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Online since: July 2011
Authors: Yan Qi Liu, Liu Zhi Yang, Yan Na Liu, Hong Li, Rei Ling Shen, Xue Hong Li
Introduction
Ultra-high pressure can change the structure of starch granules, crystalline structure, and molecular structure, and then lead to the changes of starch functionality.
Stute et al. [6] found that the 50% moisture content of potato starch at 900Mpa gelatinized imcompletely, potota starch suspension (5%) at 600Mpa for 15min didn’t affect the structure of starch granules.
The diffraction peaks intensity of waxy wheat starch and glutinous rice starch treated at 500MPa became weaker; the diffraction peaks intensity of waxy wheat starch and glutinous rice starch treated at 550MPa disappeared, some of waxy maize starch structure weren’t destroyed in Fig.2.
Compared to native potato starch after treated at 600MPa, diffraction peaks intensity at angles of 15º、19º、22ºand 24ºchanged indistinctly, became weaker with increasing the pressure of treatment, rudimentarily disappered at 750Mpa, the whole curve into a bun peak which is a typical amorphous structure diffraction curve.
Then we can judge that in experimental conditions, potota starch at 700Mpa begins to gelatinize, at approximately 750Mpa the crystal structure of granules was destroyed.
Stute et al. [6] found that the 50% moisture content of potato starch at 900Mpa gelatinized imcompletely, potota starch suspension (5%) at 600Mpa for 15min didn’t affect the structure of starch granules.
The diffraction peaks intensity of waxy wheat starch and glutinous rice starch treated at 500MPa became weaker; the diffraction peaks intensity of waxy wheat starch and glutinous rice starch treated at 550MPa disappeared, some of waxy maize starch structure weren’t destroyed in Fig.2.
Compared to native potato starch after treated at 600MPa, diffraction peaks intensity at angles of 15º、19º、22ºand 24ºchanged indistinctly, became weaker with increasing the pressure of treatment, rudimentarily disappered at 750Mpa, the whole curve into a bun peak which is a typical amorphous structure diffraction curve.
Then we can judge that in experimental conditions, potota starch at 700Mpa begins to gelatinize, at approximately 750Mpa the crystal structure of granules was destroyed.
Online since: September 2013
Authors: Xian Ming Liu, Hong Bing Yang, Xue Yi Yang
Manganese oxides with crystal structures, such as ramsdellite, and layered structure are widely applied for positive electrode in Li storage devices.
As such, Li+ insertion and extraction into this layered structure has been investigated [5,6].
It is believed that 1D nanostructures could be obtained by rolling of a lamellar structure.
Under certain conditions, a layer structure would begin to curl, and the thus-obtained tubular structure could serve as the original driving force for the growth of one-dimensional nanostructures.
The higher electro-conductivity of the nanowires arose from the long 1D structure.
As such, Li+ insertion and extraction into this layered structure has been investigated [5,6].
It is believed that 1D nanostructures could be obtained by rolling of a lamellar structure.
Under certain conditions, a layer structure would begin to curl, and the thus-obtained tubular structure could serve as the original driving force for the growth of one-dimensional nanostructures.
The higher electro-conductivity of the nanowires arose from the long 1D structure.
Online since: December 2016
Authors: Kamal Kumar Choudhary, Netram Kaurav, Shubhangi Soni, Arvind Jain
In particular, Chen et al. [8] has investigated the elastic properties and electronic structures of IrN in rocksalt and zinc blende structures by first-principles.
On the other hand, Zhao et al. [19] has calculated the structural, electronic and mechanical properties of IrN by use of the density-functional theory, among the considered six structures, i.e. rocksalt, zinc blende, CsCl, wurtzite, NiAs and wurtzite structure structures.
The authors argued that the wurtzite structure is the most stable, followed by zinc blende structure.
The test materials transform from their initial B3 to B2 structure under pressure.
[20] HR Soni, SK Gupta, PK Jha, Physica B: Condensed Matter 406 (19), 3556 (2011) [21] SK Gupta, SD Gupta, HR Soni, V Mankad, PK Jha, Materials Chemistry and Physics 143 (2), 503(2014)
On the other hand, Zhao et al. [19] has calculated the structural, electronic and mechanical properties of IrN by use of the density-functional theory, among the considered six structures, i.e. rocksalt, zinc blende, CsCl, wurtzite, NiAs and wurtzite structure structures.
The authors argued that the wurtzite structure is the most stable, followed by zinc blende structure.
The test materials transform from their initial B3 to B2 structure under pressure.
