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  • Dealing with Experimental Data of Combustion Heat by Origin's Direct Drawing Renolds' Temperature Correction
  • WEI Fengyuan
  • In this paper, an Origin mapping method is introduced, which can directly draw the Renolds temperature correction chart in the combustion heat measurement experiment for further data process. Compared with manual drawing, Origin has the advantages of high accuracy, simplicity and rapidity. Compared with the computer multisegment linear fitting method, Origin not only has the same high accuracy, but also is more intuitive, reflecting the original intention of Renolds mapping method better, and can directly observe the heat leakage of combustion heat experiment. Origin’s method of directly drawing Renolds temperature correction diagram has the advantages of both manual drawing and computer linear fitting, and it is worth popularizing.
  • DOI:10.3866/PKU.DXHX201812027
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  • Exploration and Practice on Construction of Molecular Simulation Experiment Course
  • ZHANG Heng, MA Ying, LIU Gang, ZHANG Dongju, SONG Qisheng, YUAN Shiling
  • We put forward the idea of building a molecular simulation experiment course. After two-year teaching practice, we wrote the experiment textbook which not only covers the classic experimental projects, but also includes the frontier hot issues, and open exploration experiment. This article summarizes the teaching requirements, basic content, assessment methods, the initial achievements made so far and the prospects for the future.
  • DOI:10.3866/PKU.DXHX201901035
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  • Inorganic Chemistry Teaching for Vocational Secondary-Undergraduate Students
  • Zuxin ZHOU, Guangping CHANG, Yifeng ZHOU, Aimin WANG, Shahua HUANG
  • There are large differences between secondary vocational school and senior high school. Lacking systematic and intensive training on the basic knowledge for the vocational secondary-undergraduate students, their theoretical thinking needs to be improved; however, they are strong in imaginal thinking due to the training in real work practices. Therefore, inquiry teaching method was adopted in inorganic chemistry course to help the students to "discover" some concepts and to better understand definitions and integrate principles to solve real problems. This course designed according to the characteristics of secondary vocational school is more benefitial to application-oriented vocational secondary-undergraduate students.

  • 2019, Vol.34 No.3 DOI:10.3866/PKU.DXHX201807032
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  • Research on Formative Assessment of Physical Chemistry Learning
  • Yashao CHEN, Xiuxiu MIAO, Changhao WANG, Ying ZHANG, Tingwen LUO
  • In this paper, based on the blackboard teaching platform with comprehensive utilization of the online and offline teaching resources, the formative assessment of teaching system has been constructed for physical chemistry course. In the teaching process, we have conducted practical exploration and evaluated students with comprehensive evaluation which included independent learning, summative improvement and effectiveness evaluation. This formative assessment method covering the complete teaching process played a positive role in promoting students' effective learning.

  • 2019, Vol.34 No.3 DOI:10.3866/PKU.DXHX201808022
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2019 Vol. 34,No. 3Published:09 March 2019
Study and Reform of Chemical Education
  • Inorganic Chemistry Teaching for Vocational Secondary-Undergraduate Students
  • Zuxin ZHOU, Guangping CHANG, Yifeng ZHOU, Aimin WANG, Shahua HUANG
  • There are large differences between secondary vocational school and senior high school. Lacking systematic and intensive training on the basic knowledge for the vocational secondary-undergraduate students, their theoretical thinking needs to be improved; however, they are strong in imaginal thinking due to the training in real work practices. Therefore, inquiry teaching method was adopted in inorganic chemistry course to help the students to "discover" some concepts and to better understand definitions and integrate principles to solve real problems. This course designed according to the characteristics of secondary vocational school is more benefitial to application-oriented vocational secondary-undergraduate students.

  • 2019, 34 (3): 1-4 DOI: 10.3866/PKU.DXHX201807032
  • Research on Formative Assessment of Physical Chemistry Learning
  • Yashao CHEN, Xiuxiu MIAO, Changhao WANG, Ying ZHANG, Tingwen LUO
  • In this paper, based on the blackboard teaching platform with comprehensive utilization of the online and offline teaching resources, the formative assessment of teaching system has been constructed for physical chemistry course. In the teaching process, we have conducted practical exploration and evaluated students with comprehensive evaluation which included independent learning, summative improvement and effectiveness evaluation. This formative assessment method covering the complete teaching process played a positive role in promoting students' effective learning.

  • 2019, 34 (3): 5-10 DOI: 10.3866/PKU.DXHX201808022
  • Design and Optimization of the Undergraduate Cheminformatics Course
  • Honglin ZHAI,Xiaoyun ZHANG,Xiaojun YAO,Shuyan LI,Xueqing JIA,Jingjing CAO
  • In this paper, the basic implications and characteristics of the cheminformatics course are first analyzed. Combined with the teaching reform and practice of related courses in our college, we propose that the teaching of the cheminformatics course should be divided into two levels. The design and optimization of the cheminformatics course for undergraduates are discussed emphatically, which is only expected to stimulate the further work of the teaching reform of cheminformatics course.

