X-ray Spectrometry

Szalóki, I.; Török, Szabina; Injuk, J.; Grieken, R.E. Van

doi:10.1021/ac020241k

Cited by 5 publications

(3 citation statements)

References 116 publications

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“…1c). As the method for preparing samples for LA-ICP-MS resulted in IVD loss, a scanning confocal SR-μXRF was used to examine the distribution of tungsten in IVDs [since this non-destructive technique is a powerful analytical tool for qualitative analysis of the chemical elements present in the sample (Szalóki et al, 2004;VanderSchee et al, 2018)]. Recently, SR-μXRF has been used to determine the spatial distribution and speciation of tungsten in bone (VanderSchee et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Tungsten accumulates in the intervertebral disc and vertebrae stimulating disc degeneration and upregulating markers of inflammation and pain

Grant¹,

VanderSchee²,

Chou³

et al. 2021

eCM

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Tungsten is incorporated in many industrial goods, military applications and medical devices due to its ability to impart flexibility, strength and conductance to materials. Emerging evidence has questioned the safety of tungsten exposure as studies have demonstrated it can promote tumour formation, induce pulmonary disease and alter immune function. Although tungsten is excreted from the body it can accumulate in certain organs such as the brain, colon, liver, kidneys, spleen and bones, where most of the bioaccumulation occurs. Whether prolonged tungsten exposure leads to accumulation in other tissues is unknown. The present study demonstrated that mice exposed to 15 ppm sodium tungstate for 4 weeks in their drinking water showed comparable accumulation in both the bony vertebrae and intervertebral discs (IVDs). Lumbar IVD height was significantly reduced in tungsten-exposed mice and accompanied by decreased proteoglycan content and increased fibrosis. In addition to catabolic enzymes, tungsten also increased the expression of the inflammatory cytokines IL-1β and tumour necrosis factor (TNF)-α as well as the neurotrophic factors nerve growth factor (NGF) and brain-derived nerve factor (BDNF) in IVD cells. Tungsten significantly increased the presence of nociceptive neurons at the endplates of IVDs as observed by the expression of calcitonin gene-related peptide (CGRP) and anti-protein gene product 9.5 (PGP9.5) in endplate vessels. The present study provided evidence that tungsten may enhance disc degeneration and fibrosis as well as increase the expression of markers for pain. Therefore, tungsten toxicity may play a role in disc degeneration disease.

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Section: Resultsmentioning

confidence: 99%

Tungsten accumulates in the intervertebral disc and vertebrae stimulating disc degeneration and upregulating markers of inflammation and pain

Grant¹,

VanderSchee²,

Chou³

et al. 2021

eCM

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“…The relation between the modulated part χ(k) of an absorption spectrum and the structural parameters of the sample, has been established in numerous theoretical works [135,136] and can be written as:…”

Section: Extended X-ray Absorption Fine Structure (Exafs)mentioning

confidence: 99%

X-Ray Absorption Spectroscopy and Anomalous Wide Angle X-Ray Scattering: Two Basic Tools in the Analysis of Heterogeneous Catalysts

Bazin¹,

Lynch²,

Ramos-Fernandez³

2003

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Spectroscopie d'absorption et diffusion anomale à grands angles des rayons X : deux outils de base dans l'analyse de catalyseurs hétérogènes -Notre compréhension des processus physicochimiques à l'échelle atomique dans des nanomatériaux a progressé de manière notoire ces dernières décennies grâce à l'émergence de techniques liées au rayonnement synchrotron. Dans cet article, nous décrivons la spectroscopie d'absorption des rayons X mous et durs et la diffusion anomale des rayons X, deux techniques se servant des propriétés spécifiques d'un faisceau synchrotron, en particulier de la large gamme spectrale. Nous centrons la présentation sur les avancées dans la description de catalyseurs hétérogènes. Les apports et les limitations de chaque technique sont analysés. Abstract -X-Ray Absorption Spectroscopy and Anomalous Wide Angle X-Ray Scattering: Two Basic Tools in the Analysis of Heterogeneous Catalysts -In the past decades, our understanding of physicochemical processes at the atomic level in nanomaterials has been significantly improved by the emergence of synchrotron radiation related techniques. In this review paper, we describe two techniques:X-ray absorption spectroscopy (XAS) using soft and hard X-rays, and anomalous wide angle X-ray scattering (AWAXS), both of which use some of the specific properties of a synchrotron beam, in particular the wide spectral range. We focus on the numerous breakthroughs which have been achieved using these techniques in describing heterogeneous catalysts. The merits and shortcomings of each technique are discussed.

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“…However, it is appropriate to start this year's ASU review by marking the passing during June, 2002, of one of the great communicators of modern XRF, Ron Jenkins, whose work must have touched all that contribute to this topic. 1 The Analytical Chemistry review of X-ray spectrometry was published during the current review period by Szaloki et al 265 Although there is some topic overlap with the present review, the Analytical Chemistry review extends to subjects such as EPMA, PIXE and XAS. Other XRF topic reviews included one by Munk 2 on sub-ppm levels of trace elements in Trends in Analytical Chemistry and the preparation and use of reference materials for quality assurance in inorganic trace analysis, 3 which covered the preparation and role of natural matrix reference materials of biological origin whose suitability extends to microanalytical techniques.…”

mentioning

confidence: 91%

Atomic spectrometry update. X-ray fluorescence spectrometry

Potts

Ellis

Kregsamer³

et al. 2003

J. Anal. At. Spectrom.

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6.4 Applications 7 Portable and mobile XRF 8 On-line XRF 9 Applications 9.1 Sample preparation and preconcentration techniques 9.2 Geological 9.3 Environmental 9.4 Archaeological and forensic 9.5 Industrial 9.6 Clinical and biological 9.7 Thin films 9.8 Chemical state analysis and speciation 10 ReferencesThis annual review of X-ray fluorescence covers developments over the period 2002-2003 in instrumentation and detectors, matrix correction and spectrum analysis procedures, X-ray optics and microfluorescence, synchrotron XRF, TXRF, portable XRF and on-line applications as assessed from the published literature. The review also covers a survey of applications, including sample preparation, geological, environmental, archaeological, forensic, biological, clinical, thin films, chemical state and speciation studies. During the current review period, trends were noted in the increased use of principal component analysis in the assessment of environmental data and chemometrics in the interpretation of XRF data in general, meticulous experimentation to model the emission spectra of X-ray tubes to improve the accuracy of FP correction procedures, a slowdown in reports on the development of ultra-high resolution cryogenic ED detectors, the use of EXAFS and XANES in fluorescence, as opposed to the more traditional absorption mode, continued interest in SR sources and interesting artefact measurements performed using XRF and related instrumentation. Instrumentation General instrumentation and excitation sourcesSeveral developments in the design of commercially available X-ray spectrometers feature in the literature during this review

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X-ray Spectrometry

Cited by 5 publications

References 116 publications

Tungsten accumulates in the intervertebral disc and vertebrae stimulating disc degeneration and upregulating markers of inflammation and pain

Tungsten accumulates in the intervertebral disc and vertebrae stimulating disc degeneration and upregulating markers of inflammation and pain

X-Ray Absorption Spectroscopy and Anomalous Wide Angle X-Ray Scattering: Two Basic Tools in the Analysis of Heterogeneous Catalysts

Atomic spectrometry update. X-ray fluorescence spectrometry

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