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Online since: April 2014
Authors: Mitch Irene Kate N. Galvan, Leslie Joy L. Diaz, Junierose C. Diamante
Then, the effect of structure on the electrical conductivity of PCN was investigated.
The amount of exchanged Li+ was identified using Inductive Coupled Plasma (ICP) analysis (Shimadzu ICPS 7510, Philippine Institute of Pure and Applied Chemistry), whereas, the amount of Cl- ion remaining in the sample was quantified using DIONEX Ion Chromatography DX-120.
The structure of the PAN/Li-MMT nanocomposite was investigated using XRD analysis.
The structure of Li-MMT was also investigated using XRD analysis.
XRD pattern of Na-MMT (NMT-00) and Li-MMT (LMT-00) Structure of PAN/Li-MMT nanocomposite.
The amount of exchanged Li+ was identified using Inductive Coupled Plasma (ICP) analysis (Shimadzu ICPS 7510, Philippine Institute of Pure and Applied Chemistry), whereas, the amount of Cl- ion remaining in the sample was quantified using DIONEX Ion Chromatography DX-120.
The structure of the PAN/Li-MMT nanocomposite was investigated using XRD analysis.
The structure of Li-MMT was also investigated using XRD analysis.
XRD pattern of Na-MMT (NMT-00) and Li-MMT (LMT-00) Structure of PAN/Li-MMT nanocomposite.
Online since: May 2007
Authors: Yuan Hua Mu, Hong Li, Xue Jiang Wang, Hong Zhao Xiang, Yu Bao Li
Furthermore, macroporous structure of the scaffolds and mechanical
strength were tested with a changed ratio of porogens (PVP/NaCl).
Introduction Biomaterials with a porous structure are found to be important for tissue ingrowth and regeneration.
With the degradation of chitosan, there will be better porous structures formed in the scaffold, which is benefit to cells growth [5].
Finally, the salt and PVP particulates were leached out to yield a porous structure.
SEM photos show a highly porous structure and good interconnectivity.
Introduction Biomaterials with a porous structure are found to be important for tissue ingrowth and regeneration.
With the degradation of chitosan, there will be better porous structures formed in the scaffold, which is benefit to cells growth [5].
Finally, the salt and PVP particulates were leached out to yield a porous structure.
SEM photos show a highly porous structure and good interconnectivity.
Online since: June 2015
Authors: Ahmad Zamani Ab Halim, Rusmidah Ali, Wan Azelee Wan Abu Bakar
Green Technology Purification Of Nature Gas Via Co2/H2 Methanation
By Using Trimetallic Ru/Mn/Fe-Al2O3 Oxide Catalyst
Ahmad Zamani Ab Halim1,a, Rusmidah Ali1,b*, Wan Azelee Wan Abu Bakar1,c
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia
81310 UTM Skudai, Johor, Malaysia
azamani82@gmail.com, brusmidah@kimia.fs.utm.my, cwazelee@kimia.fs.utm.my
Keywords: Green technology, Natural gas, CO2 Methanation, Catalyst, Iron Based oxide
Abstract.
Moreover, the XRD patterns showed that the catalyst calcined at high temperature was highly crystalline phase while, catalysts calcined at low temperature showed a highly amorphous structure which was dominated by Al2O3 support material.
According to Wan Azelee et.al, [6] during calcination, several processes will occur such as the loss of chemically bounded water or CO2, modification of the texture through sintering, modification of the structure, active phase generation and stabilization of mechanical properties.
The XRD patterns showed that the catalyst calcined at 1000oC are highly crystalline phase while, catalysts calcined below 700oC showed highly amorphous in structure which dominated by Al2O3 support material.
Abd Rahim, Manganese oxide doped noble metals supported catalyst for carbon dioxide methanation reaction, Chemistry and Chemical Engineering. 17 (2010) 115-123.
Moreover, the XRD patterns showed that the catalyst calcined at high temperature was highly crystalline phase while, catalysts calcined at low temperature showed a highly amorphous structure which was dominated by Al2O3 support material.
According to Wan Azelee et.al, [6] during calcination, several processes will occur such as the loss of chemically bounded water or CO2, modification of the texture through sintering, modification of the structure, active phase generation and stabilization of mechanical properties.
The XRD patterns showed that the catalyst calcined at 1000oC are highly crystalline phase while, catalysts calcined below 700oC showed highly amorphous in structure which dominated by Al2O3 support material.
Abd Rahim, Manganese oxide doped noble metals supported catalyst for carbon dioxide methanation reaction, Chemistry and Chemical Engineering. 17 (2010) 115-123.
Online since: October 2015
Authors: Roslanzairi Mostafa, Mohd Ashraf Mohamad Ismail, Sharifah Farah Fariza Syed Zainal, Romziah Azit
These data were clustered along the local meteoric water line (LMWL), indicating that the groundwater originated from meteoric water. δ2H and δ18O data, primarily indicate the recharge altitude from 100 m to 550 m which was controlled by the sub- vertical flow path mainly from geological structures (i.e., fractures and faults), followed by the groundwater.
