Electron microscopic and electron probe x-ray microanalysis (EPXMA) of prostatic intraluminal “crystalloids”

1992 ◽  
Vol 50 (1) ◽  
pp. 608-609
Author(s):  
H.X. Bui ◽  
A. delRosario ◽  
M. Abdulla ◽  
C.E. Sheehan ◽  
R.J. Emerson ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Light Microscopy ◽  
Electron Probe ◽  
Prostatic Adenocarcinoma ◽  
Electron Microscopic ◽  
X Ray ◽  
Significant Potential ◽  
Well Differentiated ◽  
Benign Prostate

Prostatic intraluminal “crystalloids” are intensely eosinophilic, non-birefringent crystalline-like structures readily identified with light microscopy. Well documented to be associated with prostatic adenocarcinoma, these rhomboidal, hexagonal, triangular, polyhedral, or needle-like structures are almost exclusively confined to well differentiated prostatic adenocarcinomas and may occasionally be seen in adjacent benign glands bordering the tumors. Although of significant potential as a signal of nearby cancer in a limited biopsy of benign prostate, these “crystalloids” are poorly defined and their chemical composition has not been determined.

A new and versatile computer program for correcting EPMA data

1992 ◽  
Vol 50 (2) ◽  
pp. 1658-1659
Author(s):  
I Farthing ◽  
G Love ◽  
VD Scott ◽  
CT Walker
Keyword(s):  
Chemical Composition ◽  
Computer Program ◽  
Programming Language ◽  
Atomic Number ◽  
Processing Speed ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Epma Data ◽  
X Ray ◽  
X Ray Absorption

A new computer program has been developed to convert electron probe microanalysis data into accurate measurements of chemical composition. It is menu-based and designed to operate off-line using any IBM PC compatible computer. As shown in the flowchart, fig. 1, the architecture is modular and the programming language adopted is a compilable version of BASIC which possesses much of the processing speed associated with FORTRAN or C. Specimens containing up to fifteen elements, with 4 ≤ Z ≤ 96, can be handled and all the major x-ray lines (Kα, Kβ, Lα, L(β, Mα and Mβ) are available for analysis purposes.The procedure itself is based upon the classical ZAF approach in which corrections for atomic number (Z), x-ray absorption (A), characteristic fluorescence (Fl) and continuum fluorescence (F2) are treated independently. The factors dealing with fluorescence are essentially those of Reed (characteristic) and Springer (continuum) although both contain minor updates. However, the atomic number and absorption factors are the authors' own and the latter, developed from a quadrilateral representation of the x-ray distribution with depth in a solid, distinguishes this program from others.

Peculiarities Of The Diatom Valve Chemical Composition (Inorganic Components) Study By Electron Probe X-Ray Microanalysis

2014 ◽  
Vol 9 (2) ◽  
pp. 65-72
Author(s):  
L.A. Pavlova ◽  
◽  
L.L. Tkachenko ◽  
A.V. Goreglyad ◽  
M.I. Kuzmin ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Electron Probe ◽  
X Ray ◽  
Inorganic Components ◽  
Diatom Valve

Thermoelectric Properties of InxCo4-yNiySb12 Skutterudite Compounds

2007 ◽  
Vol 1044 ◽  
Author(s):  
Veronique Da Ros ◽  
Juliusz Leszczynski ◽  
Bertrand Lenoir ◽  
Anne Dauscher ◽  
Christophe Candolfi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
Thermal Properties ◽  
Chemical Composition ◽  
Thermoelectric Power ◽  
Thermoelectric Properties ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
X Ray Diffraction ◽  
X Ray

AbstractThe preparation of partially filled n-type InxCo4Sb12 skutterudite compounds has been recently reported. The results were particularly promising, the materials exhibiting a ZT value far higher than one at moderated temperature. In this paper, we propose to investigate another way to tune the electrical and thermal properties by substituting Co atoms by Ni atoms in InxCo4Sb12. InxCo4-yNiySb12 polycrystalline samples have been prepared by a conventional metallurgical route. Structural analyses have been carried out by X-ray diffraction. The chemical composition and micro-homogeneity have been checked by electron probe microanalysis. Measurements of the electrical resistivity, thermoelectric power and thermal conductivity have been performed between 300 and 800 K. The influence of the presence of Ni on the thermoelectric properties of InxCo4Sb12 compounds is presented and discussed.

