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Online since: July 2012
Authors: Guang Xian Zhang, Wei Hu, Feng Xiu Zhang, Ming Lu, Hui Zheng
They were all in great agreement with the proposed structure.
The structure of eight-membered ring between the two phenyl rings is very stable.
In Fig. 5, all the protons were in good agreement with proposed structure.
Fig. 9 showed a typical spectrum of proposed structure.
They were all in great agreement with the proposed structure.
The structure of eight-membered ring between the two phenyl rings is very stable.
In Fig. 5, all the protons were in good agreement with proposed structure.
Fig. 9 showed a typical spectrum of proposed structure.
They were all in great agreement with the proposed structure.
Online since: March 2012
Authors: Marian Zaborski, Magdalena Lipinska, Anna Laskowska
As the modyfing agents we used the ionic liquids as:
· didecyldimethyl ammonium saccharinate SDDMA (Industrial Chemistry Research Institute, Warsaw, Poland),
· didecyldimethyl ammonium acesulfamate ADDMA (Industrial Chemistry Research Institute, Warsaw, Poland).
This parameter can characterize the tendency of the filler to create „own structure” in elastomer matrix.
Unmodified montmorillonite strongly agglomerated, the particle surface is characterized by undulating structure (Fig 2).
The surface of modified particles is more developed and undulated with many petals, layers and wrinkle structure (Fig 3.)
A similar structure and surface morphology for agglomerates of commercially modified fillers was observed.
This parameter can characterize the tendency of the filler to create „own structure” in elastomer matrix.
Unmodified montmorillonite strongly agglomerated, the particle surface is characterized by undulating structure (Fig 2).
The surface of modified particles is more developed and undulated with many petals, layers and wrinkle structure (Fig 3.)
A similar structure and surface morphology for agglomerates of commercially modified fillers was observed.
Online since: March 2017
Authors: Radosław Zaleski, Marek Gorgol, Agnieszka Kierys
Marii Curie-Sklodowskiej 1, 20-031 Lublin, Poland
2 Faculty of Chemistry, Maria Curie-Sklodowska University,
Pl.
However, there were significant differences between their morphology and arrangement of their internal structure.
Moreover, SBA-15 possess highly ordered mesoporous, whereas Si-A pore structure is disordered.
Such structure of interconnected pores assures easy access to the pores having smaller sizes through the larger ones.
Patterson, 29Si NMR and Raman Glimpses into the Molecular Structures of Acid and Base Set Silica Gels Obtained from TEOS and Na-Silicate, The Journal of Physical Chemistry C 115 (2011) 24788-24799
However, there were significant differences between their morphology and arrangement of their internal structure.
Moreover, SBA-15 possess highly ordered mesoporous, whereas Si-A pore structure is disordered.
Such structure of interconnected pores assures easy access to the pores having smaller sizes through the larger ones.
Patterson, 29Si NMR and Raman Glimpses into the Molecular Structures of Acid and Base Set Silica Gels Obtained from TEOS and Na-Silicate, The Journal of Physical Chemistry C 115 (2011) 24788-24799
Online since: April 2023
Authors: Olga M. Kanunnikova, V.A. Rudenok, G.N. Aristova
Aristova2,c
1,2Department of Chemistry, Izhevsk State Agricultural Academy, 16, Kirov str., Izhevsk, 426000, Russia
a*olam313597@gmail.com (corresponding author), bvrizhevsk@gmail.com,
cgalinaaristova@gmail.com
Keywords: corrosion, zinc coating, chloride solution, meltwater.
As a result of rolling, the large-crystalline columnar structure of cast zinc turns into a deformed fine-grained one [11], which leads to a change in the corrosion behavior.
The reason for the high intensity of corrosion of cast zinc and electroplating is their loose structure: coarse-grained columnar cast zinc and high-porosity electroplating.
Apparently, the compaction of the structure makes it difficult for oxygen to diffuse into the surface layers of rolled products and electroplating, and the corrosion intensity decreases.
Leo, Substituent Constants for Correlation Analysis in Chemistry and Biology, New York, 1981
As a result of rolling, the large-crystalline columnar structure of cast zinc turns into a deformed fine-grained one [11], which leads to a change in the corrosion behavior.
