6š influence of cement on properties of c

... has influenced on the crystallization, magnetic properties and magnetocaloric effect of the ribbons The increase of cooling rate leads to increasing crystallization activation energy and crystallization ... Vu, N Chau, Influence of Cr substituted for Fe on structure, crystallization and magnetic properties of Fe78-xCrxSi4Nb5B12Ag1 ribbons, Proceedings of the fifth National Solid state Physics Conference, ... structure of amorphous ribbons is high As we well know, TC of the ferromagnetic material 40 m /s depends on exchange interaction and coordination number Exchange interaction depends on electron...

Ngày tải lên: 05/03/2014, 14:20

... interaction effects are captured In this paper, we not consider the Kondo effect Thus, the truncation up to the second order of U can be acceptable (if the Kondo effect is expected to include, ... level, one electron from the ring should jump into the dot Conclusion In conclusion, we obtained the current expression as a function of the intradot Coulomb interaction and the AB phase The AB oscillations ... provides clues to understanding the electronic properties of a variety of materials where the interactions between electrons are particularly strong The Kondo effect only occurs when the defects are...

Ngày tải lên: 05/03/2014, 14:20

... gas chromatography The determination of deconvolutions was calculated by using Origin software Results and discussion 3.1 Characterization of carbon supports Carbon materials proposed as catalyst ... of platinum particles This effect was more significant in catalysts supported on oxidized CMK-3 carbons due to their higher content of oxygen groups (Fig 8c) Conclusions Carbon nanofibers and ordered ... mesoporous carbons have been proposed as alternative supports that could replace carbon blacks in the preparation of commercial electrocatalysts for lowtemperature fuel cells The use of these non-conventional...

Ngày tải lên: 23/04/2014, 22:47

... increase of resistivity because of the decrease of carrier concentration and Hall mobility The refractive indices and extinction coefficients were changed depending upon process conditions such as ... 300 8C was lowest for vacuum condition Consequently, vacuum was the best for low resistivity at 300 8C 3.4 Optical properties The indices of refraction (n) and extinction coefficients (k) of IZO ... n-type conduction is due to free electrons from oxygen vacancies Moreover, they reported that electrical conductivity decreased as the temperature increased, which is typical of degenerate semiconductor...

Ngày tải lên: 24/05/2014, 13:53

... electronic and optoelectronic devices Its excellent properties combined with the easiness of growing it in the nanostructure form have made it one of the most attractive and versatile semiconductor ... irradiation with moderate fluences Conclusion In summary, the influence of He+ ion irradiation on the optical properties of ZnO nanorods has been investigated as a possible candidate for space applications ... Wendler E: Electrical characterization of He+ irradiated n-ZnO Physica Status Solidi (b) 2007, 244:1544–1548 [20] Fang T-H, Chang W-J, Water W, and Lee C- C Effect of gas concentration on structural...

Ngày tải lên: 18/06/2014, 22:20

... Muscle activity and co-activation in subject #8 Muscle activity and co-activation in subject #8 The antithetic behaviour of subject #8 for muscles activity (Fig 6B), and for muscles co-activation ... significant effects of ABF on Acc-RMS (p = 0.0009) AccRMS was reduced by ABF across all subjects, as shown in Table (last column) Average reduction of Acc-RMS was 17.2% (Figure 2) Columns and of ... Effect of2 Effect of ABF on sway The percent change of using ABF on the sway parameters is shown COP-RMS and F95% were extracted from the AP COP displacement according to [24] Acc-RMS was extracted...

Ngày tải lên: 19/06/2014, 10:20

... electronic and optoelectronic devices Its excellent properties combined with the easiness of growing it in the nanostructure form have made it one of the most attractive and versatile semiconductor ... irradiation with moderate fluences Conclusion In summary, the influence of He+ ion irradiation on the optical properties of ZnO nanorods has been investigated as a possible candidate for space applications ... Wendler E: Electrical characterization of He+ irradiated n-ZnO Physica Status Solidi (b) 2007, 244:1544–1548 [20] Fang T-H, Chang W-J, Water W, and Lee C- C Effect of gas concentration on structural...

