Results 1 to 10 of about 288,849 (224)

Trace element composition and genesis mechanism of the Fuli Pb-Zn deposit in Yunnan: LA-ICP-MS and in situ S-Pb isotopic constraints

open access: yesFrontiers in Earth Science, 2023
The Fuli Pb-Zn deposit in Yunnan is located in the southeast of the Sichuan-Yunnan-Guizhou (SYG) Pb-Zn metallogenic province in South China. Lead and zinc reserves total approximately 0.3 million tons with an average grade of 18.68% Pb+Zn. The stratiform
Xingyu Liang   +5 more
doaj   +1 more source

Numerical Modeling of Rock Panels Subjected to Blast Loadings

open access: yesAdvances in Civil Engineering, 2022
In rock engineering problems, the rock is usually subjected to dynamic loads induced by drill, blast and rockburst. Therefore, understanding the dynamic response of rock benefit the safety and productivity of excavation activities.
Haijun Wang   +9 more
doaj   +1 more source

Selective leaching of Mo from an off-grade gravity lead concentrate in Na2CO3 solution [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2019
The selective leaching of Mo from an off-grade gravity lead concentrate was investigated in Na2CO3 solution using air as an oxidant. The leaching behaviors of Mo and Pb were predicted by the thermodynamic phase diagrams of Pb-Mo-C-H2O system.
Liu Z.-X.   +4 more
doaj   +1 more source

Stress background and rock fractures revealed by ultrasonic borehole television in the Fankou Lead-Zinc Mine

open access: yesFrontiers in Earth Science, 2023
The stress background and rock fractures are essential factors affecting the stability of mines. In order to better understand the in situ stress background and rock fractures in the Guangdong Fankou Mine, we use ultrasonic borehole television scanning ...
Yi Du   +7 more
doaj   +1 more source

Replacement of reserves zinc based on the recycling of technogenic raw materials [PDF]

open access: yesЭкономика региона, 2013
In the article, the perspective trends of the expansion of the mineral-ore base of the Russian producers of zinc by recycling of technogenic raw materials are considered.
Olga Sergeevna Bryantseva   +3 more
doaj   +1 more source

A review of the Discrete Element Method/Modelling (DEM) in agricultural engineering

open access: yesJournal of Agricultural Engineering, 2023
With the development of high-performance computing technology, the number of scientific publications regarding computational modelling of applications with the Discrete Element Method/Modelling (DEM) approaches in agricultural engineering has risen in ...
Qing Guo, Huihuang Xia
doaj   +1 more source

The Therapeutic Effect of Zinc Sulfate on Neonatal Hyperbilirubinemia [PDF]

open access: yesIranian Journal of Neonatology, 2017
Background: Approximately 60% of term neonates and 80% of preterm ones suffer from hyperbilirubinemia in theirfirst week of life. This study sought to characterize the therapeutic effect of oral zinc sulfate on neonatalhyperbilirubinemia.Methods: In this
Somayyeh Hashemian   +4 more
doaj   +1 more source

Modelling the Effect of Solution Composition and Temperature on the Conductivity of Zinc Electrowinning Electrolytes

open access: yesMetals, 2021
Zinc electrowinning is an energy-intensive step of hydrometallurgical zinc production in which ohmic drop contributes the second highest overpotential in the process.
Zulin Wang   +5 more
doaj   +1 more source

Zinc Electrode Shape-Change in Secondary Air Batteries: A 2D Modeling Approach [PDF]

open access: yesJournal of Power Sources 432 (2019) 119-132, 2019
Zinc-air batteries offer large specific energy densities, while relying on abundant and non-toxic materials. In this paper, we present the first multi-dimensional simulations of zinc-air batteries. We refine our existing theory-based model of secondary zinc-air systems.
arxiv   +1 more source

Reference Range of Serum Zinc Concentration in Patients with Heart Failure: A Systematic Review and Meta-analysis of Cross-Sectional Studies in the 21st Century [PDF]

open access: yesJournal of Health Sciences and Surveillance System, 2022
Background: Heart failure (HF) is a clinical disorder and Zinc is an important cofactor in regulating oxidative status.The present study aimed to determine the mean concentration of serum zinc in patients with HF. Methods: PubMed, Embase, Scopus, and Web
Mohammad Jalali   +3 more
doaj   +1 more source

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