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2019 Volume 34 Issue 1
2019, 34(1): 1-6
doi: 10.3866/PKU.DXHX201811008
Abstract:
In living organisms, protein functions are constantly evolving over generations throughout the history. Through iterative rounds of genetic mutations and natural selection of fit phenotypes, protein functions have been gradually optimized. This proce...
In living organisms, protein functions are constantly evolving over generations throughout the history. Through iterative rounds of genetic mutations and natural selection of fit phenotypes, protein functions have been gradually optimized. This proce...
2019, 34(1): 7-13
doi: 10.3866/PKU.DXHX201804032
Abstract:
This paper introduces new practices in improving laboratory management system for teaching laboratory in universities. The novel practices are based on GB/T19001-2016 quality management system (QMS). The first principle as well as the term 9.1.2 and ...
This paper introduces new practices in improving laboratory management system for teaching laboratory in universities. The novel practices are based on GB/T19001-2016 quality management system (QMS). The first principle as well as the term 9.1.2 and ...
2019, 34(1): 14-17
doi: 10.3866/PKU.DXHX201805043
Abstract:
The construction of teaching resources is an important work in university teaching reform. Aiming at improving the quality of laboratory teaching and cultivating students' creative ability, the discussion on the teaching resources of organic chemistr...
The construction of teaching resources is an important work in university teaching reform. Aiming at improving the quality of laboratory teaching and cultivating students' creative ability, the discussion on the teaching resources of organic chemistr...
2019, 34(1): 18-23
doi: 10.3866/PKU.DXHX201805023
Abstract:
High quality laboratory teaching material is an important guarantee for undergraduate laboratory teaching and plays an important role in the cultivation of innovative talents. The article introduces the construction of comprehensive experimental teac...
High quality laboratory teaching material is an important guarantee for undergraduate laboratory teaching and plays an important role in the cultivation of innovative talents. The article introduces the construction of comprehensive experimental teac...
2019, 34(1): 24-32
doi: 10.3866/PKU.DXHX201804024
Abstract:
The manuscript starts from fundamental knowledge of amino acid metabolism, followed by the analysis of how and why we incorporate it into current biochemistry education. These metabolic processes containing different biochemical reaction mechanisms a...
The manuscript starts from fundamental knowledge of amino acid metabolism, followed by the analysis of how and why we incorporate it into current biochemistry education. These metabolic processes containing different biochemical reaction mechanisms a...
2019, 34(1): 33-38
doi: 10.3866/PKU.DXHX201805022
Abstract:
Low friction is the most outstanding feature of ice surface. The existence of liquid water on ice surface, which serves as lubricant, has been taken as the main cause for its low friction. Three main hypotheses for the formation of liquid water on ic...
Low friction is the most outstanding feature of ice surface. The existence of liquid water on ice surface, which serves as lubricant, has been taken as the main cause for its low friction. Three main hypotheses for the formation of liquid water on ic...
2019, 34(1): 39-47
doi: 10.3866/PKU.DXHX201805030
Abstract:
Carboranes exhibit three-dimensional aromaticity as well as stable physical and chemical properties due to their unique molecular cages, which not only enable the wide application in organoboron and organometallic chemistry, but also result in increa...
Carboranes exhibit three-dimensional aromaticity as well as stable physical and chemical properties due to their unique molecular cages, which not only enable the wide application in organoboron and organometallic chemistry, but also result in increa...
2019, 34(1): 48-53
doi: 10.3866/PKU.DXHX201805007
Abstract:
Tetraphenylethylene and its derivatives with propeller structure have excellent fluorescence properties, which can be applied to the fields of organic photo-electric materials, fluorescence sensing and biological imaging due to the aggregation-induce...
Tetraphenylethylene and its derivatives with propeller structure have excellent fluorescence properties, which can be applied to the fields of organic photo-electric materials, fluorescence sensing and biological imaging due to the aggregation-induce...
2019, 34(1): 54-57
doi: 10.3866/PKU.DXHX201806029
Abstract:
By using the light sensor of smartphone, a simple photometer was designed. Also, an Android APP was developed to show the online signal and calculate the absorbance automatically. This photometer uses a flow cell of HPLC UV-detector as sample absorpt...
By using the light sensor of smartphone, a simple photometer was designed. Also, an Android APP was developed to show the online signal and calculate the absorbance automatically. This photometer uses a flow cell of HPLC UV-detector as sample absorpt...
2019, 34(1): 58-63
doi: 10.3866/PKU.DXHX201806030
Abstract:
This paper designed a facile comprehensive experiment based on the frontier research topic of gold nanoparticles. The well-dispersed gold suspensions were synthesized by the reduction of chloroauric acid with sodium citrate and their size-dependent o...
This paper designed a facile comprehensive experiment based on the frontier research topic of gold nanoparticles. The well-dispersed gold suspensions were synthesized by the reduction of chloroauric acid with sodium citrate and their size-dependent o...
