Results 21 to 30 of about 412,689 (210)

Sistema electrónico para un prototipo de precipitador electrostático para la purificación de emisiones de gases contaminantes

, 2023
El siguiente artículo presenta el desarrollo de un prototipo del sistema electrónico de un precipitador electrostático para la purificación de emisiones de gases contaminantes. El objetivo principal de este proyecto es utilizar un sistema electrónico que
DUQUE SUAREZ, OSCAR MANUEL, FUENTES FUENTES, JORGE LEONARDO, CLAVIJO PEREZ, CARLOS MARIO, DUQUE SUAREZ, MARIA CAROLINA   +3 more
core   +1 more source

Arc pressure and weld metal fluid flow whilst using alternating shielding gases Part 1 : arc pressure measurement [PDF]

, 2013
As part of an ongoing process to fully evaluate the effects of an alternating shielding gas supply on gas shielded welding processes, a comparison between the arc pressures generated using argon, helium, alternating shielding gases and pulsed GTAW has ...
Campbell, Stuart, Galloway, Alexander, McPherson, Norman   +2 more
core   +4 more sources

Análisis de contaminantes emergentes orgánicos en agua residual [PDF]

, 2016
Los contaminantes emergentes son compuestos nuevos o que no se conocía que existían en calidad de contaminantes en el ambiente. Es un tema de creciente interés en el ámbito analítico debido a sus largas persistencias en la naturaleza además de su ...
Guerrón Cárdenas, Alberto
core   +1 more source

Determinación de contaminantes emergentes en aguas superficiales de la provincia de Esmeraldas

, 2021
Tesis previa obtención del título de Ingeniero/a en Gestión AmbientalLos Contaminantes emergentes (CEs) son sustancias que no están siendo reguladas o monitoreadas por entes gubernamentales.
Prado Alcívar, David Santiago
core   +1 more source

Physical and Chemical Properties of Biodiesel Obtained from Amazon Sailfin Catfish (Pterygoplichthys pardalis) Biomass Oil

Journal of Chemistry, Volume 2019, Issue 1, 2019., 2019
Amazon sailfin catfish (Pterygoplichthys pardalis) is considered one of the greatest threats to the biodiversity of continental aquatic systems, causing serious economic and environmental problems in the regions. In this work, the production of biodiesel from Amazon sailfin catfish biomass oil is studied. The physical and chemical properties of biofuel
F. Anguebes-Franseschi, A. Bassam, M. Abatal, O. May Tzuc, C. Aguilar-Ucán, A. T. Wakida-Kusunoki, S. E. Diaz-Mendez, L. C. San Pedro, Paula G. De Pinho   +8 more
wiley   +1 more source

Carbon Nanomaterials for Breast Cancer Treatment

Journal of Nanomaterials, Volume 2018, Issue 1, 2018., 2018
Currently, breast cancer is considered as a health problem worldwide. Furthermore, current treatments neither are capable of stopping its propagation and/or recurrence nor are specific for cancer cells. Therefore, side effects on healthy tissues and cells are common. An increase in the efficiency of treatments, along with a reduction in their toxicity,
M. L. Casais-Molina, C. Cab, G. Canto, J. Medina, A. Tapia, Federica Paladini   +5 more
wiley   +1 more source

Durability Indicators in High Absorption Recycled Aggregate Concrete

Advances in Materials Science and Engineering, Volume 2015, Issue 1, 2015., 2015
The use of recycled aggregates in structural concrete production has the inconvenience of increasing the fluid transport properties, such as porosity, sorptivity, and permeability, which reduces the resistance against penetration of environmental loads such as carbon dioxide and chloride ion.
Luis F. Jiménez, Eric I. Moreno, Robert Cerný   +2 more
wiley   +1 more source

Método de selección para la ubicación de puntos de monitoreo de gases de combustión provenientes de fuentes fijas puntuales en la ciudad de Loja, Ecuador

Revista Tecnológica, 2016
El presente trabajo se realiza dentro del marco del proyecto “Evaluación de la contaminación atmosférica por fuentes de combustión en la ciudad de Loja y su mitigación con energías renovables”  y tiene como objeto mostrar el criterio de selección de los ...
Orlando H. Álvarez Hérnandez, Thuesman Montaño, Jorge Maldonado, Miguel A Caraballo, Carlos Gustavo Samaniego Ojeda, José Cuenca Granda, Byron Solórzano Castillo   +6 more
doaj   +4 more sources

Effects of the Argon Pressure on the Optical Band Gap of Zinc Oxide Thin Films Grown by Nonreactive RF Sputtering

Advances in Condensed Matter Physics, Volume 2013, Issue 1, 2013., 2013
Zinc oxide (ZnO) thin films were grown by nonreactive RF sputtering at room temperature under varying argon pressures (PAr). Their optical band gap was found to increase from 3.58 to 4.34 eV when the argon pressure increases from 2.67 to 10.66 Pa. After annealing at 200°C and 500°C, optical band gaps decrease considerably.
M. Acosta, I. Riech, E. Martín-Tovar, Chong-Xin Shan   +3 more
wiley   +1 more source

Molecular free path distribution in rarefied gases [PDF]

, 2011
We present the results of investigations into the distribution of molecular free paths in rarefied gases using molecular dynamics simulations. Our tests on a range of different gas densities and confinements (unbounded, single bounding wall and parallel ...
Dongari, Nishanth, Zhang, Yonghao, Reese, Jason   +2 more
core   +2 more sources