Results 71 to 80 of about 235,655 (238)

Carbon‐Doped Amorphous Gallium Oxide Forms a Heterojunction With Water to Improve the Electrocatalytic Oxygen Evolution Reaction

open access: yesCarbon Energy, EarlyView.
A dynamic catalyst–H2O heterojunction (CWH) forms on ACG during OER, with periodic bubble evolution modulating band bending and interfacial charge transfer. Electron–radical coupling drives the generation of •OH/•O2− species, converting Ga2O3 into GaOOH, whereas surface CO32− from C doping stabilizes the interface, suppressing catalyst dissolution and ...
Ruijie Dai   +6 more
wiley   +1 more source

Trichodina nigra Lom 1960

open access: yes, 2007
Trichodina nigra Lom, 1960 (Figs. 1D, 3D) Host: Carassius auratus. Location: Gills. Prevalence: Out of 16 fishes examined, one was infected (6.3 %). Locality: Chongqing, China (29º5' N, 106º5' E). Date of sampling: February, 2004. Description. Large-size, body diameter 65.0–73.0µm (69.6 ± 4.2); diameter of adhesive disc 49.0– 65.0µm (56.3 ± 3.4 ...
Tang, Fahui, Zhao, Yuanjun, Tao, Yanfei
openaire   +1 more source

Iron and Nickel Substituted Perovskite Cobaltites for Sustainable Oxygen Evolving Anodes in Alkaline Environment

open access: yesChemSusChem, Volume 18, Issue 6, March 15, 2025.
Perovskite oxide catalysts with reduced Co content, substituted by Fe and Ni, are synthesized and studied for their activity in the oxygen evolution reaction in alkaline media. An increase in the intrinsic catalytic activity (obtained by the (RctCdl)−1 product) of the base material (Ba0.5Gd0.8La0.7Co2O6‐δ) is seen for an as high as 70 % substitution of
Henrik Petlund   +6 more
wiley   +1 more source

PERSONALIZACIÓN DEL PROCESO DE APRENDIZAJE USANDO LEARNING OBJECTS REUTILIZABLES

open access: yesRED. Revista de Educación a Distancia, 2005
En este artículo se describe el diseño de una plataforma de e-learning que integra el uso de learning objects (objetos de aprendizaje) reutilizables como elementos básicos para la construcción de itinerarios que permiten la personalización del proceso de
Julià Minguillón   +3 more
doaj  

The Ligament of Marshall: Far From Vestigial!

open access: yesAnnals of Thoracic Surgery Short Reports
Background: The ligament of Marshall (LOM) is a vestigial fold of the left atrium that contains the remnant left cardinal vein, muscle bundles, and nerve fibers.
Raghav Chandra, MD   +3 more
doaj   +1 more source

A web services architecture for learning object discovery and assembly [PDF]

open access: yes, 2004
Courseware systems are often based on an assembly of different components, addressing the different needs of storage and delivery functionality. The Learning Technology Standard Architecture LTSA provides a generic architectural framework for these ...
Barrett, Ronan, Pahl, Claus
core   +2 more sources

Achievement of Transition Metal Chalcogenides/Oxides in Hydrogen Production by Seawater Electrolysis

open access: yesEcoEnergy, EarlyView.
Transition metal chalcogenides (TMCs)/oxides have shown great application potential in seawater splitting for hydrogen generation due to their adjustable electronic properties, abundant active sites, and excellent catalytic performance. ABSTRACT Under the impetus of global “dual carbon” goals, green hydrogen has become a key component of the future ...
Xiaohui Du, Xinyu Li, Jianna Li, Tao Sun
wiley   +1 more source

Biostratigrafie spodní křídy manínské jednotky (lom Butkov, Strážovské vrchy, Západní Karpaty) [PDF]

open access: yes, 2003
This paper is a continuation of systematic stratigraphical research of Lower Cretaceous sequence of the Manín Unit excavated in the Butkov quarry. Calcareous deposits are significant especially by richness of ammonites.
Halásová, Eva   +3 more
core   +1 more source

Activating and Stabilizing Lattice Oxygen in Spinel NiCo2O4 through F, Mn Dual Doping for Rechargeable Zinc–Air Batteries

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This study exploited the substitution doping of Mn and F in NiCo2O4 to activate and stabilize lattice oxygen, achieving a stable synergistic effect between AEM and LOM to enhance the intrinsic activity of the catalyst. The outstanding bifunctional properties enable its application as an anode catalyst in zinc–air batteries.
Jitong Li   +8 more
wiley   +1 more source

Judging by the Rules? The emergence of evaluation practices

open access: yesValuation Studies
How does evaluation work differently, and how do evaluation practices emerge, in different contexts? Drawing on a mixed-methods study of evaluation in figure skating and classical music, I discuss the divergent evaluative cultures in these settings ...
Stacy Lom
doaj   +1 more source

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