Results 71 to 80 of about 437,144 (304)

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Toxic heavy metal ions contamination in water and their sustainable reduction by eco-friendly methods: isotherms, thermodynamics and kinetics study

Scientific Reports
Heavy metal ions can be introduced into the water through several point and non-point sources including leather industry, coal mining, agriculture activity and domestic waste.
Veer Singh, Ghufran Ahmed, Sonali Vedika, Pinki Kumar, Sanjay K. Chaturvedi, Sachchida Nand Rai, Emanuel Vamanu, Ashish Kumar   +7 more
doaj   +1 more source

Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Ludger Overmeyer, Annika Raatz   +5 more
wiley   +1 more source

Removal of Some Heavy Metal Cations from Aqueous Solution by Adsorption onto Natural Kaolin

Adsorption Science & Technology, 2005
The adsorption removal of some heavy metal cations such as Cu(II), Zn(II) and Co(II) from aqueous solution onto kaolin has been studied using the batch method with initial metal ion concentrations within the range 15–70 mg/l.
H. Ceylan, T. Şahan, R. Gürkan, Ş. Kubilay   +3 more
doaj   +1 more source

PENJERAPAN ION Pb DALAM ZEOLIT-Na [PDF]

, 2007
Sorption process is have been known for a long time and utilised for removal metal ion from solution. Natural zeolite can be used as adsorbent for heavy metal ion in waste water.
Fadilah,
core  

On the Ionisation Fraction in Protoplanetary Disks II: The Effect of Turbulent Mixing on Gas--phase Chemistry [PDF]

, 2005
We calculate the ionisation fraction in protostellar disk models using two different gas-phase chemical networks, and examine the effect of turbulent mixing by modelling the diffusion of chemical species vertically through the disk.
Balbus, Beckwith, Blaes, Carballido, Chiang, Fleming, Fromang, Gammie, Glassgold, Hawley, Hawley, Igea, Ilgner, Le Teuff, M. Ilgner, Matsumura, Muzerolle, Oppenheimer, Prosser, R. P. Nelson, Rawlings, Sano, Semenov, Wehrstedt, Wehrstedt, Willacy, Xie   +26 more
core   +4 more sources

Corrosion and Process Analysis of a Preoxidized MgO Recyclate‐Based Cermet Anode in Laboratory‐Scale Na‐Cryolite Molten Salt Electrolysis of Aluminum at 1000°C

Advanced Engineering Materials, EarlyView.
EDX elemental map of the pre‐oxidized MgO–steel cermet anode cross section after electrolysis. The development of inert anodes for aluminum electrolysis remains challenging due to the high corrosivity of cryolite‐based melts at 950°C–1000°C. This study investigates the corrosion and process behavior of a carbon‐free MgO–steel cermet anode derived from ...
Alexander Adamczyk, Farhan Hossain, Felipe A. Garcia Paz, Serhii Yaroshevskyi, Felix Drechsler, Daniel Vogt, Christos G. Aneziris, Alexandros Charitos   +7 more
wiley   +1 more source

Metoda Penghilangan Logam Berat (AS, Cd, Cr, Ag, Cu, Pb, Ni dan Zn) di dalam Air Limbah Industri [PDF]

, 2010
Industry is a potential source of water pollution, it produces pollutants that are extremely harmful to people and the environment. Many industrial facilities use freshwater to carry away waste from the plant and into rivers, lakes and oceans.
Said, N. I. (Nusa)
core  

A P-type ATPase importer that discriminates between essential and toxic transition metals [PDF]

, 2009
Transition metals, although being essential cofactors in many physiological processes, are toxic at elevated concentrations. Among the membrane-embedded transport proteins that maintain appropriate intracellular levels of transition metals are ATP-driven
A. T. Lee, Agranoff, Arguello, Arg  ello, Axelsen, Bal, Bull, D. C. Rees, Finney, Francis, Grass, Johnson, Krogh, Legatzki, Lewinson, Melchers, Nies, O. Lewinson, Papp-Wallace, Phung, Rensing, Schafer, Sharma, Thompson, Trenor, Vulpe   +25 more
core   +2 more sources

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source