Results 21 to 30 of about 398,560 (209)

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

Depik 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, Aldico Satria Ganesa, Jesaya Alfredo Alexandro Karyoto, Windy Prayogo   +3 more
doaj   +1 more source

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

Ciencia & 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, Julio Montero-Matos, Gioelkis Espinosa-Batista   +2 more
doaj  

Nickel-Catalyzed Reductive [2+2] Cycloaddition of Alkynes [PDF]

, 2018
The nickel-catalyzed synthesis of tetrasubstituted cyclobutenes from alkynes is reported. This transformation is uniquely promoted by the use of a primary aminophosphine, an unusual ligand in nickel catalysis.
Santiago Cañellas (3684409), John Montgomery (217551), Miquel À. Pericàs (1675765)   +2 more
core   +7 more sources

Analysis of Support Design in Weak Rock Drift Using a Systematic Approach

Advances in Civil Engineering, 2020
The aim of this study is to develop a systematic approach for support design of weak rock drift based on empirical, analytical, and numerical method, which is employed to estimate weak rock support demand and design support system.
Xingdong Zhao, Shujing Zhang, Huaibin Li, Guoju Chen, Pengqiang Zhang   +4 more
doaj   +1 more source

Ein Sermon || vber das Euangelion || Marcj am vij. Cap. zu || Wittemberg jm Schlossz ge=||predigt fur dem Curfuͤrst=||en vnd Hertzog Hein=||rich zu Sach=||sen #[et]c.|| D. Mart. Luther ||(Eine kurtze Predigt vber das || Euangelion Luce am vij. Cap.|| von der Witfrawen der || jr Son gestorben || war. 1534.||) [PDF]

Variante zu VD16 L 6247.Vorlageform des Erscheinungsvermerks: Wittemberg.|| 1534.||(Gedrugt ...
Luther, Martin
core   +1 more source

Removal and Recycling of Antimony in a Gold Concentrate

Kuangchan 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, Lairong HE, Hailong XI, Caixia CHEN, Tianfei MA, Quan LI   +5 more
doaj   +1 more source

Recovery of Rare Metals from Superalloy Scraps by an Ultrasonic Leaching Method with a Two-Stage Separation Process

Separations, 2022
Superalloy scraps are deemed as potential unconventional sources of rare metals. In this study, an ultrasonic leaching method with a two-stage separation process was proposed.
Long Wang, Sujun Lu, Jiayuan Fan, Yutian Ma, Juan Zhang, Shiyang Wang, Xiaoyao Pei, Yuan Sun, Guozhi Lv, Tingan Zhang   +9 more
doaj   +1 more source

Estimation of traces of nickel in sodium metal. [PDF]

, 1958
A simple and sensitive method is described for the determination of traces of nickel in sodium metal. The nickel is complexed with potassium cyanide and the absorption measured spectrophotometrically at 268 mµ.
Florence, TM, T.M. Florence
core   +1 more source

Nickel-Catalyzed Amination of Alkyl Electrophiles [PDF]

, 2023
Bimolecular nucleophilic substitution SN2 is the earliest and most important means of amination of alkyl electrophiles; its practical utilization is largely limited to primary or activated substrates.
Shengyang Ni, Yi Wang, Qing Wang (27728), Xiangzhang Tao (14191521), Shengyang Ni (1408804), Yi Pan (68170), Xiangzhang Tao, Yi Wang (32470), Yi Pan, Qing Wang   +9 more
core   +1 more source

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

Geomatics, 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, Shujing Zhang, Qiankun Zhu, Huaibin Li, Guoju Chen, Pengqiang Zhang   +5 more
doaj   +1 more source