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Online since: June 2012
Authors: Vijay Srivastava, Kanwal Preet Bhatti
There has also been discovery of new materials that show ‘multiferroic’ properties.
Now we understand how one can get the interesting multiferroic properties by tuning the lattice parameter.
One can get more information about these materials and their properties in the review article [21].
The change in lattice parameters at transformation, together with the lattice-parameter-sensitivity of electromagnetic properties, suggests that the two phases can have diverse properties.
It should be noted that the theory required to directly relate l2 to hysteresis has been worked out in some detail, and that arguments for the apparent lack of sensitivity to other factors previously considered important (e.g. volume change) have also been developed [112].
Now we understand how one can get the interesting multiferroic properties by tuning the lattice parameter.
One can get more information about these materials and their properties in the review article [21].
The change in lattice parameters at transformation, together with the lattice-parameter-sensitivity of electromagnetic properties, suggests that the two phases can have diverse properties.
It should be noted that the theory required to directly relate l2 to hysteresis has been worked out in some detail, and that arguments for the apparent lack of sensitivity to other factors previously considered important (e.g. volume change) have also been developed [112].
Online since: April 2022
Authors: Abdelkader Debab, Abdellah Benhamou, Nassima Benyoub
The main adsorption properties of mesoporous silica are high surface area, high porosity, well-structured properties, the possibility of surface modification and functionalization, and regular channel structure, such as SBA-n (SBA-3, SBA-15, SBA-16), HMS, MSU-x and M41S (MCM-41) materials[23-26].
In fact, the incorporation of APTES modifies the structural and surface properties of MCM-41.
Enhancement in amoxicillin adsorption and regeneration properties of SBA-15 after surface modification with polyaniline.
Study on thermal, mechanical and adsorption properties of amine-functionalized MCM-41/PMMA and MCM-41/PS nanocomposites prepared by ultrasonic irradiation.
Key factor affecting the basicity of mesoporous silicas MCM-41: effect of surfactant extraction time and Si/Al ratio.
In fact, the incorporation of APTES modifies the structural and surface properties of MCM-41.
Enhancement in amoxicillin adsorption and regeneration properties of SBA-15 after surface modification with polyaniline.
Study on thermal, mechanical and adsorption properties of amine-functionalized MCM-41/PMMA and MCM-41/PS nanocomposites prepared by ultrasonic irradiation.
Key factor affecting the basicity of mesoporous silicas MCM-41: effect of surfactant extraction time and Si/Al ratio.
Online since: February 2011
Authors: Jing Jing Fang, Yu Ding
The research issue of irregular surface flattening can be described as specifying and generating the meshes of an arbitrary surface and its material properties so as to be able to find the pattern contour in a plane.
These days, however, material physical properties are commonly taken into consider and iteration methods are used to find the minimum energy flattening results.
Deviation between the designed surface and the approximate mesh This is a single factor question with a known approximation threshold e.
An excessively small h may require a lot of computing time and affect the follow-up flattening procedures.
It is assumed that other forces are too small to affect the outcomes.
These days, however, material physical properties are commonly taken into consider and iteration methods are used to find the minimum energy flattening results.
Deviation between the designed surface and the approximate mesh This is a single factor question with a known approximation threshold e.
An excessively small h may require a lot of computing time and affect the follow-up flattening procedures.
It is assumed that other forces are too small to affect the outcomes.
Online since: September 2017
Authors: Rafał Leszek Abdank-Kozubski, Gilles Demange, H. Zapolsky
At
the same time, the knowledge of the microstructure is important to determine many properties of
materials (mechanical, thermal, electrical, magnetic etc.).
The size, shape and spatial arrangement of such features in the microstructure determines the physical and mechanical properties of materials.
The constants ωj(α, k) are chosen to reproduce the desirable thermodynamic and mechanical properties of the simulated atomic aggregate.
In principle, this approach can even be used to describe the 3D pattern formation by any macroscopic objects and optimization of their properties.
Elastic properties (the stiffness constants, the shear modulus and the dislocation line energy and tension) of ni al solid solutions and of the nimonic alloy pe16.
The size, shape and spatial arrangement of such features in the microstructure determines the physical and mechanical properties of materials.
