The key factors of positron emission computed tomography (PET) are the positron radionuclide labelled radiopharmaceuticals, the development and clinical translation of which are the core techniques of PET molecular imaging diagnostic techniques. The theory, safety, synthesis, labelling, clinical application and the characteristics were briefly introduced in this paper. Our purpose is to popularize the knowledge of positron radionuclide labelled radiopharmaceuticals. It is useful for students to broaden chemical horizon and promote scientific literacy.

This paper described the status of course "Chemistry and Human Being" as a new education mode of humanistic literacy in chemical education, characterized by teaching, participation, innovation and practical application. This new teaching mode has achieved preliminary successes.

When teaching the chapter of coordination compound, the teacher could help students to have a better understanding of the valence bond theory and the equilibrium of coordination-dissociation reaction by reviewing the knowledge of structure of substance and chemical equilibrium learned in the previous chapters. Meanwhile, the teacher could conclude the central knowledge in college chemistry. Through the above procedures, students could gain new insight through reviewing knowledge learned before and achieve a comprehensive understanding of college chemistry.

In this paper, the simple and unified formula of number average degree of polymerization (X_n) and the extent of systemic reaction(p_s) X_n=1/(1-p_s) as well as the unified formula of the extent of systemic reaction and the extent of group reaction(p_a)p_s=2rp_a/(1+r)were derived from the definition of degree of polymerization and the extent of systemic reaction,which deepened the understanding of the extent of reaction and the relationship of number average degree of polymerization and the extent of reaction.

Applied electrochemistry is a course with intensive theories and wide applications. This paper discussed the application of numerical simulation method in applied electrochemistry teaching based on the example of copper electroplating. By computer numerical simulation, electrochemical process was coupled with gravity field and flow field commonly used in electrochemical engineering, and the solution of domain was computed by means of finite element method. Multi-fields coupling software could combine abstract equations with multi-media such as intuitive computer images and cartoons to help students to understand the electrochemical theory. Using computer experimental method to organize teaching was an effective way to improve classroom efficiency, stimulate learning interests of students, and develop their innovative spirits and practical abilities.

Reform of analytical chemistry was made in teaching ideas, teaching concepts, teaching methods and so on. It is helpful for students to master the basic theories, form scientific attitude and raise their practical ability in solving problems.

The synthesis of ethyl benzoate is an important content in organic chemistry experiment, the traditional judgment method to determine the end of reaction is to observe the phenomenon of water on the wall of reactor and the reaction time. However, the judgment can not accurately describe the extent of the reaction because it is qualitative rather than quantitative. In this paper, the internal standard method and external standard method of gas chromatography were utilized to monitor the reaction and determine the end of the reaction quantitatively. By using the modern scientific instruments, students can deeply understand the reaction principle, and develop a rigorous and serious scientific attitude, as well as improve their abilities of analyzing and solving problems.

Terephthalic acid was recycled from waster PET beverage bottles using ethylene glycol as the solvent and reactant. The recycled products were characterized by infrared spectroscopy and nuclear magnetic resonance spectroscopy. In this experiment, undergraduates acquired variable basic experimental skills such as heating reflux, vacuum distillation and vacuum filtration, and were familiar with analysis and characterization methods. Thus, students' concepts of green chemistry and environmental protection were formed during the experiment.

This article calculated the activation energy of chemical reaction by measuring the effects of reaction temperature and concentration of potassium iodide on reaction rate, and eliminated the influences of the reagents by means of formula derivation. Experimental data were fitted by Origin, therefore relationship among reaction rate, concentration, temperature and activation energy could be founded directly from the fitting curve. Different from the merely verification experiment, the revised experiment changed into independently designed comprehensive experiment.

This article designed a quantitative experiment of nitrogen dioxide dissolved in water. The experiment indicated that when the test tube filled fully with NO₂ was inverted in water, the liquid volume in the test tube would be much more than two-thirds of the tube volume while the liquid level in the test tube was basiclly stable after a few minutes, and the test tube would be filled fully with liquid if the experiment lasted long enough (14 h). Further study showed main possible reasons leading to these phenomena. First, it was related to the saturated vapor pressure of concentrated nitric acid when NO₂ was prepared. Secondly NO can dissolve in water and react with dissolved oxygen. In addition, that NO can dissolve in dilute nitric acid may be one of reasons. However, dimerization of NO₂ was irrelevant. That test tube could be filled with liquid may be closely related to the diffusion of oxygen in water.

