Results 81 to 90 of about 7,349 (250)

A Portable Radioisotope X-Ray Fluorescence Analyzer and Its Applications

RADIOISOTOPES, 1971
最近開発したポータブルRI線源螢光X線分析計とその鉱工業利用に関する研究について報告する。装置は測定プローブと電子回路部からなり, それぞれの重さは1.7kgおよび7kgである。X線分光法は, 比例計数管によるエネルギー分析を基本とし, 必要なばあいX線フィルターを用いる。現場で用いるときは, 測定元素の特性X線をスイッチの切換えで選択できる構造をもっている。この装置により合金, 鉱石その他の分析を行なった。鉱石試料の実験では, 元素量1%以上では通常, マトリックス補正なしの一次検量線を使用することができ, 平均濃度1%に対し, 相対誤差10%, 平均濃度15%以上に対し相対誤差3%以内という結果を得た。アルミ合金中のCu, 合金鋼中のV, Zr, Moにおいて, 10ppmオーダーの検出限界を,
TANEMURA, Takashi, SUITA, Hiroshi, YAMAMOTO, Hidenobu   +2 more
openaire   +2 more sources

FLUORESCÊNCIA DE RAIOS X POR DISPERSÃO DE ENERGIA APLICADA À CARACTERIZAÇÃO DE TIJOLOS DE SÍTIOS HISTÓRICOS DE PERNAMBUCO

Clio Arqueológica, 2019
No presente trabalho são 1 apresentados os resultados de estudos por fluorescência de raios X de tijolos brasileiros. Neste estudo foram avaliados 22 tijolos, sendo sete de Igarassu, dois do Forte do Brum e 13 de Olinda.
Helen Jamil Khoury, Roberto Araújo, Sandra de Brito Barreto, Viviane Khoury Asfora   +3 more
doaj   +1 more source

Structure and Spectroscopic Characterisation of Phenanthroline‐Based Iodobismuthate(III) Complexes Utilised for Raw Acoustic Signal Classification

Advanced Intelligent Discovery, EarlyView.
Memristors based on trimethylsulfonium (phenanthroline)tetraiodobismuthate have been utilised as a nonlinear node in a delayed feedback reservoir. This system allowed an efficient classification of acoustic signals, namely differentiation of vocalisation of the brushtail possum (Trichosurus vulpecula).
Ewelina Cechosz, Gisya Abdi, Andrzej Sławek, Marlena Gryl, Konrad Szaciłowski   +4 more
wiley   +1 more source

Validation of in vivo toenail measurements of manganese and mercury using a portable X-ray fluorescence device. [PDF]

J Expo Sci Environ Epidemiol, 2022
Specht AJ, Zhang X, Young A, Nguyen VT, Christiani DC, Ceballos DM, Allen JG, Weuve J, Nie LH, Weisskopf MG.   +9 more
europepmc   +1 more source

Evaluation of Artifacts Produced by a Commercial Portable XRF Device and their Influence on the Analysis of Artworks

Semina: Ciências Exatas e Tecnológicas
This study investigates the origin and impact of spectral interferences associated with the Bruker Tracer III portable X-ray fluorescence (pXRF) spectrometer, used by the authors for elemental characterization of cultural heritage objects.
Roberta Manon de Paula Sales Borges, Josiane Emerich Cavalcante, Isis Verona Nascimento da Silva Franzi, Anderson Gomes de Paula, Evelyne Azevedo, Ricardo Tadeu Lopes, Davi Ferreira de Oliveira   +6 more
doaj   +1 more source

Accelerating Biosensor Discovery: A Computationally‐Driven Pipeline for Microplastics Monitoring

Advanced Intelligent Discovery, EarlyView.
A computationally guided pipeline unites molecular simulation, synthetic biology, electrochemical engineering, and machine learning to accelerate biosensor discovery. A Bacillus anthracis carbohydrate‐binding module is used to develop a high‐performance micro‐ and nanoplastics sensor with greatly reduced error and variability.
Gabriel X. Pereira, Marcos de C. Leite, Pedro H. M. Zanineli, Juliana N. Y. Costa, Débora M. Cunha, Sophia P. Serra, Pedro H. Sophia, Flávio M. Shimizu, Yasmin W. Moura, Célio C. Oliveira, Gabriel R. Schleder, Gabriela F. Persinoti, Leandro Merces, Renato S. Lima   +13 more
wiley   +1 more source

Portable X-ray fluorescence (pXRF) calibration for analysis of nutrient concentrations and trace element contaminants in fertilisers. [PDF]

PLoS One, 2022
Acquah GE, Hernandez-Allica J, Thomas CL, Dunham SJ, Towett EK, Drake LB, Shepherd KD, McGrath SP, Haefele SM.   +8 more
europepmc   +1 more source

Fluorescent Hydrogel‐Based Strain Sensor With Machine Learning‐Augmented Performance

Advanced Intelligent Discovery, EarlyView.
Fluorescent hydrogel strain sensor based on carbon quantum dots enabling optical readout of deformation through strain‐dependent emission changes, coupled with Random Forest analysis to capture nonlinear fluorescence‐concentration relationships and identify optimal sensing conditions. Hydrogels are ideal matrices for bio‐integrated wearable sensors due
Tailai Chen, Tianlong Liu, Chao Lu, Rimsha Malik, Jin Zhang   +4 more
wiley   +1 more source

Portable X-ray fluorescence (pXRF) analysis of heavy metal contamination in church graveyards with contrasting soil types. [PDF]

Environ Sci Pollut Res Int, 2022
Madden C, Pringle JK, Jeffery AJ, Wisniewski KD, Heaton V, Oliver IW, Glanville H, Stimpson IG, Dick HC, Eeley M, Goodwin J.   +10 more
europepmc   +1 more source

Poseidon's Sanctuary at Samikon—The Discovery of an Ancient Temple Through an Integrated Geophysical and Geoarchaeological Survey Approach for Lagoonal and Swampy Environments

Archaeological Prospection, EarlyView.
ABSTRACT Below the classical fortress of Samikon at the coast of the western Peloponnese, ancient writer Strabo mentioned a sanctuary of Poseidon which served as the centre of the religious association of the Triphylian cities. In this paper, we describe the discovery and investigation of a building structure by means of geophysical and ...
Dennis Wilken, Birgitta Eder, Sarah Bäumler, Elena Appel, Peter Fischer, Tina Georg, Federica Iannone, Lena Slabon, Timo Willershäuser, Erofili‐Iris Kolia, Andreas Vött   +10 more
wiley   +1 more source