The constants ωj(α, k) are chosen to reproduce the desirable thermodynamic and mechanical properties of the simulated atomic aggregate.
In principle, this approach can even be used to describe the 3D pattern formation by any macroscopic objects and optimization of their properties.
Elastic properties (the stiffness constants, the shear modulus and the dislocation line energy and tension) of ni al solid solutions and of the nimonic alloy pe16.
Online since: September 2012
Authors: Yoshinori Kobayashi
The hole size deduced from the pick-off annihilation lifetime using Eq. 10 is well correlated with the molecular packing, which plays important roles in phase transitions, transport phenomena, mechanical properties etc.
Jean, Application of positron annihilation to study the surface properties of porous resins, J.
Petzinger, Does quantum mechanical tunneling affect the validity of hole volume distributions obtained from positron annihilation lifetime measurements?
Ito, Correlation between positron annihilation and gas diffusion properties of a series of polyimides, Bull.
Faupel, Free volume and transport properties in highly selective polymer membranes, Macromolecules 35 (2002) 2071-2077
Jean, Application of positron annihilation to study the surface properties of porous resins, J.
Petzinger, Does quantum mechanical tunneling affect the validity of hole volume distributions obtained from positron annihilation lifetime measurements?
Ito, Correlation between positron annihilation and gas diffusion properties of a series of polyimides, Bull.
Faupel, Free volume and transport properties in highly selective polymer membranes, Macromolecules 35 (2002) 2071-2077
Online since: July 2014
Authors: Jean Philippe Ponthot, Gaetan Wautelet
of the projection of the slave node xS onto the master
surface and the property nM.
∆xS, (23) and then, since the contact pressure tn is proportional to the normal gap gn in the penalty method, it follows ∆tn = cn∆gn. (24) Then, the expression of the linearization of the unit normal ∆nM is quite cumbersome and depends only on the slave node position xS and the geometrical properties of the master surface.
The mesh is refined uniformly by a factor 2.
The mesh is refined uniformly by a factor 2.
The penalty coefficients are multiplied by a factor 100.
∆xS, (23) and then, since the contact pressure tn is proportional to the normal gap gn in the penalty method, it follows ∆tn = cn∆gn. (24) Then, the expression of the linearization of the unit normal ∆nM is quite cumbersome and depends only on the slave node position xS and the geometrical properties of the master surface.
The mesh is refined uniformly by a factor 2.
The mesh is refined uniformly by a factor 2.
The penalty coefficients are multiplied by a factor 100.
Online since: November 2012
Authors: N.E. Skryabina, Daniel Fruchart, Vladimir M. Pinyugzhanin
Systematic analysis of many experimental data led to question chemical, physical, mechanical parameters contributing significantly to improve the kinetics of absorption/desorption.
Besides, results of theoretical and numerical computation enlighten the impact of structural and mechanical parameters owing to the local bonds of Mg/MgH2 with of TM elements, in terms of total energy and electronic structure.
Pressure-composition-isotherms (PCI) traces as shown on Fig. 1a contain fundamentals of the thermodynamic properties of a metal hydrogen system according the analysis in terms of van’t Hoff plots as represented on Fig. 1b, where the mid-plateau pressure P is related to the atmospheric one, DH and DS are respectively the entropy and enthalpy changes at hydrogenation/ dehydrogenation (H/D), R and T are the gas constant and the absolute temperature, respectively.
In the previous approach the local crystal structure was affected only accounting for local modifications on atom species (substitution, vacancy), here we have considered potential extended modifications of structure.
However, it is pointed out here that the direct interface modifications of TM and Mg atoms should be one of most important factor to consider with a chemical effect in stabilizing better local structure that favors hydrogen diffusion.
Besides, results of theoretical and numerical computation enlighten the impact of structural and mechanical parameters owing to the local bonds of Mg/MgH2 with of TM elements, in terms of total energy and electronic structure.
Pressure-composition-isotherms (PCI) traces as shown on Fig. 1a contain fundamentals of the thermodynamic properties of a metal hydrogen system according the analysis in terms of van’t Hoff plots as represented on Fig. 1b, where the mid-plateau pressure P is related to the atmospheric one, DH and DS are respectively the entropy and enthalpy changes at hydrogenation/ dehydrogenation (H/D), R and T are the gas constant and the absolute temperature, respectively.
