Results 21 to 30 of about 482,662 (301)

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 Enantioselective Hydrothiocarbonylation of Cyclopropenes

, 2023
Hydrothiocarbonylation of olefins using carbon monoxide and thiols is a powerful method to synthesize thioesters from simple building blocks. Owing to the intrinsic challenges of catalyst poisoning, transition-metal-catalyzed asymmetric thiocarbonylation,
Bill Morandi (1368567), Xichang Dong (1789246), Juntao Ye (1964032), Song-Zhou Cai (16501396), Rongrong Yu (3876775), Can Li (31070), Xianjie Fang (1602598), Hongyu Zhong (2933082)   +7 more
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

Nickel metallochaperones: Structure, function, and Nickel-binding properties

, 2017
Nickel-containing enzymes catalyze a series of important biochemical processes in both prokaryotes and eukaryotes. The maturation of the enzymes requires the proper assembly of the nickel-containing active sites, which involves a battery of nickel ...
Wei Xia, Li, H, Hongzhe Sun, Xia, W, Sun, H, Hongyan Li   +5 more
core   +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

XAFS spectrum of Nickel

This dataset consists of X-ray absorption fine structure (XAFS) spectra at Ni K-edge of Nickel measured at PF, and is a part of XAFS database (MDR XAFS DB, https://doi.org/10.48505/nims.1447) as a collection of ...
Toshihiko Yokoyama
core   +3 more sources

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

Thermal Conductivity Model Analysis of Unsaturated Ice-Containing Soil

Geofluids, 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

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

Nickel-Catalyzed Isomerization of Homoallylic Alcohols

, 2023
Nickel-catalyzed isomerizations of homoallylic alcohols and a bishomoallylic alcohol are presented. These isomerization reactions occur in the presence of a simple nickel catalyst that does not require addition of an exogenous ligand.
Dustin D. Youmans (15425452), Levi M. Stanley, Dustin D. Youmans, Hai N. Tran, Hai N. Tran (2142808), Levi M. Stanley (1329015)   +5 more
core   +1 more source