Results 21 to 30 of about 31,237 (155)

Donde la termodinámica y las proteínas se encuentran

open access: yesEducación Química, 2018
Este es un ejemplo de cómo utilizar a las proteínas en la enseñanza de la termodinámica y, a la vez, de cómo emplear la termodinámica para estudiar el comportamiento fisicoquímico de las proteínas.
Sergio Romero-Romero   +2 more
doaj   +1 more source

Análisis de los errores que presentan los libros de texto universitarios de química general al tratar la energía libre de Gibbs [PDF]

open access: yes, 2009
Este estudio tiene como objetivo analizar la incorrecta representación de la energía libre por los libros de química general. El trabajo informa acerca de cómo manejan estos libros el criterio de espontaneidad y el de equilibrio químico.
Quílez, Juan
core   +3 more sources

Termodinâmica Estendida de Fluidos Viscosos com Condução de Calor

open access: yesTrends in Computational and Applied Mathematics, 2006
Termodinâmica estendida é uma teoria fenomenológica com o objetivo principal de determinar os campos de deformação, temperatura, tensão e fluxo de calor.
A. Vignatti, I. Shih Liu
doaj   +1 more source

Electrocatalytic Oxidation of Acetaminophen on a PVC/TTF-TCNQ Composite Electrode Modified by Gold Nanoparticles: Application as an Amperometric Sensor

open access: yesInternational Journal of Electrochemical Science, 2011
This work shows the electrocatalytic activity towards the oxidation of acetaminophen of a composite electrode PVC/TTF-TCNQ modified with gold nanoparticles.
Guadalupe Sánchez-Obrero   +4 more
doaj   +1 more source

¿Y si trabajan en grupo...? : Interacciones entre alumnos, procesos sociales y cognitivos en clases universitarias de física [PDF]

open access: yes, 2002
Este trabajo contiene algunos resultados de un estudio de caso referido a las características de las interacciones entre alumnos, mientras trabajan en grupo, en el contexto de una propuesta innovadora de enseñanza universitaria de física.
Colinvaux, Dominique   +2 more
core   +3 more sources

Temperature Effect on the Electrooxidation of Gamma Hydroxybutyric Acid (GHB) on Platinum Catalyst through Cyclic Voltammetry, Chronoamperometry, Impedance Spectroscopy and SERS Spectroelectrochemistry

open access: yesInternational Journal of Electrochemical Science, 2016
A study of the electro-oxidation of gamma hydroxybutyric acid (GHB) on platinum electrode in acidic media has been investigated by cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy in the temperature range between 5 and 30 ...
R. Jiménez-Pérez   +4 more
doaj   +1 more source

Squalene Extraction by Supercritical Fluids from Traditionally Puffed Amaranthus hypochondriacus Seeds

open access: yesJournal of Food Quality, Volume 2017, Issue 1, 2017., 2017
Extraction of squalene, a potent natural antioxidant, from puffed A. hypochondriacus seeds was performed by supercritical fluid extraction (SCFE); besides, to have a blank for comparison, extraction was performed also by Soxhlet method using organic solvents (hexane). Chemical proximal composition and seed morphology were determined in raw, puffed, and
Teresa Rosales-García   +7 more
wiley   +1 more source

Remoción de metales pesados en agua empleando bioadsorbentes magnéticos

open access: yesMundo Nano
En este trabajo se realizó la síntesis, caracterización y aplicación de un bioadsorbente de pectina – magnetita con propiedades magnéticas para remover metales pesados en soluciones acuosas.
Julia Guerra Hernández   +1 more
doaj   +1 more source

Effect of geometric parameters on the heat transfer performance of a submerged coil condenser for heat-pump water heating

open access: yesInternational Journal of Thermofluids
Water heating with heat pumps can contribute to reduce carbon dioxide emissions and meet sustainability goals due to its high thermal efficiency, versatility in terms of alternative energy sources and thermal energy storage capability. In this study, the
Santiago Valencia-Cañola   +3 more
doaj   +1 more source

A new Variable Curvature concept for Linear Fresnel Reflectors Solar Concentrating Systems [PDF]

open access: yes, 2017
In a Linear Fresnel Reflector (LFR) solar concentrating system [1] a series of single axis linear reflectors target the sunrays to a longitudinal facedown receiver on top of a fixed structure. The LFR technology offers simplicity and reduced costs when
Carrillo-Andres, Antonio   +3 more
core  

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