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Online since: September 2010
Authors: Jeroen A. van Kan, Pei Ge Shao, Frank Watt
We present a process to fabricate Ni moulds on proton beam written (PBW) PMMA
structures.
Such structures can be realized with photo lithography using a low cost membrane mask and replication through casting.
PBW can therefore realize 3 dimensional structuring directly without further etch steps.
A thin release layer of Teflon AF 1600 has been uniformly coated on the high aspect ratio Ni structures.
Quake, Science, Vol. 298 (2002) p.580 [8] Phillips K Scott; Cheng Quan, Analytical chemistry, Vol. 77(1) (2005):p. 327
Such structures can be realized with photo lithography using a low cost membrane mask and replication through casting.
PBW can therefore realize 3 dimensional structuring directly without further etch steps.
A thin release layer of Teflon AF 1600 has been uniformly coated on the high aspect ratio Ni structures.
Quake, Science, Vol. 298 (2002) p.580 [8] Phillips K Scott; Cheng Quan, Analytical chemistry, Vol. 77(1) (2005):p. 327
Online since: August 2016
Authors: G.B. Albuquerque, S.R. Prim, Marilena Valadares Folgueras
Synthesis of Ceramic Pigment Based on Crystal Structure of Wollastonite
Folgueras, M.V.1; Albuquerque, G.
From a chemistry standpoint, pigments produce color by action of a chromofore ion, typically in the form of transition metals that selectively absorb visible radiation.
Many pigments in which nickel is employed as chromophore are based on the nickel spinel structure [8], though there are also yellow pigments based on the rutile structure [9].
The formulation calculated the structure of Ca2-xNixSi2O6, where x=0, 0.5, 1.0, 1.5 and 2.0.
Other structures will preferably be formed.
From a chemistry standpoint, pigments produce color by action of a chromofore ion, typically in the form of transition metals that selectively absorb visible radiation.
Many pigments in which nickel is employed as chromophore are based on the nickel spinel structure [8], though there are also yellow pigments based on the rutile structure [9].
The formulation calculated the structure of Ca2-xNixSi2O6, where x=0, 0.5, 1.0, 1.5 and 2.0.
Other structures will preferably be formed.
Online since: February 2019
Authors: S.F. Ivanova, Natalia N. Petrova
The morphological structure of collagen was investigated by scanning electron microscope JSM-7800F ("JEOL", Japan).
On the over hand, in the native collagen of swim bladder of white fish (Fig. 1B), no fibers structure similar to the fiber network (observed in native collagen, as in Figure 1A) was found.
Overall, the FTIR studies suggested that alkaline-salt treatment and freeze drying of materials apparently had no pronounced effect on the triple-helical structure of collagen.
Kishimura, Characteristics of collagen from the swim bladders of yellow fin tuna (Thunnus albacares), Food Chemistry 155 (2014) 264-270
Schwartz, Chemical modification of elastomers, Chemistry, Moscow, 1993.
On the over hand, in the native collagen of swim bladder of white fish (Fig. 1B), no fibers structure similar to the fiber network (observed in native collagen, as in Figure 1A) was found.
Overall, the FTIR studies suggested that alkaline-salt treatment and freeze drying of materials apparently had no pronounced effect on the triple-helical structure of collagen.
Kishimura, Characteristics of collagen from the swim bladders of yellow fin tuna (Thunnus albacares), Food Chemistry 155 (2014) 264-270
Schwartz, Chemical modification of elastomers, Chemistry, Moscow, 1993.
Online since: February 2007
Authors: Kai Hui Nan, G.X. Pei
The structure and
composition of the films have an important effect on their bio-mineralization behavior.
The elemental composition and surface chemistry was examined with energy dispersive X-ray spectrometer (EDX, Model Inca 300, oxford, U.K.).
Results and discussion Structure and components of the films formed by micro-arc oxidation of titanium.
The peaks at 906 and 850 cm -1 result from the bond stretch of [HPO4] in the structure of OCP.