X-Ray Microanalysis of Al/Zr Multilayers in the Transmission Electron Microscope

1997 ◽  
Vol 472 ◽  
Author(s):  
M. A. Wall ◽  
T. W. Barbee ◽  
J. Bentley
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Electron Probe ◽  
Nanometer Scale ◽  
Line Profiles ◽  
Electron Microscopic ◽  
X Ray ◽  
Transmission Electron ◽  
Interface Layers

ABSTRACTA one-nanometer scale transmission electron microscope electron probe X-ray microanalysis characterization of as-deposited and annealed aluminum - 11.5 at.% zirconium multilayer samples in cross-section synthesized by magnetron sputtering is reported on here. Composition line profiles were acquired across Zr layers in as-deposited material and samples isochronnally annealed in a differential scanning calorimeter to temperatures of 290°C and 485°C. A spatial resolution of approximaty 1.5 to 2.0 nm was achieved in these experiments and will be improved by deconvoluti on of the instrumental electron probe function from the data. The as-deposited structure consisted of crystalline Al and Zr layers with thin amorphous layers at the Al/Zr interfaces. The amorphous interface layers increased in thickness upon annealing to 290°C. Additionally, at 290”C a metastable cubic alloy forms at the Zr deposited on Al interface. Upon heating to 485°C a multilayer of Al and metastable cubic AlxZr1-x phase is formed. The electron microscopic experimental technique, observations and data analysis will be discussed as applied to these multilayered materials.

Change in the Chemical Composition of an Analyzed Object During Low-Voltage Electron Probe X-Ray Spectral Microanalysis

2017 ◽  
Vol 59 (11) ◽  
pp. 1234-1237
Author(s):  
A. Yu. Kuzin ◽  
V. B. Mityukhlyaev ◽  
P. A. Todua ◽  
M. N. Filippov
Keyword(s):  
Chemical Composition ◽  
Electron Probe ◽  
Low Voltage ◽  
X Ray ◽  
Voltage Electron

The SEM and EDS Energy Spectrum Analysis of a Beach Placer

2010 ◽  
Vol 158 ◽  
pp. 273-280
Author(s):  
Jun Qiu ◽  
Xian Jun Lu ◽  
Ping Chen ◽  
Shu Gang Hu ◽  
Gui Fang Wang
Keyword(s):  
Solid Solution ◽  
Energy Spectrum ◽  
Chemical Analysis ◽  
Electron Probe ◽  
X Ray Diffraction ◽  
Electron Microscopic ◽  
X Ray ◽  
Metallic Mineral ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

In order to study the phase of Fe and Ti in a beach placer , different methods such as the X-ray diffraction analysis, chemical analysis, scanning electron microscopic , electron probe microanalysis are used to study the characteristics of the beach placer . The research results show the major metallic mineral in the beach placer is titanic magnetite, EDS and energy spectrum map features of which indicate that the vast majority of titanic magnetite contain a certain amount of Ti , the two elements of Fe and Ti take on closely symbiosis and distribute more evenly in titanic magnetite. The Ti exists in the Magnetite lattice in form of isomorphism. The theoretical highest grade of Fe and Ti in the separated Magnetic concentrate are 66.02per cent and 4.86 per cent respectively. In addition, the beach placer contains a small quantity of Ilmenite which is hysterogenic and exists in the form of fine solid solution separation structure in the titanic magnetite

MgCu4(SO4)2(OH)6 · 6H2O, the magnesium analogue of ktenasite from the Casualidad mine near Baños de Alhamilla, Almeria, Spain

2020 ◽  
Author(s):  
Jochen Schlüter ◽  
Thomas Malcherek ◽  
Boriana Mihailova ◽  
Christian Rewitzer ◽  
Rupert Hochleitner ◽  
...  
Keyword(s):  
Refractive Index ◽  
Chemical Composition ◽  
Electron Probe ◽  
New Mineral ◽  
Environmental Sciences ◽  
Unit Cell Parameters ◽  
Single Crystal Diffraction ◽  
X Ray ◽  
Cell Parameters ◽  
Perfect Cleavage