The reason for the high intensity of corrosion of cast zinc and electroplating is their loose structure: coarse-grained columnar cast zinc and high-porosity electroplating.
Apparently, the compaction of the structure makes it difficult for oxygen to diffuse into the surface layers of rolled products and electroplating, and the corrosion intensity decreases.
Leo, Substituent Constants for Correlation Analysis in Chemistry and Biology, New York, 1981
Online since: September 2018
Authors: Nikolay Lyubomirskiy, Stanisław Fic, Sergey I. Fedorkin
Introduction
The physical and mechanical properties of materials are their most important characteristics, which are used in the calculation of building structures made of these materials and products.
For samples of a more homogeneous structure, obtained at a compaction pressure of 30 MPa, μ = 0.17-0.20, which corresponds to the parameters adopted in the calculation of concrete structures.
Kwok, Carbon dioxide sequestration of cement slurry waste and valorisation of FRCAs in eco-construction products by carbonation, 14th International Congress on the Chemistry of Cement (ICCC 2015), in Beijing, China.
Sychev, Systematization of binders, Journal of Applied Chemistry. 3 (1970) 528-533
Sychev, The emergence of hardening structures as a process of self-organization, Works VNIIhimprom. 97 (1998) 115-119
For samples of a more homogeneous structure, obtained at a compaction pressure of 30 MPa, μ = 0.17-0.20, which corresponds to the parameters adopted in the calculation of concrete structures.
Kwok, Carbon dioxide sequestration of cement slurry waste and valorisation of FRCAs in eco-construction products by carbonation, 14th International Congress on the Chemistry of Cement (ICCC 2015), in Beijing, China.
Sychev, Systematization of binders, Journal of Applied Chemistry. 3 (1970) 528-533
Sychev, The emergence of hardening structures as a process of self-organization, Works VNIIhimprom. 97 (1998) 115-119
Online since: June 2013
Authors: Kun Zhang, Zhi Yun Du, Cheng Jie Fu, Zhi Kai Tang, Yan Xiong Fang, Rui Rui Zhang, Yu Jing Lu, Rui Fang Zhang
Structures of cryptolepine (1), 5-methyl-benzofuro[3,2-b]quinoline (2), Amsacrine (3), aniline-substituted derivatives (4).
Result and Discussion Chemistry Scheme 1.
The crystal structure of the complex of proflavin-d[CGATCG]2 (PBD code: 3FT6 [16]) was used as the templates for constructing the molecular model.
Molecular Modeling The crystal structure of a double strand DNA (PDB ID 3FT6 [16]) was used as an initial model to study the interaction between the derivatives and DNA.
Rognan, Proteins: Structure, Function, and Bioinformatics 57(2004), 225–242.
Result and Discussion Chemistry Scheme 1.
The crystal structure of the complex of proflavin-d[CGATCG]2 (PBD code: 3FT6 [16]) was used as the templates for constructing the molecular model.
Molecular Modeling The crystal structure of a double strand DNA (PDB ID 3FT6 [16]) was used as an initial model to study the interaction between the derivatives and DNA.
Rognan, Proteins: Structure, Function, and Bioinformatics 57(2004), 225–242.
Online since: April 2011
Authors: Lerato Shikwambana, Malcolm Govender, Bonex Mwakikunga, Elias Sideras-Haddad, Andrew Forbes
Introduction
Laser pyrolysis (LP) is a modern technique used to synthesize thin films and nano-structured materials.
We review some of the important laser pyrolysis parameters used to synthesize nano-structured materials.
Recently, work to model the synthesis of nano-structures by laser pyrolysis is being investigated by Amara et al.
An accurate description of the reaction zone, Figo2b), is useful since it can provide analytical models such as gas heat transfers, kinetics, chemistry and fluid flow [18].
WO3 and VO2 nano-structures As mentioned earlier, laser pyrolysis has been used to produce various nano-structured materials and Mwakikunga et al [7] where the first group to report on the synthesis of WO3 nano-wires using this technique, Figo3a).
We review some of the important laser pyrolysis parameters used to synthesize nano-structured materials.
