properties and characteristics of waxes
Tài liệu Báo cáo " Preparation and characteristics of LiF:Mg,Cu,Na,Si thermoluminescent material " pptx
Ngày tải lên :
13/02/2014, 04:20
... Journal of Science, Mathematics - Physics 23 (2007) 225-231 In the present work, we prepared LiF powders activated with Mg, Cu, Na and Si and studied the dependence of the glow curve and the ... as a single dopant and its concentration was calculated as total of Na and Si because the compound Na2 SiO3.9H2 O was added) The X-ray diffraction (XRD) patterns of four kinds of the above mentioned ... appears at 247 o C and the other small peaks are at 150, 205, and 280 o C Comparing the glow curves shown in Fig 2, one can note that the ratio of the height of the main peak to that of the other small...
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The Geographic Distribution and Characteristics of U.S. Bank Failures, 2007-2010: Do Bank Failures Still Reflect Local Economic Conditions? pptx
Ngày tải lên :
06/03/2014, 10:20
... agricultural incomes and caused the failure of thousands of banks located in farm states and other rural areas States where farm land values and cultivated acreage had expanded the most during ... Bureau of Labor Statistics Bureau of Economic Analysis Bureau of Economic Analysis Administrative Office of the United States Courts; Bureau of Labor Statistics Quarterly Census of Employment and ... consolidation of the U.S banking industry and the advent of banks with interstate branches The largest U.S banks operate thousands of branch offices across several states For example, as of June 30,...
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synthesis and characteristics of fe3+-doped sno2 nanoparticles via
Ngày tải lên :
20/03/2014, 13:08
... compare the effect of temperature on the nanoparticle properties, both the SGC and SGH series of samples were calcined at 350, 600, and 800 ◦ C in air for h 2.2 Characterization of samples The crystalline ... grain size of 10% Fe3+ - Fig XRD patterns of Fe3+ -doped SnO2 nanoparticles: (a) SGC series and (b) SGH series pound Because of the interference of Fe3+ with SnO2 lattice, the crystallinity of the ... 259.8 L.M Fang et al / Journal of Alloys and Compounds 454 (2008) 261–267 265 Fig Bright field TEM and HRTEM micrographs of samples: (a) SGH1, (b) SGH5, and (c and d) SGH15 SnO2 nanoparticles...
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Báo cáo Y học: The sodium pump Its molecular properties and mechanics of ion transport potx
Ngày tải lên :
24/03/2014, 00:21
... or K+ ions A number of isoforms of the a and b subunits has been isolated from various tissues of numerous species, and it has been repeatedly demonstrated that the function of Na+/ K+-ATPase requires ... groups of Val304, Ala305, and Ile307 (M4) and through the side-chain oxygen atoms of Asn796 and Asp800 (M6) and Glu309 (M4) [26] A similar situation could be assumed for the coordination of cations ... distributed isoform, there is the b2 isoform that is found in excitable tissues (muscle and nervous tissue), the b3 in testes, adrenal, and brain, and the bm in skeletal and heart muscle In view of the...
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Báo cáo Y học: Isolation, enzymatic properties, and mode of action of an exo-1,3-b-glucanase from Trichoderma viride doc
Ngày tải lên :
24/03/2014, 04:21
... hydrolysis of 1,3-b-oligoglucosides, the subsite theory of Hiromi [46,47] was employed for construction of a subsite map for the estimation of affinities and number of subsites in the active center of ... Km and Vmax for hydrolysis of G6G are similar to those of G3G (Tables and 4) Therefore, it may be assumed that the enzyme has a mixed mode of action towards laminarins and that it is capable of ... purity of b-oligoglucosides was analyzed by TLC and 1H and 13C NMR spectroscopy as described below Published values for 1H and 13C chemical shifts of b-oligosaccharides with different DP and linkage...
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báo cáo hóa học:" Birth weight and characteristics of endothelial and smooth muscle cell cultures from human umbilical cord vessels" docx
Ngày tải lên :
18/06/2014, 15:20
... impact of the fetal milieu The UC is an exceptional source of vascular cells, which can offer valuable information about the cellular characteristics of the blood vessels of the individual and their ... (excitation and emission filters of 530 and 616 nm, respectively) A standard cell suspension of every cell type was prepared in DPBS and kept at -80°C until use The growth fraction of exponentially ... Illinois, USA) and GraphPad Statmate 2.0 (GraphPad Software, La Jolla, California, USA) softwares Results Characteristics of the study population Table shows the general characteristics of the study...
