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Online since: August 2011
Authors: Mary Mrad, Edmond Abi-Aad, Antoine Aboukaïs, Cédric Gennequin
The structures of the solids were analyzed by powder XRD technique at room temperature with a Bruker diffractometer using Cu Kα as radiation scanning (1.5406 Å) and 2θ angles ranging from 20 to 80° with a step size of 0.02° and a count time of 2 s.
It can be seen that fluorite type oxide structure of CeO2 (JCPDS: 00-034-0394) is observed in all samples.
The pattern of CeO2 has shown a fluorite lattice structure pattern with a lattice constant of the cubic (fcc) cell at about 5.411 Å.
Some authors [3], have reported that in a crystal structure, it is difficult to detect light atoms in the presence of heavier atoms due to weak diffraction of the former which is the case at a low ZnO load (1Zn10Ce with 4.5 wt.%).
Dean (Ed.), Lang’s Handbook of Chemistry, 23rd Edition, McGraw-Hill, New York, (1985), in press
Online since: October 2004
Authors: Matthew R. Barnett, D. Atwell, Aiden G. Beer
Magnesium has the lowest density of the structural metals (1.74 gcm-3) and is characterized by its hcp structure, within which basal slip and c-axis tension twinning are the most readily activated deformation modes.
An example of a structure partially consumed by DRX is presented in Figure 2b. 0 50 100 150 200 250 300 350 0 0.1 0.2 0.3 0.4 ε σ (MPa) 3 µm 4 µm 8 µm 11 µm 16 µm 150°C 22 µm 0 10 20 30 40 50 60 70 80 90 100 0 0.1 0.2 0.3 0.4 0.5 ε σ (MPa) 3µm 4µm 8µm 11µm 16µm uniaxial compression at 300°C a) b) Figure 1.
Discussion Although the expressions generated in the present work are only approximate they provide indication of the mechanisms that might be expected to determine the structure and the deformation behaviour for a given set of operating conditions and initial grain size.
Conclusion The operation of twinning and dynamic recrystallization in Mg-3Al-1Zn (and, it is suggested, most wrought Mg alloys) have a strong impact on the final structure and the mechanical behaviour during working.
Huang: Materials Chemistry and Physics, 81 (2003), 11-26. 7.
Online since: September 2011
Authors: Chun Peng Wang, Fu Xiang Chu, Yu Zhi Xu, Charles R. Frihart, Linda F. Lorenz, Nicole M. Stark
To have a better understanding how alteration of protein structure by chemical modification effected its performance as a wood adhesive, and acetylation of soy flour at different temperature and the succinylated were made in this study.
ATR-IR Attenuated total reflectance infrared spectroscopy (ATRIR) is an important spectroscopic tool for understanding protein structure in previous studies [12-15].
Mori, “Structure-function relationships of soy proteins.
Wescott, “Improved CARB IIcompliant soy adhesives for laminates,” Wood Adhevises, Session 3A –Resin Chemistry 2, pp. 186-194, 2009
Mori, “Effects of water activity and lipid addition on secondary structure of Zein in powder systems,” J.
Online since: January 2012
Authors: Fei Wang, Qing Guo Tang, Jian Min Zhang
Aerosols, as a kind of light porous materials, have many nanoporous structures, thus can lead to the decrease of solid and gaseous thermal conductivity.
As of today, new thermal insulation materials like nano-porous structure thermal insulation materials are emerging, but large scale and low cost production have not been reported yet, therefore the development of large scale and low cost insulation materials with nano-porous structure has promising prospects.
The development trend of thermal insulation materials was also introduced, which can be concluded that several insulation functional associative materials should be developed and be used depending on the exact circumstances and specifications, the development of large scale and low cost insulation materials with nano-porous structure has promising prospects, and the rapid evaluation and testing methods of insulation materials should be explored to apply to the research and development of thermal insulation materials.
Wang, et al.: Materials Chemistry and Physics, Vol. 130(2011), p. 466 [12] C.
Online since: October 2022
Authors: Narayan Panthi, Indra Bahadur Bhandari, Ishwar Koirala
The formation of alloy is usually related to changes in the bonding and structure of a given system.
The interaction and structural reorganization of the component atoms throughout the formation of the alloy create it totally different from crystals and therefore it becomes tough to understand the alloy in comparison to the metallic structure.
The value of geometrical structure factor is 1.061 and ratio ( Gjs,xs Gjb,xs ) is taken 0.818 [23].
Predel, Thermodynamic properties and structure of liquid alloys, Berichte der Bunsengesellschaft für physikalische Chemie.80 (8) (1976) 695-704
Boosting the potassium storage performance of alloy‐based anode materials via electrolyte salt chemistry, Adv.
Online since: October 2013
Authors: Xiang Gou, Wen Yong Liu, Lian Sheng Liu, Zi Fang Wang, Guang Yang, Jin Xiang Wu, En Yu Wang, Kai Zhang
Catalyst with activated carbon or activated carbon fiber as a support The advantages of activated carbon include the special porous structure, the large specific surface area, the high abilities of stability, adsorption and acid resistance, as well as its low cost.
