Results 71 to 80 of about 2,001 (220)

XRF, PIXE and SR-XRF studies on prehistoric gold provenance

UISPP Journal, 2019
One of the most efficient methods to authenticate ancient gold artifacts and find their provenance is to identify trace elements – Sn, Sb, Te, PGA (especially Pt, Ir-Os, Pd), considered as “fingerprints” of a geological source, as ancient metallurgy ...
Bogdan Costantinescu, Daniela Cristea-Stan   +1 more
doaj   +1 more source

A Mineralogical Context for the Organic Matter in the Paris Meteorite Determined by A Multi-Technique Analysis

Life, 2019
This study is a multi-technique investigation of the Paris carbonaceous chondrite directly applied on two selected 500 × 500 µm² areas of a millimetric fragment, without any chemical extraction.
Manale Noun, Donia Baklouti, Rosario Brunetto, Ferenc Borondics, Thomas Calligaro, Zélia Dionnet, Louis Le Sergeant d’Hendecourt, Bilal Nsouli, Isabelle Ribaud, Mohamad Roumie, Serge Della-Negra   +10 more
doaj   +1 more source

PIXE micro-PIXE and RBS analysis of thermal aged rubber material : on the additive behaviour versus aging time

, 2002
BIA
Dole, P., Jaksic, M., Nasreddine, M., Nsouli, B., Pastuovic, Z., Roumie, M., Thomas, J.-P., Zaharaman, K.   +7 more
core   +1 more source

Bulk composition of the Kaba meteorite by ICP OES and ICP MS [PDF]

, 2019
The Tenth Symposium on Polar Science/Poster presentations: [OA] Antarctic meteorites, Wed. 4 Dec.
Aron Soos, Arpad Csamer, Bela Kovacs, David Nagy, Erika Nyeste, Gabor Zelei, Gucsik Arnold, Jozsef Posta, Jozsef Vanyo   +8 more
core   +1 more source

Nitrogen determination in micas of metamorphic rocks [PDF]

, 2005
6 pages, 1 table, 1 figure.-- Proceedings of the Seventeenth International Conference on Ion Beam Analysis.-- El pdf del artículo es la versión post-print.-- et al.Micas are minerals that provide large amounts of information regarding geological ...
Ager, F.J., Mata, M.P., Ynsa, M.D., Respaldiza, M.A., Goffé, B., Nieto, F.   +5 more
core   +1 more source

Major and Trace Element Composition Differences Revealed in Porcine Intestine by Dynamic Analysis and MeV Ion Microscopy

physica status solidi (a), Volume 222, Issue 12, June 2025.
Herein, C, N, and Ca concentration images in dry porcine intestine are used to determine trace element concentrations ex vivo. Physiologically relevant concentrations in biological tissue, in the in vivo, state are of the order of μmol L−1 and mmol L−1.
Harry J. Whitlow, Gyula Nagy, Andrej Kuznetsov, Robert J.W. Frost, Alexander Azarov, Karen M. Smith, Sumittra Amphalop, Wimonrut Insuan, Sakulchit Wichianchot, Min‐Quin Ren, Thomas Osipowicz, Chris G. Ryan, Wanwisa Sudprasert, Francois Villinger   +13 more
wiley   +1 more source

Direct Dating and Physico-Chemical Analyses Cast Doubts on the Coexistence of Humans and Dwarf Hippos in Cyprus.

PLoS ONE, 2015
In the Mediterranean, the island dwarf megafaunas became extinct around the end of the Pleistocene, during a period of rapid and global climate change. In Cyprus, this coincided with the first human presence on the island, as attested by the rock shelter
Antoine Zazzo, Matthieu Lebon, Anita Quiles, Ina Reiche, Jean-Denis Vigne   +4 more
doaj   +1 more source

Lifespan differences between queens and workers are not explained by rates of molecular damage. [PDF]

, 2017
The biological processes that underlie senescence are of universal biological importance, yet they remain poorly understood. A popular theory proposes that senescence is the result of limited investment into mechanisms involved in the prevention and ...
Augustyniak, M., Keller, L., Kędziorski, A., Lucas, E.R.   +3 more
core   +1 more source

Chasing (macro)elements in microinvertebrates: A new methodological approach for quantitative and qualitative analyses of phosphorus by PIXE (Particle‐Induced X‐Ray Emission) applied to glacier tardigrades

Methods in Ecology and Evolution, Volume 16, Issue 6, Page 1160-1172, June 2025.
Abstract Microinvertebrates in harsh environments often occupy the highest trophic levels and directly influence the turnover of macroelements. However, the investigation of their body elemental composition is complicated due to their low dry weight or sample size hindering the application of established methodological approaches.
Tereza Novotná Jaroměřská, Vladimír Havránek, David Novotný, Krzysztof Zawierucha, Oleksandr Romanenko, Jakub Štenc, Lenka Vondrovicová, Marie Fayadová, Jakub Trubač   +8 more
wiley   +1 more source

Una revisión de los discos de Fortios

Trabajos de Prehistoria, 2017
Hemos empleado fluorescencia de rayos X por energía dispersiva (EDXRF), emisión de rayos X inducida por partículas (Micro-PIXE) y microscopía (análisis metalográfico), complementada con microscopia electrónica de barrido y espectroscopia de rayos X en ...
António M. Monge Soares, Pedro Valério, Rui J. C. Silva, Luis Cerqueira Alves, Maria de Fátima Araújo   +4 more
doaj   +1 more source