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báo cáo hóa học: " The relationship between anxiety, coping strategies and characteristics of patients with diabetes" docx
Ngày tải lên :
18/06/2014, 19:20
... http://www.hqlo.com/content/6/1/79 Table 2: Means and standard deviations of trait anxiety and coping strategies of the participants of two types of diabetes (n = 161) Type I Diabetes (n = 39) Type ... Coefficients of correlations between age, type of diabetes and duration of diabetes, gender, educational status and monthly income were significant, whereas the correlations between type of diabetes and ... with type II diabetes, because of the highly demanding and challenging regimen of diabetes and insulin dependency Coping theorists often emphasize the benefits of problem focused coping, such...
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Properties and Applications of Silicon Carbide Part 1 pdf
Ngày tải lên :
20/06/2014, 04:20
... by Use of Nickel and Tantalum from a Materials Science Point of View 171 Yu Cao and Lars Nyborg Other applications: Electrical, Structural and Biomedical 195 Properties and Applications of Ceramic ... Properties and Applications of Silicon Carbide Illumination of the samples with interband light of wavelength 365 nm gives rise to trapping of non-equilibrium charge carriers into the donor and ... the PVT method at the Cree Research Inc and Bandgap Technologies Inc., respectively, by EPR and photo-EPR methods The nature of PR of the photo-response and of PPC in HPSI 4H-SiC material was studied...
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Properties and Applications of Silicon Carbide Part 2 pptx
Ngày tải lên :
20/06/2014, 04:20
... instant of time The value of the first derivative was calculated as the right-hand side of rate equations (3), and that of the second derivative, as the derivative of the righthand side of Eqs ... the charge states of ISi and IC in 4H-SiC are the same as those in 3C-SiC, the ranges of m and n in Eqs (1a) and (2a) are limited to m ∈ {0, 1, 2, 3, and 4} and n ∈ {0, ±1, and ±2} Boron diffusion ... randomly scattered and channeled components of the profile, and D1 and D2 are the doses represented by each Pearson function For Pearson IV functions, K1 and K2 are normalized constants Rp1 and...
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Properties and Applications of Silicon Carbide Part 3 doc
Ngày tải lên :
20/06/2014, 04:20
... involves first Step (A) and then the repetition of Steps (B) and (C) Figure is the process for low temperature deposition and evaluation of the film, consisting of Steps (A), (D) and (E) Step (D) is ... mechanism of SiC by comparing it with that of Si 78 Properties and Applications of Silicon Carbide Experimental procedure ¯ 4H-SiC (0001) C-face and (0001) Si-face epitaxial layers with 8◦ off-angles ... reported by Liu and Sturm (Liu and Sturm, 1997) The gas concentrations of monomethylsilane and hydrogen chloride are 2.5% and 5%, respectively, in hydrogen gas at the flow rate of slm In Figure...
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Properties and Applications of Silicon Carbide Part 4 pot
Ngày tải lên :
20/06/2014, 04:20
... a family of III-nitrides and ZnO, had spun a great deal of interest to magnetic properties of these materials The resulting 90 Properties and Applications of Silicon Carbide flurry of activities ... FM- and AFM-ordered supercells containing a pair of TM 104 Properties and Applications of Silicon Carbide atoms This is the amount of energy needed to flip the spin of one of these atoms and ... directions of their magnetic moments (a) (b) (c) Fig Supercells of TM-doped (a) 3C-SiC and (b) 4H-SiC, and (c) in-plane TM atom placement used in the calculations of magnetic moments and properties of...
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Properties and Applications of Silicon Carbide Part 5 docx
Ngày tải lên :
20/06/2014, 04:20
... features of the equation of state of solids J Phys.: Condens Matter, 1, pp 1941-1963 Wang, W.; Takano, F.; Akinaga, H & Ofuchi, H (2007) Structural, magnetic, and magnetotransport properties of Mn-Si ... and S , i.e μ+ (s j ) μ (s j ) The h h (2) (2) magnitude H0 is the Hankel function of the zeroth order and of the second kind, H1 is SiC SiC the Hankel function of the first order and of ... (a) (b) Fig Dispersion characteristics of the main mode and the first higher mode of the rectangular SiC waveguide: (a) dependence of the phase constants and (b) dependence of the attenuation constants...
