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Online since: June 2012
Authors: N. Cornei, M.L. Craus, E. Anitas, A. Islamov, V. Garamus
Magnetic Structure of La0.54Ho0.11Sr0.35Mn1-xCuxO3 Manganites
M.
Cuza" University, Chemistry Department, Blvd.
The aim of present paper is to investigate the correlation between the Cu content, crystal structure, magnetic structure and transport characteristics in La0.54Ho0.11Sr0.35Mn1-xCuxO3-d (LHSMCO) manganites. 2.
It is known that the manganite structure is formed by chains of MnO6 octahedra.
It is an indication a looser structure at higher values of Cu content.
Cuza" University, Chemistry Department, Blvd.
The aim of present paper is to investigate the correlation between the Cu content, crystal structure, magnetic structure and transport characteristics in La0.54Ho0.11Sr0.35Mn1-xCuxO3-d (LHSMCO) manganites. 2.
It is known that the manganite structure is formed by chains of MnO6 octahedra.
It is an indication a looser structure at higher values of Cu content.
Online since: April 2014
Authors: Qu Li, Jing Liang, Dong Teng Long, Wei Liang Cheng, Chang Qing Dong, Jun Jiao Zhang
Co-doped Fe2O3 oxygen carriers reacted with CO were investigated in order to study the temperature effect on the redox characterization.Co-Fe2O3 were characterized with X-ray diffraction(XRD), BET and transmission electron microscope(TEM), which showed that the surface structure was regular, and the polymorph was stable.
The structure was characterized by BET, TEM and XRD.
In figure 3a, the oxygen carrier particles presented tetragonal structure, the Co0.1Fe size was approximately 3nm.
Industrial and Engineering Chemistry Research: ACS Publication, Vol. 35 (1996), p. 2469
Nickel-copper oxygen carriers to reach zero CO and H2 emissions in chemical-looping combustion: Industrial and Engineering Chemistry Research.
The structure was characterized by BET, TEM and XRD.
In figure 3a, the oxygen carrier particles presented tetragonal structure, the Co0.1Fe size was approximately 3nm.
Industrial and Engineering Chemistry Research: ACS Publication, Vol. 35 (1996), p. 2469
Nickel-copper oxygen carriers to reach zero CO and H2 emissions in chemical-looping combustion: Industrial and Engineering Chemistry Research.
Online since: December 2014
Authors: Xiao Ming Li
It plays an important role in studying the macro-molecular chemical structure of coal.
The thickness and the structure of these coal beds change considerably in both trends and tendency.
However, the response of aromatic structures (C=C) with higher degree of stability and larger activation energy to stress is just the contrary to the structure of the aliphatic.
Tectonic Coals: Structures and Physical Properties of Reservoirs.
Electron microprobe and micro-FTIR analyses applied to maceral chemistry[J].
The thickness and the structure of these coal beds change considerably in both trends and tendency.
However, the response of aromatic structures (C=C) with higher degree of stability and larger activation energy to stress is just the contrary to the structure of the aliphatic.
Tectonic Coals: Structures and Physical Properties of Reservoirs.
Electron microprobe and micro-FTIR analyses applied to maceral chemistry[J].
Online since: September 2021
Authors: Zakhirat Sultigova, Arsen Kharaev, Rima Bazheva, Zareta Inarkieva, Maryam Parchieva
The composition and structure of the obtained modified polyesters were confirmed by the data of elemental analysis and IR spectroscopy.
Synthesis, structure and ring‐opening polymerization of phenolphthalein macrocyclic polyarylates.
Macromolecular Chemistry and Physics. 2000.
Journal of Polymer Science Part A: Polymer Chemistry. 2000.
Chemistry and Chemical Technology. 2017. 11. № 2.
Synthesis, structure and ring‐opening polymerization of phenolphthalein macrocyclic polyarylates.
Macromolecular Chemistry and Physics. 2000.