The structure and composition of the films have an important effect on their bio-mineralization behavior.
The elemental composition and surface chemistry was examined with energy dispersive X-ray spectrometer (EDX, Model Inca 300, oxford, U.K.).
Results and discussion Structure and components of the films formed by micro-arc oxidation of titanium.
The peaks at 906 and 850 cm -1 result from the bond stretch of [HPO4] in the structure of OCP.
The structure and composition of the films have an important effect on their bio-mineralization behavior.
Online since: June 2014
Authors: Bei Yang, Jia Neng Guo, Jin Zhi Lin, Xin Liu, Xiang Zhang, Qi Wei Wang, Ge Gao, Hai Bo Jin, Xin Ge Shi
As more and more attention pay on environment protecting and green chemistry[21,22], requirement of more effective & more environmentally friendly catalystwas brought out.
The addition had nothing to do with structure, but reduced the reductive of activity center.
[21] Min En-ze et al.Green Chemistry and Scientific Development [J].
Chinese Chemical Society 26th Annual Conference of Chemistry and Society Forum Proceedings, 2008
Industrial & engineering chemistry research, 1998, 37(7): 2647-2653
The addition had nothing to do with structure, but reduced the reductive of activity center.
[21] Min En-ze et al.Green Chemistry and Scientific Development [J].
Chinese Chemical Society 26th Annual Conference of Chemistry and Society Forum Proceedings, 2008
Industrial & engineering chemistry research, 1998, 37(7): 2647-2653
Online since: February 2012
Authors: Chao Fu Wei, Jing Du, Fei Nan Hu
The soil-forming processes continuously distribute electrical charges and form various charge densities in different soil structures, such as aggregates, horizons, profiles, and soil sequences [28-30].
And it shows that soil has better particle size distribution and layer, reticular structure than its parent rocks.
Surface potential is an important parameter in fields such as colloid and surface chemistry, nano material, soil science, ecology, environment science, biology and chemical engineering, so it has been an important issue ever since.
J. 42, 468-472 (1978) [10] Breeuwsma, A., Lyklema, J: Journal of Colloid and Interface Science 43, 437-448 (1973) [11] Zhang, H., Zhang, X.N: Geoderma 54, 173-188 (1992) [12] Sposito, G.: The Chemistry of Soils (Oxford University Press, New York 1989) [13] Chorover, J., Amistadi, M.K: Geochim.
Colloid and Interface Sci. 275, 172-176 (2004) [26] Hou, J., Li, H., Zhu, H., Wu, L: Soil Science Society of America Journal 73, 1658-663 (2009) [27] Sparks, D.L: Soil Physical Chemistry, seconded (CRC Press, New York. 1999) [28] Glazovskaya, M.A: Soils of the world.
And it shows that soil has better particle size distribution and layer, reticular structure than its parent rocks.
Surface potential is an important parameter in fields such as colloid and surface chemistry, nano material, soil science, ecology, environment science, biology and chemical engineering, so it has been an important issue ever since.
J. 42, 468-472 (1978) [10] Breeuwsma, A., Lyklema, J: Journal of Colloid and Interface Science 43, 437-448 (1973) [11] Zhang, H., Zhang, X.N: Geoderma 54, 173-188 (1992) [12] Sposito, G.: The Chemistry of Soils (Oxford University Press, New York 1989) [13] Chorover, J., Amistadi, M.K: Geochim.
Colloid and Interface Sci. 275, 172-176 (2004) [26] Hou, J., Li, H., Zhu, H., Wu, L: Soil Science Society of America Journal 73, 1658-663 (2009) [27] Sparks, D.L: Soil Physical Chemistry, seconded (CRC Press, New York. 1999) [28] Glazovskaya, M.A: Soils of the world.
Online since: February 2016
Authors: A.S. Benosman, H. Taïbi, B. Belbachir
Taïbi1,c
1Faculty of Exact Sciences and Applied, Laboratory of Polymer Chemistry, University of Oran 1 Ahmed Benbella, BP 1524, El Mnaouer, Oran, Algeria.
