Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: October 2022
Authors: Zhen Yu Guan, Hua Ping Wang, Yu Mei Zhang
Acs Sustainable Chemistry & Engineering, 2017, 5(3):2181-2195
Applied Organometallic Chemistry, 2016
Russian Journal of Inorganic Chemistry, 2008,53(7):1146–1151
Structure and properties of liquid crystalline naphthalenediol copolyesters.
Structure and properties of liquid crystalline naphthalenediol copolyesters.
Applied Organometallic Chemistry, 2016
Russian Journal of Inorganic Chemistry, 2008,53(7):1146–1151
Structure and properties of liquid crystalline naphthalenediol copolyesters.
Structure and properties of liquid crystalline naphthalenediol copolyesters.
Online since: February 2014
Authors: Yi Qi Zhou, Li Wang, Yong Zhen Mi
The interior noise of a cab can be divided into two part: structure-borne noise and air-borne noise, which is similar to that of a car [1].
Free damping structure, containing one layer of viscoelastic material, and constrained damping structure, constituted by one viscoelastic material layer as well as one elastic material layer, are two extensively used damping structures.
Therefore, some measures, such as damping treatment or structure rectification, must be taken to decrease noise on these two frequencies.
Structure-borne noise reduction in a truck cab interior using numerical techniques[J].
Radiation Physics and Chemistry, 2013(8):42-46.
Free damping structure, containing one layer of viscoelastic material, and constrained damping structure, constituted by one viscoelastic material layer as well as one elastic material layer, are two extensively used damping structures.
Therefore, some measures, such as damping treatment or structure rectification, must be taken to decrease noise on these two frequencies.
Structure-borne noise reduction in a truck cab interior using numerical techniques[J].
Radiation Physics and Chemistry, 2013(8):42-46.
Online since: July 2012
Authors: Yue Liu, Ying Liu, Ting Jin Wang, Ying Liu, Xiao Jie Li
Mechanism for synthesizing barium hexagonal ferrite by sol-gel method
Yue Liua, Tingjin Wangb, Ying Liu c, Xiaojie Lid, and Ying Liue, *
College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, PR China
ayueliusd@163.com, b122816654@qq.com, c614324567@qq.com (Undergraduate), dxiaojie1322@126.com, eyingliusd@163.com
Keywords: Sol-gel; barium ferrite; mechanism; synthesis.
The mechanism takes account of the structure of barium hexaferrite and the least structure change principle.
Sankaranarayanan et al [22] note that if a Ba2+ ion from the Ba layer together with an O2- ion (for charge compensation) are removed from the M-type structure, BaFe12Ol9 becomes Fe12O18, i.e.
They reasoned that the absence of Ba2+ ions would make the structure appear as a spinel-like structure (g-Fe2O3) since the M-type structure contains a hexagonal Ba layer sandwiched between spinel blocks.
Eq. 4 can be excluded as a rate determining step since the reactants and products have similar structures.
The mechanism takes account of the structure of barium hexaferrite and the least structure change principle.
Sankaranarayanan et al [22] note that if a Ba2+ ion from the Ba layer together with an O2- ion (for charge compensation) are removed from the M-type structure, BaFe12Ol9 becomes Fe12O18, i.e.
They reasoned that the absence of Ba2+ ions would make the structure appear as a spinel-like structure (g-Fe2O3) since the M-type structure contains a hexagonal Ba layer sandwiched between spinel blocks.
Eq. 4 can be excluded as a rate determining step since the reactants and products have similar structures.
Online since: October 2010
Authors: Ping Ning, Chun Sheng Ding, Qian Fen Zhu, Jing Ke Lu
And its adsorption performance is, in theory, determined by the special surface structure characteristics and the surface chemical properties.
Therefore, the pore structure adjustment and surface groups’ modification of AC plays a very important role in improving the special properties, adsorption and catalytic properties [5].
However, the specific surface area of N2-GAC decreased because reduction modification of thermal N2 would loose the surface structure of GAC, and it consequently caused the block, collapse and destroy of the micro-holes.
Environmental Chemistry, Vol. 20(5)(2001),p.444-448(In Chinese) [12]Yanzhen Fan, Baozhen Wang, Lin Wang et al: J.
Environmental Chemistry,Vol.20(5) (2001),p.437-443(In Chinese) [13]C.
Therefore, the pore structure adjustment and surface groups’ modification of AC plays a very important role in improving the special properties, adsorption and catalytic properties [5].
However, the specific surface area of N2-GAC decreased because reduction modification of thermal N2 would loose the surface structure of GAC, and it consequently caused the block, collapse and destroy of the micro-holes.
Environmental Chemistry, Vol. 20(5)(2001),p.444-448(In Chinese) [12]Yanzhen Fan, Baozhen Wang, Lin Wang et al: J.
Environmental Chemistry,Vol.20(5) (2001),p.437-443(In Chinese) [13]C.
