A Paleocene vertebrate-bitten crocodilian coprolite from Liverpool Point, Maryland, U.S.A.

Although still exceedingly rare, the number of known vertebrate-bitten coprolites continues to increase. A vertebrate-bitten coprolite is herein reported from the Piscataway Member of the upper Paleocene Aquia Formation at Liverpool Point, Maryland, U.S.A.The specimen is described, figured, and chemically characterized by means of non-destructive hand-held energy dispersive X-ray fluorescence (HH-XRF). Four roughly parallel and evenly spaced gouges disrupt the surface of this compound ichnofossil. Many more much smaller markings, interpreted as feeding traces by smaller organisms (invertebrates or small actinopterygian fishes?), also ornament its surface. Whereas the studied coprolite can be identified most likely as the fossilized feces of a crocodilian, the identity of the vertebrate(s) that bit it remains unknown.

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Energy dispersive X-ray diffraction (EDXRD) for operando materials characterization within batteries

Physical Chemistry Chemical Physics ◽

10.1039/d0cp00778a ◽

2020 ◽

Vol 22 (37) ◽

pp. 20972-20989 ◽

Cited By ~ 4

Author(s):

Amy C. Marschilok ◽

Andrea M. Bruck ◽

Alyson Abraham ◽

Chavis A. Stackhouse ◽

Kenneth J. Takeuchi ◽

...

Keyword(s):

Materials Characterization ◽

Energy Dispersive ◽

System Level ◽

X Ray Diffraction ◽

X Ray ◽

Non Destructive ◽

Non Destructive Characterization

This review highlights the efficacy of EDXRD as a non-destructive characterization tool in elucidating system-level phenomena for batteries.

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ANALYSIS OF COPPER COINS BY EDXRF TECHNIQUE

International Journal of PIXE ◽

10.1142/s0129083504000197 ◽

2004 ◽

Vol 14 (03n04) ◽

pp. 133-139 ◽

Cited By ~ 4

Author(s):

T. R. RAUTRAY ◽

V. VIJAYAN ◽

P. K. NAYAK ◽

S. JENA

Keyword(s):

Trace Elements ◽

Major And Trace Elements ◽

Spectroscopic Technique ◽

Energy Dispersive ◽

Historical Events ◽

Trade Routes ◽

X Ray ◽

Edxrf Technique ◽

Non Destructive ◽

Archaeological Objects

Coins are important archaeological objects that can provide useful information regarding preparation methodology and provenance. Their classification plays a fundamental role in dating historical events, in constructing trade routes and in establishing the welfare of population. Several Indian copper coins of different periods have been studied using Energy Dispersive X-ray Fluorescence (EDXRF) spectroscopic technique. The method is rapid, efficient, multi elemental and non-destructive in nature. Concentrations of the major and trace elements like Ca , Ti , V , Cr , Mn , Fe , Co , Ni , Cu , Zn , As and Pb have been estimated in these copper coins. In the present investigation, an attempt has been made to characterize some Indian copper coins of different periods using EDXRF technique.

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Handheld Portable Energy-Dispersive X-Ray Fluorescence Spectrometry (pXRF)

The Oxford Handbook of Archaeological Ceramic Analysis ◽

10.1093/oxfordhb/9780199681532.013.41 ◽

2016 ◽

pp. 362-381 ◽

Cited By ~ 1

Author(s):

Elisabeth Holmqvist

Keyword(s):

Production Systems ◽

Matrix Effects ◽

Chemical Characterization ◽

High Sensitivity ◽

Limited Range ◽

Energy Dispersive ◽

Analytical Sensitivity ◽

X Ray ◽

Non Destructive

Handheld portable energy-dispersive X-ray fluorescence (pXRF) spectrometry is used for non-destructive chemical characterization of archaeological ceramics. Portable XRF can provide adequate analytical sensitivity to discriminate geochemically distinct ceramic pastes, and to identify compositional clusters that correlate with data patterns acquired by NAA or other high sensitivity techniques. However, successful non-destructive analysis of unprepared inhomogeneous ceramic samples requires matrix-defined scientific protocols to control matrix effects which reduce the sensitivity and precision of the instrumentation. Quantification of the measured fluorescence intensities into absolute concentration values and detection of light elements is encumbered by the lack of matrix matched calibration and proper vacuum facilities. Nevertheless, semi-quantitative values for a limited range of high Z elements can be generated. Unstandardized results are difficult to validate by others, and decreased analytical resolution of non-destructive surface analysis may disadvantage site-specific sourcing, jeopardize correct group assignments, and lead to under-interpretation of ceramic craft and production systems.

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