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Online since: March 2008
Authors: Felix Beckmann, René V. Martins, Norbert Schell, Hans Ulrich Ruhnau, Rüdiger Kiehn, Andreas Schreyer
Fundamental research will encompass metallurgy, physics and chemistry.
Fundamental research will encompass metallurgy, physics, chemistry, biology.
Figure 6 shows a first design for the micro-structure mapper.
Fig 6. 3D-XRD micro-structure mapper with sample-handling in the center part, shielded optics to the left (with free space shown for Kirkpatrick-Baez Multilayer mirrors or Compound Refractive Lenses) and detector space to the right.
Summary The HEMS beamline at PETRA III is optimized for the key properties of hard x-rays in the fully tunable range 30-300 keV - large penetration depth, negligible extinction and Bragg scattering, large Ewald spheres - to investigate non-destructively bulk properties or deeply buried structures mainly in the context of Materials Research, but versatile enough to allow singular experiments in the merging fields of physics, chemistry and biology.
Fundamental research will encompass metallurgy, physics, chemistry, biology.
Figure 6 shows a first design for the micro-structure mapper.
Fig 6. 3D-XRD micro-structure mapper with sample-handling in the center part, shielded optics to the left (with free space shown for Kirkpatrick-Baez Multilayer mirrors or Compound Refractive Lenses) and detector space to the right.
Summary The HEMS beamline at PETRA III is optimized for the key properties of hard x-rays in the fully tunable range 30-300 keV - large penetration depth, negligible extinction and Bragg scattering, large Ewald spheres - to investigate non-destructively bulk properties or deeply buried structures mainly in the context of Materials Research, but versatile enough to allow singular experiments in the merging fields of physics, chemistry and biology.
Online since: May 2022
Authors: Yurii Starchuk, Olha Popovych, Bogdan Rachiy, Ivan Budzulyak
The structure of NiWO4 samples was studied by X-ray diffraction (XRD) using a diffractometer with Cu–Kα radiation, λ = 1,5418 Å).
Results and Discussion The structure of NiWO4 was studied by X-ray diffraction in the range of angles 10°<2θ<70°.
Journal of Materials Chemistry. 9(2021) 1970-2017
The Journal of Physical Chemistry C. 123(2019) 30067-30076
Physics and Chemistry of Solid State. 17(2016) 575-581
Results and Discussion The structure of NiWO4 was studied by X-ray diffraction in the range of angles 10°<2θ<70°.
Journal of Materials Chemistry. 9(2021) 1970-2017
The Journal of Physical Chemistry C. 123(2019) 30067-30076
Physics and Chemistry of Solid State. 17(2016) 575-581
Online since: April 2009
Authors: Peter V. Liddicoat, Simon P. Ringer, Xiao Zhou Liao
Number density, chemistry and total solute distribution are
also shown (f-h).
The 1:1 stoichiometric ratio for Zn and Mg is reflected in the cluster chemistry, but at approximately twelve times higher concentrations than in the bulk alloy.
Combining the information on chemistry and number density, we find that 39% of the solute in the alloy is involved in atomic clustering and most of this is allocated to the modal clusters of size 8-12 atoms.
[8] Ivanisenko, Y., Valiev, R.Z. and Fecht, H.J. (2005) Grain boundary statistics in nano-structured iron produced by high pressure torsion.
[9] Maloney, S.K., et al., (1999) The chemistry of precipitates in an aged Al-2.1Zn-1.7Mg at.% alloy.
The 1:1 stoichiometric ratio for Zn and Mg is reflected in the cluster chemistry, but at approximately twelve times higher concentrations than in the bulk alloy.
Combining the information on chemistry and number density, we find that 39% of the solute in the alloy is involved in atomic clustering and most of this is allocated to the modal clusters of size 8-12 atoms.
[8] Ivanisenko, Y., Valiev, R.Z. and Fecht, H.J. (2005) Grain boundary statistics in nano-structured iron produced by high pressure torsion.
[9] Maloney, S.K., et al., (1999) The chemistry of precipitates in an aged Al-2.1Zn-1.7Mg at.% alloy.
Online since: July 2012
Authors: Guo Ping Yu, Lian Zhou Jiang, Chao Ran Dou, Yan Song, Sheng Ming An
Agricultural and Biological Chemistry, 49 1251–1256 (1985)
Food Chemistry, 107(3) 1244–1252 (2008)
Food Chemistry, 100 1071–1075 (2007)
[6] Wang, J., & Wang, L, Structures and properties of commercial maltodextrins from corn, potato and rice srarches.
Food Chemistry, 115, 1257-1267 (2009)
Food Chemistry, 107(3) 1244–1252 (2008)
Food Chemistry, 100 1071–1075 (2007)
[6] Wang, J., & Wang, L, Structures and properties of commercial maltodextrins from corn, potato and rice srarches.
Food Chemistry, 115, 1257-1267 (2009)
Online since: April 2016
Authors: Jan Koplík, Jakub Tkacz, Miroslava Smolková
Both matrices contained the structures rich in added heavy metal.
The structure in the top-right part of image contained significant content of Mn.
The similar structures occurred in the fly ash matrix with Ni.
Similar structures were formed in the BFS matrix doped with Mn.
Davidovits, Geopolymer Chemistry & Application, second ed, Geopolymer Institute, 2008
The structure in the top-right part of image contained significant content of Mn.
The similar structures occurred in the fly ash matrix with Ni.
Similar structures were formed in the BFS matrix doped with Mn.