Online since: July 2013
Authors: Liang Chi Zhang, S. Herasati, H.H. Ruan
Model 3 has the same crystal structure as Model 2 (Fig. 1c) but the surrounding PE chain has 6 branches with n = 8.
Peacock, Handbook of Polyethylene Structures - properties and applications, Marcel Dekker, New York, 2002
Yang, Conformational Transition Behavior of Amorphous Polyethylene across the Glass Transition Temperature, The Journal of Physical Chemistry B, 113 (27) (2009) 9077-9083
Suter, Detailed molecular structure of a vinyl polymer glass, Macromolecules, 18 (7) (1985) 1467-1478
Sun, COMPASS:An ab Initio Force-Field Optimized for Condensed-Phase Applications Overview with Details on Alkane and Benzene Compounds, The Journal of Physical Chemistry B, 102 (38) (1998) 7338-7364
Peacock, Handbook of Polyethylene Structures - properties and applications, Marcel Dekker, New York, 2002
Yang, Conformational Transition Behavior of Amorphous Polyethylene across the Glass Transition Temperature, The Journal of Physical Chemistry B, 113 (27) (2009) 9077-9083
Suter, Detailed molecular structure of a vinyl polymer glass, Macromolecules, 18 (7) (1985) 1467-1478
Sun, COMPASS:An ab Initio Force-Field Optimized for Condensed-Phase Applications Overview with Details on Alkane and Benzene Compounds, The Journal of Physical Chemistry B, 102 (38) (1998) 7338-7364
Online since: July 2013
Authors: Hong Hua Liao
The structure diagram of micro-heater and micro temperature sensor of micro-chamber stationary PCR microchip is shown in Figure 3.
The structure diagram of micro-heater and micro temperature sensor of PCR microchip Using the copper as the material of temperature sensor, the main reason is that copper has stable physical and chemical properties, close to the linear input-output characteristics, and it can be easy to integrate with the double spiral copper micro-heater.
Simultaneously, adopting the SOPC technology to design the microchip level PCR instrument, it can effectively simplify the system structure, shorten the time from concept to realization.
Analytical Chemistry, Vol. 73(2001), p. 565 [3] Y.
Analytical Chemistry.
The structure diagram of micro-heater and micro temperature sensor of PCR microchip Using the copper as the material of temperature sensor, the main reason is that copper has stable physical and chemical properties, close to the linear input-output characteristics, and it can be easy to integrate with the double spiral copper micro-heater.
Simultaneously, adopting the SOPC technology to design the microchip level PCR instrument, it can effectively simplify the system structure, shorten the time from concept to realization.
Analytical Chemistry, Vol. 73(2001), p. 565 [3] Y.
Analytical Chemistry.
Online since: September 2021
Authors: Slamet Widodo
Therefore, in this paper we will discuss state-of-the-art technology, design methods, and techniques that can be done to improve the performance of metal oxide based gas sensors through a modification of the structure of the material.
Typical structure of gas sensors fabricated using MEMS technology on silicon substrate.
Although the structure of the metal oxide that is coated depends on the type of substrate, but using a sputtering process the thickness of the metal oxide layer can be controlled more accurately.
,‘High-performance gas sensing of CO: comparative tests for semiconducting (SnO2-ased) and for amperometric gas sensors’, Analytical Chemistry, vol. 71, 1999, pp. 2512 – 2517
[7] Seiyama, T., Kato, A., Fujushi, K., & Nagatani, M., ‘A new detector for gaseous components using semiconductive thin films’, Analytical Chemistry, vol. 34, 1962, p. 1502f
Typical structure of gas sensors fabricated using MEMS technology on silicon substrate.
Although the structure of the metal oxide that is coated depends on the type of substrate, but using a sputtering process the thickness of the metal oxide layer can be controlled more accurately.
,‘High-performance gas sensing of CO: comparative tests for semiconducting (SnO2-ased) and for amperometric gas sensors’, Analytical Chemistry, vol. 71, 1999, pp. 2512 – 2517
[7] Seiyama, T., Kato, A., Fujushi, K., & Nagatani, M., ‘A new detector for gaseous components using semiconductive thin films’, Analytical Chemistry, vol. 34, 1962, p. 1502f
Online since: October 2008
Authors: Zheng Xu, Shou Ci Lu
The structure parameters of this electrostatic disperser are listed in Table1.
The charge voltage is essential to the dispersion and related to the apparatus's structure.
The proper structure can take higher charge voltage, which is very important to the particle charge and the repulsion force between particles and the dispersion degree, but not destroy the corona field.
Ren, Materials Chemistry and Physics 2001, 69, 204-209
Stencel, "Triboelectrostatic Separation of Unburned Carbon from Fly Ash, Reprints", presented at Division of Fuel Chemistry, New Orleans, LA, 1996
The charge voltage is essential to the dispersion and related to the apparatus's structure.