2Department of Civil Engineering, Laboratory of Materials, BP 1523, ENPO, Oran, Algeria.
3Department of Chemistry, Preparatory School of Science and Technology EPST, BP 165 RP,
Bel-Horizon Tlemcen 13000, Algeria.
Introduction The sustainability of concrete structures is a very important characteristic, because it ensures increased security and longer service life for these structures [1].
Durability also guarantees considerable savings in the long term, since these structures will require little or no repair, resulting in savings of reparation costs which can be very high and may even exceed the initial construction costs [2].
The development of such structures must necessarily go through mastery and understanding of the factors that may affect their durability [3].
Komornicki, in: Key to Innovation Integrated Solution, Innovative Chemistry for Energy Efficiency of Buildings in Smart Cities.
Introduction The sustainability of concrete structures is a very important characteristic, because it ensures increased security and longer service life for these structures [1].
Durability also guarantees considerable savings in the long term, since these structures will require little or no repair, resulting in savings of reparation costs which can be very high and may even exceed the initial construction costs [2].
The development of such structures must necessarily go through mastery and understanding of the factors that may affect their durability [3].
Komornicki, in: Key to Innovation Integrated Solution, Innovative Chemistry for Energy Efficiency of Buildings in Smart Cities.
Online since: March 2011
Authors: Jian Zhang Guo, Bin Xu
The coating was characterized by Scanning Electron Microscopy (SEM) ,Energy Dispersive Spectrometer (EDS) and X-ray Diffractometer (XRD).The experimental results showed that the electroless Ni-P coating on aluminum alloy was amorphous structure, with high hardness and good corrosion resistance; the structure became crystal structure after heat treatment, and the hardness of the coating was improved, could catch HV828; the thickness of the coating was 28μm.
(a) (b) Fig.4 The XRD of coating a. before heat treatment b. after heat treatment It is confirmed that the structure of the coating before heat treatment (Fig.4a) has amorphous structure, but the coating after heat treatment (Fig.4b) has crystal structure.
(4) In the heat treatment process, the structure of the coating has been changed from amorphous to crystal; the hardness of the coating has become HV828.
Sharma: Surface & Coatings Technology, 201 (2006), p. 855 [4] Jueling Chen, Gang Yu, Bonian Hu: Surface & Coatings Technology, 201 (2006), p. 686 [5] Choji Fukuhara, Yoshiyuki Kamata, Akira Igarashi: Applied Catalysis A: General, 330 (2007), p. 108 [6] Choji Fukuharaa, Hiromichi Ohkuraa, Yoshiyuki Kamataa: Applied Catalysis A: General, 273 (2004), p. 125 [7] D.Takács, L.Sziráki, T.I.Török, J.Sólyom, Z.Gácsi, K.Gál-Solymos: Surface & Coatings Technology, 201 (2007), p. 4526 [8] Xiufang Cui, Guo Jin, Qingfen Li, Yuyun Yang, Ying Li, Fuhui Wang: Materials Chemistry and Physics, 121 (2010), p. 308 [9] Isao Shitanda, Atsushi Sato, Masayuki Itagaki, KunihiroWatanabe, Nobuyuki Koura: Electrochimica Acta, 54 (2009), p. 5889 [10] Yoram de Hazan, Dennis Werner, Markus Zgraggenc, Michael Groteklaes, Thomas Graule: Journal of Colloid and Interface Science, 328 (2008), p. 103 [11] Vishal Saxena, R.Uma Rani, A.K.
(a) (b) Fig.4 The XRD of coating a. before heat treatment b. after heat treatment It is confirmed that the structure of the coating before heat treatment (Fig.4a) has amorphous structure, but the coating after heat treatment (Fig.4b) has crystal structure.
(4) In the heat treatment process, the structure of the coating has been changed from amorphous to crystal; the hardness of the coating has become HV828.
