This article introduced a novel nanocomposite(NC) hydrogel with clay as cross-linking agent, including structural characteristics, preparation methods, mechanical properties, self-healing properties, high transparency and swelling properties.

Traditional teaching of chemistry of daily chemicals was reformed by adjusting the course contents, modifying the teaching methods and changing the evaluation methods. The learning initiative and enthusiasm of students were mobilized, their abilities of knowledge understanding and applying were strengthened and their creative thinking was also cultivated, and the interaction between teachers and students were promoted.

Combined with careful teaching process design, the dialectical unity relationships lying in chemical knowledges, such as chemical reaction, chemical equilibrium, crystal structures, crystal properties and so on, were dissected and identified by some typical cases to develop students' dialectical thinking ability. The practice showed that the concept "while teaching just only for imparting knowledge" should be changed, the connotation of college chemistry knowledge system could be dug deep to seek out the relationship between chemistry and philosophy. It was an effective way to develop students' dialectical thinking ability, help them set up materialistic world view, achieve innovative ability and truly realize the goals of high education.

This article discussed how to coordinate and harmonize the teaching process of inorganic chemistry and physical chemistry according to their contents and characteristics and our experiences of teaching. The teaching of the inorganic chemistry should be mainly based on the interconnection of knowledge and applications of chemistry, whereas that of the physical chemistry mainly based on the excavation and elevation of each knowledge point. This harmonization improved the utilization efficiency of class time, and promoted the cultivation of self-learning and scientific thinking ability of students.

This article proposed a new approach to solve the changes of Gibbs free energy, enthalpy and entropy in chemical reaction based on number axis. The signs of ΔH, T₁ΔS, T₂ΔS (positive or negative) could be judged by marking their values or relative positions on number axis directly, so that the spontaneity of reaction could also be confirmed. This method is easier to be understood and grasped by the students because it is much intuitional, convenient and efficient.

This article expounded the meaning, development, characteristics, pattern of flipped classroom and teaching cases of flipped classroom at home and abroad; discussed the teaching reform of chemistry didactics including teaching contents, teaching structure, roles of teachers and students, teaching evaluation and technological platform based on flipped classroom; analyzed implementation of chemistry didactics based on flipped classroom with an example of teaching design of "presenting a teaching plan".

Nanoscience is an interdisciplinary science integrating physics, chemistry and other basic subjects.This paper used a homemade experimental device combining ultrasonic atomization and magnetic field inducement to synthesize shape-controlled nanoparticle film of ferroferric oxide. This device can be used in open comprehensive experiment teaching to promote the reform of experiment teaching of physics and chemistry.

According to the characteristics of inorganic and analytical chemistry experiment in science and engineering universities, combined with the experimental conditions of our basic chemistry experiment center,this article performed a series of reforms including designing experiments reasonably, reducing reagent consumptions, replacing toxic reagents and recycling materials, which could realize green chemical experiments, decrease waste residue, waste liquid and waste gas, reduce experimental costs, achieve good environmental and economic benefits. At the same time, green chemistry education for students could be effectively carried out.

This article discussed the reform of experiment teaching for applied chemistry specialty and students' research ability training. Results showed that changing teaching ideas, selecting experimental contents carefully, adopting independent learning, introducing teachers' scientific research and building comprehensive experiment platform could effectively improve students' innovative ability and scientific research ability.

This paper used double wavelength ultraviolet spectrophotometry to eliminate the interference of salicylic acid to the determination of effective duration of aspirin by accelerated experiment. The results showed that the difference of absorbance value between the wavelength of 275 nm and 316 nm could reflect the accurate concentration of aspirin without interference of salicylic acid, and the operation was simple.

Based on the ideas of green chemistry, the synthesis of benzocaine, one of traditional organic chemistry experiments, was improved in this article. The ionic liquid ethyl pyridine hydrogen sulfate was synthesized and used as the esterification catalyst instead of concentrated sulfuric acid. The effects of acid/alcohol ratio, amount of ionic liquid, reaction time and catalyst reuse on esterification were discussed. The process of after-treatment was simplied by the usage of Pd-C/HCOONH₄ in the reducing atmosphere rather than iron-acid system, and also the amount of Pd-C on the reduction reaction was analyzed.

Based on pedagogical content knowledge(PCK), by three-dimensional core curriculum group, practical teaching system of five stages including observation,noviciate,learning,training and practicum, and introduction of professional qualification standards of teacher, pre-service teachers can apply existing chemistry expertise, skills and educational knowledge to chemistry education in middle school and research work, and their educational practice ability can be enhanced by establishing observable, measurable, exercisable growing up files. This is an innovative mode of educational practice ability training of pre-service teachers based on teacher certification.