Davidovits, Geopolymer Chemistry & Application, second ed, Geopolymer Institute, 2008
Online since: July 2012
Authors: Ze Min Chen, Pin Lu, Qiu Hong Dong
Study of Micro-arc Oxidation Process in Magnesium Surface
Ze-min Chen1, Pin Lu2, Qiu-hong Dong1
1 School of Chemistry and Material Science, Langfang Normal College, Langfang 065000, China
2 College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
E-mail:chenzemin56@163.com;lupin421@163.com
Keywords: Magnesium, Micro-arc oxidation; Potentiodynamic polarization
Abstract: This study selected sodium silicate, sodium fluoride, glycerol hydroxyl acid, potassium hydroxide and phosphine oxide (LAP) as the stabilizer electrolyte, and then on micro-arc oxidation of magnesium with constant current density.
The microstructure, corrosion resistance, chemical composition, structure and characterization of micro-arc oxidation film were determined by SEM and anodic oxidation methods.
Introduction Micro-arc oxidation was a surface treatment technology of in-situ generated a layer on the surface of magnesium ceramic film, which was increased voltage on the basis of anodic oxidation, and then magnesium formed a spark discharge on the surface, through interaction of thermochemistry, electrochemistry, interaction and plasma chemistry[1-4].
The technique was used the electrochemical method to generate a dense structure of oxide ceramic film[5].
Therefore, how to improve the structure of the oxide film had been caused the strong concerns in the majority of scholars[9-10].
The microstructure, corrosion resistance, chemical composition, structure and characterization of micro-arc oxidation film were determined by SEM and anodic oxidation methods.
Introduction Micro-arc oxidation was a surface treatment technology of in-situ generated a layer on the surface of magnesium ceramic film, which was increased voltage on the basis of anodic oxidation, and then magnesium formed a spark discharge on the surface, through interaction of thermochemistry, electrochemistry, interaction and plasma chemistry[1-4].
The technique was used the electrochemical method to generate a dense structure of oxide ceramic film[5].
Therefore, how to improve the structure of the oxide film had been caused the strong concerns in the majority of scholars[9-10].
Online since: June 2015
Authors: S.P. Soo, Mohd Sobri Idris, Rozana Aina Maulat Osman, N. Farahin, Zulkifeli Abdullah
The structure was constructed by using 3 x 3 x 1 unit cells.
This layered rock salt structure considered as a two dimensional (2-D) structure.
Kim, Challenges for Rechargeable Li Batteries, Chemistry of Materials, 22, (2010), pp. 587 – 603
Makimura, Leyered lithium Insertion Material for LiCo1/3Ni1/3Mn1/3O2 for Lithium-Ion Batteries, Chemistry Letters, 30, (2001), pp. 642 – 643
Ohzuku, Solid State Chemistry and Electrochemistry of LiCo1/3Ni1/3Mn1/3O2 for Advanced Lithium-Ion Batteries, Journal of Electrochemical Society, 154, (2007), pp.
This layered rock salt structure considered as a two dimensional (2-D) structure.
Kim, Challenges for Rechargeable Li Batteries, Chemistry of Materials, 22, (2010), pp. 587 – 603
Makimura, Leyered lithium Insertion Material for LiCo1/3Ni1/3Mn1/3O2 for Lithium-Ion Batteries, Chemistry Letters, 30, (2001), pp. 642 – 643
Ohzuku, Solid State Chemistry and Electrochemistry of LiCo1/3Ni1/3Mn1/3O2 for Advanced Lithium-Ion Batteries, Journal of Electrochemical Society, 154, (2007), pp.
Online since: November 2012
Authors: Ryo Hamai, Takeshi Toshima, Masamoto Tafu, Takaaki Masutani, Tetsuji Chohji
Brushite (DCPD, CaHPO4·2H2O) crystals are of great significance in a range of fields including biology, medicine, chemistry, and materials science.
We obtained solid-phase products with petal-like structures.
Particle structure.
The particle shape can be classified into two broad types: a two-dimensional parallelogram plate structure, and a petal-like structure.
Elliott, Structure and chemistry of the apatites and other calcium orthophosphates.
We obtained solid-phase products with petal-like structures.
Particle structure.
The particle shape can be classified into two broad types: a two-dimensional parallelogram plate structure, and a petal-like structure.
Elliott, Structure and chemistry of the apatites and other calcium orthophosphates.
Online since: January 2016
Authors: Piyarat Nimmanpipug, Waleepan Rakitikul
Degree of Esterification and Gelling Properties of Pectin Structure in
Coffee Pulp
Waleepan Rakitikul1,a and Piyarat Nimmanpipug2,b
1Faculty of Science and Technology Chiangrai Rajabhat University, Chiang Rai 57100, Thailand
2Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
aem_waleepan_r@crru.ac.th, bpiyarat.n@cmu.ac.th
Keywords: Coffee pulp, Gelation properties, Density Functional Theory
Abstract Pectin is a high value functional food ingredient widely used as a gelling agent and stabilizer.
The chemical structure of pectin has been the subject of scientific investigations for decades.
The molecular structure calculations in order predict the properties of pectin were achieved using DFT with B3LPY/3-21G (d) and singlet spin multiplicity.
These results will contribute to the proper degree of methylester in pectin polymer structure for further study.
Fig. 2 HOMO of an optimization structure Summary The results above could summary as followed.
The chemical structure of pectin has been the subject of scientific investigations for decades.
The molecular structure calculations in order predict the properties of pectin were achieved using DFT with B3LPY/3-21G (d) and singlet spin multiplicity.
These results will contribute to the proper degree of methylester in pectin polymer structure for further study.
Fig. 2 HOMO of an optimization structure Summary The results above could summary as followed.