Browsing by Author "201-0011046"
Now showing items 1-14 of 14
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(SOCIEDAD CHILENA DE QUIMICA, 2001-06)The alkaline degradation of bleached kraft cellulose from Pinus Radiata and Eucalyptus Globulus in a 30% NaOH w/w solution over the time was studied. Both types of cellulose showed at the beginning, first hour, a fast drop ...
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(ELSEVIER SCIENCE BV, 2004-01)The aim of this work was to evaluate the possibility of using mixtures and/or polyelectrolyte complexes from both chitosan-alginate and chitosan-carrageenan as prolonged drug release systems. Different dissolution profiles ...
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(Universidad de Chile, 2016)En el área farmacéutica, la investigación en nanotecnología ha tenido un progreso sostenido en la última década. El desarrollo de este tipo de sistema, ha permitido incrementar la solubilidad, la biodisponibilidad, la ...
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(SOCIEDAD CHILENA DE QUIMICA, 2002-09)Kraft bleached cellulose from Pinus radiata was submitted to methylation reactions in heterogeneous media. After activation with 29% (w/w) NaOH solution, methylation reactions were carried out both with dimethyl sulfate ...
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(Universidad de Chile, 2007)El objetivo de este trabajo fue el de elaborar películas comestibles biodegradables en base a mezcla de un extracto acuoso proteico de quínoa (EAP) y de una solución de quitosano (Qo), determinando sus propiedades mecánicas ...
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Estudio de disolución de pulpa mecánica en la mexcla dimetilacetamida/cloruro de litio (DMAc/LiCl) (Sociedad Chilena de Química, 1994)Se estudiaron dos procedimientos para la disolución de la pulpa mecánica (PM). Un método en caliente permitió disolver la pulpa en un 63,5% y un método en frío o de intercambio de solvente que solo permitió disolver un 10,1%.
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(SOCIEDAD CHILENA DE QUIMICA, 2001-06)This communication describes the application of a hollow-fiber-type solid supported liquid membrane technique to the study of recovery and enrichment of molybdenum with Alamine 336 (a long chain tertiary amine) from acid ...
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(Universidad de ChileCyberDocs, 2012)Debido a la constante necesidad de preservar los alimentos, el hombre ha desarrollado diversos sistemas de conservación, entre ellos la utilización de películas comestibles que protegen al alimento del medio y retardan la ...
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(Universidad de Chile, 2005)El objetivo de este trabajo fue el de desarrollar films de Quitosano, Alginato y de Complejo Polielectrolito Quitosano – Alginato (CPEQA), evaluar sus propiedades físicas y mecánicas y seleccionar los films mas adecuados ...
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(WILEY-BLACKWELL PUBLISHING, 2009-10)P>The amino acid composition and the physicochemical and functional properties of quinoa flour proteins (QFP) were evaluated during storage (at 20, 30 and 40 degrees C). Quinoa flour showed a protein content of 14.2 +/- ...
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(Universidad Nacional del Sur y Consejo de Investigaciones Científicas y Técnicas, 1996)The etherification reaction of mechanic pulp (MP) with dimethylsulphate (DMS) in homogeneous media was studied using a 2 5-1 fractional factional experimental design. In according to this model the quantity of DMS/2 g ...
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(GOVI-VERLAG GMBH, 2002-11)The aim of this work was to study the performance of chitosan (CB) grafted with acrylamide (CB-g-A) as prolonged drug release matrix as compared with unmodified chitosan. A non-pH dependent swelling behaviour for the matrix ...
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(BIOMACROMOLECULES 6(5):2389-2395, 2005-09)The aim of this work was to establish the diltiazem hydrochloride release mechanism from the chitosan-alginate matrix tablet (MCB/AS) and chitosan-carrageenan matrix tablet (MCS/CSI). The weight loss for MCS/CSI is mainly ...
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Synthesis and unusual swelling behavior of combined cationic/non-ionic hydrogels based on chitosan (WILEY-V C H VERLAG GMBH, 2003-10-15)Hydrogel-forming copolymers based on chitosan grafted with different amounts of polyacrylamide were synthesized and its swelling capacity determined in distilled water, sodium chloride solutions, as well as in buffer ...
