Login In
2016 Volume 31 Issue 2
2016, 31(2): 1-5
doi: 10.3866/PKU.DXHX20160201
Abstract:
Marine biofouling is a globally unsolved problem in marine industries and activities.It is urgent to develop environmentally friendly anti-biofouling systems.In this paper, we review the recent progress in the development of environmentally friendly marine anti-biofouling systems and discuss the future directions.
Marine biofouling is a globally unsolved problem in marine industries and activities.It is urgent to develop environmentally friendly anti-biofouling systems.In this paper, we review the recent progress in the development of environmentally friendly marine anti-biofouling systems and discuss the future directions.
2016, 31(2): 6-10
doi: 10.3866/PKU.DXHX20160206
Abstract:
Aiming to practice the concept of failure tolerance in chemistry laboratory teaching, we encourage teachers to re-examine the values of experimental failures as opportunities for students' experimental ability training and curriculumstudy.At the same time, we have taken steps to create a friendly failure-tolerant environment and explore teaching and research resources from those experimental failures, including collecting and providing consultation on experimental faults, facilitating rerunning experiments, renewing and improving experimental projects, looking for scientific research opportunities in experimental failures, and establishing failure-friendly assessment methods.By exploring resources in experimental failures, teaching quality, research abilities, and social service levels of our chemistry experiment center have been promoted and improved.
Aiming to practice the concept of failure tolerance in chemistry laboratory teaching, we encourage teachers to re-examine the values of experimental failures as opportunities for students' experimental ability training and curriculumstudy.At the same time, we have taken steps to create a friendly failure-tolerant environment and explore teaching and research resources from those experimental failures, including collecting and providing consultation on experimental faults, facilitating rerunning experiments, renewing and improving experimental projects, looking for scientific research opportunities in experimental failures, and establishing failure-friendly assessment methods.By exploring resources in experimental failures, teaching quality, research abilities, and social service levels of our chemistry experiment center have been promoted and improved.
2016, 31(2): 11-14
doi: 10.3866/PKU.DXHX20160211
Abstract:
This article introduced several reform measures of Comprehensive Chemistry Laboratory at Xi'an Jiaotong University, including adapting experiments from the mature scientific research project, training to use the advanced instruments, as well as improving teaching and examination methods.
This article introduced several reform measures of Comprehensive Chemistry Laboratory at Xi'an Jiaotong University, including adapting experiments from the mature scientific research project, training to use the advanced instruments, as well as improving teaching and examination methods.
2016, 31(2): 15-19
doi: 10.3866/PKU.DXHX20160215
Abstract:
By comparing the new high school curriculum PEP compulsory 2 and elective 5 with the content of organic chemical properties in University Organic Chemistry, we aimed at exploring the way to align high school and college curricula on chemistry education, and providing guidance for teaching organic chemistry in high school and university with the new curriculum.
By comparing the new high school curriculum PEP compulsory 2 and elective 5 with the content of organic chemical properties in University Organic Chemistry, we aimed at exploring the way to align high school and college curricula on chemistry education, and providing guidance for teaching organic chemistry in high school and university with the new curriculum.
2016, 31(2): 20-23
doi: 10.3866/PKU.DXHX20160220
Abstract:
The safety education plays an important role in laboratory teaching.Many domestic universities have the safety education courses in various forms in the curriculum.But written lecture notes are the most adopted way of teaching, thus is not attractive enough to the students to achieve a good teaching result.Combined with the characteristics of chemical safety education, we integrated the current physical chemistry experiment into a typical experiment for safety education to improve the safety awareness and ability of students.This safety education experiment would be expected to achieve multiple teaching goals.
The safety education plays an important role in laboratory teaching.Many domestic universities have the safety education courses in various forms in the curriculum.But written lecture notes are the most adopted way of teaching, thus is not attractive enough to the students to achieve a good teaching result.Combined with the characteristics of chemical safety education, we integrated the current physical chemistry experiment into a typical experiment for safety education to improve the safety awareness and ability of students.This safety education experiment would be expected to achieve multiple teaching goals.
2016, 31(2): 24-28
doi: 10.3866/PKU.DXHX20160224
Abstract:
Using the moving boundary method to measure the ion transference number is a basic physical chemistry experiment.To circumvent the shortcomings of chromium electrode in the traditional design, copper electrode was adopted.Comparing with the chromium electrode, replicate measurements showed that copper electrode presented good accuracy with the advantages of lowering the toxicity of electrode materials and the apparatus requirements.
Using the moving boundary method to measure the ion transference number is a basic physical chemistry experiment.To circumvent the shortcomings of chromium electrode in the traditional design, copper electrode was adopted.Comparing with the chromium electrode, replicate measurements showed that copper electrode presented good accuracy with the advantages of lowering the toxicity of electrode materials and the apparatus requirements.
2016, 31(2): 29-33
doi: 10.3866/PKU.DXHX20160229
Abstract:
The Ringbom equation for the titration curve of diprotic weak acid by monoprotic base was developed based on the proton balance equation, the mass balance equation, the side reaction coefficient, and the conditional stability constant.The calculation formulas for the first(pHsp1) and the second(pHsp2) stoichiometric point were deduced subsequently.
The Ringbom equation for the titration curve of diprotic weak acid by monoprotic base was developed based on the proton balance equation, the mass balance equation, the side reaction coefficient, and the conditional stability constant.The calculation formulas for the first(pHsp1) and the second(pHsp2) stoichiometric point were deduced subsequently.
2016, 31(2): 34-37
doi: 10.3866/PKU.DXHX20160234
Abstract:
There exist logical problems in the explanation of the second law of thermodynamics in some physical chemistry textbooks.It was shown that these explanations contradicted the law of identity, the law of non-contradiction and the law of sufficient reason in logic.The origin of the Carnot cycle and the efficiency of a Carnot engine were introduced from the historical view.
There exist logical problems in the explanation of the second law of thermodynamics in some physical chemistry textbooks.It was shown that these explanations contradicted the law of identity, the law of non-contradiction and the law of sufficient reason in logic.The origin of the Carnot cycle and the efficiency of a Carnot engine were introduced from the historical view.
2016, 31(2): 38-45
doi: 10.3866/PKU.DXHX20160238
Abstract:
Based on the Gaussian DFT calculations and analysis on hypervalent molecules, we concluded that the theory that outer valence d orbitals undergo hybridization and get involved in the formation of the d-p π bond is not reasonable.We proposed an explanation that can interpret experimental facts.Additionally, we described the relationship between the d orbital and the d function, which are not equal in computational chemistry.
Based on the Gaussian DFT calculations and analysis on hypervalent molecules, we concluded that the theory that outer valence d orbitals undergo hybridization and get involved in the formation of the d-p π bond is not reasonable.We proposed an explanation that can interpret experimental facts.Additionally, we described the relationship between the d orbital and the d function, which are not equal in computational chemistry.
2016, 31(2): 46-68
doi: 10.3866/PKU.DXHX20160246
Abstract:
The problems in the theory test of 29th Chinese Chemical Olympiad(Finals) were resolved. The problem-solving techniques and calculations were developed, and the background and bibliography involved were provided.
The problems in the theory test of 29th Chinese Chemical Olympiad(Finals) were resolved. The problem-solving techniques and calculations were developed, and the background and bibliography involved were provided.
2016, 31(2): 69-72
doi: 10.3866/PKU.DXHX20160269
Abstract:
