نتایج جستجو برای: xrf و sem
تعداد نتایج: 819438 فیلتر نتایج به سال:
This paper shows the results of a study focused on evolution and properties mortars made with mixture portland cement (PC) natural mordenite (Mor). To begin, samples mordenite, sand were studied X-ray diffraction (XRD), fluorescence (XRF) granulometric analysis (GA). Next, ratio 75% PC 25% prepared to determine their initial final setting times, consistency density. Continuing, density, weight ...
Maya blue is a well-known pre-Hispanic pigment, composed of palygorskite or sepiolite and indigo blue, which was used by various Mesoamerican cultures for centuries. There has been limited research about its continued use during the Viceroyalty period; therefore, sixteenth century perfect period through to study continuity traditions. The fact that indigenous people were active participants in ...
Wilson's disease (WD) is a rare autosomal recessive disease due to mutations of the gene encoding the copper-transporter ATP7B. The diagnosis is hampered by the variability of symptoms induced by copper accumulation, the inconstancy of the pathognomonic signs and the absence of a reliable diagnostic test. We investigated the diagnostic potential of X-ray fluorescence (XRF) that allows quantitat...
XRF 030723 is the first X-ray flash (XRF) to show in its optical light curve (LC) a bump that has been interpreted as the signature of a supernova (SN). After subtracting the afterglow component from the observed optical LC of the XRF counterpart, the properties of the SN are constrained by means of synthetic LCs of core-collapse SNe. For the range of redshift suggested for XRF 030723 (z ∼ 0.3 ...
the purpose of the present study was to synthesize and characterize nanosilica from alkali-extraction of silica fume under controlled conditions using poly (vinyl alcohol) (pva) as a dispersing agent. the dissolution efficiency of silica fume was affected by various factors such as concentration of the reagent, reaction time and temperature. a maximum dissolution efficiency of 91% was achieved ...
The movements and efforts of a circular economy, aiming to tap into the resource potential ash, require an intimate knowledge material; often, target elements within this material are part complex ash phases. This work shows how automated SEM investigations measure up other laboratory techniques for analysis elemental composition particle size. Three sewage sludge (SSA) samples have been studie...
PURPOSE Developing an imaging method to directly monitor the spatial distribution of platinum-based (Pt) drugs at the tumor region is of critical importance for early assessment of treatment efficacy and personalized treatment. In this study, the authors investigated the feasibility of imaging platinum (Pt)-based drug distribution using x-ray fluorescence (XRF, a.k.a. characteristic x ray) CT (...
This work aims first to characterize the Maastrichtian and Paleogene clays of Ouled Bou Sbaa phosphate deposit located in northern part Meskala Basin; as a second goal, most efficient clay fractions are tested identified for organic dyes removal. Several techniques methods have been adopted characterization clays: X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), fluoresc...
High costs of imported bleaching earths have led to the need for alternative local sources. The effectiveness acid-activated Achalla clay in crude palm oil was examined. sample collected, sun-dried, manually ground, and activated with hydrochloric acid solution. Characterization raw samples carried out using X-ray fluorescence (XRF), Scanning electron microscopy (SEM), Fourier transform infrare...
In this paper, utilization of clustering algorithms for data fusion in decision level is proposed. The results of automatic isolated word recognition, which are derived from speech spectrograph and Linear Predictive Coding (LPC) analysis, are combined with each other by using fuzzy clustering algorithms, especially fuzzy k-means and fuzzy vector quantization. Experimental results show that the ...
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