scholarly journals Differential X-Ray Attenuation in MA-XRF Analysis for a Non-invasive Determination of Gilding Thickness

2020 ◽  
Vol 8 ◽  
Author(s):  
Sergio Augusto Barcellos Lins ◽  
Stefano Ridolfi ◽  
Giovanni Ettore Gigante ◽  
Roberto Cesareo ◽  
Monica Albini ◽  
...  
Keyword(s):  
X Ray ◽  
Xrf Analysis ◽  
Non Invasive

scholarly journals Accuracy improvement in XRF analysis for the quantification of elements ranging from tenths to thousands μg g−1 in human tissues using different matrix reference materials

2020 ◽  
Vol 35 (12) ◽  
pp. 2920-2927
Author(s):  
Jorge Machado ◽  
Patrícia Miguel Carvalho ◽  
Ana Félix ◽  
Delfin Doutel ◽  
José Paulo Santos ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Reference Materials ◽  
Fluorescence Spectrometry ◽  
Human Tissues ◽  
Accuracy Improvement ◽  
External Calibration ◽  
X Ray ◽  
Xrf Analysis ◽  
Calibration Approach

In this work, we aim at achieving the most accurate quantitative determination of elements in human tissues by means of X-ray fluorescence spectrometry using the external calibration approach.

scholarly journals Non Invasive XRF Analysis of Human Hair for Health State Determination of Breast Tissue

2015 ◽  
Vol 8 (6) ◽  
Author(s):  
Asghar Maziar ◽  
Daryoush Shahbazi-Gahrouei ◽  
Mohammad Bagher Tavakoli ◽  
Vahid Changizi
Keyword(s):  
Human Hair ◽  
Breast Tissue ◽  
Health State ◽  
Xrf Analysis ◽  
Non Invasive ◽  
State Determination

scholarly journals DIAGNOSTIC TACTICS FOR TRAUMATIC INJURIES OF THE SPLEEN

2020 ◽  
pp. 155-159
Author(s):  
M. M. Belous
Keyword(s):  
Minimally Invasive ◽  
Information Content ◽  
Diagnostic Method ◽  
Diagnostic Methods ◽  
Traumatic Injuries ◽  
X Ray ◽  
Non Invasive ◽  
Examination Methods ◽  
Minimally Invasive Methods

Summary. Purpose. Having based on the determination of the degree of effectiveness and information content of the diagnostic methods for traumatic injuries of the spleen, to analyze the results of the instrumental diagnostic methods to create an algorithm for diagnostic and treatment tactics. Materials and methods: 355 victims were hospitalized with traumatic injuries of the spleen. Of these, physical and laboratory diagnostic methods were used in 100 % of cases, laparoscopy — 245 patients (69 %), laparocentesis — 21 (6 %), laparotomy —- 75 (21 %), ultrasound — 199 (56 %), x-ray — 67 (19 %), CT — 7 (2 %). Research results and discussion.The most informative diagnostic method is laparotomy. Of minimally invasive methods — laparoscopy, and of non-invasive methods — ultrasound. Conclusions. For successful recognition of spleen damage, it is necessary to use complex examination methods, depending on the indication developed for them, that significantly reduces the duration of the diagnostic phase.

X-ray fluorescence determination of Ni, Ti and Nb in memory alloys using solution and thin film samples with an internal standard

2019 ◽  
Vol 11 (28) ◽  
pp. 3619-3622
Author(s):  
L. F. Tian ◽  
Y. C. Dai ◽  
D. S. Zou ◽  
T. C. Lei ◽  
S. K. Huang
Keyword(s):  
Thin Film ◽  
Filter Paper ◽  
Internal Standard ◽  
X Ray ◽  
Xrf Analysis ◽  
Fluorescence Determination ◽  
Paper Disk ◽  
Filter Paper Disk

Specimen for XRF analysis of high content of Ni, Ti and Nb in memory alloys, prepared by solution (a) and a filter paper disk (b).

scholarly journals Non-Invasive Approaches for the Evaluation of the Functionalization of Melamine Foams with In-Situ Synthesized Silver Nanoparticles

