Browsing by Author "201-0011046"
Now showing items 1-13 of 13
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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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(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 ...
