Caracterizacion Optica de Centros Absorbentes en Peliculas Biopolimericas Obtenidas de Pericarpio de Maíz

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Título :	Caracterizacion Optica de Centros Absorbentes en Peliculas Biopolimericas Obtenidas de Pericarpio de Maíz
Palabras clave :	Caracterizacion optica Pericarpio de maiz
Fecha de publicación :	16-ene-2013
Editorial :	Superficies y Vacio
Descripción :	We present a study about the optical caracterization of the absorption centers in corn pericarp biopolymers by means of the Photoacoustic Spectroscopy and Phase Resolved technique. Our results show that the 300-800 nm region of the absorption spectra of these films are constituted by two absorption centers superposition, one of these corresponding to the cellulose of the epidermis (300-350 nm UV region) and the other by pigments present in the hemicellulose of the pericarp (375-450 nm). We demonstrated that these kind of pigments correspond to o-glycosides flavonoids type, which are bound to hemicellulose sugars. We observed a spatial separation of the two absorption centers as a function of the Ca(OH)2 concentration used in the nixtamalization process and this separation is due to the hemicellulose dissolution in the most external leyers of these biopolymers. Research article of journal indexed in Padron-CONACYT Mexico Instituto Politecnico Nacional
URI :	http://www.repositoriodigital.ipn.mx/handle/123456789/10925
Otros identificadores :	1655-3521 http://hdl.handle.net/123456789/436
Aparece en las colecciones:	Doctorado

Ficheros en este ítem:

Fichero	Descripción	Tamaño	Formato
1999 S&V v8 p89 Abs pericarp.pdf		55.41 kB	Adobe PDF	Visualizar/Abrir

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