The "three in one" instrumental analysis platform involving students' practices, teachers' scientific research and inspection works of enterprises was constructed based on existing instruments. According to the standard of quasi professionalization, this platform could meet demands of students' practices, teachers' scientific research and enterprise requirements, increase practice time of students and their employment opportunities, improve teachers' research conditions and alleviate their experimental pressure, provide testing services for local small enterprises and technical cooperation bridges between teachers and enterprises.

During the teaching of organic chemistry experiment, teaching effects and students' initiatives could be enhanced by the method of setting specific requirements for key points of the experiments such as clarifying the aim of studying, improving pre-lab work and classroom teaching, and paying attention to backtracking after class.

Based on the theory of pedagogical content knowing(PCKg), a five-month-long study of a pre-service teacher major in master of chemistry education was carried out. Through observation of teaching, related files, interviews of tutor and questionnaires, this article analyzed the construction and development of PCKg of the pre-service teacher in teaching practice, discussed the impacts of high school teaching-sites and teacher-training departments on the pre-service teachers' PCKg development, constructed a teaching practice mode of collaboration of high school and teacher-training college. The results could provide suggestions for the work of training pre-service chemistry teachers in the near future.

The reform of traditional teaching mode was caused by the appearance of MOOCs in higher vocational education. On the basis of characteristics and training objective of drug synthesis technology, the whole course was divided into base module and development module, meanwhile two principles including deep involvement of enterprises and learning analysis were adhered. Different teaching methods and teaching activities were chosen according to content characteristics of each module. At the same time, the standard of evaluation was improved.

This paper defined clearly the personnel cultivation mode from the position of higher vocational education. Considering social demands, requirements of enterprises and learning situation of freshmen, it introduced cultivation mode of three order based on cognitive process with example of industrial analysis and test specialty, which is suitable for all students and meet the social demands for high skilled personnel.

Combining with the characteristics of pharmacy and teaching experience, the author applied living examples to physical chemistry teaching for students major in pharmacy. The principles of physical chemistry were elucidated by analyzing living examples in medicine and pharmacy, in this way, physical chemistry was combined with specialized courses of pharmacy organically, and good teaching effects were achieved.

This article studied the teaching experiment of gas hydrates and designed the simulation device which realized the synthesis and decomposition of gas hydrates under different conditions. The simulation device can judge forming or decomposing of gas hydrates through multiple ways,and is easy to operate with good repeatability.

Based on action-oriented teaching theory and vocational capacity view, action-oriented teaching approach was applied in classroom teaching of water analytical chemistry course for students major in water supply and drainage,and vocational capacities of students were promoted. Meanwhile, conditions for action-oriented teaching in practice and the leading role of teachers were discussed.

The visual program for the particle energy level and wave function in 1, 2-dimensional infinite potential well was built based on LabVIEW. The versatile program can achieve the graphical quantum effects of particles, draw the wave function and probability density wave function, and obtain the exact solution of probability interval of wave function in real time. According to the Schrödinger equation of particle in potential box and its general solution, the visual program connected the theoretical knowledge with practical programming, realized the graphic wave function, and automatically completed the accurate calculation task. The program optimized the teaching method, strengthened the theory learning effects, and improved the quality of teaching. It also has many advantages such as friendly interface, easy control and free function expansion.

The investigation showed that many pre-service chemistry teachers lack understanding of humanistic spirit such as the humanistic spirit argues against attributing the human being to nature of life, humanistic education cannot give living skills basically and do not directly link to the need of social and economic developments, science needs art and art also needs science, society and lives influence the construction of students' humanistic quality and chemical history contains rich humanistic education resources. Training schools should improve the humanistic education of pre-service chemistry teachers.

This article discussed the pH approximate calculation and its application conditions with examples of the pH calculations of weak monoacid solution, weak monobasic solution, weak polyacid solution, weak polyacid base solution and acid salt solution.

This article focused on the rule of "4n light on" and its application to pericyclic reactions, electrocyclic reactions and migration reactions. "4n" refers to the number of π electrons in the reaction, "light" means the reaction condition and "on" refers to the symmetry-permission in pericyclic reaction and anticlockwise rotation in electrocyclic reaction. The rule can be used to conjecture the stereoselectivity of these reactions and provide crucial basis for prediction of complex and unknown reactions. Moreover, the rule is simple and easier to remember.