Results 21 to 30 of about 7,951 (256)

Mineralogical and Geochemical Characterization of Asbestiform Todorokite, Birnessite, and Ranciéite, and Their host Mn-Rich Deposits from Serra D’Aiello (Southern Italy)

Fibers, 2020
Manganese ores, especially the oxyhydroxides in their different forms, are the dominant Mn-bearing minerals that occur in marine and terrestrial environments, where they are typically found as poorly crystalline and intermixed phases.
Andrea Bloise, Domenico Miriello, Rosanna De Rosa, Giovanni Vespasiano, Ilaria Fuoco, Raffaella De Luca, Eugenio Barrese, Carmine Apollaro   +7 more
doaj   +1 more source

The Age and Sedimentary Environment of the Kunyang Phosphate Deposit, Central Yunnan: Constraints from Re-Os Isotopes

Yankuang ceshi, 2018
BACKGROUND The Kunyang phosphate deposit in central Yunnan is the largest marine sedimentary phosphorite deposit in China. The deposit is hosted in black shale of the Lower Cambrian Meishucun Formation.
YAN Qing-gao, LI Chao, JIANG Xiao-jun, WANG Zhong-qiang, LI Yun-ju, LI Wei   +5 more
doaj   +1 more source

Forecast of a new Pb and Zn sulfide deposit at Matahambre-Mella mining district in Cuba

Minería y Geología, 2023
Because of the reinterpretation of VTEMPlus aero-electromagnetic flight, carried out in 2013 at Ls Alturas de Pizarras del Norte in Pinar del Río province, a new Pb and Zn sulfide deposit is predicted at Matahambre-Mella mining district, at a depth of ...
Orestes Francisco Carballo Otero, Orlando R. Carraz-Hernández, Ramón G. Pérez-Vázquez   +2 more
doaj  

A Multiple-Proxy Geochemical Investigation of a Shallow Core from Doggerland: Implications for Palaeolandscape and Paleoenvironmental Reconstruction

Humans
The exploration of Doggerland, the prehistoric landscape that once connected Britain to the continent, remains one of Europe’s most significant archeological challenges.
Mohammed Bensharada, Alex Finlay, Ben Stern, Richard Telford, Vincent Gaffney   +4 more
doaj   +1 more source

Relations between Climate and Terrestrial Deposits [PDF]

The Journal of Geology, 1908
n ...
openaire   +1 more source

Powder Optimization Strategies for Binder Jetting Printing of BaTiO3 and Ba0,6Sr0,4TiO3 Ceramics

Advanced Engineering Materials, EarlyView.
Powder optimization is investigated to enable binder jetting of BaTiO3 and Ba0.6Sr0.4TiO3 ferroelectric ceramics. The antagonistic relationship between flowability and binder compatibility is addressed through binder impregnation of granulated powders and fumed silica addition to fine powders.
Fanny Pruvost, Lionel Presmanes, Soléna Colin, Marie Vidal, Sophie Guillemet‐Fritsch   +4 more
wiley   +1 more source

Terrestrialization, miniaturization and rates of diversification in African puddle frogs (Anura: Phrynobatrachidae). [PDF]

PLoS ONE, 2012
Terrestrialization, the evolution of non-aquatic oviposition, and miniaturization, the evolution of tiny adult body size, are recurring trends in amphibian evolution, but the relationships among the traits that characterize these phenomena are not well ...
Breda M Zimkus, Lucinda Lawson, Simon P Loader, James Hanken   +3 more
doaj   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Fluxes of undissociated acids to terrestrial ecosystems by atmospheric deposition

Tellus B, 1989
Undissociated acids in the troposphere are transferred to terrestrial ecosystems as wet deposition in rain and cloud/fog water and as particulate and gaseous dry deposition during interstorm intervals. Wet deposition can be measured directly, and the sum of dry deposition and canopy release of undissociated acids can be estimated from net canopy wash ...
D. A. SCHAEFER, S. E. LINDBERG, W. A. HOFFMAN   +2 more
openaire   +1 more source

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

Advanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar, Akash Vyas, Mohammad Aatif Qazi, Nashit Jalal, Maria Ophelia Jarligo, Mostafa Yakout, Jing Liu, André McDonald   +7 more
wiley   +1 more source