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Properties and Applications of Silicon Carbide Part 6 ppt
Ngày tải lên :
20/06/2014, 04:20
... characterization of chemical and biological agents and materials, remote and standoff early-warning for chemicalbiological warfare threats, and imaging of concealed weapons and explosives, just ... μm) 1.38 and 0.472, respectively The location of p-n junction is found to be 0.99μm The location of Ge layer is 1.28 μm Fig Electric field profiles of 3C-SiC THz IMPATTs 158 Properties and Applications ... 12.(a) TEM micrograph of sample without Ge Fig 12.(b) TEM micrographs of samples with Ge and without Ge 161 162 Properties and Applications of Silicon Carbide Fig 13 Scanning-TEM of samples (a) with...
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Properties and Applications of Silicon Carbide Part 7 potx
Ngày tải lên :
20/06/2014, 04:20
... time (min) Fig Depth profiles of a) NiSi2; b) NiSi and c) Ni2Si derived from successive ion etchings and analysis of the Si 2p and Ni 2p3/2 levels in XPS The content of C, O and Si from the surface ... formation of alternating Ni-silicide and C layers The systems which show the tendency of the formation of periodic bands have relatively large parabolic rate constant k and k0 values (intercept of the ... silicides and controls the rate of Ni2Si formation in the second reaction stage As a result of fast dissociation of SiC and enhanced diffusion of Ni, Ni2Si is formed quicker under the action of argon...
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Properties and Applications of Silicon Carbide Part 8 potx
Ngày tải lên :
20/06/2014, 04:20
... percolation of the filler particles and the fractal nature of filler distribution in non- 204 Properties and Applications of Silicon Carbide whisker particulate composites and related it to the ac and ... whisker defects Many of these will be considered in this section, and a discussion of interface effects and SiCw defects is given in Section 3.8 Properties of the Al2O3 and sintering additives ... breakage of interatomic bonds and frictional sliding also increase the work of fracture 210 Properties and Applications of Silicon Carbide One study (Iio et al., 1989) showed that the inclusion of...
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Properties and Applications of Silicon Carbide Part 9 pptx
Ngày tải lên :
20/06/2014, 04:20
... active oxidation of SiC and contemporary partial evaporation of SiO2 240 Properties and Applications of Silicon Carbide a b Fig SEM micrographs of a) cross-section and b) surface of the sample ... flow and the evolution of the ratio IO/IAr, where IO and IAr are the intensities of oxygen and argon emission spectral lines respectively, is measured along the 242 Properties and Applications of ... production of dense materials by mean of pressure assisted sintering, and to investigate the influence of a variety of additives, including carbon and silicon carbide, on the processing and oxidation...
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Properties and Applications of Silicon Carbide Part 10 pot
Ngày tải lên :
20/06/2014, 04:20
... Evaluation of Silicon Carbide Surge Arresters 267 magnets Blocks of SiC gap electrodes and nonlinear resistors Fig Surge arrester of manufacturer A Blocks of SiC Blocks of SiC Fig Surge arrester of manufacturer ... manufacturers A and C, respectively As a general conclusion, it was observed that the surge arresters of manufacturers A and C presented evidence of ingress of moisture and signs of discharges ... moisture and (d) gap electrode: signs of discharge 270 Properties and Applications of Silicon Carbide (a) (b) (c) (d) Fig Surge arresters of manufacturer C, (a) block surface: presence of moisture,...
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Properties and Applications of Silicon Carbide Part 11 ppt
Ngày tải lên :
20/06/2014, 04:20
... exhibit high-strength and relatively high-creep resistance These properties of boron- and carbon-doped SiC originate from the absence of grain-boundary phases and existence of covalent bonds between ... fills most of the wood channels The diversity of wood species, including soft and hard, provides a wide choice of materials, in which the density and the anisotropy are the critical factors of the ... human fibroblasts and osteoblasts (Naji and Harmand, 1991) and open porosity of these materials make them great candidates for biomedical applications Biomedical applications of SiC Silicon carbides...
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Properties and Applications of Silicon Carbide Part 12 doc
Ngày tải lên :
20/06/2014, 04:20
... coating of a silicon carbide stent and a long-term release of the desired agent, PLA and PLGA are biocompatible materials useful for a variety of applications, including the design and properties of ... the effectiveness of drug therapy is closely related to biophysics and physiology of drug movement through tissue Therefore, DDS requires an understanding of the characteristics of the system, the ... NCLP profiles were obtained for each surface over a distance of 3.094 mm with a lateral resolution of 1àm using a Gaussian filter and an attenuation factor of 60% at a cut-off wavelength of 0.59...
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