Introduction Groundwater chemistry depends on several factors, such as the general geology of the area, the degree of chemical weathering of various rock types, water quality, recharge rate, flow path and input from other sources of water, and rock interaction [1-3].
With the existence of multi-topographical scale along the tunnel alignment from shallow (12 m) to very high (1246 m) tunnel overburden and intersection of several major geological structures (Krau Fault, Karak Fault, Bukit Tinggi fault, Kongkoi Fault, Tekali fault, and a few lineaments) with various lithology units, the tunneling project serves as an excellent test site for the exploratory study of the effects of multi-scale topographical features and geological characteristics on the rock-groundwater hydrogeochemistry interaction, which can serve as a bases for the study of the shallow-medium-deep hydrogeological environment in Malaysia.
Marechal and Etcheverry, [5] elucidated that 18O data mainly reflect recharge altitude which can be predicted by considering the large scale of geological structure of each massif, and controlling the sub vertical path followed by the groundwater.
Hunziker, Chemistry, isotope values (δD, δ18O, δ34SSO4) and temperatures of the water inflows in two Gotthard tunnels, Swiss Alps, Applied Geochemistry, 16 (2001) 633-649
Introduction Groundwater chemistry depends on several factors, such as the general geology of the area, the degree of chemical weathering of various rock types, water quality, recharge rate, flow path and input from other sources of water, and rock interaction [1-3].
With the existence of multi-topographical scale along the tunnel alignment from shallow (12 m) to very high (1246 m) tunnel overburden and intersection of several major geological structures (Krau Fault, Karak Fault, Bukit Tinggi fault, Kongkoi Fault, Tekali fault, and a few lineaments) with various lithology units, the tunneling project serves as an excellent test site for the exploratory study of the effects of multi-scale topographical features and geological characteristics on the rock-groundwater hydrogeochemistry interaction, which can serve as a bases for the study of the shallow-medium-deep hydrogeological environment in Malaysia.
Marechal and Etcheverry, [5] elucidated that 18O data mainly reflect recharge altitude which can be predicted by considering the large scale of geological structure of each massif, and controlling the sub vertical path followed by the groundwater.
Hunziker, Chemistry, isotope values (δD, δ18O, δ34SSO4) and temperatures of the water inflows in two Gotthard tunnels, Swiss Alps, Applied Geochemistry, 16 (2001) 633-649
Online since: August 2013
Authors: Ji Xing Xie, Ying Song, Shan Zhao
The branched structure of copolymer of lactic acid/bicine was characterized by 1H NMR and intrinsic viscosity.
All the data indicated the molecule structure of copolymer was branched.
With the branched structure the intrinsic viscosity ([η]) of polymer should be lower than that of linear polymer.
That indicated the branched structure polymer was obtained.
The hydroxyl number of the copolymer were higher than that of homopolymer, although the molecular weigh was lower which also showed the structure of the copolymer was branched.
All the data indicated the molecule structure of copolymer was branched.
With the branched structure the intrinsic viscosity ([η]) of polymer should be lower than that of linear polymer.
That indicated the branched structure polymer was obtained.
The hydroxyl number of the copolymer were higher than that of homopolymer, although the molecular weigh was lower which also showed the structure of the copolymer was branched.
Online since: August 2022
Authors: Muhammad Uzman, Muhammad Shahid, Muhammad Arfan, Mehmoona Faryal
Chigondo, Recent natural corrosion inhibitors for mild steel: an overview, J. of Chemistry (2016)
Materials chemistry and physics 105(1) (2007) 1-5
Molecular Structure 1119 (2016) 314-324
Molecular Structure 996(1-3) (2011) 101-109
Materials Chemistry and Physics 142(2-3) (2013) 502-512
Materials chemistry and physics 105(1) (2007) 1-5
Molecular Structure 1119 (2016) 314-324
Molecular Structure 996(1-3) (2011) 101-109
Materials Chemistry and Physics 142(2-3) (2013) 502-512
Online since: October 2022
Authors: Valera Veryazov, Alexei I. Abrikosov
Abrikosov1,a and Valera Veryazov2,b *
1Department of Science and Technology, Linköping University, Norrköping 60174, Sweden
2Theoretical Chemistry, POB 124, Lund University, Lund 22100, Sweden
aalexei.abrikossov@liu.se, bvalera.veryazov@teokem.lu.se
Keywords: C-S-H; disordered crystals; Atomistic modelling; ReaxFF force field; semiempirical calculations, DFT
Abstract.
However, the actual structure of water in C-S-H structure is beyond the capabilities of experimental techniques.
Left C-S-H structure derived from Bonaccorsi tobermorite structure; right C-S-H structure derived from Hamid tobermorite structure.
C-S-H structures were created by randomly removing silicon atoms from bridging positions in the Bonaccorsi structure or the equivalent position in the Hamid structure.
The repository is divided by structures based on Bonaccorsi or Hamid tobermorite crystal structure.