Ngày tải lên: 20/06/2014, 04:20

... Authors’ contributions DR carried out the study of influence of structure of nanoparticles in aggregates and drafted the manuscript JŠ contributed to conception of the study and to interpretation of ... magnetic forces on aggregation of zero-valent iron nanoparticles Nanoscale Res Lett 2010 Votrubík V: Theory of the Electromagnetic Field, [in Czech] Praha: Czechoslovak Academy of Science Publication; ... JE, Pecher K, Wang C, Linehan JC, Matson DW, Penn RL, Driessen MD: Characterization and properties of metallic iron nanoparticles: spectroscopy, electrochemistry and kinetics Environ Sci Technol...

Ngày tải lên: 20/06/2014, 22:20

... Authors’ contributions DR carried out the study of influence of structure of nanoparticles in aggregates and drafted the manuscript JŠ contributed to conception of the study and to interpretation of ... magnetic forces on aggregation of zero-valent iron nanoparticles Nanoscale Res Lett 2010 Votrubík V: Theory of the Electromagnetic Field, [in Czech] Praha: Czechoslovak Academy of Science Publication; ... JE, Pecher K, Wang C, Linehan JC, Matson DW, Penn RL, Driessen MD: Characterization and properties of metallic iron nanoparticles: spectroscopy, electrochemistry and kinetics Environ Sci Technol...

Ngày tải lên: 21/06/2014, 00:20

... Abbreviations CNT: carbon nanotubes; CAS: chemical abstract service; SEM: scanning electron microscopy; VGCNF: vapor-grown carbon nanofibers Acknowledgements Foundation for Science and Technology, ... dispersion method on the overall electrical properties of a VGCNF/ epoxy composite Four methods were used for the VGCNF dispersion, and the conductivity and dielectric constant of each composite ... dispersion concepts can be found in [3] Figure shows the AC conductivity at kHz (left) and the DC conductivity (right) for different volume fractions Depending on the method of composite preparation,...

Ngày tải lên: 21/06/2014, 03:20

... problem of the influence of surfaces on charge transport in semiconductor nanosystems Background The influence of the surface condition on silicon nanomembrane conductivity has been dramatically ... re-oxidation kinetics Conclusions Semiconductor nanomembranes offer an excellent platform to investigate small changes in surface chemical and structural differences, if appropriate electronic transport ... highly sensitive and selective detection of biological and chemical species Science 2001, 293:1289-1292 Nikolaides MG, Rauschenbach S, Bausch AR: Characterization of a siliconon-insulator based thin...

Ngày tải lên: 21/06/2014, 03:20

... perpendicular magnetic field, the motion of electrons along cyclotron orbits acquires zerodimensional character and, as a result, electrons fill discrete Landau levels [11] In semiconductor quantum ... question about convergency of such calculations upon increasing a number of involved Landau levels have been raised We performed calculations of magnetoexciton energies at rest with taking into account ... Magnetoplasmons Magnetoplasmons are collective excitations of electron gas in magnetic field, occurring as poles of density-todensity response function In the random phase approximation, dispersion of...

Ngày tải lên: 22/06/2014, 00:20

... evolution of one criterion respect to temperature seems that the softening phenomenon is not completed at 80 C Regarding the experimental conditions, the drastic change of mechanical properties can ... of species on one criterion: ER measured from compression tests Figure presents the evolution of ER in function of temperature for each wood species C Tg ( C) sd Dq ( C) sd C0 /C1 sd Radial compression ... the choice of these wood species is not neutral Actually, it exists a relation between basic density and lignin percentage of these species, so we can not conclude about influence of chemical composition...

Ngày tải lên: 08/08/2014, 01:21

... an ecosystem-specific approach to study the influence of DW on soils The experimental approach adopted was a comparative analysis of paired pedons with each pair consisting of pedon with accumulation ... vegetation 3) High concentrations of lipids, humic acids and fulvic acids are the forest floor constituents responsible for eluviation and illuviation 4) The spatial pattern of DW on a site corresponds ... that of understory vegetation and humus form and accounts for much of the variation in the chemical properties of the surface mineral soil CONCLUSION wood to have affected Decaying appeared properties...