Sharma: Surface & Coatings Technology, 201 (2006), p. 855 [4] Jueling Chen, Gang Yu, Bonian Hu: Surface & Coatings Technology, 201 (2006), p. 686 [5] Choji Fukuhara, Yoshiyuki Kamata, Akira Igarashi: Applied Catalysis A: General, 330 (2007), p. 108 [6] Choji Fukuharaa, Hiromichi Ohkuraa, Yoshiyuki Kamataa: Applied Catalysis A: General, 273 (2004), p. 125 [7] D.Takács, L.Sziráki, T.I.Török, J.Sólyom, Z.Gácsi, K.Gál-Solymos: Surface & Coatings Technology, 201 (2007), p. 4526 [8] Xiufang Cui, Guo Jin, Qingfen Li, Yuyun Yang, Ying Li, Fuhui Wang: Materials Chemistry and Physics, 121 (2010), p. 308 [9] Isao Shitanda, Atsushi Sato, Masayuki Itagaki, KunihiroWatanabe, Nobuyuki Koura: Electrochimica Acta, 54 (2009), p. 5889 [10] Yoram de Hazan, Dennis Werner, Markus Zgraggenc, Michael Groteklaes, Thomas Graule: Journal of Colloid and Interface Science, 328 (2008), p. 103 [11] Vishal Saxena, R.Uma Rani, A.K.
Online since: January 2020
Authors: Yu.A. Svinoroev, Valery V. Dyadichev, O.A. Ternovskiy
Exactly, this state of the polymer structure corresponds to the maximum binding capacity of the material.
In the classic view, the process of structure formation of lignin-containing substances goes into several series-parallel stages [21, 22].
This initial state determines the formation of large values of internal stresses in the resulting polymer structure during the curing.
Philip, An overview of the applications of furfural and its derivatives Anthonia: International Journal of Advanced Chemistry, USA: Steele Department of Sustainable Bioproducts, Mississippi State University, No 3 (2) (2015) 42-47
Baramboim, Mechanic-сhemistry of high molecular compounds: Chemistry, Moscow, 1971.
In the classic view, the process of structure formation of lignin-containing substances goes into several series-parallel stages [21, 22].
This initial state determines the formation of large values of internal stresses in the resulting polymer structure during the curing.
Philip, An overview of the applications of furfural and its derivatives Anthonia: International Journal of Advanced Chemistry, USA: Steele Department of Sustainable Bioproducts, Mississippi State University, No 3 (2) (2015) 42-47
Baramboim, Mechanic-сhemistry of high molecular compounds: Chemistry, Moscow, 1971.
Online since: September 2018
Authors: I.A. Auwalu, M.A.Y. Hotoro, U.H. Jamo, D.G. Diso
The shifting of the absorption band to the lower wavelength agreed to the decrease in non-bridging oxygen preparing the structure to be more compact.
The samples Morphological structure and optical properties of pure and doped zinc silicate were detected.
Babu, “Photoluminescence and Energy Transfer Process in Bi3+ / Sm3+ Co-Doped Phosphate Zinc Lithium Glasses,” Advances in Materials Physics and Chemistry, vol. 4, 2014, 165–171
Gerardot, “Electronic structure, optical properties, and lattice dynamics in atomically thin indium selenide flakes,” Nano Research, vol. 7, 2014, 1556–1568
Bhat, “Optical properties of samarium doped zinc-phosphate glasses,” Journal of Physics and Chemistry of Solids, vol. 68, 2007, 581–585
The samples Morphological structure and optical properties of pure and doped zinc silicate were detected.
Babu, “Photoluminescence and Energy Transfer Process in Bi3+ / Sm3+ Co-Doped Phosphate Zinc Lithium Glasses,” Advances in Materials Physics and Chemistry, vol. 4, 2014, 165–171
Gerardot, “Electronic structure, optical properties, and lattice dynamics in atomically thin indium selenide flakes,” Nano Research, vol. 7, 2014, 1556–1568
Bhat, “Optical properties of samarium doped zinc-phosphate glasses,” Journal of Physics and Chemistry of Solids, vol. 68, 2007, 581–585