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Online since: October 2010
Authors: Ming Chen, Hans Wiedmann, Yan Fen Mao, Xiao Feng
To guarantee the quality of bachelor-level engineers on knowledge, know-how, engineering competence and soft skills, this education model integrated a useful operation conception from curriculum design, bilingualism, multi-disciplinary and application-oriented education, education structure, and other resources of teaching and combined them into a system.
Fig. 1: Structure of Sino-German College of Applied Sciences (CDHAW) and Automotive Engineering/Service (AES) From the requirements for automotive industry, this paper discusses a novel education model of AES which focus on application-oriented, multi-disciplinary, and intercultural education.
Table 2 AES multi-disciplinary courses a Courses Disciple Mechanical Drawing & CAS Mechanical Fundamental of Mechanical Design Mechanical/Mechatronics Chemistry & Engineering Material (focus on automotive material) Chemistry/Material Electrotechnology & Electrics Measurement Electrics Electronics Electronics Fundamental of Mechanical Design Mechanical/Mechatronics Theoretical Mechanics Mechanics Engineering Mechanics Mechanics/Engineering Engineering Thermodynamics Mechanics/ hermophysics Mechanics of Materials Mechanics/Material Hydromechanics Hydromechanics Regional economy development & analysis Economy Electronics business Business Enterprise & Quality Management Management Information Technology & Logistics Informatics/Logistics Automatic Control Theory Control a Courses of automotive engineering and service are not included due to space constraints.
· However the organizational structure and the applied educational methods are steadily under observation and evaluation and have still to be adjusted slightly to reach the maximum benefit.
Fig. 1: Structure of Sino-German College of Applied Sciences (CDHAW) and Automotive Engineering/Service (AES) From the requirements for automotive industry, this paper discusses a novel education model of AES which focus on application-oriented, multi-disciplinary, and intercultural education.
Table 2 AES multi-disciplinary courses a Courses Disciple Mechanical Drawing & CAS Mechanical Fundamental of Mechanical Design Mechanical/Mechatronics Chemistry & Engineering Material (focus on automotive material) Chemistry/Material Electrotechnology & Electrics Measurement Electrics Electronics Electronics Fundamental of Mechanical Design Mechanical/Mechatronics Theoretical Mechanics Mechanics Engineering Mechanics Mechanics/Engineering Engineering Thermodynamics Mechanics/ hermophysics Mechanics of Materials Mechanics/Material Hydromechanics Hydromechanics Regional economy development & analysis Economy Electronics business Business Enterprise & Quality Management Management Information Technology & Logistics Informatics/Logistics Automatic Control Theory Control a Courses of automotive engineering and service are not included due to space constraints.
· However the organizational structure and the applied educational methods are steadily under observation and evaluation and have still to be adjusted slightly to reach the maximum benefit.
Online since: March 2024
Authors: Giuseppina Iacono, Giulio Malucelli, Giuseppe Rosace, Valentina Trovato
In this paper, the sol-gel technique was used to design hybrid phosphorus-doped silica structures for improving the thermal stability and flame retardancy of cotton fabrics.
The chemical structure of developed coatings was first studied on glass slides and then on cotton surfaces.
The chemical structure of untreated and treated cotton fabrics was investigated by Fourier Transform Infrared spectroscopy (FTIR) using a Thermo Avatar 370 spectrophotometer equipped with an attenuated total reflection (ATR) accessory and a diamond crystal.
Gamble, Cotton Fiber chemistry and technology (first ed.).
Horrocks, Flame retardant challenges for textiles and fibres: New chemistry versus innovatory solutions.
The chemical structure of developed coatings was first studied on glass slides and then on cotton surfaces.
The chemical structure of untreated and treated cotton fabrics was investigated by Fourier Transform Infrared spectroscopy (FTIR) using a Thermo Avatar 370 spectrophotometer equipped with an attenuated total reflection (ATR) accessory and a diamond crystal.
Gamble, Cotton Fiber chemistry and technology (first ed.).
Horrocks, Flame retardant challenges for textiles and fibres: New chemistry versus innovatory solutions.
Online since: October 2011
Authors: Gui Zhen Guo, You Yi Sun, Bin Hua Yang, Ya Qing Liu
Effects of different poly(vinyl alcohol)/Starch compositions on the porous structures of the porous polymer membranes were further investigated in detail.
The conductive PANI layer with honeycomb ordered structure was successfully formed .The resultant PANI/PC composite film with the ordered porous structure and electrically conductive surface had higher thermal stability than PANI itself.
