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Online since: April 2012
Authors: P. Jaiturong, Jakkapan Sirithunyalug, Krit Sutjarittangtham, Sukum Eitssayeam
The Electrospinning technique did not change the chemical structure of GRS based on an FT-IR evaluation.
The structure of amylopectin is glucose polymer that has a branch chain at 25-30 glucose residues.
These structures of electrospun starch showed the increase of surface area.
The FT-IR spectra (Fig.3) showed that ordered structures of starch can be seen with a maximum absorbance at 1149 cm-1 and 1077 cm-1.
The nanofibers had an intensity of 1022 cm-1 which may occur from the preparation of solution when heat was applied at 80°C; pattern changes of the amorphous structure of starch occured.
The structure of amylopectin is glucose polymer that has a branch chain at 25-30 glucose residues.
These structures of electrospun starch showed the increase of surface area.
The FT-IR spectra (Fig.3) showed that ordered structures of starch can be seen with a maximum absorbance at 1149 cm-1 and 1077 cm-1.
The nanofibers had an intensity of 1022 cm-1 which may occur from the preparation of solution when heat was applied at 80°C; pattern changes of the amorphous structure of starch occured.
Online since: January 2013
Authors: Ratno Nuryadi
It can be seen that the spring constant and effective mass of the microcantilever change when the structure is changed even the size is same.
Introduction In last ten years, a microcantilever has become the attractive sensor, because in addition to use of inter-atomic force sensor in atomic force microscope, it can be applied for a variety of sensor fields such as medicine, chemistry, environment and biology [1-3].
The structure of I-shaped microcantilever can be shown in Fig. 1.
It can be seen that the structure is rectangular shape with the end of the microcantilever is clamped and the other one is free.
The structure of the V-shaped microcantilever is shown in Fig. 3.
Introduction In last ten years, a microcantilever has become the attractive sensor, because in addition to use of inter-atomic force sensor in atomic force microscope, it can be applied for a variety of sensor fields such as medicine, chemistry, environment and biology [1-3].
The structure of I-shaped microcantilever can be shown in Fig. 1.
It can be seen that the structure is rectangular shape with the end of the microcantilever is clamped and the other one is free.
The structure of the V-shaped microcantilever is shown in Fig. 3.
Online since: November 2013
Authors: Firdaus Che Mat, Mohamad Rusop, Lyly Nyl Ismail, Raudah Abu Bakar, Mohammad Syafiq Rashidi, Habibah Zulkefle
Fig. 1 shows the test structure of deposited multilayer films with gold (Au) as the electrode.
Test structure for nanostructured ZnO/MgO films Films Characterizations.
Variation in relative permittivity value obtained was close related with the structure changes of the deposited film with immersion duration.
This is due to the space charge polarization occurred because of inhomogenieties in the structure.
Potter, A novel method for the synthesis of the ternary thin film semiconductor cadmium zinc sulfide from acidic chemical baths, Journal of Materials Chemistry 10 (2000) 2439-2441
Test structure for nanostructured ZnO/MgO films Films Characterizations.
Variation in relative permittivity value obtained was close related with the structure changes of the deposited film with immersion duration.
This is due to the space charge polarization occurred because of inhomogenieties in the structure.
Potter, A novel method for the synthesis of the ternary thin film semiconductor cadmium zinc sulfide from acidic chemical baths, Journal of Materials Chemistry 10 (2000) 2439-2441
Online since: April 2021
Authors: Mohammed A. Khattab, Heba A. El-Deeb, Azza El-Maghraby
b
a
Fig. 11: SEM images of CNTs prepared on silica supported catalyst a-5% Fe, b- 10% Fe.
3.4 TEM characterization
TEM analysis of the as-synthesized carbon deposit using various alumina catalysts revealed the presence of both graphitic structures with a central channel (CNTs) and a non-graphitic structures (amorphous carbonaceous structures) Fig. 12-13.
Kauppinen, Morphology and structure of carbon nanotubes synthesized on iron catalyst in the presence of carbon mono oxide.
Journal of Natural Gas Chemistry. 21(6) (2012) 620–624
Zhang, Effect of fuel structure on synthesis of carbon nanotubes in diffusion flames.
The Journal of Physical Chemistry B. 108(11) (2004) 3469–3473.
Kauppinen, Morphology and structure of carbon nanotubes synthesized on iron catalyst in the presence of carbon mono oxide.
Journal of Natural Gas Chemistry. 21(6) (2012) 620–624
Zhang, Effect of fuel structure on synthesis of carbon nanotubes in diffusion flames.
The Journal of Physical Chemistry B. 108(11) (2004) 3469–3473.
Online since: October 2015
Authors: Hasan Zuhudi Abdullah, Maizlinda Izwana Idris, M.A.A. Wahab, Kwok Joon Tan, Sahkila Mahmod
A structure transformation accompanied by significant grain growth were observed as temperature increased from 400oC to 800oC.
These network structures are most probably sodium titanate hydrogel, as reported by many studies [1,2].
When heating temperature reached 700oC, pore network started to shrink, showing sign of structure transformation.
A completely different surface morphology was observed at 800oC when pore network structure transformed into needle-like structure.
Kizuki, Development of bioactive materials based on surface chemistry, J.
These network structures are most probably sodium titanate hydrogel, as reported by many studies [1,2].
When heating temperature reached 700oC, pore network started to shrink, showing sign of structure transformation.
A completely different surface morphology was observed at 800oC when pore network structure transformed into needle-like structure.