The proper structure can take higher charge voltage, which is very important to the particle charge and the repulsion force between particles and the dispersion degree, but not destroy the corona field.
Ren, Materials Chemistry and Physics 2001, 69, 204-209
Stencel, "Triboelectrostatic Separation of Unburned Carbon from Fly Ash, Reprints", presented at Division of Fuel Chemistry, New Orleans, LA, 1996
Online since: April 2014
Authors: Xu Duo Bai, Hong Ling Li, Yu Zhu, Yan Qiu Wang, Yu Liang, Hai Jun Niu
Electrochromic Property of Cured Epoxy Resins Containing Triphenylamine Moiety
Hongling Lia, Xuduo Baib*, Yu Zhuc, Yanqiu Wangd, Yu Liange and Haijun Niuf
Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, Department of Macromolecular Material and Engineering, School of Chemistry and Chemical Engineering, Harbin 150086, China.
Triphenylamine (TPA) derivatives are popular electrochromic materials due to their merits such as light weight, good processability, structure designable, multi-color changes and fast switching time [4].
The characteristic structure of TPA is electroactive site of the nitrogen center, which is linked to three electron-rich phenyl groups in a propeller-like geometry [5].
FT-IR, 1H NMR and elemental analysis were used to identify the structure of synthesized monomer.
After the reduction, the primary amino groups showed the typical absorption bands at 3459 and 3329 cm-1 due to N-H strentching. 1H NMR of the diamine monomer was agreed well with the proposed molecular structure.
Triphenylamine (TPA) derivatives are popular electrochromic materials due to their merits such as light weight, good processability, structure designable, multi-color changes and fast switching time [4].
The characteristic structure of TPA is electroactive site of the nitrogen center, which is linked to three electron-rich phenyl groups in a propeller-like geometry [5].
FT-IR, 1H NMR and elemental analysis were used to identify the structure of synthesized monomer.
After the reduction, the primary amino groups showed the typical absorption bands at 3459 and 3329 cm-1 due to N-H strentching. 1H NMR of the diamine monomer was agreed well with the proposed molecular structure.
Online since: January 2009
Authors: Ding Fei Zhang, Xu Yang, Fu Sheng Pan
A Study on Corrosion Inhibitor for Magnesium Alloy
Xu YANG 1,a
, Fusheng PAN
2,b
, Dingfei ZHANG 3,c
1
College of Materials Science and Engineering of Chongqing University, Chongqing 400044, China
1
Chemistry Department, the Third Military Medical University, Chongqing 400038,China
2
College of Materials Science and Engineering of Chongqing University, Chongqing 400044, China
3
College of Materials Science and Engineering of Chongqing University, Chongqing 400044, China
a
yangxu2524@yahoo.com.cn, bfspan@cqu.edu.cn, c
zhangdingfei@ cqu.edu.cn,
Keywords: Magnesium Alloy, Electrochemical Deposition, Polarization, CorrosionInhibitor, Phytic
acid, p-Nitro-benzene-azo-resorcinol
Abstract.
FT-IR absorption spectra were measured using a high-performance Nicolet/5DXC FT-IR spectrometer (Nicolet) to investigate the structure of the deposition on magnesium alloy surface.
Fig. 2 The SEM surface morphologies (a and b) and EDS surface composition analysis(c and d) for magnesium alloy before (a and c) and after (b and d) potentiostatic polarization tests in alkali In order to further understand the corrosion inhibition of PNBAR, the structure of PNBAR deposition was investigated with FTIR spectra.
These showed that the PNBAR had changed the structure of hydroxybenzene into the structure of benzoquinone in the process of forming organic deposition in the alkali solution [17], when the surface b b a b c d Fig. 3 FTIR spectra of PNBAR and the PNBAR deposition: (a) PNBAR, (b) PNBAR deposition by electrochemical method in alkali solution.
Analytical Chemistry, Southwest China Normal University Press, Chongqing(1987).
FT-IR absorption spectra were measured using a high-performance Nicolet/5DXC FT-IR spectrometer (Nicolet) to investigate the structure of the deposition on magnesium alloy surface.
Fig. 2 The SEM surface morphologies (a and b) and EDS surface composition analysis(c and d) for magnesium alloy before (a and c) and after (b and d) potentiostatic polarization tests in alkali In order to further understand the corrosion inhibition of PNBAR, the structure of PNBAR deposition was investigated with FTIR spectra.
These showed that the PNBAR had changed the structure of hydroxybenzene into the structure of benzoquinone in the process of forming organic deposition in the alkali solution [17], when the surface b b a b c d Fig. 3 FTIR spectra of PNBAR and the PNBAR deposition: (a) PNBAR, (b) PNBAR deposition by electrochemical method in alkali solution.
Analytical Chemistry, Southwest China Normal University Press, Chongqing(1987).