Results 51 to 60 of about 1,005,707 (276)

Trade-Off between Degradation Efficiency and Recyclability: Zeolite-Enhanced Ni_3−xCo_xS₄ Catalyst for Photocatalytic Degradation of Methylene Blue

Molecules
We herein report successful syntheses of both nickel cobalt sulfide (NCS) and its composite with zeolite (NCS@Z) using a solvothermal method. Techniques such as EDX analysis, SEM, and molar ratio determination were used for product characterization.
Rachel Anne E. Lagunay, Ritche Roi B. Adalim, Aruzhan Tleubekova, Diana Suleimenova, Marvin Jose F. Fernandez, Robert J. O’Reilly, Mannix P. Balanay   +6 more
doaj   +1 more source

Well-posed initial-boundary value problem for the harmonic Einstein equations using energy estimates [PDF]

, 2007
In recent work, we used pseudo-differential theory to establish conditions that the initial-boundary value problem for second order systems of wave equations be strongly well-posed in a generalized sense. The applications included the harmonic version of
Kreiss, H. -O., Reula, O., Sarbach, O., Winicour, J.   +3 more
core   +2 more sources

Combined Process‐ and Phase‐Field‐Simulation to Predict the Microstructure of Single‐Crystal Ni‐Based Superalloys

Advanced Engineering Materials, EarlyView.
A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm, André B. Baldissera, Rainer Völkl, Uwe Glatzel   +3 more
wiley   +1 more source

Kinetic, Isotherm and Thermodynamic Aspects of Zn²⁺ Biosorption by Spirulina platensis: Optimization of Process Variables by Response Surface Methodology

Life, 2022
The aim of this study was to assess the efficiency of Spirulina platensis for removing Zn2+ ions from the aqueous solutions. The optimized conditions of 4.48 g/L algal dose, pH of 6.62 and initial zinc concentration of 29.72 mg/L obtained by response ...
Nada K. Alharbi, Mayasar I. Al-Zaban, Fawziah M. Albarakaty, Sayed F. Abdelwahab, Sedky H. A. Hassan, Mustafa A. Fawzy   +5 more
doaj   +1 more source

Optimization of biosorption process using cucumis melo rind for the removal of Fe, Mn and Pb ions from groundwater [PDF]

, 2002
Biosorption can be an effective technique for the treatment of metal-bearing groundwater. Several fruits and agricultural by-products demonstrated the ability to remove the heavy metals and thereby reduce the water contaminants. In the present study, the
Mohd Asharuddin, Syazwani
core   +1 more source

Microstructure Design of Steel‐Spinel Composites via Spark Plasma Sintering Process

Advanced Engineering Materials, EarlyView.
This study illustrates how spark plasma sintering at reduced oxygen partial pressure enables controlled formation of steel‐spinel composites through tailored redox reactions and cation exchange. Comparison of the MgO–Fe2O3, steel–(MgO+Cr2O3), and steel–(MgO+Fe2O3) systems shows how oxygen activity and interface chemistry govern spinel formation, phase ...
Mahnaz Mehdizadehlima, Christian Schimpf, Stefan Martin, Olga Fabrichnaya, David Rafaja   +4 more
wiley   +1 more source

A Topology Optimization Framework for the Inverse Design of Nonlinear Mechanical Metamaterials

Advanced Engineering Materials, EarlyView.
This work uses topology optimization to design unit cells for mechanical metamaterials with a prescribed nonlinear stress–strain response. The framework adds contact and postbuckling modeling to synthesize microstructures for three highly nonlinear responses, including pseudoductile behavior, monostable with snap‐through buckling, and bistable ...
Charlie Aveline, Matthew Santer, Robert Hewson   +2 more
wiley   +1 more source

Ultrafast Magnetization Dynamics in Diluted Magnetic Semiconductors [PDF]

, 2009
We present a dynamical model that successfully explains the observed time evolution of the magnetization in diluted magnetic semiconductor quantum wells after weak laser excitation.
Abrikosov A A, G Manfredi, Haug H, O Morandi, P-A Hervieux, Shah J, Winkler R   +6 more
core   +4 more sources

Application of a Mixed Order Model to Determine the Rate Adsorption of 1-Nitronaphthalene onto Activated Carbon

Applied Environmental Research, 2019
This study investigated the adsorption kinetics of 1-nitronaphthalene solution (a polycyclic aromatic hydrocarbon, PAH) onto seven different masses of activated carbon.
Suntree Rincome
doaj   +7 more sources

Bosonic spin-1 SOPHY

Physics Letters B
In this work we study the canonical quantization of a second-order pseudo-Hermitian field theory for massive spin-1 bosons transforming under the (1, 0)⊕(0, 1) representation of the restricted Lorentz Group and satisfying the Klein-Gordon equation.
Armando De la C. Rangel-Pantoja, I. Díaz-Saldaña, Carlos A. Vaquera-Araujo   +2 more
doaj   +1 more source