Results 51 to 60 of about 160,665 (306)

Expert meeting on critical limits for heavy metals and methods for their application Proceedings [PDF]

, 2003
The Berlin meeting was structured according to its most important tasks (according to the recommendations of Sorrento 2002): - Review of the harmonised set of Critical Limits for heavy metals for soils and waters, whereby inclusion of limits for Hg and ...
Schuetze, G. (comp.), Umweltbundesamt, Berlin (Germany)   +1 more
core  

Precipitation–Flotation Process for Molybdenum and Uranium Separation from Wastewater

Metals
The mining of molybdenum and uranium ores inevitably results in the generation of large volumes of wastewater containing low concentrations of metals, which poses significant threats to the environment. This study presents a novel precipitation–flotation
Yanfang Huang, Sa Yue, Aohua Li, Hu Sun, Yizhuang Wang, Qunzhen Bu, Bingbing Liu, Guihong Han   +7 more
doaj   +1 more source

Comparative Studies of Digestion Techniques for the Dissolution of Neodymium-Based Magnets

Metals, 2021
The digestion of neodymium (NdFeB) magnets was investigated in the context of recycling rare earth elements (i.e., Nd, Pr, Dy, and Tb). Among more conventional digestion techniques (microwave digestion, open vessel digestion, and alkaline fusion ...
Mélodie Bonin, Frédéric-Georges Fontaine, Dominic Larivière   +2 more
doaj   +1 more source

Grinding and Concentration Technology of Critical Metals

Metals, 2022
The production and supply of raw materials in a global market are not without risks, and both the recent COVID-19 pandemic and the current one (Russia–Ukrania conflict) raised public awareness about the importance of multiple value chains [...]
openaire   +3 more sources

Observation of a critical charge mode in a strange metal

Science, 2023
Understanding the strange metallic behavior that develops at the brink of localization in quantum materials requires probing the underlying electronic charge dynamics. Using synchrotron radiation–based Mössbauer spectroscopy, we studied the charge fluctuations of the strange metal phase of β-YbAlB 4 as a function of
Hisao Kobayashi, Yui Sakaguchi, Hayato Kitagawa, Momoko Oura, Shugo Ikeda, Kentaro Kuga, Shintaro Suzuki, Satoru Nakatsuji, Ryo Masuda, Yasuhiro Kobayashi, Makoto Seto, Yoshitaka Yoda, Kenji Tamasaku, Yashar Komijani, Premala Chandra, Piers Coleman   +15 more
openaire   +3 more sources

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Sintering behavior and densification mechanisms of ultrafine molybdenum powders under varying compaction and sintering conditions

Journal of Materials Research and Technology
The sintering behavior of ultrafine molybdenum powders with a particle size of approximately 1 μm was systematically investigated. The impact of cold isostatic pressing (CIP) and sintering parameters on the densification of molybdenum was investigated. A
Qifei Zhang, Ziwen Zhu, Xiaolong Luo, Qingkui Li, Yongli Li, Xiaogang You, Zhongwei Zhao   +6 more
doaj   +1 more source

A Sustainable Process for the Recovery of Valuable Metals from Spent Lithium Ion Batteries by Deep Eutectic Solvents Leaching

Materials Proceedings, 2022
The feasibility of using low-environmental-impact leaching media to recover valuable metals from lithium ion batteries (LIBs) has been evaluated. Several deep eutectic solvents (DES) were tested as leaching agents in the presence of different type of ...
Lourdes Yurramendi, Jokin Hidalgo, Amal Siriwardana   +2 more
doaj   +1 more source

Metal-nonmetal transition and the second critical point in expanded metals [PDF]

EPL (Europhysics Letters), 2013
Based on the non-relativistic Coulomb model within which the matter is a system of interacting electrons and nuclei, using the quantum field theory and linear response theory methods, opportunity for the existence of the second critical point in expanded metals, which is directly related to the metal--nonmetal transition, predicted by Landau and ...
Bobrov, V.B., Trigger, S.A., Zagorodny, A.G.   +2 more
openaire   +2 more sources

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