scholarly journals Negotiating a colonial Maya identity: metal ornaments from Tipu, Belize

2013 ◽  
Vol 1 (1) ◽  
pp. 24 ◽  
Author(s):  
Bryan Cockrell ◽  
Marcos Martinón-Torres ◽  
Elizabeth Graham
Keyword(s):  
Energy Dispersive Spectroscopy ◽  
Electron Probe ◽  
Colonial Period ◽  
Energy Dispersive ◽  
Contact Period ◽  
Wavelength Dispersive Spectroscopy ◽  
X Ray ◽  
Surface Etching ◽  
Electron Probe Microanalyser ◽  
European Technology

Archaeologists recovered Colonial-period metal ornaments from Tipu, Belize, the site of a Maya occupation from 300 BC to AD 1707. This project asks to what extent the technological attributes of these ornaments reflect Mesoamerican or European influences. Investigators used microanalytical techniques, such as metallography, energy dispersive X-ray fluorescence (ED-XRF), electron probe microanalyser with energy dispersive spectroscopy (EPMA-EDS) and wavelength dispersive spectroscopy (EPMA-WDS) and surface etching, to study compositions and microstructures of the metals. Comparison of these data with technological and stylistic information of metals from other pre-Columbian and Contact-period sites reveals a confluence of indigenous and European metallurgy. Whereas the needle and bell forms and the suite of copper and bronze compositions align with indigenous metallurgical practices, the existence of lacetags and the use of brass reflect European technology. The presence of metal ornaments in association with Maya individuals in burials suggests that the Maya at Tipu were constructing and expressing new colonial identities through material markers.

scholarly journals Forty Years of X-ray Mapping, from the Beginning to Position-Tagged Spectrometry

1996 ◽  
Vol 4 (1) ◽  
pp. 12-13
Author(s):  
John J. Friel
Keyword(s):  
Spatial Distribution ◽  
Energy Dispersive Spectroscopy ◽  
Energy Dispersive ◽  
Wavelength Dispersive Spectroscopy ◽  
X Ray ◽  
Scanning Beam ◽  
Distribution Of Elements

The ability of scanning beam x-ray microanaiysis to show the spatial distribution of elements was recognized quite early. At first it was done one element at a time by wavelength dispersive spectroscopy (WDS), but when energy dispersive spectroscopy was developed, that became the technique of choice. Because there have been several significant improvements in the technology, and also because maps are used so universally, I thought a review of the technology from the early days to the latest technology might be interesting. Though modern maps are ail digital, the original analog “dot” maps are used by a few even to this day. Other names for the technique are sometimes used such as “x-ray image”, which is correct but can be confused with radiography. Compositional image has also been used, but the term is broad and includes more than x-ray maps. Consequently, the universally recognized term “maps” will be used.

scholarly journals Scanning electron microscopy and X-ray spectroscopy applied to mycelial phase of sporothrix schenckii

1975 ◽  
Vol 9 (2) ◽  
pp. 57-68
Author(s):  
M. Thibaut ◽  
M. Ansel
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Energy Dispersive Spectroscopy ◽  
Sporothrix Schenckii ◽  
Energy Dispersive ◽  
Regular Pattern ◽  
Wavelength Dispersive Spectroscopy ◽  
X Ray ◽  
Mycelial Phase ◽  
Scanning Electron

Scanning electron microscopy applied to the mycelial phase of Sporothrix schenckii shows a matted mycelium with conidia of a regular pattern. X-Ray microanalysis applied in energy dispersive spectroscopy and also in wavelength dispersive spectroscopy reveals the presence of several elements of Mendeleef's classification.

Elemental hair analysis using nuclear microscopy and X-ray energy dispersive spectroscopy

The Analyst ◽  
1995 ◽  
Vol 120 (3) ◽  
pp. 783 ◽  
Author(s):  
Jill A. Cargnello ◽  
Jonathan J. Powell ◽  
Richard P. H. Thompson ◽  
Peter R. Crocker ◽  
Frank Watt
Keyword(s):  
Energy Dispersive Spectroscopy ◽  
Hair Analysis ◽  
Energy Dispersive ◽  
X Ray ◽  
Nuclear Microscopy

Composition Analysis of Ge/Si1-xGex: C Buffer on Silicon Measured by Planar Scanning Energy Dispersive Spectroscopy

2011 ◽  
Vol 383-390 ◽  
pp. 7619-7623
Author(s):  
Z Z Lu ◽  
F. Yu ◽  
L. Yu ◽  
L. H. Cheng ◽  
P. Han
Keyword(s):  
Energy Dispersive Spectroscopy ◽  
Chemical Vapor ◽  
Energy Dispersive ◽  
Composition Analysis ◽  
X Ray Diffraction ◽  
Si Substrate ◽  
Composition Distribution ◽  
X Ray ◽  
Cvd Method ◽  
Substrate Structure

In this work, Si, Ge element composition distribution in Ge /Si1-xGex:C /Si substrate structure has been characterized and modified by planar scanning energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The Ge /Si1-xGex:C /Si substrate samples are grown by chemical vapor deposition (CVD) method. The accuracy of EDS value can be improved by ~ 32%. And the modified EDS results indicate the Ge distribution in the Ge/Si1-xGex:C/Si sub structure.

AN EVALUATION OF THE USE OF ELYTRA AND BODIES IN X-RAY ENERGY-DISPERSIVE SPECTROSCOPIC STUDIES OF THE RED TURNIP BEETLE, ENTOMOSCELIS AMERICANA (COLEOPTERA: CHRYSOMELIDAE)

1980 ◽  
Vol 112 (6) ◽  
pp. 609-614 ◽  
Author(s):  
W. J. Turnock ◽  
G. H. Gerber ◽  
D. U. Sabourin
Keyword(s):  
Discriminant Analysis ◽  
Energy Dispersive Spectroscopy ◽  
Spectroscopic Studies ◽  
Energy Dispersive ◽  
Spectroscopy Technique ◽  
X Ray ◽  
Insect Dispersal ◽  
Canonical Variables ◽  
The Mean ◽  
Individual Variables

AbstractSamples of the bodies and elytra of Entomoscelis americana Brown were analyzed separately by X-ray energy-dispersive spectroscopy. Discriminant analysis revealed that the chemoprints of the bodies of newly-emerged beetles (1 wk old) were distinct from those of post-aestivation beetles (9- to 10-wk old). However, the chemoprints of the elytra of newly-emerged and post-aestivation beetles were not as different as those of the bodies as demonstrated by the overlap in the plot of the first two canonical variables. The variances of the mean difference of individual variables between newly-emerged and post-aestivation groups generally were smaller for elytra than for bodies. This suggests that the chemoprints of the elytra of E. americana are more stable than those of the bodies and consequently the elytra should be more suitable than the bodies in insect dispersal studies utilizing the X-ray energy-dispersive spectroscopy technique.

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