Results 31 to 40 of about 9,082 (141)

Fluorescent Carbon Dots with Red Emission: A Selective Sensor for Fe(III) Ion Detection

open access: yesChemosensors
We present a procedure for the synthesis and purification of p-phenylenediamine-based carbon dots that can be used for the recognition of Fe(III) ions. Carbon dots have an approximately spherical shape with an average size of 10 nm and are composed of a ...
Ángela Fernández-Merino   +6 more
doaj   +1 more source

Mechanochemically Synthesized RuO2‐Doped LaMnO3 Perovskites as Bifunctional Cathodes for Rechargeable Zn/Air Batteries

open access: yesChemCatChem, Volume 16, Issue 21, November 11, 2024.
This article highlights the synthesis of new LaMnO3 perovskites in which RuO2 has been incorporated in order to increase its behavior as an electrocatalyst for the oxygen evolution reaction (OER). Air electrodes made with this catalyst have been tested in zinc‐air batteries, demonstrating a significant improvement in energy efficiency for a long life ...
Katherine Jejen   +4 more
wiley   +1 more source

La historia del primer principio de la termodinámica y sus implicaciones didácticas [PDF]

open access: yesRevista Eureka sobre Enseñanza y Divulgación de las Ciencias, 2007
En este trabajo se realiza una breve introducción histórica y epistemológica del nacimiento de la termodinámica como ciencia moderna.Se muestra,así mismo,como esta historia puede contribuir a mejorar la enseñanza de la termodinámica y a superar algunas ...
Furió-Gómez, C.   +2 more
doaj   +2 more sources

Factores termodinámicos y microestructurales para el diseño de aleaciones tixotrópicas

open access: yesRevista de Metalurgia, 2005
El proceso de conformado en estado semisólido es un proceso híbrido entre la fundición y la conformación por deformación, que se basa en las propiedades tixotrópicas que presentan algunos materiales que han sido agitados durante su proceso de ...
Z. Azpilgain   +4 more
doaj   +1 more source

Electrically Conductive Lignin Reinforced Polyacrylic Acid/Hyaluronic Acid Scaffolds With PEDOT:HA Nanoparticles

open access: yesPolymers for Advanced Technologies, Volume 35, Issue 10, October 2024.
ABSTRACT Hydrogel materials are continually developing in biomedical engineering and recently a lot of effort has gone into their engineered performance in physiological applications. Porosity is an important characteristic for tissue engineering scaffolds to allow enhanced biocompatibility and the pore size needed is dependent on the application and ...
Caitriona Winters   +4 more
wiley   +1 more source

Problemas de termodinámica aplicada

open access: yes, 2000
Obra de carácter didáctico dirigido a estudiantes de Ingeniería Industrial, complementaria de la obra Termodinámica Aplicada, también publicada por esta editorial. Permite completar su formación al abordar el estudio termodinámico de los problemas que la
López González, Luis María [0000-0002-0645-4068]   +3 more
core   +1 more source

Assessment of Hybrid Renewable Energy System: A Particle Swarm Optimization Approach to Power Demand Profile and Generation Management

open access: yesEnergies
The use of non-renewable energy resources is one of the main drivers of climate change. In response, the United Nations established the seventh Sustainable Development Goal, “Affordable and clean energy”, which promotes the transition toward renewable ...
Luis José Turcios   +4 more
doaj   +1 more source

Diseño de una planta piloto de extracción de pectina como gelificante a partir de residuos de la naranja (Citrus Sinensis)

open access: yesFIGEMPA, 2019
La necesidad de gestionar los residuos sólidos orgánicos generados por los vendedores de jugo de naranja, en la ciudad de Quito, se propone un proceso para convertir las cáscaras de naranja, en materia prima para la obtención de pectina cítrica dando a ...
Teresa Alejandra Palacios-Cabrera   +3 more
doaj   +1 more source

Dynamic Mechanical Properties of 3D Printable Graphene–Polymer Composite as Bipolar Plates in Fuel Cell Applications

open access: yesMacromolecular Symposia, Volume 413, Issue 4, August 2024.
Abstract A graphene–polymer composite is used in the manufacture by 3D printing of bipolar plates for fuel cells. This composite is formed by a PVDF matrix with graphene. The thermal and dynamic mechanical characterization of this composite is studied, as well as the density of printed composite.
Víctor Lorente‐López   +3 more
wiley   +1 more source

Problemas de termodinámica fundamental

open access: yes, 2000
Obra de carácter didáctico dirigido a estudiantes de Ingeniería Industrial, complementaria de la obra Termodinámica Fundamental, también publicada por esta ...
López González, Luis María [0000-0002-0645-4068]   +2 more
core   +1 more source

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