[20] HR Soni, SK Gupta, PK Jha, Physica B: Condensed Matter 406 (19), 3556 (2011) [21] SK Gupta, SD Gupta, HR Soni, V Mankad, PK Jha, Materials Chemistry and Physics 143 (2), 503(2014)
Online since: September 2014
Authors: Suriati Sufian, Noorhana Yahya, Nguyen van Thien Duc, Nurlidia Mansor
CNF structures that consist of herringbone, platelet, ribbon, or sometimes irregular structure and they have hydrophobic property.
Transmission electron microscope (TEM) was used to diagnose the graphite structure of CNF.
Results and discussion In Fig. 1, a TEM image of CNF structure is displayed.
The effect of various modifications on graphite structure of CNF surface can be seen in Raman results.
Koningsberger, Chemistry-a European Journal 8 (2002) 1151-1162
Transmission electron microscope (TEM) was used to diagnose the graphite structure of CNF.
Results and discussion In Fig. 1, a TEM image of CNF structure is displayed.
The effect of various modifications on graphite structure of CNF surface can be seen in Raman results.
Koningsberger, Chemistry-a European Journal 8 (2002) 1151-1162
Online since: July 2013
Authors: Xi Liang Chen, Yan Pei Ji, Peng Cui
Rheological and Electrical Properties of CB/HDPE Composites
CHEN Xiliang1a, CUI Peng1b, JI Yanpei1c
(1 Applied Chemistry Research Center, Yellow River Conservancy Technical Institute,
Kaifeng 475004, China)
aemail:cxliang2006@163.com, bemail: cuipenga@163.com,
cemail: 875521665@qq.com
Keywords: Carbon black, conductive properties, rhological properties
Abstract.
To the contrary, a wide enough distribution of the particles (low structure CB) results in the non-universal behavior.
In either case, the network structure will break with the strain rate field applied to the system.
Upon resting the network structure restores either partly or completely to its original state.
The deviation of G′r from the theoretical expectations at high concentrations results from the rheological percolating structure formed by the interconnected structures of the filler particles.
To the contrary, a wide enough distribution of the particles (low structure CB) results in the non-universal behavior.
In either case, the network structure will break with the strain rate field applied to the system.
Upon resting the network structure restores either partly or completely to its original state.
The deviation of G′r from the theoretical expectations at high concentrations results from the rheological percolating structure formed by the interconnected structures of the filler particles.
Online since: December 2011
Authors: Yan Qi Liu, Miao Miao Zheng, Xin Xin Xiao, Liu Zhi Yang, Yin Long Xu
Preparation and Characterization of V-type Amylose-hexanol Complex
Liu-zhi Yang1, Xin-xin Xiao2, Miao-miao Zheng3, Yin-long Xu4, Yan-qi Liu5a
1Zhengzhou University of Light Industry, Zhengzhou, China
2Zhengzhou University of Light Industry, Zhengzhou, China
3Zhengzhou University of Light Industry, Zhengzhou, China
4Zhengzhou University of Light Industry, Zhengzhou, China
5Zhengzhou University of Light Industry, Zhengzhou, China
a liuyanqi@zzuli.edu.cn
Key words: V-type amylose-hexanol complex; crystalline structure; preparation
Abstract: In this paper, B-type microcrystalline starch made a combination with hexanol in the case of water and alcohol as solvent respectively, V-type amylose-hexanol complexes were prepared.
Through comparing aqueous solvent method and alcohol solvent method to explore the influence on the crystal structure of complexes by preparation conditions and help to further understand the structure of V-type amylose-ligand complex.
Potato starch was purchased from Zhu Cheng Xing Mao CO., LTD; analytical grade anhydrous ethanol, hexanol and DMSO from HAOHUA chemistry reagent Luo Yang CO., LTD; X-ray diffractometer, Burker D8 from Burker Co., Germany; Differential scanning calorimetry, NETISCH-449C from Netisch Co., Germany; SEM, Philips XL-3 from RiLi Co., Japan.
It can be seen, the influence on the crystal structure of V-type complex by the existence of water was significant.
So, compared with aqueous solvent method, mobility, migration and helix extension of crystal structure of V-type complex obtained from alcohol solvent method were bad, causing the endothermic peak in DSC pattern was broader.
Through comparing aqueous solvent method and alcohol solvent method to explore the influence on the crystal structure of complexes by preparation conditions and help to further understand the structure of V-type amylose-ligand complex.
Potato starch was purchased from Zhu Cheng Xing Mao CO., LTD; analytical grade anhydrous ethanol, hexanol and DMSO from HAOHUA chemistry reagent Luo Yang CO., LTD; X-ray diffractometer, Burker D8 from Burker Co., Germany; Differential scanning calorimetry, NETISCH-449C from Netisch Co., Germany; SEM, Philips XL-3 from RiLi Co., Japan.
