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http://repositoriodigital.ipn.mx/handle/123456789/10924| Título : | Estudio de la Influencia del Ca(OH)2 en las Películas de Pericarpio de Maíz Nixtamalizado mediante Técnicas Fototérmicas |
| Palabras clave : | Tecnicas fototermicas Pericarpio de maiz |
| Fecha de publicación : | 16-ene-2013 |
| Editorial : | Superficies y Vacio |
| Descripción : | We present a study of the influence of the Ca(OH)2 on the thermal and optical properties on pericarp films obtained from
nixtamalized corn grains using photothermal techniques. Besides this, we studied the calcium integration and the
morphological changes in these biopolymers by using x-ray diffraction analysis and optical microscopy. The
nixtamalization process was performed using alkaline solutions with different Ca(OH)2 concentrations. We obtained that
the thermal diffusivity of the pericarp films has a remarkable increase with the Ca(OH)2 concentration used in the
nixtamalization process, which can be explain with our results of a calcium penetration and integration in form of CaCO3
microcrystals in these biopolymers and mainly the degradation in its layers by the alkali medium action of hemicellulose
dissolution, especially the most external layers: cuticle and epidermis. The analysis of optical absorption spectra show the
presence of o-glycosides pigments type flavonoids in the pericarp which are sensitive to alkali medium and they are
characterized by a remarkable absorption band between 400 and 450 nm which give the characteristic yellow
pigmentation in these biopolymers. Research article of journal indexed in Padron-CONACYT Mexico Instituto Politecnico Nacional |
| URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/10924 |
| Otros identificadores : | 1665-3521 http://hdl.handle.net/123456789/434 |
| Aparece en las colecciones: | Doctorado |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| 1999 S&V v8 p80 Ca-pericarp.pdf | 104.31 kB | Adobe PDF | Visualizar/Abrir |
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