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Chinese Journal of Chemical Education  
  Chinese Journal of Chemical Education--2015, 36 (4)   Published: 18 February 2015
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Research Advances of Enzyme Microreactors at the Inlet of Capillary Electrophoresis

XU Xiao-Ying, LIU Li-Hong, SHU Yang
Chinese Journal of Chemical Education. 2015, 36 (4): 1-5. ;  doi: 10.13884/j.1003-3807hxjy.2014090080
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The microreactor is an equipment letting physical, chemical or biochemical reaction occur in a small space. With advantages of less reagents consumption and samples pollution, and easy control of reaction conditions, microreactors are suitable for the analysis of enzymatic reaction and a lot of enzyme microreactors have been developed. Combining the microreactor and capillary electrophoresis, the reaction and separation could occur at the same capillary by using the inlet of the capillary as a microreactor. This article focuses on the research advances of enzyme microreactor at the capillary inlet in the past two years.

Exploration and Practice of Textbook Construction of Inorganic and Analytical Chemistry Experiment

LIU Bing, CHEN Hou, XU Qiang
Chinese Journal of Chemical Education. 2015, 36 (4): 6-9. ;  doi: 10.13884/j.1003-3807hxjy.2014040150
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Based on the concept of integration, a new system of teaching contents and writing guide lines of inorganic and analytical chemistry experiment textbook were constructed taking the role of experiment in chemical research as the clue, which broke the boundaries of inorganic chemistry and analytical chemistry,and paid more attention to the establishment of students' experimental ideas and the improvement of students' experimental attainments.

Extension of Teaching Contents of Element Abiochemistry

CHEN Ya-Guang
Chinese Journal of Chemical Education. 2015, 36 (4): 10-14. ;  doi: 10.13884/j.1003-3807hxjy.2013060073
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A new teaching method of element abiochemistry based on practical application of compounds was suggested, in which examples taken from industry fields or daily life were introduced including operating principles and effects on humans' life due to different properties of the compounds.It was helpful for freshmen to understand the utility and significance of chemistry in the improvement of human life better.

Experiment Design and Teaching of Claisen-Schmidt Condensation Reaction

MA Qing-Lin, HAN Bin, MENG Fan-Jun, BAI Ming
Chinese Journal of Chemical Education. 2015, 36 (4): 15-18. ;  doi: 10.13884/j.1003-3807hxjy.2014060079
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Three experiments of Claisen-Schmidt condensation reaction of benzaldehyde with ketones such as acetone, 3-pentanone and cyclohexanone respectively were designed. Electronic effect and steric hindrance of ketones in Claisen-Schmidt condensation reaction were discussed deeply and important knowledge points in organic chemistry textbook were reviewed through further comparative analysis of experimental results to assist teaching of organic chemistry.

Research on Two-dimensional Evaluation System of Open Teaching of Comprehensive Chemistry Experiment

HUANG Meng-Meng, TANG Jian, LI Fang, FANG Ping, SHEN Yong-Miao
Chinese Journal of Chemical Education. 2015, 36 (4): 19-21. ;  doi: 10.13884/j.1003-3807hxjy.2014050019
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An open system of comprehensive chemistry experiment was established, and evaluation system for the experimental system was also studied. The evaluation system involved evaluations from theory teachers, experiment teachers, team leaders of students and students themselves through the whole experiment processes. Then the two-dimensional evaluation result was formed of all evaluations adjusted by weight coefficients through website.

Introducing Methods in Analytical Chemistry Experiment Teaching

ZHANG Huan, LI Gang, ZHANG Jing, LI Su-Jun
Chinese Journal of Chemical Education. 2015, 36 (4): 22-25. ;  doi: 10.13884/j.1003-3807hxjy.2014060006
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Some introducing methods in analytical chemistry experiment teaching are introduced,such as presentation of related theories and experiments,emphasis of core contents,review on experiment reports,setting questions and so on. These methods have many advantages including effectively highlighting the teaching emphasis, breaking through the teaching difficulties, making teachers change into guiders from lecturers, making students become the main body of experiment courses and improving the teaching quality comprehensively.

Research and Practice of PBL Method in Organic Chemistry Experiment Teaching

JIANG Wei-Hua, LI Zhong-Yu
Chinese Journal of Chemical Education. 2015, 36 (4): 26-29. ;  doi: 10.13884/j.1003-3807hxjy.2014060075
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The teaching method based on problem-based learning (PBL) was applied in the research of organic chemistry experiment teaching with the synthesis of n-butyl benzoate as an example. The results showed that PBL teaching method could significantly enhance students' learning interest, develop their comprehensive experimental ability, and improve the teaching quality of organic chemistry experiment.