The new mineral fehrite (IMA 2018-125a), MgCu4(SO4)2(OH)6 · 6H2O, is a member of the ktenasite group andthe Mg-analogue of ktenasite, ZnCu4(SO4)2(OH)6 · 6H2O. The mineral was found in the Casualidad mine near Baños deAlhamilla, Almeria, Spain, in association with clinoatacamite, kapellasite, gordaite, serpierite, connellite and gypsum.The transparent turquoise-coloured mineral has a vitreous lustre, exhibits a pale blue-green streak and shows distinctpleochroism. It forms radial aggregates of thin lath-like crystals of up to 200 μm in length. Fehrite is not fluorescent. Themonoclinic crystals show a perfect cleavage parallel to {001}. The mineral has a brittle tenacity and an uneven fracture. Thecalculated density is 2.73 g/cm3, the calculated mean refractive index is 1.584. The strongest lines observed in the X-raypowder diffraction pattern are [d in Å/Irel in %/(hkl)] 11.94/100/002, 5.92/31/004, 2.66/12/202, 4.85/11/013, 3.93/11/006and 2.96/10/008. The chemical composition, measured by means of an electron probe micro-analyser, was determined at(wt.%): MgO 5.31, MnO 0.49, CuO 33.12, ZnO 11.48, SO3 26.01, H2Ocalc. 24.63, total 101.04. The empirical formula basedon 20 O pfu., including 6(OH) and 6(H2O), is Mg0.87Cu2.74Zn0.93Mn0.05S2.14O8(OH)6 · 6H2O. The simplified end memberformula is MgCu4(SO4)2(OH)6 · 6H2O which requires MgO 5.92, CuO 46.74, SO3 23.52, H2O 23.82, total 100.00 (wt.%).Fehrite is monoclinic with space group P21/c (#14). Unit cell parameters determined by X-ray single crystal diffraction area = 5.6062(8), b = 6.1294(11), c = 23.834(3) Å, β = 95.29(1)º, V = 815.5(2) Å3, Z = 2. The mineral is isotypic with ktenasitewith Mg in place of Zn. The name is for the late Karl Thomas Fehr (1954 – 2014), Professor of Mineralogy at the Departmentof Geo- and Environmental Sciences at the Ludwig-Maximilians-University Munich, Germany.

Microanalytical techniques for phenotyping secondary xylem

IAWA Journal ◽  
2020 ◽  
Vol 41 (3) ◽  
pp. 356-389
Author(s):  
Nadeeshani Karannagoda ◽  
Antanas Spokevicius ◽  
Steven Hussey ◽  
Gerd Bossinger
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cell Wall ◽  
Chemical Composition ◽  
Light Microscopy ◽  
Secondary Xylem ◽  
Laser Scanning Microscopy ◽  
X Ray ◽  
Secondary Tissue ◽  
Scanning Electron

Abstract The products of secondary xylem are of significant biological and commercial importance, and as a result, the biology of secondary growth and how intrinsic and extrinsic factors influence this process have been the subject of intense investigation. Studies into secondary xylem range in scale from the cellular to the forest stand level, with phenotypic analyses often involving the assessment of traits relating to cell morphology and cell wall chemical composition. While numerous techniques are currently available for phenotypic analyses of samples containing abundant amounts of secondary tissue, only a few of them (microanalytical techniques) are suitable when working with limiting amounts of secondary tissue or where a fine-scale resolution of morphological features or cell wall chemical composition is required. While polarised light microscopy, scanning electron microscopy, field emission-scanning electron microscopy and X-ray scattering and micro-tomography techniques serve as the most frequently used microanalytical techniques in morphotyping, techniques such as scanning ultraviolet microspectrophotometry, X-ray photoelectron spectroscopy, gas chromatography, Fourier-transform infrared spectroscopy and matrix-assisted laser desorption ionisation mass spectrometry serve as the most commonly used microanalytical techniques in chemotyping. Light microscopy, fluorescence microscopy, confocal laser scanning microscopy, transmission electron microscopy and Raman spectroscopy serve as dual micro morphotyping and chemotyping techniques. In this review, we summarise and discuss these techniques in the light of their applicability as microanalytical techniques to study secondary xylem.

Study on Gemological and Mineralogy Features of Huanglong Jade

2011 ◽  
Vol 492 ◽  
pp. 388-391
Author(s):  
Jun Zhao ◽  
En Dong Zu ◽  
Dong Ye ◽  
Nan Yu Shen
Keyword(s):  
Trace Elements ◽  
Refractive Index ◽  
Chemical Composition ◽  
Relative Density ◽  
Electron Probe ◽  
X Ray ◽  
Field Samples ◽  
Main Chemical Composition

The Huanglong jade of Zhen’an, Xiaoheishan, Supa river these three fields in Longling Yunnan were detected by general gem identify instruments. The Moh's hardness is 6.5-7, relative density is 2.60(+0.10, -0.05)g/cm3 and the refractive index is 1.53±. The electron probe backscatter atlas of samples shows that Huanglong jade is a kind of cryptocrystalline mineral aggregation. Using electron probe and X-ray spectrometer tested different field samples, got that the main chemical composition of Huanglong jade is SiO2, furthermore, including same trace elements as K, Cr, Fe, As and so on. Finally judged that Huanglong jade is a kind of cryptocrystalline (or micro show crystal) mineral aggregation which mainly formed of SiO2, named yellow chalcedony (Huanglong jade).

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