Results 11 to 20 of about 103,977 (217)

STUDY THE VARIATIONS OF WEATHERING LEVELS FOR SOME SOILS FORMED UNDER DIFFERENT CLIMATEIC CONDITIONS / NORTHERN IRAQ [PDF]

open access: yesMesopotamia Journal of Agriculture, 2019
Nine soil samples were selected from three different locations in Ninavah and Duhok Governorates. The locations included Makhmour, Hamdania and Zakho. The studied areas were selected according the variation of annual temperature and rainfall. Soil orders
Saleh Mawlood, Qahtan D. Essa
doaj   +1 more source

Visualizing the valence states of europium ions in Eu-doped BaAl2O4 using X-ray nanoprobe mapping

open access: yesJournal of Synchrotron Radiation, 2022
This study develops and successfully demonstrates visualization methods for the characterization of europium (Eu)-doped BaAl2O4 phosphors using X-ray nanoprobe techniques.
Yu-Hao Wu   +10 more
doaj   +1 more source

ALTERNATIVE METHOD FOR DETERMINING METAL UPTAKE FROM WATER BY ESCHERICHIA COLI K12 CD3 [PDF]

open access: yesمجلة الأنبار للعلوم الزراعية
Bacteria are usually applied in biotechnology in areas such as element adsorptions due to extracellular/intracellular accumulation. Electron microscopes and spectrophotometry have shown proximate/accurate methods for observing and detecting these ...
N. M. T. Jebril   +5 more
doaj   +1 more source

X-ray Flashes or soft Gamma-ray Bursts? The case of the likely distant XRF 040912 [PDF]

open access: yes, 2006
In this work, we present a multi-wavelength study of XRF 040912, aimed at measuring its distance scale and the intrinsic burst properties. We performed a detailed spectral and temporal analysis of both the prompt and the afterglow emission and we ...
A. de Ugarte Postigo   +91 more
core   +4 more sources

Application of bias correction methods to improve U3Si2 sample preparation for quantitative analysis by WDXRF

open access: yesBrazilian Journal of Radiation Sciences, 2019
The determination of silicon (Si), total uranium (U) and impurities in uranium-silicide (U3Si2) samples by wavelength dispersion X-ray fluorescence technique (WDXRF) has been already validated and is currently implemented at IPEN’s X-Ray Fluorescence ...
Marcos Antonio Scapin
doaj   +1 more source

Could the GRB-Supernovae GRB 031203 and XRF 060218 be Cosmic Twins? [PDF]

open access: yes, 2010
The gamma-ray burst (GRB) / X-ray flash (XRF) events GRB 031203, discovered by INTEGRAL, and XRF 060218, discovered by Swift, represent two of only five GRB-SNe with optical spectroscopic confirmation of their SN components.
Aptekar   +44 more
core   +1 more source

Development of X-ray fluorescence technique for the uranium determination in Mongolian coal, coal ash, and phosphate ore [PDF]

open access: yes, 2014
The results of the determination of uranium in Mongolian brown coal, coal ash, phosphate rock, and technological samples by X-ray fluorescence (XRF) spectrometry are presented.
Bolortuya, D.   +3 more
core   +2 more sources

The first Swift X-ray Flash: The faint afterglow of XRF 050215B [PDF]

open access: yes, 2006
We present the discovery of XRF 050215B and its afterglow. The burst was detected by the Swift BAT during the check-out phase and observations with the X-ray telescope began approximately 30 minutes after the burst.
A. J. Levan   +23 more
core   +2 more sources

Kepek Khan's Monetary Reform According to the Results of a Study of the Coin Silver Chemical Composition by the XRD Method

open access: yesПоволжская археология, 2019
The purpose of this study is to identify changes in the quality of silver coin minted in Bukhara and Samarkand at Khan Kebek, compared with similar coins in the previous period (post-reform "Masudbek" emissions).
Baitanayev Bauyrzhan A.   +2 more
doaj   +1 more source

Assessment of Selected Metals in Onion Bulbs and Leaves Collected from Samaru Market, Zaria, Kaduna State, Nigeria [PDF]

open access: yesPhysics Access, 2023
This study examined the levels of metals (Mg, Al, Si, P, S, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Zr, Nb, Mo, Ag, Sn, Sb, Ta, Pt, Au, Pb, and Bi) in onion bulbs and leaves in light of the latent toxicity, unsolvable character, and snowballing ...
Onoja D Emmanuel   +3 more
doaj   +1 more source

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