Determination of the Concentration of Formaldehyde in Embalming Fluid for Specimens using Back Titration

ZHANG Ai-Jv, DAI Xing-De, ZHANG Xiao-Lin
Chinese Journal of Chemical Education. 2015, 36 (4): 30-31. ;  doi: 10.13884/j.1003-3807hxjy.2014050136
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Determination of the concentration of formaldehyde in embalming fluid for specimens by back titration was proposed and the recovery rate and interference test were completed with sodium thiosulfate as the standard solution. The results showed that the method was simple, rapid, practical and had higher credibility, the average recovery rate exceeded 98%, three times coexisting substance did not have any interference.

Cooperative-operating Mode of Practice Bases for Chemistry Education

WU Mao-Jiang
Chinese Journal of Chemical Education. 2015, 36 (4): 32-36. ;  doi: 10.13884/j.1003-3807hxjy.2014040151
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The traditional educational practice for college students confined to a short-period training was limited in time and activities,and did not suit the cultivation of middle school teachers under the new curriculum concept. Therefore, based on the curriculum reform and teaching practice, this article put forward the cooperative-operating mode of educational practice bases for students major in chemistry, in which the education practice was normalized, the pre-service training was standardized, the activities in the practice bases were systematized, the educational resources could be shared and the summing-up of the practice was sustained. Through this cooperative-operating mode, research level and coaching ability of teachers in both sides were enhanced, and trainees also gained comprehensive development and promotion in teaching.

Discussion on Information Processing Mode in Chemistry Teaching in Health Schools

MO Xiao-Wei
Chinese Journal of Chemical Education. 2015, 36 (4): 37-42. ;  doi: 10.13884/j.1003-3807hxjy.2014040105
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Combined with the structure of study process proposed by Gagne based on theory of information processing, basic conditions for information transmission of chemistry teaching, factors effecting information transmission and reception, transcoding of information by teachers and students, storage and use of information in teaching, and information feedback and control in teaching were analyzed. Then an information processing mode of chemistry teaching was concluded, including steps such as the source of information(textbook, teaching supplies,etc.); encoding(acquisition and formation of memory of knowledge); information channel (diffusion ways of knowledge); decoding(learning and reconstruction of cognition); receiving information(construction of cognition). Teachers should instruct students to connect and organize the codes of chemistry information logically to obtain scientific knowledge,and optimize the implementation of chemistry teaching process.

Curriculum Reform of Organic Chemistry Experiment based on Practical Ability Training in Higher Vocational Education

QIN Yong-Hua, ZHANG Ya-Juan, ZHANG Bin, ZHANG Xin-Bo
Chinese Journal of Chemical Education. 2015, 36 (4): 43-46. ;  doi: 10.13884/j.1003-3807hxjy.2014040187
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According to the teaching situation, this article explored the curriculum reform of organic chemistry experiment based on practical ability training in higher vocational colleges,analyzed the composition of post ability, construction of experiment project, organization and implementation of teaching and test evaluation system, discussed the textbook compilation and teachers in the processes of teaching.

Study on Teaching Mode Led by Practice and Innovation in Natural Medicine Chemistry

YANG Xi-Liang, HU Xia-Min, ZHANG Yong-Zhong, LIU Juan
Chinese Journal of Chemical Education. 2015, 36 (4): 47-50. ;  doi: 10.13884/j.1003-3807hxjy.2014070100
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Based on the teaching practice, this study aims to build a novel teaching mode of natural medicine chemistry from both the theoretical and practical explorations. The multi-module practical teaching system of natural medicine chemistry has been actively promoted in many ways, including the construction of innovative experiment course platform, the reform of teaching mode and methods, the participation of humanistic and the application of modern educational technology, to cultivate innovative pharmacy talents in traditional Chinese medicine.

Teaching Reform and Practical Effect Analysis of Oilfield Chemistry Course for Petroleum Engineering Major

LIU Jian-Xin, FU Mei-Long
Chinese Journal of Chemical Education. 2015, 36 (4): 51-54. ;  doi: 10.13884/j.1003-3807hxjy.2014090127
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The teaching situation of oilfield chemistry course for petroleum engineering major has been analyzed, chemical basis and study initiatives of students, teaching methods and the evaluation mode were considered as the main factors for cultivating students' abilities. So we reformed teaching methods of fundamental theory, focused on capacity training in the whole teaching procedure, and incorporated the scores of class discussions and analysis abilities of students into the total score of the examination. Investigation results showed that the reform could promote the initiative and analysis capacity of students and evaluate leaning achievements of students accurately. System planning of the course and strengthening the combination of theory and experiment teaching are required to enhance the learning achievements of students.

