Results 21 to 30 of about 1,917,278 (304)

Durability of alkali-activated materials with different C–S–H and N-A-S-H gels in acid and alkaline environment

Journal of Materials Research and Technology, 2022
This work explores the durability of alkali-activated materials exposed to acidic and alkaline environments to analyze and evaluate their applications. The alkali-activated materials of metakaolin and metakaolin-mine tailings were immersed in solutions ...
Min Yang, Yanjin Zheng, Xing Li, Xiaojun Yang, Feng Rao, Lele Zhong   +5 more
doaj   +1 more source

Construction of a Two-Dimensional GO/Ti₃C₂T_X Composite Membrane and Investigation of Mg²⁺/Li⁺ Separation Performance

Nanomaterials, 2023
Graphene oxide (GO) two-dimensional (2D) membranes with unique layer structures and tunable layer spacing have special advantages and great potential in the field of water treatment.
Zhenhua Feng, Chengwen Liu, Binbin Tang, Xiaojun Yang, Wenjie Jiang, Peng Wang, Xianjun Tang, Hongshan Wang, Xiangdong Zeng, Guangyong Zeng   +9 more
doaj   +1 more source

Approach to recover strategic metals from brines [PDF]

, 1981
The objective of the proposed research is to evaluate hypersaline brines from geothermal sources and salt domes as possible sources for some strategic metals. This research is suggested because several previous analyses of brine from geothermal wells in the Imperial Valley, California, and from Gulf Coast salt domes, indicate near commercial values for
Raber, E., Harrar, J., Gregg, D.
openaire   +2 more sources

Effects of Contamination on the Recyclability of NdFeB Permanent Magnets via Short-Loop Processing: Review of Common Contaminants and Study on Ni Coating Residues

Recycling
Short-loop recycling of NdFeB trades a reduced ecological burden for a higher sensitivity towards contamination, as the powder is usually further processed as-is.
Laura Grau, Fabian Burkhardt, Nicolas Moll, Stefan Rathfelder, Spomenka Kobe, Carlo Burkhardt   +5 more
doaj   +1 more source

Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines

Energies, 2019
Thermal loading can induce mechanical stresses in the windings of electrical machines, especially those impregnated with epoxy resins, which is mostly the case in modern traction motors.
Bishal Silwal, Abdalla Hussein Mohamed, Jasper Nonneman, Michel De Paepe, Peter Sergeant   +4 more
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Seed-free selective deposition of lithium into fluorine/oxygen co-doped interconnected stacked hollow carbon spheres for stable lithium metal anode

Nano Research
Porous carbon derived from biomass is a potential host for practical lithium (Li) metal anode. However, natural lithiophobicity and heterogeneity of these materials cause uncontrollable Li dendrites and unsatisfied electrochemical performance ...
Xingwu Weng, Ruixiang Wang, Huai Jiang, Bo Hong, Zexun Han, Qinglong Yan, Helin Fan, Xiaocong Zhong, Zhifeng Xu   +8 more
doaj   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

Anodic dissolution of metals in oxide-free cryolite melts [PDF]

, 2005
The anodic behavior of metals in molten cryolite-alumina melts has been investigated mostly for use as inert anodes for the Hall-Héroult process. In the present work, gold, platinum, palladium, copper, tungsten, nickel, cobalt and iron metal electrodes ...
Arurault, Laurent, Cassayre, Laurent, Taxil, Pierre, Chamelot, Pierre   +3 more
core   +1 more source

Electrochemical Approaches for the Recovery of Metals from Electronic Waste: A Critical Review

Recycling, 2021
Electronic waste (e-waste) management and recycling are gaining significant attention due to the presence of precious, critical, or strategic metals combined with the associated environmental burden of recovering metals from natural mines. Metal recovery
Varun Rai, Daobin Liu, Dong Xia, Yamuna Jayaraman, Jean-Christophe P. Gabriel   +4 more
doaj   +1 more source