Results 21 to 30 of about 1,490 (136)

A Simple Method to Determine Bioethanol Production from Coffee Mucilage, Verified by HPLC

BioResources, 2015
This paper proposes a method to determine bioethanol concentration that uses a pycnometer verified with a high performance liquid chromatography (HPLC) technique; it is a simple tool to determine the density of liquids for getting information about the ...
Bianca Yadira Pérez-Sariñana, Sergio Saldaña-Trinidad, Carlos Alberto Guerrero-Fajardo, Luis Fernando Santis-Espinosa, Sebastian Pathiyamattom-Joseph   +4 more
doaj   +1 more source

Surface Modification of Aluminum Alloy 6061 for Bipolar Plate Application: Adhesion Characteristics and Corrosion Resistance

International Journal of Electrochemical Science, 2018
Surface modification studies on aluminum alloy 6061 (AA6061) to improve the surface properties of metallic bipolar plates in fuel cells are presented in this work.
A. G. González Gutiérrez, P.J. Sebastian, L. Magallón Cacho, E. Borja Arco, J. Campos, Agustin Baron   +5 more
doaj   +1 more source

Homogeneity and spatial variability of meteorological series in “Yachay - City of Knowledge” project area

ACI Avances en Ciencias e Ingenierías, 2013
Using Einstein’s field equations, the energy-momentum tensor components are deduced for a Morris-Thorne wormhole in a cosmological background. The embedding surfaces for these wormholes are studied and also the red shift parameter is calculated in terms ...
Gabriel Gaona, Emmanuelle Quentin, Jerko Labus   +2 more
doaj   +1 more source

Computational fluid dynamics analysis of heat transfer in a greenhouse solar dryer “chapel‐type” coupled to an air solar heating system

Energy Science & Engineering, 2019
The distribution of turbulent kinetic energy (TKE), temperature, and velocity of humid air inside the greenhouse solar dryer (GHSD) was numerically investigated using 3D CFD ANSYS FLUENT code.
Nicolás‐Iván Román‐Roldán, Anabel López‐Ortiz, Jean‐Fulbert Ituna‐Yudonago, Octavio García‐Valladares, Isaac Pilatowsky‐Figueroa   +4 more
doaj   +1 more source

Gobernanza global y evolución de las energías renovables en el sur. Objetivos políticos y estructuras de gobernanza

Letras Verdes: Revista Latinoamericana de Estudios Socioambientales, 2013
El desarrollo de la gobernanza global de las energías renovables comparte similitudes y diferencias con otros sectores de la gobernanza global. La proliferación de organizaciones en el sector resalta el importante compromiso de varios actores con el ...
Wolfgang Hein, Daniela García Sánchez, Lars Holstenkamp   +2 more
doaj   +1 more source

Sociología de energías renovables y transformación energética en México

Estudios Sociológicos, 2022
A partir de la revisión de la noción de transición energética en la historia y de la sociología de las energías renovables, este artículo busca comprender las relaciones de fuerza que se están generando en el desarrollo de proyectos de energías ...
Ezequiel Zárate Toledo
doaj   +1 more source

Combustion Properties of Timber in Historic Structures: Case Study of the São Pedro de Alcântara Chapel Fire

Fire and Materials, EarlyView.
ABSTRACT Timber plays a fundamental role in the fire performance of historic building components, where ageing and environmental exposure can markedly influence its physical and chemical properties. This study presents an experimental investigation of the fire behaviour of Ocotea sp.
João Vitor Lopes Ferreira, Ana Lucia de Souza Ventapane, Bruno Polycarpo Palmerim Dias, Simone Pereira da Silva Ribeiro, Alexandre Landesmann   +4 more
wiley   +1 more source

Optical and thermal properties of edible coatings for application in solar drying

Scientific Reports, 2021
Solar drying is a sustainable process that may impact the quality of dried food. This is because, pigments contained in food are sensitive to sunlight, and exposure to ultraviolet radiation can affect them.
A. López-Ortiz, I. Y. Pacheco Pineda, L. L. Méndez-Lagunas, A. Balbuena Ortega, Laura Guerrero Martínez, J. P. Pérez-Orozco, J. A. del Río, P. K. Nair   +7 more
doaj   +1 more source

A Social and Solidarity Economy Network's Evolution on Sustainability Discourses: Weak Versus Strong Sustainability

Sustainable Development, EarlyView.
ABSTRACT This study explores innovations concerning sustainability discourses in the case of a Social and Solidarity Economy (SSE) network. We analyse the incorporation of discursive elements characteristic of strong sustainability versus weak sustainability approaches in the different Solidarity Economy Principles Charters over time (2000, 2011, 2022),
Jon Ruiz‐de‐Galarreta, Unai Villalba‐Eguiluz, Pablo Arrillaga   +2 more
wiley   +1 more source

Portable, Benchtop and Micro‐XRF in Agriculture—Present and Future From the Hardware Perspective

X-Ray Spectrometry, EarlyView.
ABSTRACT X‐ray fluorescence (XRF) spectrometry has been an important tool in agricultural studies recently. This technique allows the multielemental, direct, and in situ analysis. The objective of this review is to evaluate the use of XRF in agriculture focusing on plant and soil samples based on indexed articles in the Scopus database from 2020 to ...
Eduardo de Almeida, Felipe Rodrigues Santos, Fabio Luiz Melquiades, Gabriel Sgarbiero Montanha, Tiago Rodrigues Tavares, Eduardo Santos, Higor José Freitas Alves da Silva, Hudson Wallace Pereira de Carvalho   +7 more
wiley   +1 more source