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Online since: January 2014
Authors: Wei Wang, Ping Hao Ni
The system consists of distributed data acquisition devices, a communication system based on field bus, and a host based on B/S structure.
During the long-term period of operation, the insulation strength of a circuit breaker will reduce, its electrical life will shorten, and its mechanical condition will be damaged, even it will break down, due to the influence of mechanics, hot and damp weather, high voltage, chemistry, and other environmental factors.
System Structure The data acquisition unit of the circuit breaker is based on a microprocessor, and it mainly acquires and transmits the monitoring data from the circuit breaker.
The host of the monitoring system is based on the B/S structure, namely Browser/Server structure, and the host is generally installed in the central control room of the plant where the monitored circuit breakers locate.
Therefore, its feature values will greatly change when loose, abrasion, rupture, and other abnormal events occur in the mechanical structure of the circuit breakers.
During the long-term period of operation, the insulation strength of a circuit breaker will reduce, its electrical life will shorten, and its mechanical condition will be damaged, even it will break down, due to the influence of mechanics, hot and damp weather, high voltage, chemistry, and other environmental factors.
System Structure The data acquisition unit of the circuit breaker is based on a microprocessor, and it mainly acquires and transmits the monitoring data from the circuit breaker.
The host of the monitoring system is based on the B/S structure, namely Browser/Server structure, and the host is generally installed in the central control room of the plant where the monitored circuit breakers locate.
Therefore, its feature values will greatly change when loose, abrasion, rupture, and other abnormal events occur in the mechanical structure of the circuit breakers.
Online since: August 2020
Authors: Ravisara Chainaruprasert, Thirawudh Pongprayoon
The synthesized nanosilica particles from a laboratory vessel and designed reactor were the same as % yield production, components, physical structure, silica purity, and nanoparticle size.
Thi Kim Dung, Preparation and characterization of nanosilica from rice husk ash by chemical treatment combined with calcination, Vietnam Journal of Chemistry International Edition. 55 (2017) 455-459
Thi Kim Dung, Preparation and characterization of nanosilica from rice husk ash by chemical treatment combined with calcination, Vietnam Journal of Chemistry International Edition. 55 (2017) 455-459
Online since: February 2016
Authors: Pyotr P. Shchetinin, Margarita Shurupova
It is supposed that it was mainly due to the high-porous structure of the material.
This is probably due to the histological structure and high porosity of the material, which has an effect on the grass meal’s AA.
This can be due to an optimal ratio betwen the specific contacting area and undistorted cell structures with micropores of the studied material.
It is supposed that it was mainly due to the high-porous structure of the material.
Chemistry [Zhurnal sibirskogo federal'nogo universiteta.
This is probably due to the histological structure and high porosity of the material, which has an effect on the grass meal’s AA.
This can be due to an optimal ratio betwen the specific contacting area and undistorted cell structures with micropores of the studied material.
It is supposed that it was mainly due to the high-porous structure of the material.
Chemistry [Zhurnal sibirskogo federal'nogo universiteta.
Online since: January 2022
Authors: Ye Xuan Cheng
These microporous structures often have large potential voids, leading to a high surface area.
Structures of UTSA-280 are shown in Fig. 1.
Structure of activated UTSA-280 (i.e. water molecules are removed), showing empty one dimensional channel.
Structure of UTSA-280 binding with ethylene, showing one dimensional channel occupied by ethylene molecules.
MOFs have their advantaged structures that can offer both selectivity and rigidity.
Structures of UTSA-280 are shown in Fig. 1.
Structure of activated UTSA-280 (i.e. water molecules are removed), showing empty one dimensional channel.
Structure of UTSA-280 binding with ethylene, showing one dimensional channel occupied by ethylene molecules.
MOFs have their advantaged structures that can offer both selectivity and rigidity.
Online since: March 2012
Authors: Yi Guo Su, Xiao Qing Liu, Xiao Jing Wang, Li Lv, Yu Zhe Xie
Controllable synthesis of CaMoO4 microcrystals with tailored morphologies and optical properties
Li Lv1, 2, a, Yuzhe Xie1, b, Xiaoqing Liu,1, c Yiguo Su,1, d and Xiaojing Wang1*, e
1College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, P.
