activation analysis (NAA) is a very sensitive and accurate multielement analytical method that is widely applied to the investigation of environmental and archaeological problems. The first part of this paper is a review of pollution studies of toxic trace elements in sediments, seawater and marine organisms of Saronikos Gulf, Greece by NAA. The second part of this paper is a review of provenance studies based on minor and trace element research in ancient ceramics, obsidian, flint, limestone, marble and lead by Instrumental NAA, performed at the NCSR Demokritos.  相似文献   

16.
Contento NM  Branagan SP  Bohn PW 《Lab on a chip》2011,11(21):3634-3641
In situ generation of reactive species within confined geometries, such as nanopores or nanochannels is of significant interest in overcoming mass transport limitations in chemical reactivity. Solvent electrolysis is a simple process that can readily be coupled to nanochannels for the electrochemical generation of reactive species, such as H(2). Here the production of hydrogen-rich liquid volumes within nanofluidic structures, without bubble nucleation or nanochannel occlusion, is explored both experimentally and by modeling. Devices comprised of multiple horizontal nanochannels intersecting planar working and quasi-reference electrodes were constructed and used to study the effects of confinement and reduced working volume on the electrochemical reduction of H(2)O to H(2) and OH(-). H(2) production in the nanochannel-embedded electrode reactor output was monitored by fluorescence emission of fluorescein, which exhibits a pH-dependent emission intensity. Initially, the fluorescein solution was buffered to pH 6.0 prior to stepping the potential cathodic of E(0)' for the generation of OH(-) and H(2). Because the electrochemical products are obtained in a 2:1 stoichiometry, local measurements of pH during and after the cathodic potential steps can be converted into H(2) production rates. Independent experimental estimates of the local H(2) concentration were then obtained from the spatiotemporal fluorescence behavior and current measurements, and these were compared with finite element simulations accounting for electrolysis and subsequent convection and diffusion within the confined geometry. Local dissolved H(2) concentrations were correlated to partial pressures through Henry's Law and values as large as 8.3 atm were obtained at the most negative potential steps. The downstream availability of electrolytically produced H(2) in nanochannels is evaluated in terms of its possible use as a downstream reducing reagent. The results obtained here indicate that H(2) can easily reach saturation concentrations at modest overpotentials.  相似文献   

17.
美国化学教育中的科学道德教育   总被引:1,自引:0,他引:1  
陈丽  陈学民 《大学化学》2003,18(4):62-64
介绍了近年来美国科学界维护科学道德的行动及美国某些大学化学系开设科学道德教育课程的情况  相似文献   

18.
Electrochemistry is one of the most advanced techniques for monitoring neurochemical activities in the living brain because electrochemical approaches bear the advantageous features of high spatial and temporal resolutions, which facilitate its tremendous potential in investigating the highly spatially heterogeneous brain system and the fast dynamics of neurochemical activities. On the other hand, since brain is the most complicated organ in the sense of its numerous kinds of neurochemical species, high selectivity is always required for any analytical methods that approach the brain. In this review, we will discuss various electrochemical methodologies to achieve selective detection of neurochemicals in mammalian brain and the strategies developed mainly by our group towards selective monitoring of both electrochemically active and inactive neurochemicals. At the end, we will discuss possible solutions towards brain mapping of neurochemical species and combination of neurochemical detection strategy with electrophysiology as the direction of future development of electroanalysis in living brain.  相似文献   

19.
钙是宏量元素,是人体中含量较高的元素之一,体内99%的钙构成骨骼和牙齿以及维持骨骼结构,1%的钙调节人体重要生理功能。钙的含量过高或过低都与许多疾病有关,只有保持一种平衡状态,才能使机体处于正常环境。  相似文献   

20.
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