Resultados de búsqueda - (((((((sumy OR some) OR uusums) OR usumaa) OR (smo OR smo)) OR sumaaay) OR sum) OR uasumooo)

Experimental data on the production and characterization of biochars derived from coconut-shell wastes obtained from the Colombian Pacific Coast at low temperature pyrolysis por Castilla Caballero, Deyler, Barraza Burgos, Juan, Gunasekaran, Sundaram, Roa Espinosa, Aicardo, Colina Márquez, José, Machuca Martínez, Fiderman, Hernández Ramírez, Aracely, Vázquez Rodríguez, Sofía

“…Production yields and some biochar properties such as particle size, Zeta Potential, elemental content (C, N, Al, B, Ca, Cu, Fe, K, Li, Mg, Mn, Na, P, S, Ti, Zn), BET surface area, FT-IR spectrum, XRD spectrum, and SEM morphology are presented. …”
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Depósito de películas ultradelgadas de óxido de zinc (ZnO) por ALD por Martínez G., Eduardo, Flores, José, Pérez Tijerina, Eduardo

“…Trough the topographical analysis developed by AFM, we have observed that roughness of the surface has a clear dependence with some of the experimental parameters as the exposure time with the precursors and the purge time in which the residues are removed. …”
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Nonferrous waste foundry sand and milling fly ash as alternative low mechanical strength materials for construction industry: effect on mortars at early ages por Vázquez Rodríguez, Francisco Javier, Valadez Ramos, Jaime Elihezer, Puente Ornelas, Rodrigo, Contreras, J. E., Arato, A., Rodríguez Castellanos, Edén Amaral

“…Microstructurally, it was found a porous cement matrix with some cracking caused by the reaction of portland cement with the metallic aluminum remaining in the waste sand, which is correlated to the low mechanical resistance obtained. …”
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Effect of Sawdust Particle Size on Physical, Mechanical, and Energetic Properties of Pinus durangensis Briquettes por Zepeda Cepeda, Christian Osvaldo, Goche Télles, José Rodolfo, Palacios Mendoza, Celina, Moreno Anguiano, Oswaldo, Núñez Retana, Víctor Daniel, Heya, Maginot Ngangyo, Carrillo Parra, Artemio

“…The objective of this research was to evaluate the effect of different particle sizes of sawdust in mixtures on some physical, mechanical, and energetic properties of briquettes made from Pinus durangensis sawdust, as well as set the ranges within the appropriate values found to obtain desired values. …”
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Corrosion Resistance of Hard Coat Anodized AA 6061 in Citric–Sulfuric Solutions por Cabral Miramontes, José Ángel, Gaona Tiburcio, Citlalli, Estupiñan López, Francisco H., Lara Banda, María del Refugio, Zambrano Robledo, Patricia del Carmen, Nieves Mendoza, Demetrio, Maldonado Bandala, Erick, Almeraya Calderón, Facundo, Chacón Nava, José G.

“…Unfortunately, aluminum alloys are susceptible to corrosion, which limits their use in some corrosive environments. The aim of this work is to characterize hard coat film fabricated by anodizing in a citric–sulfuric acid system using electrochemical techniques. …”
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Electrochemical corrosion behavior of passivated precipitation hardening stainless steels for aerospace applications por Villegas Tovar, José M., Gaona Tiburcio, Citlalli, Lara Banda, María del Refugio, Maldonado Bandala, Erick, Baltazar Zamora, Miguel Ángel, Cabral Miramontes, José Ángel, Nieves Mendoza, Demetrio, Olguín Coca, Javier, Estupiñan López, Francisco H., Almeraya Calderón, Facundo

“…Citric acid does work as a passivating solution, and in some cases, the corrosion resistance of the stainless steel was comparable to that of nitric acid.…”
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Copper Induces Damage, Oxidative Stress and Cell Death in Endothelium of Chronic Intoxicated Wistar Rats por Fernández Rodarte, Bernardo Alfonso, Soto Domínguez, Adolfo, González Navarro, Alejandro, Mellado Ayala, Maximiliano, Piña Mendoza, Edgar, Rodríguez Rocha, Humberto, Montes de Oca Luna, Roberto, Guerra Leal, Jesús Dante

“…Reactive Oxygen Species (ROS) are part of the functional balance of various systems, they can generate cellular damage by oxidative stress associated with disease processes such as atherosclerosis, cardiovascular disease, diabetes, and aging. Some studies report that copper induces damage to the endothelium, which could be associated with cardiovascular pathologies. …”
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Análisis de la competencia en la industria cementera en México por De La Garza Garza, Oscar Javier, Arteaga García, Julio César

