Browsing Artículos Científicos by Author "2d8abda0-f06f-494c-b360-01412e3b7847"
Now showing items 1-9 of 9
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Conductivismo y constructivismo. ¿Qué modelo usar?
abril, diana
; ; ; ; (2011)
En este trabajo comparamos los resultados académicos obtenidos por dos grupos de estudiantes que fueron enseñados con dos modelos pedagógicos distintos: constructivismo y conductismo. Ambos grupos estaban compuestos por ...
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Development of eco-friendly polyurethane foams based on Lesquerella fendleri (A. Grey) oil-based polyol
; ; ; ; ; ; ; ; ; ; abril, diana (2020)
In this study, we investigated the potential of polyurethane foams (LPUF) prepared from Lesquerella fendleri (A. Grey) oil-derived polyol to use as an ecological and cheap substitute for the petroleum-based polyurethane ...
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Ideas previas sobre la química en alumnos que ingresan a la carrera de pedagogía en ciencias de la Universidad Católica del Maule, Chile
abril, diana; ; (2013)
Se describen preconcepciones sobre química en alumnos que ingresan a la Pedagogía en Ciencias. Se aplicaron dos test, uno de conocimientos de química y un test KPSI para declarar lo que creen saber sobre los contenidos. ...
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Kinetic and adsorption isotherms of polyamine on bleached pulp of sugar cane bagasse
abril, diana; (2016)
This work presents the results of a study of kinetic and adsorption isotherms of a cationic polyamine on bleached pulp of sugar cane bagasse. Polyamine was synthesized at laboratory scale and used in an experimental trial ...
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Obtención y caracterización de carbones activados preparados a partir de cenizas volantes de una planta de cogeneración en Constitución, Chile
; abril, diana (2013)
El alto costo de la producción de carbones activados (CA) ha llevado a la búsqueda de nuevas materias primas de bajo costo y alta disponibilidad, en donde las cenizas volantes (CV) surgen como una alternativa a ser ...
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Preparation of renewable bio-polyols from two species of colliguaja for rigid polyurethane foams
abril, diana; ; ; ; ; (2018)
In this study, we investigated the potential of two non-edible oil extracts from seeds of Colliguaja integerrima (CIO) and Colliguaja salicifolia (CSO) to use as a renewable source for polyols and, eventually, polyurethane ...
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Sugar cane bagasse prehydrolysis using hot water
abril, diana; ; (2012)
Results are presented on the hot water prehydrolysis of sugar cane bagasse for obtaining ethanol by fermentation. The experimental study consisted of the determination of the effect of temperature and time of prehydrolysis ...
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Synthesis of gum acacia capped polyaniline-based nanocomposite hydrogel for the removal of methylene blue dye
; ; ; abril, diana; (2021)
In this research work, a novel gum acacia capped polyaniline-based nanocomposite hydrogel (GPA NCHs) was developed and evaluated for the adsorptive removal of cationic methylene blue dye (MB) from aqueous solutions. Firstly, ...
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Volatiles from Lapageria rosea Ruiz et Pav. red flower
; abril, diana; ; ; (2013)
The chemical composition of the volatile compounds isolated by simultaneous distillation–extraction with diethyl ether from red flowers of red copihue (Lapageria rosea) growing in Chile was investigated by gas ...