Results 21 to 30 of about 611,454 (310)

Coral recruitment enhancement in fish shelter media composed of fly ash and nickel slag on Obi Island, South Halmahera

open access: yesDepik Jurnal
The reefcube, a modular structure, serves as a primary habitat for fish and aids in the recruitment of new coral. The reefcube is predominantly made from fly ash and nickel slag, by-products of pyrometallurgy process that contain high content of CaO, MgO,
Prasari Riski Hutami   +3 more
doaj   +1 more source

Indicadores económicos para evaluar la sostenibilidad de la empresa extractiva Materiales de Construcción a través del Método Multicriterio

open access: yesCiencia & Futuro, 2022
Se evaluó el desempeño de las variables e indicadores económicos en la empresa extractiva Materiales de la Construcción. La investigación se desarrolló a través de 7 etapas metodológicas que posibilitaron evaluar los principales indicadores de la ...
Dailén González-Martín   +2 more
doaj  

Effects of external dynamic disturbances and structural plane on rock fracturing around deep underground cavern

open access: yesInternational Journal of Coal Science & Technology, 2022
The occurrence of disasters in deep mining engineering has been confirmed to be closely related to the external dynamic disturbances and geological discontinuities. Thus, a combined finite-element method was employed to simulate the failure process of an
Fan Feng   +5 more
doaj   +1 more source

Anchoring zero valence single atoms of nickel and iron on graphdiyne for hydrogen evolution

open access: yesNature Communications, 2018
Electrocatalysis by atomic catalysts is a major focus of chemical and energy conversion effort. Although transition-metal-based bulk electrocatalysts for electrochemical application on energy conversion processes have been reported frequently, anchoring ...
Yurui Xue   +8 more
semanticscholar   +1 more source

Nickel-Catalyzed Dicarbofunctionalization of Alkenes.

open access: yesACS Catalysis, 2020
1,2-Dicarbofunctionalization of alkenes has emerged as an efficient synthetic strategy for preparing substituted molecules by coupling readily available alkenes with electrophiles and/or nucleophiles.
Xiaoxu Qi, Tianning Diao
semanticscholar   +1 more source

Thermal Conductivity Model Analysis of Unsaturated Ice-Containing Soil

open access: yesGeofluids, 2022
In cold locales, the thermal conductivity of soil porous media varies according to their composition and the phase state of the substance contained within the pore space.
Qiang Han, Zhiguo Wang, Rui Qin
doaj   +1 more source

Challenges and Strategies to Advance High‐Energy Nickel‐Rich Layered Lithium Transition Metal Oxide Cathodes for Harsh Operation

open access: yesAdvanced Functional Materials, 2020
Nickel‐rich layered lithium transition metal oxides (LiNi1−x−yCoxMnyO2 and LiNi1−x−yCoxAlyO2, x + y ≤ 0.2) are the most attractive cathode materials for the next generation lithium‐ion batteries for automotive application.
Gui‐Liang Xu   +5 more
semanticscholar   +1 more source

Removal and Recycling of Antimony in a Gold Concentrate

open access: yesKuangchan zonghe liyong
In this article, antimony was removed from the gold concentratebythe alkali leaching method, and then the recovery of antimony solution was also studied.
Jinquan GUO   +5 more
doaj   +1 more source

Dynamic and static analysis of a kind of novel J energy-releasing bolts

open access: yesGeomatics, Natural Hazards & Risk, 2020
Energy-absorbing rockbolt is now recognized as an important support element in deep mines around the world. A novel kind of energy-absorbing bolt called J-bolt was developed, which consists of anchoring (damping) module, deformation module, blending ...
Xingdong Zhao   +5 more
doaj   +1 more source

Alkyl Carbon-Carbon Bond Formation by Nickel/Photoredox Cross-Coupling.

open access: yesAngewandte Chemie, 2019
The union of photoredox and nickel catalysis has resulted in a renaissance in radical chemistry as well as in the use of nickel-catalyzed transformations, specifically for carbon-carbon bond formation.
John A. Milligan   +3 more
semanticscholar   +1 more source

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