Results 41 to 50 of about 633 (178)

Hematite Formation During Skarn Mineralization in the Akatani Iron Deposit, Niigata Prefecture, Japan

Resource Geology, Volume 76, Issue 1, January/December 2026.
The Akatani Fe deposit in NE Japan has been regarded as a skarn deposit because iron‐oxide ores occur within marble‐hosted skarn near the Cretaceous Ninoujidake granite. U–Pb dating of fluorapatite in the skarn indicates that this skarn formed in the Late Cretaceous, contemporaneous with the granite.
Kotaro Seno, Yasushi Watanabe, Takuya Echigo, Shogo Aoki, Keita Itano, Shota Satori, Yoshiaki Kon   +6 more
wiley   +1 more source

Effects of palm biodiesel and blends of biodiesel with organic acids on metals

Heliyon, 2020
This paper presents the corrosion behavior studies of five metallic materials used in auto part manufacturing exposed to pure palm biodiesel (B100) and palm biodiesel mixed with acidic species commonly found in biodiesel.
L.M. Baena, J.A. Calderón
doaj   +1 more source

Percent‐Level Copper Mineralisation Promoted by Copper‐Tolerant Iron‐Oxidising Bacteria in Circumneutral Mine Drainage

Environmental Microbiology, Volume 27, Issue 12, December 2025.
A neutrophilic Fe(II)‐oxidizing Gallionellaceae was isolated from circumneutral Cu mine drainage. It mediated Fe(III) biomineralization, resulting in pronounced Cu accumulation (up to 2 wt%) within the solid precipitates. ABSTRACT Geomicrobiology of copper (Cu) and iron (Fe) in circumneutral‐pH drainage from a Japanese Cu mine was investigated, with a ...
Kazuya Tanimoto, Shingo Kato, Kohei Tokunaga, Natsuko Hamamura, Moriya Ohkuma, Satoshi Mitsunobu   +5 more
wiley   +1 more source

P-Box: A RISC-V Packed-SIMD Approach of Accelerating Edge Workloads on Scalar Embedded Cores

IEEE Access
The growing need for data-parallel processing in edge devices demands efficient hardware acceleration for Digital Signal Processing (DSP), Computer Vision (CV), and Artificial Intelligence (AI) inference workloads.
Simi Sukumaran, Babu P. S., Neel Gala, Tripti S. Warrier   +3 more
doaj   +1 more source

Resonance Raman Effect in Copper Carbonate Minerals Azurite and Malachite

Journal of Raman Spectroscopy, Volume 56, Issue 11, Page 1154-1161, November 2025.
This study employs Raman spectroscopy to examine the vibrational characteristics of azurite and malachite, specifically focusing on the stretching modes of the carbonate anion present in their structures. The results reveal a potential resonance Raman effect, characterized by an unexpected enhancement of the asymmetric stretching mode compared to the ...
Julliana F. Alves, Linus Pauling F. Peixoto, Luiz Fernando Cappa de Oliveira   +2 more
wiley   +1 more source

Thermally Optimised Raman Spectroscopy for Safe Analysis of Wall Paintings and Application to Lorenzetti's Masterpiece

Journal of Raman Spectroscopy, Volume 56, Issue 9, Page 882-894, September 2025.
A portable dual‐wavelength Raman system (exc. 785 and 1064 nm) based on a four‐channel innovative probe for safe characterisation of artworks is presented. This instrument enables non‐contact real‐time monitoring of the temperature rise and laser power modulation to prevent overheating during Raman spectroscopy, through direct emissivity and ...
D. Ciofini, J. Agresti, M. Giamello, A. A. Mencaglia, A. Scala, M. Gavazzi, S. Siano, I. Osticioli   +7 more
wiley   +1 more source

Delineation of Copper Mineralization Zones at Wadi Ham, Northern Oman Mountains, United Arab Emirates Using Multispectral Landsat 8 (OLI) Data

Frontiers in Earth Science, 2020
Copper deposits in the ultramafic rocks of the Semail ophiolite massifs is found to be enormous in the region of northern Oman Mountains, United Arab Emirates.
Fares M. Howari, Habes Ghrefat, Yousef Nazzal, Mahmoud A. Galmed, Osman Abdelghany, Abdel Rahman Fowler, Manish Sharma, Fatima AlAydaroos, Cijo M. Xavier   +8 more
doaj   +1 more source

Sediment-Hosted Copper Mineralization in Bavanat Region, Southern Sanandaj-Sirjan, Iran [PDF]

Journal of Sciences, Islamic Republic of Iran, 2019
Sedimentary Copper mineralization has been observed in Monj and Jolany locations in Bavanat (Sanandaj – Sirjan metamorphic belt). According to current study, the host rocks for copper mineralization in this area are green sandstones, generally in ...
Kamal Noori Khankahdani, Mehrdad Karimi
doaj   +1 more source

Facile Synthesis of CuxS Electrocatalysts for CO2 Conversion into Formate and Study of Relations Between Cu and S with the Selectivity

Advanced Functional Materials, Volume 35, Issue 28, July 10, 2025.
Copper sulfide based electrocatalysts for CO2 conversion are selective for production of formate as major product. Transformations under electrochemical conditions result in significant sulfur loss, and this study examines the nature of how persistent, residual sulfur (observed as surface SO42– species and S dissolved in the electrolyte) can sustain ...
Sasho Stojkovikj, Gumaa A. El‐Nagar, Siddharth Gupta, Metodija Najdoski, Violeta Koleva, Theocharis Tzanoudakis, Frederik Firschke, Peter Bogdanoff, Matthew T. Mayer   +8 more
wiley   +1 more source

Revealing Transport, Dissolution, and Precipitation Behaviors in Electrokinetic‐Geochemical Reaction System at Pore‐to‐Core Scales

Water Resources Research, Volume 61, Issue 7, July 2025.
Abstract Net‐zero carbon targets drive the development of new underground activities such as hydrogen storage and in situ critical mineral recovery, all of which involve geochemical reactions between minerals and fluid/ion transport. Understanding these processes is key to optimizing efficiency and minimizing environmental impacts.
Kunning Tang, Hongli Su, Zhenkai Bo, Ying Da Wang, Peyman Mostaghimi, Ryan T. Armstrong   +5 more
wiley   +1 more source