Journal of Polymer Science Part A: Polymer Chemistry. 2000.
Chemistry and Chemical Technology. 2017. 11. № 2.
Structural Stability of Composite Materials Prepared by Explosion Welding after their Heat Treatment
Online since: April 2010
Authors: Milan Turňa, Peter Nesvadba, Martin Tršo, Michal Benák
., Research Institute of Industrial Chemistry, 532 17 Pardubice - Semtin,
Czech Republic
amartin.trso@stuba.sk, b
michal.benak@stuba.sk, cmilan.turna@stuba.sk,
d
petr.nesvadba@explosia.cz
Keywords: Explosion Welding, Trimetals, Heat Treatment, Bond Quality, Optical Microscopy,
Microhardness, X-ray microanalysis
Abstract.
The mentioned trimetals were prepared at Explosia Inc., Research Institute of Industrial Chemistry Pardubice-Semtín.
The critical point is always the joint boundary of the clad bimetal (trimetal) which is thermally loaded at welding of the inter-piece with individual parts of structure, eventually that part could be thermally loaded during the service, which is usually supplemented also by mechanical loading.
As concluded by the authors, the damage of structure in trimetal steel-Al-Al has occurred after the exposure time of 100 hrs.
By authors, the damage of structure in steel-Cu-Al specimen occurred after 25 hours.
The mentioned trimetals were prepared at Explosia Inc., Research Institute of Industrial Chemistry Pardubice-Semtín.
The critical point is always the joint boundary of the clad bimetal (trimetal) which is thermally loaded at welding of the inter-piece with individual parts of structure, eventually that part could be thermally loaded during the service, which is usually supplemented also by mechanical loading.
As concluded by the authors, the damage of structure in trimetal steel-Al-Al has occurred after the exposure time of 100 hrs.
By authors, the damage of structure in steel-Cu-Al specimen occurred after 25 hours.
Online since: November 2021
Authors: Tanagorn Kwamman, Threeraphat Chutimasakul, Pattra Lertsarawut, Sakchai Laksee, Tinutda Phonlam, Wilasinee Kingkam, Varistha Chobpattana
The XRD diffraction pattern is used to investigate the structure and crystallinity of ACs.
The broad peaks would originate from the combination of aromatic layers and disorder structures [10].
The carbon structure of ACs also was studied by Raman spectroscopy, as shown in Figure 1(b).
Carrasco-Marı́n, Changes in surface chemistry of activated carbons by wet oxidation.
[17] Figueiredo, J.L., et al., Modification of the surface chemistry of activated carbons.
The broad peaks would originate from the combination of aromatic layers and disorder structures [10].
The carbon structure of ACs also was studied by Raman spectroscopy, as shown in Figure 1(b).
Carrasco-Marı́n, Changes in surface chemistry of activated carbons by wet oxidation.
[17] Figueiredo, J.L., et al., Modification of the surface chemistry of activated carbons.
Online since: June 2011
Authors: Xiao Feng Wu, Yu Chao Liao, Ren Liang Yue, Yun Fa Chen
Introduction
Composite particles with core-shell structures are of great scientific and technological interests due to their tunable dimensions, compositions, structures, functionality and reactivity of shell surfaces [1].
Thus it is very challenging to prepare core-shell particles and hollow spheres with tunable shell dimensions, morphologies, structures surface functionality and/or reactivity.
However, it is still complex to control the shape, structure of shells, principally since it refers to solid-state chemistry, interfacial reaction kinetics and solution chemistry.
The work reported in this paper aimed at investigating the heterogeneous precipitation of silica species on colloidal PS particles to form the core-shell PS/SiO2 particles and hollow SiO2 microspheres using the solution chemistry of TEOS-ammonium-water-ethanol and growth kinetics of silica particles.
In this work, the very first question to answer was whether or not the solution chemistry of TEOS-ammonia-ethanol led to the formation of SiO2 shells onto PS particles.