According to the characteristics of medicinal chemistry, this article discussed about how to carry out flipped classroom, including preparing teaching videos, organizing class, tutoring after class and teaching evaluation. The combination of MOOCs and flipped classroom aroused students' initiative and enthusiasm of learning, and let students be the main body in classroom,which was helpful for medicinal chemistry teaching and pharmacy talent training suitable for large pharmacy.

In view of the problems existing in basic chemical experiment teaching in agricultural universities,this article established a new research-oriented teaching mode to cultivate students' independent learning ability and innovative ability. Through optimizing teaching contents, reforming the teaching methods, and improving learning interests of students, a multilevel experiment teaching system including basic experiments, comprehensive experiments, research experiments and innovative experiments was formed. This teaching mode is significant for improving students' learning efficiency and cultivating students' learning and innovative ability.

Specific measures of teaching reform of chemical reaction engineering were introduced. Combing classroom teaching with 3D virtual simulation, seminar, project teaching and practical training of chemical engineering, the students' engineering practical abilities were cultivated.

Based on the characteristics of bilingual courses and the deficiency of traditional classroom teaching, the bilingual course system of advanced organic chemistry for postgraduates has been reformed and converted to a combination of classroom teaching, discussion in english, flipped classroom, independent learning and exercises, homework and exams. Combined with the teaching practice, the new course system focuses on training students' ability of independent learning, inquiry learning and research learning. The whole course aims at the mastery and application of the basic theories and methods in advanced organic chemistry. Meanwhile, a digital, informational and international teaching environment was created, in order to achieve the purpose of training the talents with international view, solid basic knowledge, comprehensive ability and innovative literacy.

This article introduced systematically experiment teaching design of computer software in comprehensive experiment of analytical chemistry with example of Excel from aspects of design rule, experiment content and teaching method,which will be helpful to improve students' ability of data analysis and beneficial for the exploration of analytical chemistry experiment teaching.

According to the investigation, many students are not familiar with the information processing theory, they do not understand that the basis of chemical knowledge is language knowledge, convention, rule and experiment, and do not know why chemistry is a natural science subject using fuzzy language most. Teachers of chemistry education should guide students to understand characteristics of chemistry based on students' existing knowledge, infiltrate learning strategies according to characteristics of chemistry knowledge, integrate traditional teaching mode and modern educational technology and improve students' ability of using learning strategies flexibly and scientifically.

To elaborate the aromaticity of polycyclic aromatic hydrocarbons (PAHs), this article constructed a simple mathematic model to deduce their general formula as C_4R+2-IH_2R+4-I. Extrapolation of this formula can explain well why every PAH compound follows the (4n+2) Hückel rule while the n equals (R-I/2). This formula provides a new scientific understanding to aromaticity from the reinterpretation of mathematics.

This article analyzed the experiment of reaction order determination of (NH₄)₂S₂O₈ and KI, and concluded that deterioration of (NH₄)₂S₂O₈ or KI could cause nonlinear relationship between reaction rate and concentration of reactants. Correct reaction order could not be got while deterioration was distinct. Firstly, partial deterioration of (NH₄)₂S₂O₈ or KI could cause nonlinear variation. The effective concentration method could be used to eliminate mathematically the interference of deterioration. In addition, correct reaction order could be obtained simply by removing the oxidative derivate from (NH₄)₂S₂O₈ via Na₂SO₃ or Na₂S₂O₃ in the experiment because the main deterioration is from (NH₄)₂S₂O₈. Secondly, excessive abuse or insufficiency of Na₂S₂O₃ could cause nonlinear variation also. Initial rate could be obtained from average rate adjusted by reaction process coefficient while Na₂S₂O₃ was excessive. Random error of the operation would be increased while Na₂S₂O₃ was insufficient. Only when the amount of Na₂S₂O₃ was moderate, a good linear relationship between reaction rate and concentration would be shown without any correction, for the average rate nearly equal to the initial rate. Above analysis is helpful for thoroughly understanding the primary principle of reaction order determination, and the mentioned correction methods are expected to provide more ideal experiment results.

Fu Ying is a famous physical chemist and chemical educator in China. This article introduced his patriotism, rigorous attitude of scholarship, teaching ideologies, noble morality,teaching methods such as paying attention to basic knowledge, chemical history and chemical experiments, and cultivating students' learning interests and innovative consciousnesses.