Results 31 to 40 of about 59,923 (299)

La metalurgia de la necrópolis siciliana del Bronce Final/Primera Edad del Hierro de Madonna del Piano (Catania, Sicilia)

Trabajos de Prehistoria, 2010
El artículo presenta el resultado de los análisis realizados a los metales de base cobre de la importante necrópolis siciliana de Madonna del Piano, próxima a Grammichele (Catania), fechada entre el Bronce Final 2 y la Primera Edad del Hierro IA.
Alessandra Giumlia-Mair, Rosa Maria Albanese Procelli, Fulvia Lo Schiavo   +2 more
doaj   +1 more source

Analysis of South America coins of the XIX and XX centuries by XRF technique

Brazilian Journal of Radiation Sciences, 2021
In this work, the elemental composition of 21 coins from nineteenth and twenty centuries of South America belonging to a private collection were performed using the X-Ray Fluorescence (XRF).
Raysa Costa Nardes
doaj   +1 more source

The First Two Host Galaxies of X‐Ray Flashes: XRF 011030 and XRF 020427 [PDF]

The Astrophysical Journal, 2003
15 pages, 1 color figure. Revised following comments from the referee and references updated.
Bloom, J. S., Fox, D., van Dokkum, P. G., Kulkarni, S. R., Berger, E., Djorgovski, S. G., Frail, D. A.   +6 more
openaire   +4 more sources

Influence of compression on soil characterization by X ray fluorescence

Semina: Ciências Exatas e Tecnológicas, 2018
The study of soil mineralogy has been highlighted in recent years, as well as the search for alternative analytical techniques for soil analysis. The classical methods for determination of total oxides in soil expose the analyst to chemical hazards and ...
Yasmin Vieira, Mara Regina Linck, Delton Luiz Gobbi, Lucas Brandalise Menezes, Fernanda Da Silva Vilasbôas   +4 more
doaj   +1 more source

Elemental Concentration and Sulfur Chemical Speciation in the Amazonian Plant Andira surinamensis Using Synchrotron Radiation Techniques (SR-XRF, XANES), RBS and WD-XRF

, 2019
The inorganic composition of the bark and leaf of a plant from the Amazon rainforest, Andira surinamensis, was determined using two non-destructive, multi-element techniques: X-ray fluorescence (XRF) and Rutherford backscattering spectrometry (RBS).
Rafael B. Bernini (7393748), Lúcia H. Coutinho (7393751), Cecilia V. Nunez (6746483), Flavio C. Vicentin (7393757), Joselaine C. Gonzalez (7393742), Gerardo G. B. de Souza (7393760), Grazieli Simões (7393745), Fernanda C. Stedile (7393754)   +7 more
core   +1 more source

Electron‐Deficient Linkers Enhance H2O2 Electrosynthesis in Covalent Organic Frameworks

Advanced Functional Materials, EarlyView.
Linker π‐conjugation modulates the electronic state of the Ni–N4 centers and their interaction with the key *OOH intermediate while preserving the primary coordination motif. NiPc‐PTDA delivers an H2O2 selectivity of 92% and a production rate of 34.8 mol gcat−1 h−1, highlighting linker electronic properties as a molecular design parameter for NiPc ...
Houting Xie, Rui Guo, Zhen Liu, Yang Hu, Laichun Zhao, Omid Mazaheri, Bufeng Zhang, Shuaijun Pan   +7 more
wiley   +1 more source

XRF-scanned elemental concentrations from sediment cores off Peru

, 2013
We present a high-resolution marine record of sediment input from the Guayas River, Ecuador, that reflects changes in precipitation along western equatorial South America during the last 18ka.
Schneider, Ralph R, Mollier-Vogel, Elfi, Martinez, Philippe, Böschen, Tebke, Tebke Böschen (8006156), Guillaume Leduc (6978800), Elfi Mollier-Vogel (6975302), Leduc, Guillaume, Ralph R Schneider (6958787), Philippe Martinez (3629767)   +9 more
core   +1 more source

randazn/Geochemical-Correlation-of-ED-XRF-Data-from-Turonian-Age-Bentonites-from-the-Mancos-Shale-Utah-and-: Geochemical-Correlation-of-ED-XRF-Data-from-Turonian-Age-Bentonites-from-the-Mancos-Shale-Utah-and-New-Mexico

, 2021
RCode for assessing whether bentonites from the Mancos Shale can be geochemically correlated using ED-XRF. This code allows for the calculation of correlation matrices for 57 elements between Al and U as well as Principal Component Analysis, Scree plots,
randazn
core   +1 more source

Unique Role of Microstructure of a Bioimplant Zinc Alloy and Protein Content of Simulated Body Fluid in Corrosion and Fracture

Advanced Functional Materials, EarlyView.
BSA addition to physiological solutions enhances resistance of a Zn alloy to stress corrosion cracking (SCC) but reduces its corrosion resistance. Extended surface characterization explains the contrasting influences on corrosion and SCC. Unexpectedly, the alloy suffers transgranular SCC (TGSCC), despite extensive grain boundary precipitation. Thorough
RK Singh Raman, Syed Hussain Wajahat, Saad Al‐Saadi, Robin E. Schäublin, Peng Zeng, Solomon Ansah, Jixing Lin, Xian Tong, Cuie Wen, Jörg F. Löffler   +9 more
wiley   +1 more source

Lewis Acid Site Engineering in MOF‐Derived Aluminum Oxide/Carbon Composites for Dechlorination of Waste Plastic Pyrolysis Oil

Advanced Functional Materials, EarlyView.
Controlled carbonization of an Al‐MOF partially decomposes its linkers, exposing coordinatively unsaturated Al centers within an oxide/carbon composite. The resulting Lewis acid sites, rather than surface area, govern organochlorine capture: the composite removes chemically diverse organochlorines from waste plastic pyrolysis oil, outperforms a ...
Seong Cheon Kim, Byeongju Jeon, Suk Hyun Lim, Eun Hee Kwon, Nam Sun Nho, Siyoung Q. Choi, Jeasung Park   +6 more
wiley   +1 more source