Ngày tải lên: 08/08/2014, 19:21

... curves C2 S di-calcium silicate 2CaO.SiO2 C3 A tri-calcium aluminate 3CaO.Al2O3 C3 S tri-calcium silicate 3CaO.SiO2 C4 AF tetra-calcium aluminoferrite 4CaO.Al2O3.Fe2O3 CH calcium hydroxide Ca(OH)2 C- S-H ... weight by cement (swbc) Classification Common Name Typical Dosage#, % Increase in Slump, mm ASTM Specification C4 94 C4 94, C1 017 Table 1-2 Classification of WRAs According to ASTM C4 94 Type of WRA ... summary, cement hydration is a complicated process that includes a number of exothermic chemical reactions The characteristics of the heat of hydration are unique for each concrete mix under each environmental...

Ngày tải lên: 05/10/2015, 19:03

... Applications Physical properties of interest to materials science among perovskites include superconductivity, magnetoresistance, ionic conductivity, and a multitude of dielectric properties, which ... of A cations, B cations or both are reduced Tilting of the BO6 octahedra reduces the coordination of an undersized A cation from 12 to as low as Conversely, off-centering of an undersized B cation ... Magnetocaloric effect 1.1.1 Concept of magnetocaloric effect The magnetocaloric effect (MCE) [2] is a magneto thermodynamic phenomenon in which a temperature change of a suitable material is caused...

Ngày tải lên: 24/06/2016, 12:58

... rates of acetone removal (WAc ) and CO2 accumulation (WCO2 ) became less In the other words the higher AC content corresponded to higher adsorption capacity and lower photocatalytic activity Acetone ... Kinetics in the static reactor Water, CO2 and CO were detected as products of cyclohexane PCO Final concentration of evolved CO in the static reactor was about 60–80 ppm whereas the final CO2 concentration ... characteristic of photocatalytic process is the time of maximum contaminant level (MCL) establishment (tMCL ) in static conditions According to Russian sanitary regulations the cyclohexane MCL...

Ngày tải lên: 26/07/2017, 09:38

... interaction of a bone graft substitute with the host tissue under normobaric conditions may not be indicative of the similar process under hyperbaric environment Conclusion HBOT has led to an increase ... intracellular components of the periosteum with no apparent clinical signs of inflammation or infection In contrast, the β-TCP particles had acceptable integration with periosteal cells These interesting ... material had came in contact with the periosteum and the periosteal cells had cytoplasmic process protruded through the bone graft On the contrary, the ultrastructural investigation of CPCBB groups...

Ngày tải lên: 25/10/2012, 11:15

... was calculated Due to the low concentration of drug in each phase, the partition coefficients of each drug in the absence and presence of CDs could be estimated by the ratio of the drug concentration ... pathological conditions, continuous release of prostaglandins usually contributes to certain physiological functions in both humans and animals These include inhibition of gastric acid secretion, ... tion, reduction of gastric glutathione, and local production of free radicals [15,16] Table Effect of β-CD and HP-β-CD on indomethacin and piroxicam induced ulcers Treatment HP-β-CD alone provide...

Ngày tải lên: 26/10/2012, 08:57

... with a fluorescein isothiocyanate (FITC) conjugate, clone L243 (Becton Dickinson, UK) and with a mouse IgG anti-human CD14 R-phycoerythrin conjugate (R-PE), clone M5E2, (Becton Dickinson, UK) to ... for activating monocytes and restoring functional indicators is granulocyte macrophage colony stimulating factor (GM-CSF) GM-CSF is a 22-kDa glycoprotein cytokine secreted by mononuclear leukocytes ... lymphocytes ex vivo has been shown to restore function in anergic monocytes [2] It has been shown that GM-CSF induces monocyte activation [17] and can protect monocytes from becoming apoptotic [2]...

Ngày tải lên: 03/11/2012, 09:57