Recently, work to model the synthesis of nano-structures by laser pyrolysis is being investigated by Amara et al.
An accurate description of the reaction zone, Figo2b), is useful since it can provide analytical models such as gas heat transfers, kinetics, chemistry and fluid flow [18].
WO3 and VO2 nano-structures As mentioned earlier, laser pyrolysis has been used to produce various nano-structured materials and Mwakikunga et al [7] where the first group to report on the synthesis of WO3 nano-wires using this technique, Figo3a).
Online since: December 2012
Authors: Khatijah A. Yaacob, Jason D. Riley
XRD (X-ray diffraction) was used to analyse the crystal structure of the TiO2 and to calculate the crystallite size of the TiO2 nanoparticles.
Even though this method produce the required crystal structure, but when changing the pH of the TiO2 sol to alkali value gelation was observed.
As can be seen from the XRD results the peak at 32o was assigned to a small amount of brookite structure (indicate by ‘’B’’).
Ice bath temperatures at 1oC and 5oC show an amorphous structure were formed.
Wells, Structural inorganic chemistry.
Even though this method produce the required crystal structure, but when changing the pH of the TiO2 sol to alkali value gelation was observed.
As can be seen from the XRD results the peak at 32o was assigned to a small amount of brookite structure (indicate by ‘’B’’).
Ice bath temperatures at 1oC and 5oC show an amorphous structure were formed.
Wells, Structural inorganic chemistry.
Online since: February 2012
Authors: Zhen Lin Jiang, Shu Ying Fang, Jia Lin Liu, Li Feng Li, Qiong Wang, Chao Sheng Wang
., Ltd, Shanghai 201100, P.R.China
3School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P.
The structure of HPTETOs was characterized by GC-MS, 1H-NMR and FT-IR.
As the HPTETOs was added, the Si–O–Si absorption became lower, and the peaks of Si–O–Si chains were split at the range of 1000-1150cm-1(i.e. 1112 cm-1 and 1052 cm-1), which indicated the 3D polyorganasiloxane network structure was formed.
Fig.5 shows the formation process of nano-micro binary structured polyorganosiloxane film.
Fig.5 Formation process of nano-micro binary structured polyorganosiloxane film Conclusions The HPTETOs was successfully synthesized by the hydrosilylation, and the chemical structure was characterized by GC-MS, 1H-NMR, FT-IR.
The structure of HPTETOs was characterized by GC-MS, 1H-NMR and FT-IR.
As the HPTETOs was added, the Si–O–Si absorption became lower, and the peaks of Si–O–Si chains were split at the range of 1000-1150cm-1(i.e. 1112 cm-1 and 1052 cm-1), which indicated the 3D polyorganasiloxane network structure was formed.
Fig.5 shows the formation process of nano-micro binary structured polyorganosiloxane film.
Fig.5 Formation process of nano-micro binary structured polyorganosiloxane film Conclusions The HPTETOs was successfully synthesized by the hydrosilylation, and the chemical structure was characterized by GC-MS, 1H-NMR, FT-IR.
Online since: July 2004
Authors: K. Hayashi, H. Hayashida, Y. Nakano
Nakano
Laboratory for Solid State Chemistry,
Okayama University of science, 1-1 ridai-cho, Okayama 700 JAPAN
Keywords: rate constant, oxidation, oxidation mechanism, crystal structure, transformation.
As seen in Fig.1, the crystal structure of CuScO2 has a layered structure of ScO2 slabs supported by the copper atoms of the linear coordination.
The crystal structure of Cu2Sc2O5 is the intergrowth NaCl type structure with linear chains of copper atoms 3 .
The HT oxidation destroys the framework structure.
This means that the Cu2Sc2O5 structure has one part similar to the CuScO2 structure.
As seen in Fig.1, the crystal structure of CuScO2 has a layered structure of ScO2 slabs supported by the copper atoms of the linear coordination.
The crystal structure of Cu2Sc2O5 is the intergrowth NaCl type structure with linear chains of copper atoms 3 .
The HT oxidation destroys the framework structure.
This means that the Cu2Sc2O5 structure has one part similar to the CuScO2 structure.