Results 41 to 50 of about 463,478 (223)

Comparative field‐scale assessment of TLUD and Kon‐Tiki biochar systems: agronomic performance and net CO2e‐based techno‐economics

open access: yesBiofuels, Bioproducts and Biorefining, EarlyView.
Abstract Post‐harvest agricultural residues in Latin America are commonly underutilized, leading to greenhouse gas emissions and lost opportunities for bio‐based value creation. This study tests the hypothesis that decentralized, farmer‐scale pyrolysis technologies can deliver comparable agronomic benefits while exhibiting distinct techno‐economic and ...
Juan F. Saldarriaga   +7 more
wiley   +1 more source

Simplificación del procesado de polvo de aluminio molido y estudio de las propiedades mecánicas de los compactos resultantes

open access: yesRevista de Metalurgia, 2001
Se ha desarrollado un nuevo método de consolidación pulvimetalúrgica de aluminio molido consistente en una desgasificación seguida de un doble ciclo de prensado y sinterización.
J. Cintas   +3 more
doaj   +1 more source

Applicability of near-field electrospinning for the development of TCP-based thin fibres and scaffold 3D printing

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2023
A novel method for obtaining ceramic (tricalcium phosphate, TCP) fibres with a small diameter (below 0.1 mm) is proposed and its potential use in the 3D printing of scaffolds for biomedical applications is explored.
M. García-Galán   +4 more
doaj   +1 more source

Manual de guías de laboratorio enfocadas al control de calidad de materiales y tecnología del concreto [PDF]

open access: yes, 2014
Trabajo de InvestigaciónEn la actualidad el laboratorio de Ingeniería Civil no cuenta con manuales de consulta que ilustren los ensayos que se ejecutan a los componentes del concreto hidráulico siguiendo los parámetros de las normar técnicas colombianas.
Gómez-Calderón, Julián Alonso   +1 more
core  

Synthesis and characterization of amphiphilic nitroxide 1,1,3,3–tetraethylisoindoline–2–oxyl–5–sodium sulfonate (TEIOSNa)

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract The synthesis and characterization of an amphiphilic nitroxide to be used as a controlling agent in a nitroxide‐mediated living radical polymerization in aqueous dispersion media is presented. In the first stage of nitroxide synthesis (phthalimide protection), two reaction methods were employed: traditional and microwave.
Enrique García‐Leal   +3 more
wiley   +1 more source

Actividades preventivas en un gasoducto [PDF]

open access: yes, 2012
En el presente Trabajo Fin de Máster se tratan temas preventivos en un gasoducto de alta presión, desde el momento previo a su puesta en servicio como todo el mantenimiento preventivo que dicho gasoducto genera.
Valles Pérez, Miriam
core   +1 more source

Design and implementation of a 3D‐printed modular distillation tower for experimental teaching in chemical engineering

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract Several authors have reported the disconnection between the skills, abilities, and attitudes of graduates from STEM careers with the current needs of the labour market. In science and engineering fields, research has found the need for interdisciplinary approaches that encourage meaningful learning.
Úrsula Manríquez‐Tolsá   +7 more
wiley   +1 more source

Morfología de la cementita en aceros arqueológicos que han sufrido incendio

open access: yesRevista de Metalurgia, 2013
Se presenta un estudio metalográfico de piezas arqueológicas de acero, encontradas en distintos yacimientos arqueológicos, cuyas microestructuras características revelan que se han visto afectadas por niveles de incendio.
A. J. Criado-Martín   +5 more
doaj   +1 more source

Actuation Strategies for a Wearable Cable-Driven Exosuit Based on Synergies in Younger and Older Adults

open access: yesSensors, 2022
Older adults (aged 55 years and above) have greater difficulty carrying out activities of daily living than younger adults (aged 25–55 years). Although age-related changes in human gait kinetics are well documented in qualitative terms in the scientific ...
Javier Bermejo-García   +4 more
doaj   +1 more source

Reflexión sobre la eficiencia del empleo de herramientas de enseñanza-aprendizaje en asignaturas básicas de los estudios de Grado [PDF]

open access: yes, 2013
El trabajo muestra los resultado académicos obtenidos a lo largo de los tres cursos, de la asignatura Química de Materiales de primer curso de la titulación de Grado de Ingeniería Civil de la ...
Dominguez Gomez, Rosa   +3 more
core  

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