Reaction conditions of some typical carbon catalysts and their catalytic activities Catalyst Reactant gas composition (%) Optimum Temperature (℃) Maximum NO conversion (%) NO NH3 O2 Balance 3%V2O5/AC[12] 0.1 0.1 10 Ar 300 90 V2O5/AC[13] 0.045 0.05 5 Ar 150 98 Cu/AC[15] 0.064 0.064 1 He 200 98 2%V2O5/AC[16] 0.04 0.045 3.9 Ar 230 97 5%V2O5/AC[17] 0.05 0.056 3.3 Ar 250 88 9%CeO2/ACFP[18] 0.1 0.1 5 Ar 180 86 9%CeO2/ACFN[18] 0.1 0.1 5 Ar 180 93 10%CeO2/ACFN[19] 0.085 0.095 3 N2 300 90 10%MnOx/ACFN[19] 0.085 0.095 3 N2 270 85 2%MnOx/AC/C[20] 0.04 0.044 3 N2 250 97 15%Mn/ACF[23] 0.02 0.02 10 N2 150 92 10%MnOx/MWCNTs[24] 0.1 0.1 5 Ar 250 96 Mn-Ce-OX/TiO2-AC[25] 0.1 0.1 0 - 175 99 Mn-Ce-OX/TiO2-CNTs[25] 0.1 0.1 0 - 125 99 V2O5/CNTs[27] 0.08 0.08 5 He 190 92 V2O5/TiO2-CNTs[28] 0.05 0.05 6 N2 300 89 V2O5-CeOX/TiO2-CNTs[32] 0.05 0.05 6 N2 250 95 Activated carbon fiber has high specific surface area and solid surface has a unique microporous structure, which makes adsorbate molecule directly get
Its hollow structure is more favorable to SCR reaction than micropore structure of activated carbon.
Wang: Journal of Fuel Chemistry and Technology, Vol.37 (2009), p583 (In Chinese) [30] S.L.
Online since: July 2014
Authors: Yong Qiang Li, Zhen Yu Shi
We modified the structure of quercetin, and got some quercetin derivatives.
HPS5 was synthesized at the Institute of Chemistry and Biology at Henan University.
Its structure is illustrated in Fig.1.
Fig.1 Chemical Structure of 3,3',4',5,7-pentahydroxyflavone 2-(3,4-dihydroxyphenyl) -3, 5, 7-trihydroxy-4H-1-benzopyran-4-one (HPS5) Materials and Methods Cell culture and Reagents PC12 cells were cultured at 37℃ in a humidified CO2 (5%) incubator with completed RPMI-1640 medium (Gibco, USA) supplemented with 12% (V/V) fresh fetal bovine serum ( Hyclone laboratory), 100 units/ml penicillin, 100 µg/ml streptomycin, (Life Technologies, Inc.).
On the other hand, by the action of over-expression the Bcl-2 family proteins and lowering expression of Bax protein to maintain the stability of the structure and function of mitochondria, play a role in preventing apoptosis, to achieve the effect of protecting PC12 cells.
Online since: October 2016
Authors: P. Mahendiran, G. Rajamurugan
Introduction Ferritic stainless steel is so named because the crystal structure of the steel is same as that of iron-Cr alloy with BCC structure.
It can be caused by impurities at the grain boundaries, enrichment of one of the alloying elements or depletion of one of these elements in the grain boundary areas are occurred when subjected to a certain temperature range called “sensitization zone” (Above 925 ⁰C) with in which the lower solubility of N in the ferrite structure, which results in the precipitation of chromium nitrides (Cr2N) in addition to chromium carbide precipitation (Cr23C26) Bin et.al [3].
J.J.Demo,”Structure constitution and general characteristics of wrought FSS” ASTM.STP 619, A Society for testing and Meterials, 9ASTM Philadelphia, 1997.”Technical data blue sheet”, S.S.-22 [8].
Joshi.A and Stein.D.F.’Chemistry of grain boundary and its relation to IGC of ASS Corrosion”.Vol.28, Sep.1972, pp.321.-16.
Online since: January 2022
Authors: Hoang Danh Pham, Dinh Nhat Do, Xuan Tien Le, Minh Tuan Le, Ngoc Phuong Nguyen, Quang Minh Bui, Xuan Cuong Luu
The hydraulic press is one of the methods of using mechanical force to break down structures of plants for oil recovery.
Moisture content was high, the structure of the material was not strong enough, easily slipping together, so when the compression occurs, the pressed fabric was torn, the Neem seed kernel was extruded through the holes in the injection cage, resulting in no oil collection.
This could be due to material structure differences.
Effect of turn of press For the number of presses, because after each pressing, the neem cake was ground again to create a new structure of bulk material, so the remaining oil in the material will be pressed to obtain more oil volume.
Rani, Chemistry of the neem tree (Azadirachta indica A.
Online since: January 2022
Authors: Lina Nunes, Sonia Duarte, Dennis Jones
Duarte4,c 1Wood Science and Engineering Division, Department of Engineering Sciences and Mathematics, Luleå University of Technology, 931 87 Skellefteå, Sweden 2DJ Timber Consultancy Limited, 15 Heol Pen Y Coed, Cimla, Neath SA11 3SP, U.K. 3Structures Department, National Laboratory for Civil Engineering, Structures Department, Av. do Brasil, 101, 1700-066 Lisbon, Portugal 4ISA, Universidade de Lisboa and LEAF- Linking Landscape, Environment, Agriculture and Food Research Centre, Tapada da Ajuda, 1349-017 Lisboa, Portugal a*Corresponding author: dennis.jones@ltu.se, blinanunes@lnec.pt, csmpduarte@gmail.com Keywords: Chemical modification, thermal modification, termites, buffers Abstract.
Of these 3,000 species, only 83 are considered to present a risk to wooden structures and furniture (Rust and Su, 2012).
As the termite hindgut is a highly structured environment, comprising micro-niches with graduated acidity and oxygen/hydrogen levels, any alteration on the pH may lead to the disruption of the hindgut chemical stability (Brune and Friedrich, 2000), resulting in changes in the termite symbiotic community.
Journal of Molecular Structure, 1200, 127133
International Journal of Quantum Chemistry, 20, 385–391