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 996 ◽  
Author(s):  
Suset Barroso-Solares ◽  
Paula Cimavilla-Roman ◽  
Miguel Angel Rodriguez-Perez ◽  
Javier Pinto
Keyword(s):  
Polymeric Nanocomposites ◽  
Free Standing ◽  
X Ray ◽  
Color Changes ◽  
Non Invasive ◽  
Silver Nps ◽  
Promising Solution ◽  
The Stability

The use of polymeric nanocomposites has arisen as a promising solution to take advantage of the properties of nanoparticles (NPs) in diverse applications (e.g., water treatment, catalysis), while overcoming the drawbacks of free-standing nanoparticles (e.g., aggregation or accidental release). In most of the cases, the amount and size of the NPs will affect the stability of the composite as well as their performance. Therefore, a detailed characterization of the NPs present on the nanocomposites, including their quantification, is of vital importance for the optimization of these systems. However, the determination of the NPs load is often carried out by destructive techniques such as TGA or ICP-OES, the development of non-invasive approaches to that aim being necessary. In this work, the amount of silver NPs synthesized directly on the surface of melamine (ME) foams is studied using two non-invasive approaches: colorimetry and X-ray radiography. The obtained results show that the amount of silver NPs can be successfully determined from the luminosity and global color changes of the surface of the foams, as well as from the X-ray attenuance.

Energy-Dispersive X-Ray Techniques for Accurate Heavy Element Assay

1986 ◽  
Vol 30 ◽  
pp. 285-292 ◽  
Author(s):  
H. Ottmar ◽  
H. Eberle ◽  
P. Matussek ◽  
I. Michel-Piper
Keyword(s):  
Absorption Edge ◽  
Heavy Element ◽  
Accurate Determination ◽  
Energy Dispersive ◽  
X Rays ◽  
Specific Absorption ◽  
X Ray ◽  
Xrf Analysis ◽  
Analysis Technique

Energy-dispersive X-ray techniques can be employed in two different ways for the accurate determination of element concentrations in specimens: (1) spectrometry of fluoresced characteristic X-rays as widely applied in the various modes of the traditional XRF analysis technique, and (2) spectrometry of the energy-differential transmittance of an X-ray continuum at the element-specific absorption-edge energies.

scholarly journals Diagnostic possibilities for autoimmune thyroiditis using non-invasive determination of intrathyroid iodine concentration in children

2019 ◽  
Vol 45 (1) ◽  
pp. 21-23
Author(s):  
I. A. Vasilevskaya ◽  
I. O. Tomashevsky
Keyword(s):  
Enzyme Immunoassay ◽  
Case History ◽  
Autoimmune Thyroiditis ◽  
Microsomal Fraction ◽  
Iodine Concentration ◽  
Threshold Level ◽  
X Ray ◽  
Non Invasive ◽  
Stable Iodine

Sixty-seven children (55 girls and 12 boys) aged 5-16 years were examined. Autoimmune thyroiditis (AT) was diagnosed in 28 and diffuse nontoxic goiter (DNG) in 39. The diseases were diagnosed on the basis of case history, results of examination and palpation of the thyroid, ultrasonic findings, presence of antibodies to thyroglobulin (in AT) or their absence (in DNG), and the microsomal fraction detected by enzyme immunoassay using Boehringer Mannheim kits. AT diagnosis was confirmed cytomorphologically in all patients. Intrathyroid stable iodine (ISI) was measured by a Russian noninvasive x-ray fluorescent analyzer. ISI concentration was notably decreased in children with autoimmune thyroiditis confirmed by cytomorphological methods: below the threshold level of the method in 46%) cases and 120±10 mcg/g in 54%). This confirms a high informative value of the proposed method in this disease. Measurements of ISI in children with enlarged thyroid helps differentiate the hypertrophic form of AT from DNG: ISI concentration under 200 mcg/g is characteristic of AT, while in DNG the concentration of ISI in Moscow children is 500±40 mcg/g (M±m).

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