However, the actual structure of water in C-S-H structure is beyond the capabilities of experimental techniques.
Left C-S-H structure derived from Bonaccorsi tobermorite structure; right C-S-H structure derived from Hamid tobermorite structure.
C-S-H structures were created by randomly removing silicon atoms from bridging positions in the Bonaccorsi structure or the equivalent position in the Hamid structure.
The repository is divided by structures based on Bonaccorsi or Hamid tobermorite crystal structure.
Online since: July 2011
Authors: Xiao Jing Wang, Shu Wei Wang, Zi Shu Gao, Li Lv, Hui Han, Yi Guo Su
A Theoretical Investigation on the Adsorption of CH4 onto the Surfaces of BaZrO3
Zishu Gao1,a, Yiguo Su1, Li Lv2,b, Shuwei Wang1, Hui Han1,
Xiaojing Wang1,c,∗
1College of Chemistry and Chemical Engineering, Inner Mongolia University, Huhehaote City 010021, P.
The absorption mechanism was derived by population and electronic states analysis on the basis of the electronic and surface structure calculations for BaZrO3.
The optimized structure obtained is showed in Figure 1.
Based on this optimized structure, the models for surfaces (001), (011), and (111) of BaZrO3 were set up, respectively (Figures 2-4).
The optimized structures for (001), (011), and (111) surface of BaZrO3 are shown in Figures 2-4 respectively.
The absorption mechanism was derived by population and electronic states analysis on the basis of the electronic and surface structure calculations for BaZrO3.
The optimized structure obtained is showed in Figure 1.
Based on this optimized structure, the models for surfaces (001), (011), and (111) of BaZrO3 were set up, respectively (Figures 2-4).
The optimized structures for (001), (011), and (111) surface of BaZrO3 are shown in Figures 2-4 respectively.
Online since: January 2011
Authors: Wen Li Li, Jian Jun Wang, Li Xing Dai
Heat treatment is adopted to remain the web structure of PVA and to reduce the Ag ions into Ag atoms.
This requests us to seek for the appropriate post-processing method to fix the PVA textile fiber network structure under the water condition.
In this paper, the heat treatment at 155℃ for 5min has been carried out to retain the PVA fiber network structure [6].
After the heat-treated fiber immersed in water for 3h, the network structure is still clear, as shown in Fig. 1d.
This indicates that after heat treatment, the PVA fiber network structure could be maintained in water and PVA fiber is insoluble in water.
This requests us to seek for the appropriate post-processing method to fix the PVA textile fiber network structure under the water condition.
In this paper, the heat treatment at 155℃ for 5min has been carried out to retain the PVA fiber network structure [6].
After the heat-treated fiber immersed in water for 3h, the network structure is still clear, as shown in Fig. 1d.
This indicates that after heat treatment, the PVA fiber network structure could be maintained in water and PVA fiber is insoluble in water.
Online since: May 2014
Authors: Sheng Tao Zhang, Jun Ying Yang, Xiu Li Zuo, Wen Po Li
The Effect of Acetate on the Electrodeposition of Manganese on Polycrystalline Au without SeO2 Additives
Wen-po LI1,a,*, Xiu-li ZUO2,b,Jun-ying YANG1,c and Sheng-tao ZHANG1,d
1School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China
2Department of Oil Application & Management Engineering, Logistic Engineering University, Chongqing, China
awpli@cqu.edu.cn, bzuoxiuli009@163.com, cceciliayjy@gmail.com, dstzhang@cqu.edu.cn
*Corresponding author
Keywords: Manganese, Electrodeposition, Acetate, Electrochemical Quartz Crystal Microbalance, Spectroscopic Ellipsometry.
The in situ spectroscopic ellipsometry ( SE) data were analyzed with a single-layer model ( substrate Au - deposition Mn layer) and the thicknesses of Mn layer were obtained by fitting experimental data with the model.Morphology, chemical composition and structure of the manganese deposits were analyzed by scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray diffraction (XRD).
The morphology, chemical composition, and structure of the manganese deposits were analyzed using scanning electron electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray diffraction (XRD).
Crystal structures were determined by X-ray diffraction (shimadzu,Japan,XRD-6000).
Bard (Ed.), Electroanalytical Chemistry, vol. 17,Marcel Dekker, New York, 1991, p. 1
The in situ spectroscopic ellipsometry ( SE) data were analyzed with a single-layer model ( substrate Au - deposition Mn layer) and the thicknesses of Mn layer were obtained by fitting experimental data with the model.Morphology, chemical composition and structure of the manganese deposits were analyzed by scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray diffraction (XRD).
The morphology, chemical composition, and structure of the manganese deposits were analyzed using scanning electron electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray diffraction (XRD).
Crystal structures were determined by X-ray diffraction (shimadzu,Japan,XRD-6000).
Bard (Ed.), Electroanalytical Chemistry, vol. 17,Marcel Dekker, New York, 1991, p. 1