Presently , the most widespread use processes are phase inversion method , immersion precipitation process and thermally induced phase separation (TIPS) process [5,6].However, there are many factors influencing porous structure, which makes these processes difficult in controlling membrane structure.
The decrease in contact angles was also attributed to increase in high surface roughness of film due to the formation of micro-pore structure [10].
Materials Chemistry and Physics. 114 (2009) 948-955
The conductive PANI layer with honeycomb ordered structure was successfully formed .The resultant PANI/PC composite film with the ordered porous structure and electrically conductive surface had higher thermal stability than PANI itself.
Presently , the most widespread use processes are phase inversion method , immersion precipitation process and thermally induced phase separation (TIPS) process [5,6].However, there are many factors influencing porous structure, which makes these processes difficult in controlling membrane structure.
The decrease in contact angles was also attributed to increase in high surface roughness of film due to the formation of micro-pore structure [10].
Materials Chemistry and Physics. 114 (2009) 948-955
Online since: August 2019
Authors: Olga V. Meteleva, M. Surikova, L. Bondarenko
Polyamide film (М8) has the smoothest surface structure.
In this case material structure splitting takes place even when materials don’t have dense structure of fibres (Figure 3a, 3c).
In that case the destruction took place not in the seam structure, but in the nonwoven material structure.
Mishilova. – М.: Chemistry, 1988. – 192 p
Multifunctional nanomaterials // Chemistry progress. – 2009. – № 3 (78). – P. 284-301
In this case material structure splitting takes place even when materials don’t have dense structure of fibres (Figure 3a, 3c).
In that case the destruction took place not in the seam structure, but in the nonwoven material structure.
Mishilova. – М.: Chemistry, 1988. – 192 p
Multifunctional nanomaterials // Chemistry progress. – 2009. – № 3 (78). – P. 284-301
Online since: August 2024
Authors: Amel D. Hussein, Subhi A. Al-Bayaty, Raheem A.H. Al-Uqaily
Al-Uqaily3,c
1College of Dentistry, Wasit University, Iraq
2,3Department of Chemistry, College of Science, Wasit University, Iraq
aadashar@uowasit.edu.iq, bsalbayaty@uowasit.edu.iq, crazeez@uowasit.edu.iq
Keywords: Black powder, TGA, Coats-Redfern, DTG, gas pipelines.
A study of the characteristic crystalline structure of black powder the XRD-6000 SHIMADZU X-RAY DIFFRACTOMETER, Japan was employed.
The positive values of enthalpy and internal energy emphasize that the reaction is non-spontaneously occurring; the negative magnitude of entropy refers to the activated complex formed during thermal decomposition being better organized by its structure compared with the initial structure of the black powder.
Schwertmann, The iron oxides: structure, properties, reactions, occurrences, and uses.
Egyptian Journal of Chemistry, 2021. 64(2): p. 893-901.
A study of the characteristic crystalline structure of black powder the XRD-6000 SHIMADZU X-RAY DIFFRACTOMETER, Japan was employed.
The positive values of enthalpy and internal energy emphasize that the reaction is non-spontaneously occurring; the negative magnitude of entropy refers to the activated complex formed during thermal decomposition being better organized by its structure compared with the initial structure of the black powder.
Schwertmann, The iron oxides: structure, properties, reactions, occurrences, and uses.
Egyptian Journal of Chemistry, 2021. 64(2): p. 893-901.
Online since: October 2014
Authors: Jin Zhang, Pu Gong, Ming Fu Li, Jian Cheng Han, Wen Wei Lian, Ji Hua Du
The structure (stem leaf) of plants shall be able to be clearly recognized, and the structure damage and stick state are the mark of ensiling decaying; the bigger the viscosity is, the higher the degree of decaying will be. pH value (acidity) is an important index which determines whether the ensiling is successful; the silage with a pH value below 4.0 has excellent quality; the silage with a pH value of 4.1-4.3 has good quality; the silage with a pH value of 4.4-5.0 has common quality; the silage with a pH value above 5.0 has bad quality, etc.
Silage quality sensory evaluation standard Item Scoring standard Score Smell No butyrate stink, smell of aroma fruit or obvious fragrance of bread 14 Weak butyrate stink, strong sour, weak fragrance 10 Heavy smell of butyrate, or pungent burnt smell or funk 4 Strong butyrate stink or ammoniacal smell, or almost no sour 2 Structure Good keeping of structure of stem and leaf 4 Poor keeping of structure of leaf 2 Extremely poor keeping of structure of stem and leaf, or slight mould or slight contamination 1 Serious rot or contamination of stem and leaf 0 Color Similar to color of raw materials, with hazel after being dried 2 Slight discoloring, with faint yellow or brown 1 Serious discoloring, with deep green or yellow due to color fading, and strong funk 0 Project determination and method.