In the previous approach the local crystal structure was affected only accounting for local modifications on atom species (substitution, vacancy), here we have considered potential extended modifications of structure.
However, it is pointed out here that the direct interface modifications of TM and Mg atoms should be one of most important factor to consider with a chemical effect in stabilizing better local structure that favors hydrogen diffusion.
Online since: November 2008
Authors: V.M. Nadutov, Valentin A. Tatarenko, Taras M. Radchenko, Yong Bum Park, S.M. Bokoch
Nevertheless, in any case, the strain-induced interaction of impurity atoms must be taken into account
for analysis of structure and properties of f.c.c.
The interatomic-interaction energies are also necessary for calculations of the phase equilibria and phase diagrams, crystallophysical and mechanical properties of alloys [1-4].
It means that the straininduced interaction can solely not describe the thermodynamic properties of austenite.
Therefore, values of Lande's factors [59], gα, for both constituents (α = Ni, Fe) not strongly differ from 'spin value': g = 2.
Firstly, because of temperature- and concentration-dependent statistical-thermodynamic factors of correlated diffusion of the interacting atoms.
The interatomic-interaction energies are also necessary for calculations of the phase equilibria and phase diagrams, crystallophysical and mechanical properties of alloys [1-4].
It means that the straininduced interaction can solely not describe the thermodynamic properties of austenite.
Therefore, values of Lande's factors [59], gα, for both constituents (α = Ni, Fe) not strongly differ from 'spin value': g = 2.
Firstly, because of temperature- and concentration-dependent statistical-thermodynamic factors of correlated diffusion of the interacting atoms.
Online since: October 2019
Authors: Sasithorn Kongruang, Supatsara Rujanant, Woo Kul Lee
The tissue engineering goal is to create biomaterials possessing optimum structural and mechanical properties similar to bone tissue.
Furthermore, differences in the molecular weight, degree of branching, triple helical conformation and solubility may affect the binding affinity of BG to each receptor [26].
Lim, Dietary β-glucan regulates the levels of inflammatory factors, inflammatory cytokines, and immunoglobulins in interleukin-10 knockout mice, J.
Gani, Structural, thermal, functional, antioxidant & antimicrobial properties of β-D-glucan extracted from baker’s yeast (Saccharomyces cerevisiae)—Effect of β-irradiation, Carbohydr.
Furthermore, differences in the molecular weight, degree of branching, triple helical conformation and solubility may affect the binding affinity of BG to each receptor [26].
Lim, Dietary β-glucan regulates the levels of inflammatory factors, inflammatory cytokines, and immunoglobulins in interleukin-10 knockout mice, J.
Gani, Structural, thermal, functional, antioxidant & antimicrobial properties of β-D-glucan extracted from baker’s yeast (Saccharomyces cerevisiae)—Effect of β-irradiation, Carbohydr.
Online since: April 2005
Authors: Alain Barbu, Yves Limoge
The equilibrium properties
are for example frequently less well known than in metallic alloys.
Primary radiation effects and defect production Contrarily to metallic systems, in oxides both elastic and inelastic interactions can have an impact upon the defect population, creating point defects or affecting their mobility.
Ref a [4], b [5], c [6], d [7], e [8], f [9, 10] As can be seen in this table the values given for a single oxide display a very large spread, frequently by a factor up to two.
a [11 ], b [12], c [13], d [14] obtained using potential fitted on the thresholds themselves, but then the transferability to other properties is not granted.
If defect creation is an important part of the inelastic energy transfer, electronic excitations in non metals are known for a while to deeply affect defect mobility also, generally enhancing it [36].
Primary radiation effects and defect production Contrarily to metallic systems, in oxides both elastic and inelastic interactions can have an impact upon the defect population, creating point defects or affecting their mobility.
Ref a [4], b [5], c [6], d [7], e [8], f [9, 10] As can be seen in this table the values given for a single oxide display a very large spread, frequently by a factor up to two.
a [11 ], b [12], c [13], d [14] obtained using potential fitted on the thresholds themselves, but then the transferability to other properties is not granted.
If defect creation is an important part of the inelastic energy transfer, electronic excitations in non metals are known for a while to deeply affect defect mobility also, generally enhancing it [36].