Results 11 to 20 of about 412,689 (210)

Fabricación de monolitos de carbón activado para captura de gases contaminantes [PDF]

, 2012
Resumen: El desarrollo de materiales adsorbentes para captura de gases contaminantes posee grandes ventajas en cuanto a capacidad de adsorción, gran selectividad, propiedades mecánicas y costos energéticos de operación.
Betancur Arroyave, Adrián Alberto
core   +3 more sources

Traseras en pintura contemporánea: análisis del impacto por acumulación de gases contaminantes [PDF]

Cuando se coloca una trasera en pintura sobre tela se crea una cámara de aire donde se acumulan gases contaminantes emitidos por la propia obra y el material de protección.
Pastor Valls, Mayte, Sánchez Ortiz, María Alicia, Morales Martín, Daniel   +2 more
core   +2 more sources

Construcción de un prototipo de supervisión y alerta de control químico de emisiones de gases contaminantes dentro de vehículos con sistema de combustión

Revista Científica y Tecnológica UPSE, 2022
A nivel mundial, las emisiones de gases de vehículos provocan grandes pérdidas humanas. El objetivo de la presente investigación fue la construcción de un prototipo de supervisión y alerta de nivel de gases contaminantes dentro de vehículos con sistema ...
Sandra Gabriela Barrazueta Rojas, José Guerra Salazar, Brayan Horna Berrezueta, Alex Chávez Escobar, José Morales Gordon   +4 more
doaj   +2 more sources

Emisiones de gases contaminantes en vehículos livianos a gasolina

Revista Científica INGENIAR: Ingeniería, Tecnología e Investigación, 2021
El estudio tuvo como objetivo central la determinación de emisiones de gases contaminantes en vehículos livianos a gasolina del parque automotor de la universidad técnica de Manabí, Portoviejo, Ecuador. Como metodología se aplicó en enfoque cuantitativo de la investigación, mediante un diseño cuasi experimental, empleando la técnica de la observación ...
Jorge Milton Velepucha-Sánchez, Luis Felipe Sabando-Piguabe   +1 more
openaire   +2 more sources

Report of the Scientific Committee of the Spanish Agency for Food Safety and Nutrition (AESAN) on the available evidence in relation to the potential obesogenic activity of certain chemical compounds that may be present in foods

Food Risk Assess Europe, Volume 1, Issue 2, September‐December 2023., 2023
Abstract According to the World Health Organization (WHO), obesity and overweight have reached epidemic proportions globally. In Spain, the prevalence of obesity is high, especially in childhood, with an upward trend in the last two decades. While improving dietary habits and increasing physical activity has been the main focus on reducing obesity, its
Ana María Rivas Velasco, Irene Bretón Lesmes, Araceli Díaz Perales, Ángel Gil Izquierdo, María José González Muñoz, Victoria Moreno Arribas, María del Puy Portillo Baquedano, Silvia Pichardo Sánchez   +7 more
wiley   +1 more source

Development of a Simple Integrative Carbon Nanomaterial Microextraction Method with GC‐MS for Assessing Pesticide Residues in Apples

Journal of Chemistry, Volume 2023, Issue 1, 2023., 2023
The present study describes an efficient analytical method for analyzing apple pesticide residues. This novel approach employs ultrasound‐assisted cleaning (UAC), solid‐phase microextraction (SPME), and gas chromatography/mass spectrometry (GC‐MS). A fiber coating with carbon nanomaterials (CNMs) was used for the extraction process.
Eduard F. Valenzuela, Leiliane C. André, Helvecio C. Menezes, Zenilda L. Cardeal, Eulogio J. Llorent Mart Nez   +4 more
wiley   +1 more source

Trends and knowledge gaps in field research investigating effects of anthropogenic noise

Conservation Biology, Volume 35, Issue 1, Page 115-129, February 2021., 2021
Abstract Anthropogenic noise is a globally widespread sensory pollutant, recognized as having potentially adverse effects on function, demography, and physiology in wild animals. Human population growth and associated changes in urbanization, transportation, and resource extraction all contribute to anthropogenic noise and are predicted to increase in ...
Paul Jerem, Fiona Mathews
wiley   +1 more source

Implementación de un sistema de monitoreo de gases contaminantes que afectan a la ciudad de Esmeraldas. [PDF]

, 2013
Cevallos Noboa, Oscar Roberto. Implementación de un sistema de monitoreo de gases contaminantes que afectan a la ciudad de Esmeraldas.(XVI 196 p. Tesis previa obtención título Ingeniero de Sistemas y Computación.
Cevallos Boboa, Oscar Alberto
core   +2 more sources

Taxing Flaring and the Politics of State Methane Release Policy

Review of Policy Research, Volume 37, Issue 1, Page 6-38, January 2020., 2020
Abstract Methane is a potent greenhouse gas but it has received strikingly less social science attention than carbon dioxide in examining climate policy options. This article explores American state policy toward methane that is not captured and instead released into the atmosphere during oil and gas production.
Barry Rabe, Claire Kaliban, Isabel Englehart   +2 more
wiley   +1 more source

Evaluation of gas metal arc welding with alterating shielding gases for use on AA6082T6 [PDF]

, 2012
Studies have been carried out to determine the effects of implementing alternating shielding gases for 6082T6 aluminium alloy welding. Alternating shielding gases is a newly developed method of supplying shielding gases to the weld area to enhance the ...
Gillies, Andrew, Campbell, Stuart, Galloway, Alexander, McPherson, Norman   +3 more
core   +4 more sources