Results 11 to 20 of about 130,677 (247)

The Crystal Structure of Bornite Cu₅FeS₄: Ordered Fe and Split Cu

Crystals, 2021
The crystal structure of bornite with ideal formula Cu5FeS4 from the Saishitang skarn copper deposit in Qinghai Province, along with bornite from the Yushui spouting hydrothermal copper deposit in Guangdong Province and the Bofang sandstone copper ...
Zhengxiang Shu, Can Shen, Anhuai Lu, Xiangping Gu, Zhongfa Liu   +4 more
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Fatores que governam a especiação do cobre em ambientes aquáticos urbanos: evidências da contribuição de sulfetos solúveis Factors governing copper speciation in urban freshwaters: evidences on the contribution of soluble sulfides

Química Nova, 2007
Copper speciation and behavior in different rivers located in the city of Curitiba were evaluated in this work. Sampling locations were selected to cover different levels of urbanization regarding their anthropogenic occupation and land use.
Elizabeth W. Scheffer, Fernando F. Sodré, Marco T. Grassi   +2 more
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Finding the Right Blend: Interplay Between Structure and Sodium Ion Conductivity in the System Na5AlS4–Na4SiS4

Frontiers in Chemistry, 2020
The rational design of high performance sodium solid electrolytes is one of the key challenges in modern battery research. In this work, we identify new sodium ion conductors in the substitution series Na5-xAl1-xSixS4 (0 ≤ x ≤ 1), which are entirely ...
Sascha Harm, Sascha Harm, Anna-Katharina Hatz, Anna-Katharina Hatz, Christian Schneider, Carla Hoefer, Constantin Hoch, Bettina V. Lotsch, Bettina V. Lotsch, Bettina V. Lotsch   +9 more
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Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)

REM: International Engineering Journal, 2021
The geophysical diagnosis of mineral deposits can be extremely useful in detailing mineralized zones and is a strategy for direct sampling by probing holes for content analysis.
César Augusto Moreira, Henrique Pelorca Carneiro, Matheus Felipe Stanfoca Casagrande, Marcos Eduardo Hartwig, Marco Antonio Fontoura Hansen   +4 more
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Catalyzed and uncatalyzed procedures for the syntheses of isomeric covalent multi-indolyl hetero non-metallides: an account

Beilstein Journal of Organic Chemistry, 2021
Two or more indole molecules tailored to a single non-metal central atom, through any of their C2–7 positions are not only structurally engaging but also constitute a class of important pharmacophores.
Ranadeep Talukdar
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Metatranscriptomic analysis of sulfur oxidation genes in the endosymbiont of Solemya velum

Frontiers in Microbiology, 2011
Thioautotrophic endosymbionts in the Domain Bacteria mediate key sulfur transformations in marine reducing environments. However, the molecular pathways underlying symbiont metabolism and the extent to which these pathways are expressed in situ are ...
Frank eStewart, Oleg eDmytrenko, Edward eDeLong, Colleen eCavanaugh   +3 more
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Estudo da adsorção de hidrogênio e sulfeto na superfície de paládio: aspectos experimentais (eletroquímica) e teóricos (ab initio e Teoria do Funcional da Densidade) Experimental (electrochemistry) and theoretical (ab initio and Density Functional Theory) studies of hydrogen and sulfide adsorption on palladium (100) surface

Química Nova, 2001
The adsorption of H and S2- species on Pd (100) has been studied with ab initio, density-functional calculations and electrochemical methods. A cluster of five Pd atoms with a frozen geometry described the surface.
Antônio Carlos D. Ângelo, Aguinaldo R. de Souza, Nelson H. Morgon, Júlio R. Sambrano   +3 more
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cis,trans,cis-1,2,3,4-Tetrakis[2-(ethylsulfanyl)phenyl]cyclobutane

IUCrData, 2016
The title cyclobutane derivative, C36H40S4, formed serendipitously through a photochemically initiated [2 + 2] cycloaddition. The asymmetric unit contains half a molecule with the 2-(ethylsulfanyl)phenyl substituents in a cis configuration, the other ...
Barbara Sohr, Florian Glöcklhofer, Berthold Stöger, Matthias Weil, Johannes Fröhlich   +4 more
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Lunar ore geology and feasibility of ore mineral detection using a far-IR spectrometer

Frontiers in Earth Science, 2023
Lunar sulfides and oxides are a significant source of noble and base metals and will be vital for future human colonies’ self-sustainability. Sulfide detection (pyrite and troilite) applies to many technological fields and use cases, for example, as a ...
Jakub Ciazela, Jaroslaw Bakala, Miroslaw Kowalinski, Bartosz Pieterek, Marek Steslicki, Marta Ciazela, Grzegorz Paslawski, Natalia Zalewska, Lukasz Sterczewski, Zaneta Szaforz, Mateusz Jozefowicz, Dariusz Marciniak, Maciej Fitt, Adam Sniadkowski, Miroslaw Rataj, Tomasz Mrozek   +15 more
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Optimization of factors affecting on sulfide oxidation from synthetic spent caustic by Haloalkaliphilic Thioalkalivibrio versutus by focus on sodium ion effect: Application of response surface methodology [PDF]

Iranian Journal of Chemical Engineering, 2017
In the present study, the effects of four factors including initial sulfide concentration (mg l-1 ), agitation speed (rpm), amount of inoculums (%) and sodium concentration (mg l-1) on removal efficiency (%R) and yield of sulfate production by ...
H. kalantari, M. Nosrati, S. A Shojaosadati, M. Shavandi   +3 more
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