Results 61 to 70 of about 1,996,012 (273)

A Phase Front Instability in Periodically Forced Oscillatory Systems

, 1998
Multiplicity of phase states within frequency locked bands in periodically forced oscillatory systems may give rise to front structures separating states with different phases. A new front instability is found within bands where $\omega_{forcing}/\omega_{
A. Hagberg, Aric Hagberg, B. A. Malomed, C. Elphick, C. Elphick, Christian Elphick, D. Rand, D. Walgraef, Ehud Meron, J. M. Gambaudo, J. Stavans, L. Korzinov, M. H. Jensen, M. J. Feigenbaum, P. Coullet, P. Coullet, P. Coullet, V. Petrov   +17 more
core   +1 more source

Photocatalytic Versus Stoichiometric Hydrogen Generation Using Mesoporous Silicon Catalysts: The Complex Role of Sacrificial Reagents

Advanced Functional Materials, EarlyView.
This study highlights the importance of accounting for stoichiometric hydrogen produced when utilizing Si photocatalysts. The stoichiometric contribution is sacrificial reagent dependent and decreases with increasing sterics around the catalyst surface.
Sarrah H. Putwa, Sarah A. Martell, Berthold Reis, Simona Schwarz, Mita Dasog   +4 more
wiley   +1 more source

Developing the Alumina Hybrid Sol-Gel Coating for Steel Oxidation Protection at High Temperatures [PDF]

Engineering and Technology Journal, 2014
The use of nano alumina thin film by hybrid sol-gel route to protect steel from high-temperature oxidation is limited due to the low thermal stability of this coat. In this work, study has been conducted to minimize this effect. The chemical compositions
Mohammed Hussein J. Al Atia
doaj   +1 more source

Mean Field Theory of the Morphology Transition in Stochastic Diffusion Limited Growth

, 1995
We propose a mean-field model for describing the averaged properties of a class of stochastic diffusion-limited growth systems. We then show that this model exhibits a morphology transition from a dense-branching structure with a convex envelope to a ...
D. Kessler, E. Ben-Jacob, E. Ben-Jacob, E. Ben-Jacob, E. Ben-Jacob, E. Brener, E. Brener, F. Liu, H. Levine, H. Levine, H. Levine, Herbert Levine, J. Langer, M. Cross, O. Shochet, O. Shochet, O. Shochet, O. Shochet, P. Meakin, P. Pelce, R. Kupferman, R. M. Ball, T. Ihle, T. Ihle, T. Vicsek, T. Witten, T. Witten, W. W. Mullins, Y. Saito, Y. Tu, Yuhai Tu   +30 more
core   +1 more source

Exploiting the Functionality of Cerium Oxide‐Modified Carbon Nanohorns Catalysts Toward Enhanced CO2 Reduction Performance

Advanced Functional Materials, EarlyView.
A cerium oxide‐carbon nanohybrid catalyst is synthesized via two distinct routes and is integrated into H‐type cells and gas diffusion layers (GDLs) to enhance electrochemical performance. Structural variations significantly affect performance, with the solvothermal sample exhibiting higher current densities.
Alessia Pollice, Michele Cacioppo, Miriam Marchi, Miriam Moro, Francesco Paolucci, Marcella Bonchio, Maurizio Prato, Giovanni Valenti, Michele Melchionna, Paolo Fornasiero   +9 more
wiley   +1 more source

Synthesis of TiO2 Nan particles by Using Sol-Gel Method and Its Applications as Antibacterial Agents [PDF]

Engineering and Technology Journal, 2014
TiO2 nanoparticles were prepared from TiCl4 as a precursor with ethanol solution with 1:10 ratio in ambient atmosphere, without additive. Sol-gel synthesized has been dried and calcined at (550-600)C.
Zainab N. Jameel, Adawiya J. Haider, Samar Y. Taha   +2 more
doaj   +1 more source

Vector solitons in (2+1) dimensions

, 1999
We address the problem of existence and stability of vector spatial solitons formed by two incoherently interacting optical beams in bulk Kerr and saturable media.
Andreas H. Carlsson, Bergé, Dan Anderson, Desaix, Elena A. Ostrovskaya, Hayata, Johan N. Malmberg, Kang, Manakov, McKinstrie, Mietek Lisak, Musslimani, Ostrovskaya, Segev, Segev, Tikhonenko, Yuri S. Kivshar   +16 more
core   +1 more source

Decoupling Size and Electronic Effects in Doped SrTiO3 Photocatalysts Through Surface Area–Normalized CO2 Hydrogenation Rates

Advanced Functional Materials, EarlyView.
Exploring the photocatalytic reverse water–gas shift (RWGS) reaction on doped SrTiO3 nanoparticle films, reveals that normalizing catalytic rates by the catalyst's specific surface area (SSA) disentangled surface area effects from the catalyst's intrinsic material properties.
Dikshita Bhattacharyya, Baliana Shani, Isaac Holmes‐Gentle, Gerardo T Martinez, Martyn McLachlan, Nicola Seriani, Ludmilla Steier   +6 more
wiley   +1 more source

El sol: ¿enemigo de nuestra piel? The sun: enemy of our skin?

Medisan, 2010
Actualmente existe una elevada mortalidad y morbilidad por cáncer de piel, lo cual representa un grave problema que va en aumento; por tal razón, en el presente estudio se revisó la bibliografía especializada sobre algunos aspectos de interés, tales como:
Moraima Mora Ochoa, Alvis Rosa Olivares Savigñon, Tania María González Gross, Inés Castro Mela   +3 more
doaj  

Un nouveau test d’évaluation de la biodégradabilité dans le sol -- Travaux de normalisation en cours

Oléagineux, Corps gras, Lipides, 2003
Biodégradabilité primaire (disparition d’un composé parent), biodégradabilité ultime (stade terminal de la transformation du composé), écotoxicité, bio-accumulation autant d’outils à notre disposition pour évaluer l’impact environnemental des composés ...
Cecutti Christine
doaj   +1 more source