It can be seen, the influence on the crystal structure of V-type complex by the existence of water was significant.
So, compared with aqueous solvent method, mobility, migration and helix extension of crystal structure of V-type complex obtained from alcohol solvent method were bad, causing the endothermic peak in DSC pattern was broader.
Online since: January 2014
Authors: Kai Yan Zhang, Jia Lin Liu, Juo Luo, Yu Ping Chang
The experimental results showed that the products are with monoclinic SrAl2O4 crystal structure, the diameter of nanofibers is about 100nm and the size is uniformly distributed.
After measuring and analyzing its morphology, structures, compositions, excitation and emission spectrum, some meaningful results were found.
This shows that monoclinic SrAl2O4 crystal structure has been formed completely.
Materials Chemistry and Physics, 98, p. 509-513. (2006)
After measuring and analyzing its morphology, structures, compositions, excitation and emission spectrum, some meaningful results were found.
This shows that monoclinic SrAl2O4 crystal structure has been formed completely.
Materials Chemistry and Physics, 98, p. 509-513. (2006)
Online since: May 2012
Authors: Jun Peng, Yang Bing Li, Jian Wang, Rui Hua Guo, Sheng Li An, Wei Dong Zhao
So the Sm2O3 particle can refine the size of crystal grain of cast structure.
And it can also reduce the size of crystal grain of rolled structure.
It can be seen that the crystal grain size of cast structure can be reduced when adding Sm2O3 particle to steel.
of cast structure and rolled structure will reduce.
Materials Chemistry and Physics, Vol.107 (2008), p.231
And it can also reduce the size of crystal grain of rolled structure.
It can be seen that the crystal grain size of cast structure can be reduced when adding Sm2O3 particle to steel.
of cast structure and rolled structure will reduce.
Materials Chemistry and Physics, Vol.107 (2008), p.231
Online since: March 2014
Authors: Hong Qin Shao, Jun Hua Wu, Hong Ling Liu, Zheng Guan
Nanoemulsion Synthesis of Magnetic-optical CoNiAu Nanoparticles
Hongqin Shao1,a, Zheng Guan2,b, Junhua Wu3,c and Hongling Liu1*,d
1Henan Key Laboratory of Polyoxometalate, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China.
2Henan Chemical Technician College, Kaifeng, China.
3Research Institute of Engineering and Technology, Korea University, Seoul 136-713, Korea
ashaohongqinshq@126.com, bhnhggz@163.com, cfeitianshenhu@yahoo.com, d*hlliu@henu.edu.cn
Keywords: CoNiAu nanoparticles; nanoemulsion; multi-functional; magnetic-optical properties
Abstract.
The XRD and TEM analysis confirm the formation and structure of the nanoparticles.
The crystal structure of the nanoparticles was studied by XRD (X’Pert Pro), the data of 2 was collected in the range of 20-90°, while the morphology, particle size and size distribution of the nanoparticles were analyzed by TEM (JEM-2010).
The XRD and TEM analysis confirm the formation and structure of the nanoparticles.
The crystal structure of the nanoparticles was studied by XRD (X’Pert Pro), the data of 2 was collected in the range of 20-90°, while the morphology, particle size and size distribution of the nanoparticles were analyzed by TEM (JEM-2010).
Online since: March 2017
Authors: Zainal Arifin Ahmad, Maslinda Kamarudin, Wan Fahmin Faiz Wan Ali, Norazharuddin Shah Abdullah
It belong to a group of magnetic oxides with cubic structure of Ia-3d and consist of 80 atoms per unit cell [1].
The first step was geometry optimisation of the crystal structure and second step is to calculate band structure and its density of state.
The second step is to calculate the band structure and density of state (DOS) of various active plane YIG.
Fig. 1 YIG cubic structure based on ICSD card no. of 98-003-5954 at a) optimized and b) cleaved at (004), (024) and (224) planes, respectively Results and Discussion Structure Properties of Computed Lattice Parameters.
A Simulation Study, Chemistry of Materials 12 (2004) 1232–1239
The first step was geometry optimisation of the crystal structure and second step is to calculate band structure and its density of state.
The second step is to calculate the band structure and density of state (DOS) of various active plane YIG.
Fig. 1 YIG cubic structure based on ICSD card no. of 98-003-5954 at a) optimized and b) cleaved at (004), (024) and (224) planes, respectively Results and Discussion Structure Properties of Computed Lattice Parameters.
A Simulation Study, Chemistry of Materials 12 (2004) 1232–1239