Kizuki, Development of bioactive materials based on surface chemistry, J.
Online since: May 2012
Authors: Li Wei Mi, Wei Hua Chen, Jian Min Zhang, Shao Li, Juan Juan Zhao, Chang Chun Yang, Qiu Zhi Shi
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P.
The results indicate that more ethanol used in this work is effective to modify the surface structure of materials leading to better electrochemical properties.
Mixed metal oxides with layered structure present high capacity have been highlighted as cathode materials, in which, the Ni-rich layer-structured cathode materials, [2,3] such as LiNi0.8Co0.1MnO2, are good candidates for the new generation of Li-ion batteries, especially as power sources for EV and HEV applications, [4-6] because of their high energy-density and low cost.
It should be attributed to the structure differences of them.
Here, more ethanol used in this work is effective to modify the surface structure of materials leading to better electrochemical properties.
The results indicate that more ethanol used in this work is effective to modify the surface structure of materials leading to better electrochemical properties.
Mixed metal oxides with layered structure present high capacity have been highlighted as cathode materials, in which, the Ni-rich layer-structured cathode materials, [2,3] such as LiNi0.8Co0.1MnO2, are good candidates for the new generation of Li-ion batteries, especially as power sources for EV and HEV applications, [4-6] because of their high energy-density and low cost.
It should be attributed to the structure differences of them.
Here, more ethanol used in this work is effective to modify the surface structure of materials leading to better electrochemical properties.
Online since: June 2010
Authors: Duangdao Aht-Ong, Duangduen Atong, Viboon Sricharoenchaikul, Kaew Saetiaw
Regarding their chemical structure, ortho phthalic polyester started to degrade at lower temperature
(260-280°C) than iso phthalic and vinyl ester (300-350°C).
The chemical structure of three types of unsaturated polyester composites used are presented in Fig. 1.
The thermograms also indicated that the thermal stability behavior of these polyester matrices was different due to the effect of their chemical structure.
Their activation energy values were varied in the range of 168-176 KJ/mol corresponded with their chemical structure.
Walczak: Kinetics of Thermal Decomposition of Unsaturated Polyester Resins with Reduced Flammability (Industrial Chemistry Research Institute, Poland 2000).
The chemical structure of three types of unsaturated polyester composites used are presented in Fig. 1.
The thermograms also indicated that the thermal stability behavior of these polyester matrices was different due to the effect of their chemical structure.
Their activation energy values were varied in the range of 168-176 KJ/mol corresponded with their chemical structure.
Walczak: Kinetics of Thermal Decomposition of Unsaturated Polyester Resins with Reduced Flammability (Industrial Chemistry Research Institute, Poland 2000).
Online since: November 2011
Authors: Xian Yong Wei, Yuan Bao Sun, Yuan Li Zhao, Ying Zong
The components and structure features of CS2/THF soluble factions were analyzed by FTIR and GC/MS.
Introduction It is a premise of revealing the composition and structure of coals from the molecular level in efficient and clean use of coals [1,2].
They were recorded as F1, F2, F3, F4 and F5 and the composition and structure of them were analyzed with FTIR and GC/MS.
We can know that there may be cycloheptanone or other compounds containing this structure from the absorption peak near 1705 cm-1.
Wei: Relationship between molecular coal chemistry and directional conversion of coal derivatives.
Introduction It is a premise of revealing the composition and structure of coals from the molecular level in efficient and clean use of coals [1,2].
They were recorded as F1, F2, F3, F4 and F5 and the composition and structure of them were analyzed with FTIR and GC/MS.
We can know that there may be cycloheptanone or other compounds containing this structure from the absorption peak near 1705 cm-1.
Wei: Relationship between molecular coal chemistry and directional conversion of coal derivatives.
Online since: September 2013
Authors: Ye Tian, Xin Li, Nan Guo Jin, Xian Yu Jin
This investigation provides an experimental foundation for the durability design and service life assessment of concrete structures.
Physical structure of hardened cement paste: a classical approach[J].
Materials and Structures,1989,19(6):423-436
Relationships between permeability and pore structure of hardened cement paste[J].Magazine of Concrete Research,1981,33(116):139-146
Surface physics and chemistry.
Physical structure of hardened cement paste: a classical approach[J].
Materials and Structures,1989,19(6):423-436
Relationships between permeability and pore structure of hardened cement paste[J].Magazine of Concrete Research,1981,33(116):139-146
Surface physics and chemistry.
Online since: June 2014
Authors: Bao Juan Tian, Jun Gang Gao, Chao Wang
The structure and thermal properties of emulsion and latex film were characterized through a variety of analysis methods.
USA) was used for the determination of the components of the V-POSS and the detailed structure.
Results and discussion Structure characterization of V-POSS and V-POSS/PMA.
The higher Tp, the higher Tg is, which depend on the molecular chain structure, cross-linking degree and material morphology [9].
Schiraldi, Structure Property Relationships and the Role of Processing in the Reinforcement of Nylon 6-POSS Blends, Macromol. 45 (2012) 4650 – 4657
USA) was used for the determination of the components of the V-POSS and the detailed structure.
Results and discussion Structure characterization of V-POSS and V-POSS/PMA.
The higher Tp, the higher Tg is, which depend on the molecular chain structure, cross-linking degree and material morphology [9].
Schiraldi, Structure Property Relationships and the Role of Processing in the Reinforcement of Nylon 6-POSS Blends, Macromol. 45 (2012) 4650 – 4657