[PDF] Top 20 Utilización de Objetos de Aprendizaje como Opción para la Educación Continua de los Docentes de Nivel Superior-Edición Única
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Determining the Content of Silicon Dioxide in Bauxites Using X-Ray Fluorescence Spectrometry
... X-ray fluorescence spectrometry offers a large number of ...of fluorescence is proportional to the mass proportion of all the components present in the sample, modern ... See full document
90
Determination of Iron Oxide Content in Bauxites Using X-Ray Fluorescence Spectrometry by Pressing: A Comparative Study with Spectrophotometric Method
... coefficient of correlation r = 0.9989 and the standard deviation S = 3.4420. The XRF method was statistically verified by the F-test and t-test (using the standard sample of the bauxite and the reference method). ... See full document
10
Non-destructive survey of early Roman copper-alloy brooches using portable X-ray Fluorescence Spectrometry
... identi fi ed multiple distinct compositional groups of Roman brooches that matched well with typo-chronological groupings. The use of ternary diagrams implies that concentrations of the se- lected alloying elements (Sn, ... See full document
13
Thermal Analysis: A Complementary Method to Study the Shurijeh Clay Minerals
... Generally, thermal analysis showed the presence of quartz (573 and 870C), carbonates (600 and760C), organic matter, only in samples from the gas producing well (200 to 500°C), kaolinite (569 and 988C), illite (89, ... See full document
24
Determining Attitude and Position in Deep Space Missions Using X Ray Pulsars
... in X-spectrum electromagnetic pulsars in the 1970s—waves with the frequency of 1 - 20 Kev ( ...of X-ray pulsars for satellite navigation around the earth ...in X ray—which were ... See full document
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Chemical analysis of sediments using X Ray fluorescence on board an Autonomous Underwater Vehicle
... an X-ray spectrometer and X-ray tube and an AUV platform developed by the CSIRO called ...and X-ray tube are seated in the downwards- facing ...which X-rays could pass ... See full document
11
Analysis of Heavy Metals in a Tailing Impoundment of Abandoned Mn Mine by Using Two Sequential Extractions*
... The tailing impoundment was investigated for vertical distribution of minerals by X-ray fluorescence analysis (XRF), powder X-ray diffraction (XRD), and two sequential extraction ... See full document
89
The Application and Limitations of PECVD for Silicon-based Photonics
... exhibit strong room temperature photoluminescence, with the optimum emission depending on the composition and processing of the films. The strongest emission was achieved for films with a silicon content of ... See full document
20
X-Ray Diffraction Analyses of Titanium Dioxide Nanoparticles
... At a point when the particle size is under 100 nm, appreciable broadening will occur in x-ray diffraction pattern because of particle size and strain. The average particles size is evaluated by the observed ... See full document
5
Assessment of air pollution by heavy metals in the urban center of Algiers
... The trace element concentrations were also determined by INAA according to the procedure fully detailed in Revel and Ayrault (2000). Instrumental Neutron Activation Analysis is a sensitive technique and nondestructive in ... See full document
186
MUNICIPAL SOLID WASTE COMPOST ADDITION AS AN ORGANIC AMENDMENT ON GALICIAN AGRICULTURAL SOILS (NW SPAIN)
... and from extremely acid to neutral for pH (KCl). Instead of the fact that no significant differences were found between treatments for the total amount of C, N and OM, a tendency to increase its organic content ... See full document
21
ELEMENTAL ANALYSIS AND BIOLOGICAL STUDIES OF PHYSALIS ANGULATA L USING WAVE LENGTH DISPERSIVE X RAY FLUORESCENCE TECHNIQUE, WAVELENGTH DISPERSION X RAY FLUORESCENCE, FROM RAJASTHAN
... hand, X-ray fluorescence does not require any chemical treatment to the samples, lesser time is required and more accurate results are ...mineral content in milk based products [23], in ... See full document
199
Analytical, geochemical and biogeochemical studies of tungsten and molybdenum : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy at Massey University
... of using an ash wei ght basi s for the bi ogeochemical expl orati on , and a dry wei ght basi s for all other work ...ash content ; ( ii ) met al concentrati ons in the ash are general ly of the same order ... See full document
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ELEMENTAL ANALYSIS OF SOIL SAMPLES USING ENERGY DISPERSIVE X-RAY FLUORESCENCE TECHNIQUE
... The work presented in this paper deals with the elemental analysis of soil samples, by using a method based upon Energy Dispersive X-Ray Fluorescence(EDXRF) technique. The soil pollution is a ... See full document
9
Spatial distribution of Uranium in Groundwater of Bathinda District Using GIS- A Case Study Harsimranjit Kaur Romana
... The paper reviews the spatial distribution of uranium contamination in groundwater of district Bathinda using arc- map 10.1. The increased dependency on canal water for both domestic and irrigational purposes has ... See full document
9
Impacts of Post metallisation Processes on the Electrical and Photovoltaic Properties of Si Quantum Dot Solar Cells
... 1. M.A. Green, G.Conibeer, E.-C. Cho, D. Konig, S.J. Huang, D.Song, G. Scardera, Y.-H. Cho, X.J. Hao, T. Fangsuwannarak, S.W. Park, I. Perez-Wurfl, Y. Huang, S. Cheng, E. Pink, D. Bellet, E. Bellet-Amalric, T. Puzzer, ... See full document
17
Microwave Studies of Ferrite-Ferroelectric Composites Prepared through Self Propagating Auto Combustion Route
... 0.4, 0.6 and y = 0.15, 0.30, 0.45) composites were prepared by self propagating auto combustion route and characterized using X-ray diffraction and SEM technique. The increase in porosity of ferrite ... See full document
147
X ray computed tomography (XCT) and chemical analysis (EDX and XRF) used in conjunction for cultural conservation: the case of the earliest scientifically described dinosaur Megalosaurus bucklandii
... surface X-ray absorp- tion [18, ...overcome using a closely related approach, neutron tomography ...of X-rays [56, 57]. Its specific attenuation properties differ from X-rays, typically ... See full document
74
Spatial resolution of confocal XRF technique using capillary optics
... X-ray fluorescence (XRF) is a highly sensitive, non- destructive technique that is able to detect element traces for material elemental analysis. It is now widely used in various fields of science ... See full document
32
Synchrotron X-ray fluorescence analysis in environmental and earth sciences
... focused using a poly-capillary half-lens and a second glass poly-capillary is placed in front of the energy dispersive X-ray detector to establish the confocal detection geometry with a design as in ... See full document
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