“…Aunque los resultados no son robustos, no se puede descartar que la competencia sea de tipo Stackelberg; tampoco se puede descartar que las empresas cementeras en México se comporten como en el modelo de Cournot ABSTRACT:There are some key sectors or industries in the economy of a country.Examples are telecommunications, transportation, commercial banking,construction, energy, among others. …”
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Estándares característicos de una escuela internacional: el impacto de la acreditación internacional de programas en la educación superior por Barragán Codina, José Nicolás

“…Quality in education is something that is not easy to figure out, in the perspective on how to measure the quality in education, perhaps the only way to measure quality in education is to measure the actual results from education, such as graduates, course syllabus, and some others. The aim of this article is to provide more information on the basics characteristic in higher education that might be able to help educational institutions to organize efforts that could lead them to apply quality in the higher education as they would like, and also as a differentiation strategy.…”
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Access and use of health care services by mothers and children in the Texas-Mexico border region: preliminary findings from the 2006 Rio Grande Valley health survey por Reagan, Patricia B., Pagán, José A.

“…Background: Latino/a children have the highest rate of uninsurance among all ethnic/racial groups. There is some evidence that patterns of health care use between parents and their children are interrelated. …”
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Trimetallic nanostructures: the case of AgPd–Pt multiply twinned nanoparticles por Khanal, Subarna, Bhattarai, Nabraj, Velázquez Salazar, J. Jesús, Bahena, Daniel, Soldano, German, Ponce, Arturo, Mariscal, Marcelo M., Mejía Rosales, Sergio, Yacamán, Miguel José

“…The nanoparticles were small in size, with an average diameter of 11 nm and a narrow distribution, and their characterization by aberration corrected scanning transmission electron microscopy allowed us to probe the structure of the particles at an atomistic level. In some nanoparticles, the formation of a hollow structure was also observed, that facilitates the alloying of Ag and Pt in the shell region and the segregation of Ag atoms on the surface, affecting the catalytic activity and stability. …”
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Thin films of Cu, In and Sb chalcogenides as photovoltaic absorbers por Ornelas Acosta, Raúl Ernesto

“…On the other hand, quaternary CZTSSe which contain abundant and inexpensive elements like Cu, Zn, Sn, S and Se has been a potential candidate for PV technology having solar cell efficiency up to 12.6%, however, there are still some challenges that must be accomplished for this material. …”
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Efecto de la microestructura y la concentración del ácido en la corrosión de aleaciones binarias Pb-Sn por Borrego Navejas, Rocío

“…Lead is a rare element in earth’s crust, but since it is found in concentrated deposits it can be produced at low cost, and ranks fifth in tonnage consumed after iron, copper, aluminum and zinc. Some of the many applications of lead are: automobile batteries, uninterruptible power sources, radiation shields in nuclear facilities or medical x-ray apparatus, etc. …”
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On aerodynamics of baseball pitches: reconstruction of spinning throws, and a lift force model for the knuckleball por Aguirre López, Mario Alberto

“…On the other hand, there are some methods to reconstruct baseball trajectories, however, these methods do not usually deal with the movement equations, and if they do, its by knowing a lot of points of the real trajectory. …”
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Estimación de los niveles ambientales de formaldehido en clínicas de odontopediatría. por Villarreal González, Adela Andrea

“…ABSTRACT Introduction In any health profession, we are constantly obliged not only to ensure the health of our patients but also to value and ensure our health at all times, when we must ask ourselves if the materials we use for our routine treatments could cause us some adverse effect. objective Analyze the concentration of environmental formaldehyde levels in the postgraduate clinics of Pediatric Dentistry and Dental Modules. …”
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Thin films of Cu, In and Sb chalcogenides as photovoltaic absorbers por Ornelas Acosta, Raúl Ernesto

“…On the other hand, quaternary CZTSSe which contain abundant and inexpensive elements like Cu, Zn, Sn, S and Se has been a potential candidate for PV technology having solar cell efficiency up to 12.6%, however, there are still some challenges that must be accomplished for this material. …”
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Efecto de la microestructura y la concentración del ácido en la corrosión de aleaciones binarias Pb-Sn por Borrego Navejas, Rocío

“…Lead is a rare element in earth’s crust, but since it is found in concentrated deposits it can be produced at low cost, and ranks fifth in tonnage consumed after iron, copper, aluminum and zinc. Some of the many applications of lead are: automobile batteries, uninterruptible power sources, radiation shields in nuclear facilities or medical x-ray apparatus, etc. …”
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Elementos para una teoría del lenguaje de los textos periodísticos impresos. Una modalidad discursiva. por Guerra, Yamile Haber

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Aportes al objeto de estudio de la comunicación, una propuesta desde la psicología cognitiva por Pérez Rojas, Luis Beltrán

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Consumo televisivo en Torreón: distribuciones por sexo, edad y escolaridad por López, Blanca Chong, Álvarez, Hugo García, Ramos, Gabriela Aguilar

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