Moreover, it is seen that CaMoO4 can be well crystallized with tetragonal structure at room temperature.
The SEM images shown in figure 3 clearly reveal the crystallite structures of as-prepared CaMoO4.
The scheelite crystal structure of CaMoO4 is characterized by the tetragonal space group I41/a or C4h6.
For Td-symmetry, the scheelite structure has four vibrations, specified as ν1 (A1), ν2 (E), ν3 (F2) and ν4 (F2).
Moreover, it is seen that CaMoO4 can be well crystallized with tetragonal structure at room temperature.
The SEM images shown in figure 3 clearly reveal the crystallite structures of as-prepared CaMoO4.
The scheelite crystal structure of CaMoO4 is characterized by the tetragonal space group I41/a or C4h6.
For Td-symmetry, the scheelite structure has four vibrations, specified as ν1 (A1), ν2 (E), ν3 (F2) and ν4 (F2).
Online since: February 2016
Authors: Klaus Funke
Physical Chemistry was a young and flourishing branch of science, and since 1905 one of its founders and most renowned representatives, Walther Nernst, held the professorial chair of Physical Chemistry at the University of Berlin.
At that time, one of Carl Tubandt’s PhD students, Wilhelm Jost, held the professorial chair of Physical Chemistry at the University of Göttingen.
Fig. 5 Crystal structure of α-AgI according to Wright and Fender [26].
Lechner, in: Microscopic Structure and Dynamics of Liquids, J.
Funke, in: Methods of Physical Chemistry, vpl. 1, R.
At that time, one of Carl Tubandt’s PhD students, Wilhelm Jost, held the professorial chair of Physical Chemistry at the University of Göttingen.
Fig. 5 Crystal structure of α-AgI according to Wright and Fender [26].
Lechner, in: Microscopic Structure and Dynamics of Liquids, J.
Funke, in: Methods of Physical Chemistry, vpl. 1, R.
Online since: May 2022
Authors: Md. Rabiul Karim, Tonmoye Sarkar Shathi, Md. Abdur Rahman, Hasan Ahmad
The TEM images showed that nanoscale hollow structures with 20-30 nm diameter pore size and 7 nm wall thickness were formed at < 25ºC (Fig. 2) whereas microsized sheet-like structures were obtained at > 50ºC.
The XRD pattern of fabricated material exhibited four well-defined peaks due to the crystalline structure of ZnPNPs.
Applications of ZnPNPs Material chemistry Table 2 shows the applications summary of ZnPNPs.
Medical Chemistry Drug carrier Drug carrier is used to ensure sustained drug delivery as well as to minimize systemic side effects [106, 107].
Holec, Surface energy of nanoparticles–influence of particle size and structure, Beilstein J.
The XRD pattern of fabricated material exhibited four well-defined peaks due to the crystalline structure of ZnPNPs.
Applications of ZnPNPs Material chemistry Table 2 shows the applications summary of ZnPNPs.
Medical Chemistry Drug carrier Drug carrier is used to ensure sustained drug delivery as well as to minimize systemic side effects [106, 107].
Holec, Surface energy of nanoparticles–influence of particle size and structure, Beilstein J.
Online since: September 2023
Authors: Anja Pfennig, Marcus Wolf
Mechanical Engineering, Applied University of Berlin HTW, Berlin, Germany
2Federal Institute of Materials Research and Testing BAM, Berlin, Germany
amarcus.wolf@bam.de, banja.pfennig@htw-berlin.de
Keywords: duplex steel, corrosion, corrosion fatigue, micro structure, axial load, rotation bending load.
Additional analysis of the alloy’s chemical composition was gathered via Electron Probe Microanalyzer JXA8900-RL separately for each phase. [1] Results and Discussion Regarding fracture surface and microstructure there is no difference in crack surface formation or micro crack structure as a function of rotation bending or push/pull load (a mechanistic model was given earlier [1,23,24].