2019, 34(1): 64-71
doi: 10.3866/PKU.DXHX201806031
Abstract:
Advanced network technology can help form an effective closed loop for the management of hazardous wastes in universities, reduce the harm to chemistry from chemistry teaching and research activities, and roughly understand the teaching and research ...
Advanced network technology can help form an effective closed loop for the management of hazardous wastes in universities, reduce the harm to chemistry from chemistry teaching and research activities, and roughly understand the teaching and research ...
2019, 34(1): 72-76
doi: 10.3866/PKU.DXHX201804037
Abstract:
Hot pot is a famous traditional Chinese cuisine. During hot pot, people usually judge whether or not the meat is well done by observation. This way for making judgement lacks scientific support and may possibly cause safety risks. In this paper, we s...
Hot pot is a famous traditional Chinese cuisine. During hot pot, people usually judge whether or not the meat is well done by observation. This way for making judgement lacks scientific support and may possibly cause safety risks. In this paper, we s...
2019, 34(1): 77-81
doi: 10.3866/PKU.DXHX201804008
Abstract:
Two different kinds of expressions about freezing point depression were shown in current college chemistry textbooks, leading to the confusion of teachers and students in teaching and learning. Suggestions were put forward with graphic analysis and i...
Two different kinds of expressions about freezing point depression were shown in current college chemistry textbooks, leading to the confusion of teachers and students in teaching and learning. Suggestions were put forward with graphic analysis and i...
2019, 34(1): 82-88
doi: 10.3866/PKU.DXHX201806008
Abstract:
Proton nuclear magnetic resonance spectroscopy is one of the most commonly used spectral methods for the characterization of organic compounds. It provides proton information on chemical shifts, integral areas, and coupling splits of organic compound...
Proton nuclear magnetic resonance spectroscopy is one of the most commonly used spectral methods for the characterization of organic compounds. It provides proton information on chemical shifts, integral areas, and coupling splits of organic compound...
2019, 34(1): 89-91
doi: 10.3866/PKU.DXHX201806005
Abstract:
Extraction separation is a common operation in chemical experiments. According to the distribution law, the Lagrangian multiplier method is used to derive and prove that the extraction efficiency can be optimized only in the case of using same aliquo...
Extraction separation is a common operation in chemical experiments. According to the distribution law, the Lagrangian multiplier method is used to derive and prove that the extraction efficiency can be optimized only in the case of using same aliquo...
2019, 34(1): 92-97
doi: 10.3866/PKU.DXHX201804041
Abstract:
Colligative properties of dilute strong electrolyte solution, i.e., freezing point depression, boiling point elevation and osmotic pressure, are discussed. As an example, the freezing point depression equation of dilute strong electrolyte solution is...
Colligative properties of dilute strong electrolyte solution, i.e., freezing point depression, boiling point elevation and osmotic pressure, are discussed. As an example, the freezing point depression equation of dilute strong electrolyte solution is...
2019, 34(1): 98-103
doi: 10.3866/PKU.DXHX201803047
Abstract:
This paper proposes a method of using free software on mobile phones or tablets to remotely control and monitor laboratory equipment. The Ezviz Studio video software is used to monitor laboratory environment and the surrounding of equipment, which pr...
This paper proposes a method of using free software on mobile phones or tablets to remotely control and monitor laboratory equipment. The Ezviz Studio video software is used to monitor laboratory environment and the surrounding of equipment, which pr...
2019, 34(1): 104-107
doi: 10.3866/PKU.DXHX201803015
Abstract:
This paper discussed the differences between intermolecular interactions and van der Waals force. Based on the physical models of different interactions, some important and confusing concepts were clarified.
This paper discussed the differences between intermolecular interactions and van der Waals force. Based on the physical models of different interactions, some important and confusing concepts were clarified.
2019, 34(1): 108-115
doi: 10.3866/PKU.DXHX201805042
Abstract:
Currently,the interpretation of the location effect of electrophilic substitution reaction on benzene ring is mainly based on the qualitative explanation of the experiment. In this paper, we chose five typical mono-substituted benzene molecules (incl...
Currently,the interpretation of the location effect of electrophilic substitution reaction on benzene ring is mainly based on the qualitative explanation of the experiment. In this paper, we chose five typical mono-substituted benzene molecules (incl...
2019, 34(1): 116-121
doi: 10.3866/PKU.DXHX201805033
Abstract:
This paper introduces the skillful calculation formula and application scope of multi-equilibrium standard equilibrium constant. It is a simple, fast and accurate approach to solve problems. Moreover, it can also intuitively estimate the directionali...
This paper introduces the skillful calculation formula and application scope of multi-equilibrium standard equilibrium constant. It is a simple, fast and accurate approach to solve problems. Moreover, it can also intuitively estimate the directionali...