Change of sense in ensiling process of pineapple leaf residue 0 day 3 days 5days 7days 15days 25days 35days PH value 6.58 6.36 6.10 5.80 4.82 4.58 4.31 Color Green Green Green Green Yellowish green Yellowish green Yellowish green Texture Loose, with good structure Loose, with good structure Loose, with good structure Loose, with good structure Loose, with good structure Loose, with good structure Loose, with good structure Smell Fait scent Fait scent Fait scent Acid flavor Acid flavor Acid flavor Acid flavor After analysis on determination result (Table 3) of various nutritional ingredients of pineapple leaf residue with different-day ensiling and nutritional ingredients of pineapple leaf residue with 0-day ensiling (control group), it can be seen from the experimental result (Fig.1 and Fig.2): in ensiling process, the obvious change happens in the content of various nutritional ingredients, among which the moisture content obviously increases (P<0.05) and the dry matter content
When pH value decreases to 3.8, the growth of lactic acid bacteria is also restricted, and the biological chemistry process in silage will also stop.
[13]Hawke J C: Chemistry and biochemistry of herbage(Academic press, New York 1973)
Silage quality sensory evaluation standard Item Scoring standard Score Smell No butyrate stink, smell of aroma fruit or obvious fragrance of bread 14 Weak butyrate stink, strong sour, weak fragrance 10 Heavy smell of butyrate, or pungent burnt smell or funk 4 Strong butyrate stink or ammoniacal smell, or almost no sour 2 Structure Good keeping of structure of stem and leaf 4 Poor keeping of structure of leaf 2 Extremely poor keeping of structure of stem and leaf, or slight mould or slight contamination 1 Serious rot or contamination of stem and leaf 0 Color Similar to color of raw materials, with hazel after being dried 2 Slight discoloring, with faint yellow or brown 1 Serious discoloring, with deep green or yellow due to color fading, and strong funk 0 Project determination and method.
Change of sense in ensiling process of pineapple leaf residue 0 day 3 days 5days 7days 15days 25days 35days PH value 6.58 6.36 6.10 5.80 4.82 4.58 4.31 Color Green Green Green Green Yellowish green Yellowish green Yellowish green Texture Loose, with good structure Loose, with good structure Loose, with good structure Loose, with good structure Loose, with good structure Loose, with good structure Loose, with good structure Smell Fait scent Fait scent Fait scent Acid flavor Acid flavor Acid flavor Acid flavor After analysis on determination result (Table 3) of various nutritional ingredients of pineapple leaf residue with different-day ensiling and nutritional ingredients of pineapple leaf residue with 0-day ensiling (control group), it can be seen from the experimental result (Fig.1 and Fig.2): in ensiling process, the obvious change happens in the content of various nutritional ingredients, among which the moisture content obviously increases (P<0.05) and the dry matter content
When pH value decreases to 3.8, the growth of lactic acid bacteria is also restricted, and the biological chemistry process in silage will also stop.
[13]Hawke J C: Chemistry and biochemistry of herbage(Academic press, New York 1973)
Online since: December 2016
Authors: Ivo Kusák, Miroslav Lunak, Pavel Rovnaník, Maria Mikova
Influence of Carbon Admixtures to the Electrical Conductivity
of Slag Mortars
Ivo Kusak1,a, Miroslav Lunak1,b, Maria Mikova2,c and Pavel Rovnanik2,d
1Institute of Physics, Faculty of Civil Engineering, Brno University of Technology,
Veveří 95, 60200 Brno, Czech Republic
2Institute of Chemistry, Faculty of Civil Engineering, Brno University of Technology,
Veveří 95, 60200 Brno, Czech Republic
akusak.i@fce.vutbr.cz, blunak.m@fce.vutbr.cz, cmikovam@study.fce.vutbr.cz, drovnanik.p@fce.vutbr.cz
Keywords: Electrical measurements, geopolymer structure, dielectric losses, permittivity, conductivity, graphite.
Wang: Fractal structure of equipotential curves on a continuum percolation model, Physica A: Statistical Mechanics and its Applications, Vol. 391 (2012), pp. 5802-5809 [6] I.
Wang: Fractal structure of equipotential curves on a continuum percolation model, Physica A: Statistical Mechanics and its Applications, Vol. 391 (2012), pp. 5802-5809 [6] I.
