Results 131 to 140 of about 65,019 (260)

Spectroscopic techniques in the investigation of extraordinary medieval Polish coins: Revealing the presence of hidden cores

Nukleonika
Cross denars, frequently found in Polish hoards, were traditionally thought to be Ag coins with some Cu content. This study investigates the possibility of a hidden Cu core beneath the Ag or Ag–Cu surface of these coins. It raises questions about whether
Trela Krystian, Gójska Aneta Maria, Miśta-Jakubowska Ewelina A., Kelemen Mitja, Šmit Žiga, Kędzierski Adam, Garbacz-Klempka Aldona   +6 more
doaj   +1 more source

Evidence of Middle Holocene landslide-generated tsunamis recorded in lake sediments from Saqqaq, West Greenland [PDF]

Natural Hazards and Earth System Sciences
The Vaigat strait (Sullorsuaq) in West Greenland is well known for its susceptibility to landslides and historical landslide-generated tsunamis. Recent mapping of the seabed in the Vaigat strait has revealed several prehistoric giga-scale (volumes of 109 
N. J. Korsgaard, K. Svennevig, A. S. Søndergaard, G. Luetzenburg, G. Luetzenburg, M. Oksman, N. K. Larsen   +6 more
doaj   +1 more source

Effect of the Fe Content on the Oxide Film Composition and Corrosion Resistance of Inconel 625: An XPS and Cyclic Potentiodynamic Polarisation Study

Surface and Interface Analysis, Volume 58, Issue 3, Page 151-163, March 2026.
ABSTRACT The present work focuses on investigating the effect of increasing Inconel 625 Fe content on the oxide film composition and corrosion behaviour through XPS and cyclic potentiodynamic polarisation (CPP) studies. Different proportions of ASTM A182 F22 steel and Inconel 625 were arc‐melted to achieve a range of Fe contents (2–15 wt.%) in the ...
J. C. Lourenço, P. Bhuyan, M. I. S. T. Faria, C. A. Nunes, C. R. Tomachuk, M. A. Baker   +5 more
wiley   +1 more source

A New Surface Rupture of the 1556 Huaxian M ∼ 8.5 Earthquake Revealed by Rock Surface Luminescence Dating of a Bedrock Fault Scarp and Colluvial Wedges

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Bedrock fault scarps and their associated colluvial wedges provide key evidence for reconstructing paleoearthquakes. We apply rock surface luminescence dating to a bedrock scarp on the Huashan fault in central China, using OSL‐depth profiles (DPs) from multiple heights. Results reveal two coseismic displacements of 6.8 and >1.0 m.
Ming Luo, Jie Chen, Zhijun Gong, Lewis A. Owen, Huili Yang, Xiaohong Jiang, Jinhui Yin, Wei Xu, Hua Wang   +8 more
wiley   +1 more source

Base metal mineralisation associated with Ordovician shales in south-west Scotland [PDF]

, 1984
Several narrow, lenticular belts of black cherty mudstone and siltstone (the Moffat Shales), alternating with thick greywacke sequences, strike north-east to south-west across Galloway with uniformly steep dip.
Jones, R.C., Leake, R.C., Stone, P.
core  

Orbital timescale CaCO3 burial and dissolution changes off the Chilean margin in the subantarctic Pacific over the past 140 kyr

Progress in Earth and Planetary Science
Calcium carbonate (CaCO3) dissolution at the Southern Ocean seafloor has hypothetically contributed to lowering the atmospheric carbon dioxide concentration by increasing ocean alkalinity during glacial periods.
Takuto Kasuya, Yusuke Okazaki, Shinya Iwasaki, Kana Nagashima, Katsunori Kimoto, Frank Lamy, Julia R. Hagemann, Lester Lembke-Jene, Helge W. Arz, Masafumi Murayama, Carina B. Lange, Naomi Harada   +11 more
doaj   +1 more source

Assessment of SiO₂ Nanotube Activity to Modify DL α-Tocopherol via ¹O₂ Generation Under Visible Light Irradiation

Micromachines
This work investigates photoactive inorganic powders (SiO2, IrSiO2, and IrO2/IrSiO2) and their derivatives modified with metallated porphyrin, focusing on their ability to generate reactive oxygen species (ROS) under visible light exposure.
Mihai Anastasescu, Radu Socoteanu, Veronica Bratan, Silviu Preda, Crina Anastasescu, Ioana Cătălina Gîfu, Cristina Lavinia Nistor, Rica Boscencu, Emilian Chifor, Catalin Negrila, Ion Bordeianu, Maria Zaharescu, Ioan Balint   +12 more
doaj   +1 more source

Small is the New Large: Demonstration of how Microanalyses Elucidate Large‐Scale CO2 Uptake Through Mineralization

Advanced Sustainable Systems, Volume 10, Issue 2, February 2026.
Imaging techniques like X‐ray microcomputed tomography and electron microscopy are integrated to understand the CO2 mineralization process at the pore‐scale. These techniques are used to characterise the reaction progression in basalt. They increase the reliability of reactive transport modeling and consequently improve the CO2 storage capacity ...
Faisal W. K. Khudhur, Ian B. Butler, Stuart M. V. Gilfillan   +2 more
wiley   +1 more source

Exploring the Parameter Space of Colloidal High‐Entropy Alloy Synthesis Methods

ChemistryEurope, Volume 4, Issue 2, February 2026.
We present a systematic study of the parameter space of a simple colloidal synthesis method in which high‐entropy alloy (HEA) nanoparticles (NPs) are formed in triethylene glycol. Ultra‐small (1‐3 nm), single‐phase HEA nanoparticles are obtained via a hot‐injection approach.
Danielle Getz, Tobias Mølgaard Nielsen, Cecilie Bush Krogh, Adrián Sanz Arjona, Rebekka Klemmt, Rasmus Rohde, Espen Drath Bøjesen, Kirsten M. Ø. Jensen   +7 more
wiley   +1 more source

Mechanisms of near‐normal sea water dolomitisation: Mesohaline‐reflux or syn‐depositional?

The Depositional Record, Volume 12, Issue 1, February 2026.
This study investigates the dolomitisation of the Eocene Dammam Formation on the Arabian Plate using petrographic, mineralogical, geochemical and isotopic analyses. The findings reveal two distinct dolomite types, formed primarily through normal‐to‐mesohaline sea water dolomitisation, challenging previous models such as sabkha‐meteoric mixing.
Misbahu Abdullahi, Adhipa Herlambang, Khalid Al‐Ramadan, Ardiansyah Koeshidayatullah   +3 more
wiley   +1 more source