Results 81 to 90 of about 19,486 (279)
Influence of Fe, Ni, and Cu Doping on the Photocatalytic Efficiency of ZnS: Implications for Prebiotic Chemistry [PDF]
arXiv, 2016 The mineral sphalerite (ZnS) is a typical constituent at the periphery of submarine hydrothermal deposits on Earth. It has been frequently suggested to have played an important role in the prebiotic chemistry due to its prominent photocatalytic activity. Nevertheless, the need for {\lambda} < 344 nm UV radiation, which accounts for a very minor part of
arxiv
The Geologic Features of the Occurrence of Copper in North America [PDF]
, 1933 Copper is of such widespread natural occurrence in North America and there are so few metal-mining districts that have not contributed to its production that it is obviously necessary in any brief general treatment of the geology of the copper deposits ...
Ransome, F. L.
core
Post-depositional tectonic modifications of VMS deposits in Iberia and its economic significance [PDF]
, 2011 The original stratigraphic relationships and structure of VMS deposits are commonly obscured by deformation. This can also affect their economic significance, as shown by several Iberian Pyrite Belt (IPB, SW Iberia) examples.
Castroviejo Bolibar, Ricardo +2 more
core +2 more sources
On the Chalcopyrite inclusions in Sphalerite
Boletim da Faculdade de Filosofia, Ciências e Letras da Universidade de São Paulo. Mineralogia, 1952 Uma das finalidades do presente trabalho foi medir as porcentagens de inclusões de calcopirita em cristais de esfalerita, que formam concrescimento de ocorrência relativamente frequente nas jazidas hidrotermais. Parece existir uma relação entre porcentagens de inclusões e intensidade hidrotermal dos depósitos, como também entre porcentagens de ...
openaire +3 more sources
Battery Energy, EarlyView.The study investigates the electronic and optical properties of Cu2ZnGexSn1−xS4 alloys, demonstrating that Ge alloying effectively tunes the band gap, enhancing solar cell efficiency. Through hybrid DFT and device simulations, the research reveals optimal Ge concentrations for photovoltaic applications, highlighting the potential of Ge‐based materials ...
Souraya Goumri‐Said +3 more
wiley +1 more source
Particle Shape-Based Evaluation of the Leaching of Sphalerite Ore in Dilute Acid Solutions
Journal of Advanced Research in Natural and Applied SciencesIn this study, the effects of changes in particle shapes on dissolution efficiencies in zinc (Zn) recovery from a lead-zinc (Pb-Zn) ore by acid leaching method were investigated.
Mert Terzi +2 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.The Fobinso granitoids are granodiorites, while the Esuajah granitoids are granites based on their mineralogical composition. The granitoids are generally enriched in LILE and LREE than HFSE, MREE, and HREE, indicating mixing with crustal sources during their evolution.
Emmanuel D. Sunkari +2 more
wiley +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.A novel structural configuration of hybrid anode material, comprising sulfurized polyacrylonitrile fiber matrix and in situ‐generated ZnS nanoparticles, has been designed to significantly enhance the rate kinetics and cycling performance in lithium/sodium storage systems.
Ying Liu +6 more
wiley +1 more source
Copper mineral occurrences in the Wrangell Mountains-Prince William Sound area, Alaska [PDF]
, 1971 On January 9, 1970, the U.S. Bureau of Mines entered into an agreement with the University of Alaska based upon a proposal submitted by the Mineral Industry Research Laboratory.
Grybeck, D.G., Heiner, L.E., Wolff, E.N.
core
A brief history and future directions of dielectrophoretic filtration: A review
ELECTROPHORESIS, EarlyView.Abstract Dielectrophoresis (DEP) is an electrokinetic effect first studied in the early 20th century. Since then, DEP has gained significant interest in research, owing to its ability to solve particle separation problems in various industries. Dielectrophoretic filtration (DEP filtration) is a separation method using DEP to filter a wide range of ...
Mary Clare O'Donnell +2 more
wiley +1 more source