Online since: January 2013
Authors: Ying Liu, Di Zhao, Jiang Tao Wang
Preparation of O-Carboxymethyl chitosan by Schiff Base and Antibacterial Activity
Ying Liua, Di Zhaob and Jiangtao Wangc
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, Shandong, 266100, China
a carrie2004@yeah.net, b luomuxiaoxiao77@126.com, c jtwang@ouc.edu.cn
Keywords: Schiff base; O-Carboxymethyl chitosan; Structure characterization; Antimicrobial activities
Abstract.
The structure was defined by FT-IR, 1HNMR, and elemental analysis
The structure was defined by FT-IR, 1HNMR, and elemental analysis
Online since: April 2013
Authors: Fei Yee Yeoh, Wei Lee Thung, Radzali Othman, Wee Keat Cheah
It can be concluded that all the samples have a similar structure before and after functionalised.
Fig. 5 (a) and (b) shows the chemical structure of APTES and AEAPTS.
The ropelike structure was retained even after functionalised.
Vallet-Regí, Ordered mesoporous materials in the context of drug delivery systems and bone tissue engineering, Chemistry-A European Journal 12 (2006) 5934-5943 [2] T.
Stucky, Morphological control of highly ordered mesoporous silica SBA-15, Chemistry of Materials 12 (2000) 275-279
Fig. 5 (a) and (b) shows the chemical structure of APTES and AEAPTS.
The ropelike structure was retained even after functionalised.
Vallet-Regí, Ordered mesoporous materials in the context of drug delivery systems and bone tissue engineering, Chemistry-A European Journal 12 (2006) 5934-5943 [2] T.
Stucky, Morphological control of highly ordered mesoporous silica SBA-15, Chemistry of Materials 12 (2000) 275-279
Online since: November 2011
Authors: Hao Wu, Chun Xiu Zhang, Jia Ling Pu, Ming Xia Zhang, Gui Sen Fang
A novel triphenylene-based discotic liquid crystal compound 2-(8-bromooctanoic acid ester)-3,6,7,10,11-penta-pentyloxytriphenylene was synthesized in this study.The chemical structure of the compound was characterized by 1HNMR spectra, FT-IR spectra and we confirmed its structure.
Therefore, the synthesis of new liquid crystal materials and the relationship between molecular structure and properties are an important part of this field.Discotic liquid crystals (DLCs) are unique nano-structures with remarkable electronic and optoelectronic properties[1].Triphenylene derivatives play a major role in the research on discotic liquid crystals.Triphenylene as a core for DLCs is attractive for many reasons[2]: it possess C3 symmetry, its chemistry is relatively accessible,its derivatives are thermally as well as chemically stable and they show a variety of mesophases.
Due to their pronounced photoconductivity and high charge carrier mobility, triphenylene-based columnar discotic LCs show great potential as molecular organic materials for optoelectronic devices.Most esters liquid crystal have a low viscosity response speed and other excellent performance, studies on the synthesis of liquid crystal and liquid crystal properties of great significance[3].A novel triphenylene-based discotic liquid crystal compound 2-(8-bromooctanoic acid ester)-3,6,7,10,11-penta-pentyloxytriphenylene was synthesized in this study.The chemical structure of the compound was characterized by 1HNMR spectra, FT-IR spectra.
Results and Discussion The chemical structure of object product were characterized by measuring in CDCl3 on a Brucker Advance spectrometer and FTIR-8400 and was completely in agreement with the predicted.
Therefore, the synthesis of new liquid crystal materials and the relationship between molecular structure and properties are an important part of this field.Discotic liquid crystals (DLCs) are unique nano-structures with remarkable electronic and optoelectronic properties[1].Triphenylene derivatives play a major role in the research on discotic liquid crystals.Triphenylene as a core for DLCs is attractive for many reasons[2]: it possess C3 symmetry, its chemistry is relatively accessible,its derivatives are thermally as well as chemically stable and they show a variety of mesophases.
Due to their pronounced photoconductivity and high charge carrier mobility, triphenylene-based columnar discotic LCs show great potential as molecular organic materials for optoelectronic devices.Most esters liquid crystal have a low viscosity response speed and other excellent performance, studies on the synthesis of liquid crystal and liquid crystal properties of great significance[3].A novel triphenylene-based discotic liquid crystal compound 2-(8-bromooctanoic acid ester)-3,6,7,10,11-penta-pentyloxytriphenylene was synthesized in this study.The chemical structure of the compound was characterized by 1HNMR spectra, FT-IR spectra.
Results and Discussion The chemical structure of object product were characterized by measuring in CDCl3 on a Brucker Advance spectrometer and FTIR-8400 and was completely in agreement with the predicted.