Results 31 to 40 of about 287,975 (304)

Physical investigations on the radiation damage of graphene oxide by IR pulsed laser

open access: yesEPJ Web of Conferences, 2018
Graphene oxide foils were irradiated by Nd:YAG laser at the moderated intensities of the order of 108 W/cm2 in vacuum. Measurements of atomic emission during the laser irradiation were performed with ion collectors and mass spectrometry, demonstrating a ...
Silipigni Letteria   +2 more
doaj   +1 more source

Preconcentration of Copper Ion on Modified Magnetic Fe3O4@SiO2 Nanoparticles in some Environmental Samples and its Determination by Electrothermal Atomic Absorption Spectrometry [PDF]

open access: yesIranica Journal of Energy and Environment, 2016
Magnetic silica nanoparticles modified by 3-[2-(2-aminoethylamino) ethylamino] propyl-trimethoxysilane (AAAPTS) and Salicylaldehyde were prepared and used as a new adsorbent for extraction and preconentration of copper ion through magnetic solid-phase ...
M. Naghizadeh   +3 more
doaj   +1 more source

Combination of particle-induced X-ray emission (PIXE) spectrometry and proton-induced gamma-ray emission (PIGE) spectrometry for analysis of azure color in tile [PDF]

open access: yesمجله علوم و فنون هسته‌ای, 2015
Ion beam analysis (IBA) has been widely used for fast, sensitive, multi-elemental and nondestructive analysis without any sampling, especially for the pigment analysis.
Marjan Ghadiri   +1 more
doaj  

Research Paper: Passive Spectrometry of X-ray Emission in IR-MPF-100 Plasma Focus Device [PDF]

open access: yesفیزیک کاربردی ایران
The plasma focus device produces short and intense pulses of X-rays during its pinch duration. These X-rays are a valuable diagnostic tool for understanding the performance and properties of the device.
Noushin Pishbin   +3 more
doaj   +1 more source

Synthesis and Characterization of LaNiO3, LaNi(1-x)Fe xO3 andLaNi(1-x)Co xO3 Perovskite Oxides for Catalysis Application [PDF]

open access: yesMaterials Research, 2002
Mixed metal oxides with perovskite-type structure show a great potential to be used in catalysis, electrocatalysis and electronic ceramics. Perovskites oxides catalysts with the composition LaNiO3, LaNi(1-x)Fe xO3 and LaNi(1-x)Co xO3 (x = 0.4 and 0.7 ...
Sania Maria de Lima, José Mansur Assaf
doaj   +1 more source

Demetallization of crude oil using Oxaline functionalized easily separable paramagnetic rust products

open access: yesZanco Journal of Pure and Applied Sciences, 2023
     The removal of catalyst poisoning compounds from crude oil or heavy oil fractions improves the efficiency of oil refineries and reduces the cost of high temperature corrosion damage during combustion. In this study, the demetallization of crude oil
Cheman Dlshad Yousif   +1 more
doaj   +1 more source

Analytical studies on medieval lead ingots from Wrocław and Kraków (Poland): a step towards understanding bulk trade of lead from Kraków and Silesia Upland Pb–Zn deposits

open access: yesHeritage Science, 2022
Origins of medieval lead artefacts are hard to establish due to re-smelting and mixing. One can obtain conclusive evidence from ingots that served for bulk trade and originated directly from the mines.
Beata Miazga   +4 more
doaj   +1 more source

Environmentally benign copper nanoparticles supported on walnut shell as a highly durable nanocatalyst for the synthesis of propargylamines [PDF]

open access: yesJournal of the Serbian Chemical Society, 2017
This study was an attempt to prepare copper nanoparticles and to determine their catalytic activity employing walnut shell (WS) residue as a green support and a reusable material.
Saadati Fariba   +2 more
doaj   +1 more source

Modern X-ray Spectroscopy I. X-ray Emission Spectrometry

open access: yesJournal of the Spectroscopical Society of Japan, 2008
X-ray fluorescence spectrometry enables non-destructive elemental analysis at ambient air pressure. In this article, after short description of interaction between x-rays and solid matter, mechanism of emission of x-ray fluorescence are explained, recent developments of x-ray source, x-ray optics, especially x-ray polycapillary focusing optics and x ...
openaire   +2 more sources

Effect of Metal Oxides on Reaction Route and Product Distribution of Catalytic Cellulose Hydrogenolysis

open access: yesBioResources, 2023
The effects of CeO2, ZrO2, Nb2O5, and ZnO catalysts supported on carbon nanotubes (CNT) relative to cellulose hydrothermal hydrogenolysis in the presence of Ni/CNT and pressured H2 was studied in this work. The catalysts were characterized by inductively
Guifang Fan   +4 more
doaj   +2 more sources

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