Results 11 to 20 of about 314,443 (260)

Multivariate analyses of heavy metals in soils and Colophospermum mopane leaves around the Selebi Phikwe nickel-copper mine and smelter/concentrator plant area, Botswana

open access: yesJournal of Applied Sciences and Environmental Management, 2005
This study was conducted in order to ascertain levels of concentrations and areal distribution of heavy metals in the surface soils and vegetation around the Selebi Phikwe Ni-Cu mine and smelter/concentrator plant, Botswana. One hundred and forty samples
E Georges-Ivo Ekosse   +2 more
doaj   +1 more source

Crystal structure of 3-bromo-2-hydroxybenzonitrile

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
The crystal structure of the title compound, C7H4BrNO, has been determined, revealing a partial molecular packing disorder such that a 180° rotation of the molecule about the phenol C—O bond results in disorder of the bromine and nitrile groups.
Sean R. Dickinson   +2 more
doaj   +1 more source

The Limits of X-ray Diffraction Theory

open access: yesCrystals, 2023
X-ray diffraction theory allows the interpretation of experiments to build a structural model that fits the collected data. As with any experimental science, the observations are subject to uncertainty through the instrument and user limitations ...
Paul F. Fewster
doaj   +1 more source

Alpha- quartz quantitative X ray diffraction analysis

open access: yesMateriales de Construccion, 1967
Not ...
J. L. Sagrera
doaj   +1 more source

Diffractive X-Ray Telescopes [PDF]

open access: yesX-Ray Optics and Instrumentation, 2010
Diffractive X-ray telescopes using zone plates, phase Fresnel lenses, or related optical elements have the potential to provide astronomers with true imaging capability with resolution several orders of magnitude better than available in any other waveband.
openaire   +2 more sources

A green and efficient protocol for the synthesis of dihydropyrano[2,3-c]pyrazole derivatives via a one-pot, four component reaction by grinding method

open access: yesJournal of Advanced Research, 2015
An efficient grinding protocol for the synthesis of dihydropyrano[2,3-c]pyrazole derivatives from acetylene ester, hydrazine hydrate, aryl aldehydes and malononitrile under solvent free conditions has been achieved with excellent yields.
Sethurajan Ambethkar   +2 more
doaj   +1 more source

Advantages of Using Hard X-ray Photons for Ultrafast Diffraction Measurements

open access: yesPhotonics, 2023
We present a comparative theoretical study of silicon crystals irradiated with X-ray free-electron laser pulses, using hard X-ray photons of various energies.
Vladimir Lipp, Ichiro Inoue, Beata Ziaja
doaj   +1 more source

Ultrafast X-ray diffraction

open access: yes, 2005
This study presents recent developments and applications of ultrafast X-ray diffraction. These include optical pump/X-ray probe experiments for performing ultrafast X-ray spectroscopy, time-resolved X-ray diffraction for the investigation of electronically induced solid-liquid phase transformations in semiconductors, and time-resolved X-ray diffraction
Sokolowski-Tinten, Klaus   +9 more
openaire   +3 more sources

Dataset of asymmetric intramolecular [4+3] cycloaddition reactions catalyzed by NHC-gold(I) complexes

open access: yesData in Brief, 2019
The shared data is the unpublished portion of the experimental section for the article with the title “NHC–Au(I) catalyzed enantioselective intramolecular [4 + 3] cycloaddition of furan propargyl esters”.[1] The preparation of the intermediates for ...
Ruoyu Ma   +3 more
doaj   +1 more source

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