Results 31 to 40 of about 457,006 (294)

Geology and mineralization of the Duobaoshan supergiant porphyry Cu-Au-Mo-Ag deposit (2.36 Mt) in Heilongjiang Province, China: A review

open access: yesChina Geology, 2023
The reserves of the Duobaoshan porphyry Cu-Au-Mo-Ag deposit (also referred to as the Duobaoshan porphyry Cu deposit) ranks first among the copper deposits in China and 33rd among the porphyry copper deposits in the world.
Sen Zhang   +12 more
doaj   +1 more source

Chitosan Beads as Eco-Friendly Biosorbent for the Biosorption of Au(III) and Cu(II) from Aqueous Solutions

open access: yesEnvironment-Behaviour Proceedings Journal, 2022
This work aimed to study the biosorption of metal ions by chitosan beads, conducted at room temperature by adding chitosan beads into a conical flask containing different initial pH. The flask was agitated, and the concentrations of metal ions were determined using inductively coupled plasma-optical emission spectrometry (ICP-OES).
Annestasia Ollat Jampang   +2 more
openaire   +1 more source

Synthesis and Characterization of Charge Transfer Salts Based on [M(dcdmp)2] (M = Au, Cu and Ni) with TTF Type Donors

open access: yesCrystals, 2018
The charge transfer salts α-DT-TTF[Au(dcdmp)2] (1), BET-TTF[Au(dcdmp)2] (2M and 2T), α-DT-TTF[Cu(dcdmp)2] (3), ET[Cu(dcdmp)2] (4), (BET-TTF)2[Cu(dcdmp)2] (5), (ET)2[Ni(dcdmp)2] (6), and α-mtdt[Cu(dcdmp)2] (7) were obtained by electrocrystallization of ...
Rafaela A. L. Silva   +6 more
doaj   +1 more source

Characterization and Structural Insights of the Reaction Products by Direct Leaching of the Noble Metals Au, Pd and Cu with N,N′-Dimethyl-piperazine-2,3-dithione/I2 Mixtures

open access: yesMolecules, 2021
In the context of new efficient and safe leaching agents for noble metals, this paper describes the capability of the Me2pipdt/I2 mixture (where Me2pipdt = N,N′-dimethyl-piperazine-2,3-dithione) in organic solutions to quantitatively dissolve Au, Pd, and
Angela Serpe   +4 more
doaj   +1 more source

Centrality, system size and energy dependences of charged-particle pseudo-rapidity distribution

open access: yes, 2009
Utilizing the three-fireball picture within the quark combination model, we study systematically the charged particle pseudorapidity distributions in both Au+Au and Cu+Cu collision systems as a function of collision centrality and energy, $\sqrt{s_{NN}}=$
DE-MING WEI   +6 more
core   +1 more source

Studies and Considerations on Forty-Three Gold and Silver Nose Ornaments from the Moche Tomb of the Lady of Cao

open access: yesHeritage, 2023
The authors studied forty-three beautiful nose ornaments from the Moche tomb of the Lady of Cao, located in the north of Peru, which has been dated to be around 300–400 d.C.
Giovanni E. Gigante   +6 more
doaj   +1 more source

Magnetic properties of epsilon iron(III) oxide nanorod arrays functionalized with gold and copper(II) oxide [PDF]

open access: yes, 2018
A sequential chemical vapor deposition (CVD) - radio frequency (RF)-sputtering approach was adopted to fabricate supported nanocomposites based on the scarcely investigated \u3b5-iron(III) oxide polymorph.
Barreca, Davide   +4 more
core   +1 more source

Severe discrepancies between experiment and theory in the superconducting proximity effect

open access: yes, 2006
The superconducting proximity effect is investigated for SN double layers in a regime where the resulting transition temperature T_{c} does not depend on the mean free paths of the films and, within limits, not on the transparency of the interface.
A. Volkov   +13 more
core   +1 more source

A New Model for Fermion Masses in Supersymmetric Grand Unified Theories [PDF]

open access: yes, 1993
We present a simple model for fermion mass matrices and quark mixing in the context of supersymmetric grand unified theories and show its agreement with experiment.
A. Bean   +33 more
core   +1 more source

Fluid Origin and Evolution of the Roc Blanc Silver Deposit (Jebilet Massif, Variscan Belt, Morocco): Constraints from Geology and Fluid Inclusions

open access: yesGeofluids, 2022
The Roc Blanc Pb-Zn-Ag-Au vein deposit is located in the NW of Marrakech, in the Central Jebilet massif. It is spatially related to Bramram-Tabouchennt-Bamega (BTB) granodioritic pluton (ca. 330 Ma) metamorphism aureole.
Amal El Arbaoui   +7 more
doaj   +1 more source

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