With increasing magnitude of the passivating layer it becomes more susceptible to degradation or delamination due to its brittle nature of the ceramic layer structure [28].
Fliigge.: Fresenius J. of Analytical Chemistry 341 (1991), p. 427–431
Additional analysis of the alloy’s chemical composition was gathered via Electron Probe Microanalyzer JXA8900-RL separately for each phase. [1] Results and Discussion Regarding fracture surface and microstructure there is no difference in crack surface formation or micro crack structure as a function of rotation bending or push/pull load (a mechanistic model was given earlier [1,23,24].
With increasing magnitude of the passivating layer it becomes more susceptible to degradation or delamination due to its brittle nature of the ceramic layer structure [28].
Fliigge.: Fresenius J. of Analytical Chemistry 341 (1991), p. 427–431
Online since: May 2014
Authors: Halidan Maimaiti, Xuekelaiti Aerken
The Structure and Properties of Sulfo-butylated Celluluse Ether (SBC) Based Water-reducing Agents
Halidan Maimaiti1,a , Xuekelaiti Aerken2,b
1Institute of Chemistry and Chemical Industry, Xinjiang University, Urumqi 830046, Xinjiang, China
2Health Science Center(PUHSC) pharmaceutical college,Peking University,Beijing,China
aemail: halidan66@xju.edu.cn, bemail: 383670385@qq.com
Keywords: Sulfo-butylated cellulose ether; Water-reducing agent;Water-reduction;Retarding effect.
Results and discussion Product structure The FT-IR spectra of the MCC and SBC are shown in Fig. 1.
Further reaction of the MCC with the BS resulted in SBC, an amorphous structure, meaning the fiber structure no longer existed.
The effect of SBC structure on the properties of cement hydration The setting time of the cement paste reflects to some extent the impact of the water-reducing agent on cement hydration.
The SEM and XRD analysis results showed that the SBC synthesis used MCC and that the BS had basically no fiber structure, suggesting that the product was transformed into an amorphous structure after etherification.
Results and discussion Product structure The FT-IR spectra of the MCC and SBC are shown in Fig. 1.
Further reaction of the MCC with the BS resulted in SBC, an amorphous structure, meaning the fiber structure no longer existed.
The effect of SBC structure on the properties of cement hydration The setting time of the cement paste reflects to some extent the impact of the water-reducing agent on cement hydration.
The SEM and XRD analysis results showed that the SBC synthesis used MCC and that the BS had basically no fiber structure, suggesting that the product was transformed into an amorphous structure after etherification.
Online since: December 2013
Authors: Xiang Hui Hou, Rosniza Hussin, Kwang Leong Choy
XRD patterns confirmed that ZnO with wutrtize crystal structure and TiO2 with anatase structure were presented.
All XRD patterns confirmed that ZnO with wutrtize crystal structure and TiO2 with anatase structure were presented.
XRD pattern of ZnO thin film matched with the wurtize structure (JCP 22.2CA 01-079-2205) and TiO2 thin films matched with the anatase structure (JCPDS pattern 00-021-1272).
All the peaks of the single layer ZnO deposited using 1200 cycles are in good accordance with the diffraction values of hexagonal wurtzite structure with predominantly (00.2) orientation.
Chang, Atomic layer-controlled growth of transparent conducting ZnO on plastic substrates ,Materials Chemistry and Physics 58 (1999) 132-138
All XRD patterns confirmed that ZnO with wutrtize crystal structure and TiO2 with anatase structure were presented.
XRD pattern of ZnO thin film matched with the wurtize structure (JCP 22.2CA 01-079-2205) and TiO2 thin films matched with the anatase structure (JCPDS pattern 00-021-1272).
All the peaks of the single layer ZnO deposited using 1200 cycles are in good accordance with the diffraction values of hexagonal wurtzite structure with predominantly (00.2) orientation.
Chang, Atomic layer-controlled growth of transparent conducting ZnO on plastic substrates ,Materials Chemistry and Physics 58 (1999) 132-138