  • 2019, 34 (3): 11-15 DOI: 10.3866/PKU.DXHX201807028
  • Efforts on the Application of "Integration Theory with Practice" in Analytical Chemistry Teaching
  • Aifeng LI,Wenli JIA,Lei WANG,Jingwen LIU
  • "Integration theory with practice" is a basic principle that must be upheld in teaching. In analytical chemistry teaching, the teaching contents should be organized rationally according to professional characteristics of the students. The teaching contents should also be connected with daily life, production practice, news events, and discipline development. This is beneficial to stimulate the students' interest in learning, and strengthen the practicability and the sense of current and historical of teaching contents. It is also helpful for the students to grasp the fundamental knowledge and the basic theories of analytical chemistry. Furthermore, students' ability to analyze and solve problems can be improved, and their scientific literacy and innovation capability can be fostered.

  • 2019, 34 (3): 16-22 DOI: 10.3866/PKU.DXHX201808010
Survey of Chemistry
  • Discussion on the Chemical Principles of Amino Acid Metabolism Based on Three Non-Polar Amino Acids
  • Xinyu MA,Zhipeng A. WANG,Jie TIAN,Zhenxiong JIANG,Yunzi GOU,Huijuan YAN,Bing XU
  • Considering the diversity and relative independence of amino acid metabolic pathways, the introduction and expansion of contents related to undergraduate education are important to foster a new generation of promising interdisciplinary researchers of the 21st century. This manuscript applies three non-polar natural amino acids, Val, Ile, and Leu, as examples to the exploring of a novel teaching example for lecturing the contents and methods of amino acid metabolism. The manuscript also attempts to generalize and summarize the reasons and logics behind the choices that nature makes for these metabolic pathways. Meanwhile, the biochemical processes involved reflects some unusual metabolic pathways and chemical reaction principles in life science. These pieces of knowledge are not only attractive and inspiring materials for undergraduate education, but also an effective way to illustrate current research frontiers. This manuscript is looking forward to helping students in their further studies and researches.

  • 2019, 34 (3): 23-31 DOI: 10.3866/PKU.DXHX201805046
Chemistry Laboratory
  • Exploration on the Docking Mode between Laboratory Teaching and Skill Contests for Adult Students
  • Yuan LI,Jinhai LOU,Yu XU,Zhengping JI,Lubin NI,Guowang DIAO
  • Taking analytical chemistry laboratory teaching as an example, basic operating training in daily teaching was reinforced based on the recruitment structure and studying habits of adult students, in order to improve their analysis and detection abilities. The aim of experimental skills contest of chemical-analysis-engineer is to promote transformation of teachers' teaching forms and improve adult students' self-inquiry learning ability. A novel "docking mode" between laboratory teaching and skill contests has been developed, which has enhanced students' employment competitiveness and improved influence as well as recognition of our school.

  • 2019, 34 (3): 32-35 DOI: 10.3866/PKU.DXHX201807030
  • Comparison of Two Colorimetric Methods for the Determination of Trace Ammonia in Water
  • Jiamin WANG,Han LI,Wenkai ZHANG,Chengshang LIU,Baoliang LIU,Huayu SUN,Qikun ZHANG
  • The level of ammonia nitrogen source is one indicator of eutrophication of lakes and reservoirs. Currently, indigo phenol blue spectrophotometry and Nash reagent spectrophotometry have been adopted to detect the NH3-N content in national standard of the People's Republic of China. To cultivate college students' innovative practice, scientific research consciousness and experimental hands-on ability, the ammonia nitrogen concentration in the water samples of three famous springs (Baotu Spring, Heihu spring, Wulong pool), Daming Lake, Dongchang Lake and Haihe river was tested. Taking the drinking water from Shandong Normal University for comparison, the differences between the two methods were studied. More importantly, the students learned from the success and failure in the testing process that they used the colorimetric method to detect and analyze samples. The correlation coefficients of the standard curves of the two methods reached up to 0.9999 through continuous improvement of the detection scheme. In the experimental operation, different experimental results have been obtained due to the variation of operation and manipulation (such as the concentration of chromogenic agent, the operation skill of the standard solution and the length of the time after the mixing of each solvent etc.). This paper analyzes the causes of the outlier in the experimental results, and discusses the difference of two detection methods.