Thus it is very challenging to prepare core-shell particles and hollow spheres with tunable shell dimensions, morphologies, structures surface functionality and/or reactivity.
However, it is still complex to control the shape, structure of shells, principally since it refers to solid-state chemistry, interfacial reaction kinetics and solution chemistry.
The work reported in this paper aimed at investigating the heterogeneous precipitation of silica species on colloidal PS particles to form the core-shell PS/SiO2 particles and hollow SiO2 microspheres using the solution chemistry of TEOS-ammonium-water-ethanol and growth kinetics of silica particles.
In this work, the very first question to answer was whether or not the solution chemistry of TEOS-ammonia-ethanol led to the formation of SiO2 shells onto PS particles.
Online since: January 2010
Authors: Wen Long
The overall structure of MES requirements acquiring based on ontology is showed in Fig. 5.
MES domain static model can be described with classes, attributes, methods and structure diagrams of classes in domain and domain classes are abstracted form objects of domain.
Computer and Applied Chemistry, (2005), Vol. 22, No. 9, pp. 787~792 (in Chinese)
Computers and Applied Chemistry, (2005), Vol 22, No8, pp. 667~670 (in Chinese)
Research and development of ERP system for pharmacy, Computers and Applied Chemistry, (2005), Vol 22, No7, pp. 517~520 (in Chinese).
MES domain static model can be described with classes, attributes, methods and structure diagrams of classes in domain and domain classes are abstracted form objects of domain.
Computer and Applied Chemistry, (2005), Vol. 22, No. 9, pp. 787~792 (in Chinese)
Computers and Applied Chemistry, (2005), Vol 22, No8, pp. 667~670 (in Chinese)
Research and development of ERP system for pharmacy, Computers and Applied Chemistry, (2005), Vol 22, No7, pp. 517~520 (in Chinese).
Online since: April 2014
Authors: Yu Han Li, Ri Zhe Jin
R. of China
2 Polymer Composites Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.
The radiation chemistry is a very effective method for constructing three-dimensional polymeric networks.
Figure 1 showed the molecular structure of the SPI-S membrane.
As mentioned in previous sections, crosslinking could suppress chain mobility and make the network structure of membranes more compact.
K., Sabharwal S., Radiation Physics and Chemistry Vol. 80(2011), p. 803 [11] Li Y., Jin R., Cui Z., Wang Z., Xing W., Qiu X..
The radiation chemistry is a very effective method for constructing three-dimensional polymeric networks.
Figure 1 showed the molecular structure of the SPI-S membrane.
As mentioned in previous sections, crosslinking could suppress chain mobility and make the network structure of membranes more compact.
K., Sabharwal S., Radiation Physics and Chemistry Vol. 80(2011), p. 803 [11] Li Y., Jin R., Cui Z., Wang Z., Xing W., Qiu X..
Online since: December 2011
Authors: Lin Li, Zhao Mei Wang, Cui Zheng, Na Li, Hao Pang
Despite its huge annual production and easy accessibility, chitin still remains as an unutilized biomass resource primarily because of its intractable bulk structure, chitin exists in several forms depending on its crystalline structure.
Its component and structure impart it with insoluble characteristics in common organic solvents, water, or cold alkalis of any concentration and intractability to manipulate.
In order to further prove the degree of dissolution of chitosan in the IL, the crystal structure of chitosan and chitosan/IL solutions were determined by WAXD.
The native crystal structure of chitosan is barely reconstituted but suffers a remarkable decrease in the crystallinity.
Li: Green Chemistry.
Its component and structure impart it with insoluble characteristics in common organic solvents, water, or cold alkalis of any concentration and intractability to manipulate.
In order to further prove the degree of dissolution of chitosan in the IL, the crystal structure of chitosan and chitosan/IL solutions were determined by WAXD.
The native crystal structure of chitosan is barely reconstituted but suffers a remarkable decrease in the crystallinity.
Li: Green Chemistry.