Research on the Reform of Sanitary Chemistry Teaching in Medical Colleges and Universities in the View of Constructivism

WANG Man-Man, HAO Yu-Lan, WANG Xue-Sheng, XU Hou-Jun
Chinese Journal of Chemical Education. 2015, 36 (4): 55-58. ;  doi: 10.13884/j.1003-3807hxjy.2013120056
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The traditional theory-oriented teaching method emphasizing on book-knowledge and ingoring practical abilities can not meet the needs of modern teaching. A preliminary research on the teaching reform of sanitary chemistry course in medical colleges and universities was established in the view of constructivism. Constructivism theory proposes that context, collaboration, negotiation and meaning construction are the four major elements in a learning environment and students are the centre of the class. Teaching process and methods were reformed by scaffolding instruction, anchored instruction and the creation of a supportive and diverse learning atmosphere. Meanwhile, a new comprehensive evaluation system was established accordingly. In this way, the traditional theory-oriented classroom will be successfully transformed into a practice-oriented one, and the quality-oriented teaching objective will be achieved finally.

Applications of MathCAD Software in Inorganic and Analytical Chemistry Teaching

ZHANG Wei, MA Li, CHEN Hong-Jin, XIE Shao-Ai, HAN Li
Chinese Journal of Chemical Education. 2015, 36 (4): 59-63. ;  doi: 10.13884/j.1003-3807hxjy.2014050145
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By the MathCAD software, we graphed the radial distribution functions for atomic orbitals of hydrogen atom and calculated the node points position in inorganic and analytical chemistry. A general program with its built-in language was compiled to accurately calculate pH values of several types of acid-base system, which were in accordance with experimental results. Based on the work, students could understand the related theory visually and deeply with the quantitative point of view.

Investigation of Satisfaction Degree about Pre-service Chemistry Teachers' Classroom Teaching Skills

QU Yu-Ping, ZHANG Yu-Qiang
Chinese Journal of Chemical Education. 2015, 36 (4): 64-67. ;  doi: 10.13884/j.1003-3807hxjy.2014020089
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Educational practice is a necessary experience of pre-service teachers in normal university, and classroom teaching skills are important supporting conditions of pre-service teachers' educational practice. Shortcomings of teaching skills of pre-service chemistry teachers (junior students) based on the investigation mainly include that the mode of teaching activities and the using of media are single; the language of instruction lacks artistry and infectivity; the class-ending is not natural and fluent; blackboard writing is short of artistry, clarity and aesthetics; and teaching demonstration is unattractive and unimaginative. In view of these shortcomings, corresponding suggestions are put forward to strengthen the training in preparation stage for educational practice to promote pre-service chemistry teachers' classroom teaching skills.

Discussion on Problems about Purification of Crude Salt

LIU Zhi-Hong, YU Yan-Yan
Chinese Journal of Chemical Education. 2015, 36 (4): 68-70. ;  doi: 10.13884/j.1003-3807hxjy.2014060007
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In order to cultivate students' creative thinking and experimental ability, several questions about purification of crude salt were discussed. Can both separation and purification get rid of impurities? Why is there a slight explosion when frying crude salt? Must the salt solution be boiled when removing impurities like SO42-, Ca2+ by method of precipitation? What range should the pH of the solution be kept so that excessive Na2CO3 can be removed?

Logic Analysis and Set-theoretic Expressions of Problems of Expressions in College Chemistry(Ⅱ)

YIN Guo-Guang, QU Bo, XU Jin-Quan
Chinese Journal of Chemical Education. 2015, 36 (4): 71-75. ;  doi: 10.13884/j.1003-3807hxjy.2014050116
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In this article, the scientificity, rogourism and potential academic problems of expression in college chemistry were used as examples to guide the students to query, find, analyze and solve these problems. At the same time, the new methods of logicality and set theory were used to analyze and characterize the chemical expression in-depth in order to inspire, train, and improve the spirit of suspicion and innovation of the students effectively. It's a primary attempt for theorizing and mathematizing the expression of college chemistry.

Research on Popularization of Chemistry Knowledge in Science Garden Column of Yan'an Liberation Daily

LIU Gong-Yuan, LIU Hui-Min
Chinese Journal of Chemical Education. 2015, 36 (4): 76-80. ;  doi: 10.13884/j.1003-3807hxjy.2014040192
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Relevant information about the popularization of chemistry knowledge in science garden column of Yan'an Liberation Daily during Anti-Japanese War was introduced. Publicity purpose, publicity strategy and scientific articles of the science garden column were analyzed in order to get some beneficial enlightenment.
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