  • 2019, 34 (3): 36-41 DOI: 10.3866/PKU.DXHX201807034
  • Improvement and Exploration of Experimental Setup for Extraction of Caffeine from Tea
  • Yunying WU,Jianxin XIE,Xianxue WU,Wenjing CHEN,Gaozhang GOU
  • The extraction experiment of caffeine from tea was a classic experiment in Organic Chemistry Laboratory. In this paper, the original Soxhlet extractor device used in the experiment was modified and obtained the internal ventilation Soxhlet extractor, which was used in laboratory teaching. The extraction effects of the improved Soxhlet extractor and the original Soxhlet extractor were compared by the control experiment. The results showed that the improved device keeps the function and characteristics of the original devicewith the shorter the extraction time, higher extraction temperature and the extraction rate. Thus, it may provide an alternative for college organic laboratory teaching.

  • 2019, 34 (3): 42-46 DOI: 10.3866/PKU.DXHX201807053
  • Synthesis and Properties of a Novel Electrofluorochromic Polymer: A Proposed Comprehensive Chemical Experiment
  • Mingjuan ZHOU,Danming CHAO
  • This chemical comprehensive experiment is recommended for the synthesis and characterization of a novel electrofluorochromic polymer. It includes the synthesis of a novel crosslinked electrofluorochromic polymer, and the measurement of the electrofluorochromic performance. With the practice of this experiment, students can broaden their chemistry knowledge, improve their skill of comprehensive experimental operation and professional qualities. Moreover, students can have access to the frontier science and technology, which would greatly stimulate and cultivate their interest in innovative thinking and scientific research.

  • 2019, 34 (3): 47-52 DOI: 10.3866/PKU.DXHX201807055
Self Studies
  • Screening, Processing and Checking of BET Test Data
  • Jianhui ZHANG,Xiaojuan CHEN,Xiaolan YU,Weiqing ZHANG
  • The classic BET test is applicable to mesoporous and nonporous materials, and the relative pressure (p/p0) range is 0.05-0.3. Currently, BET is also used to characterize the substances containing microspores. The relative pressure range is 0.005-0.3. The large amount data need to be screened to find out the data that conform to the BET model. Some of the latest software provided by the instrumental company have very convenient auxiliary screening function, which is written based on Rouquerol transform method. We tried to find out the mathematical deduction process of this method. Then, according to the literature and the testing experience by many individuals, we summed up the 5 steps of BET data processing. The entire process can be realized on the Origin software. It is suitable for the data screening, processing and checking of all volumetric BET methods.

  • 2019, 34 (3): 53-59 DOI: 10.3866/PKU.DXHX201807015
  • Teaching Strategy of Phase Equilibrium Theory in Physical Chemistry Course
  • Xianliang FU
  • The teaching of phase equilibrium theory in the physical chemistry course encounters some problems, such as the varieties of the phase systems and the knowledge points and the difficulty to understand the abstractive phase diagrams. To solve these problems, a systematic teaching strategy is proposed in this paper. The basic concepts and the laws in phase equilibrium theory are first introduced, and the key points are emphasized. The knowledge points in the chapter were then summarized in a table, including the phase diagram systems, the phase laws, the application of the diagrams, and the involved items. Finally, the general methods for the understanding of phase diagrams were proposed. Some examples were further given to explain how the methods, the phase law, and the lever rule were used in solving some specific problems.

  • 2019, 34 (3): 60-67 DOI: 10.3866/PKU.DXHX201808021
Future Chemist
  • Application of Arrow-Pushing in the Disproportionation of Halogen Oxoanions
  • Tianyi YANG,Qing ZENG,Gan WANG,Yidan MIAO
  • The article uses the disproportionation of chlorate and hypobromite as examples to analyze the application of arrow-pushing in the disproportionation of halogen oxoanions. Based on the experimental results, we have discussed the rationality of each possible mechanism we proposed based on electronic structure methods. All these efforts are put to demonstrate the way to introduce basic organic-style arrow-pushing into inorganic field.

  • 2019, 34 (3): 68-76 DOI: 10.3866/PKU.DXHX201807013
Chemical Olympiad Competition
  • Teaching Design of Inorganic Chemistry Experiment Based on Chemistry Experiment Tournament of Undergraduates
  • Ling YE, Weihai SUN, Hailiang ZHANG, Yinyun LÜ, Zhiqiang DONG, Chunyan ZHANG, Xiaoqing OUYANG, Chanzi RUAN
  • The general information of inorganic chemistry experiment examination for the 2nd chemistry experiment tournament of Fujian undergraduates were introduced. The problems found in the competition were illustrated. Furthermore, based on the test and the existing problems, flipped classroom was used and new teaching modes were designed amply in order to facilitate effective interaction between teaching and learning, and improve laboratory teaching.

  • 2019, 34 (3): 77-83 DOI: 10.3866/PKU.DXHX201808030
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