{"id":72287,"date":"2018-03-09T23:17:02","date_gmt":"2018-03-09T23:17:02","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/alta-presion-isostatica-estudio-del-color-y-de-la-fraccion-lipa%c2%addica-de-productos-ava%c2%adcolas\/"},"modified":"2018-03-09T23:17:02","modified_gmt":"2018-03-09T23:17:02","slug":"alta-presion-isostatica-estudio-del-color-y-de-la-fraccion-lipa%c2%addica-de-productos-ava%c2%adcolas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-tecnologicas\/alta-presion-isostatica-estudio-del-color-y-de-la-fraccion-lipa%c2%addica-de-productos-ava%c2%adcolas\/","title":{"rendered":"Alta presi\u00f3n isost\u00e1tica: estudio del color y de la fracci\u00f3n lip\u00eddica de productos av\u00edcolas"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Elena Beltran Torres <\/strong><\/h2>\n<p>El objetivo general de la tesis doctoral es evaluar el color y la estabilidad lip\u00eddica de carne de pollo y yema de huevo tratadas por alta presi\u00f3n con el fin de garantizar su calidad sanitaria y su conservaci\u00f3n en el tiempo.  el trabajo se estructura en cuatro experimentos. Los tres primeros tratan sobre carne y el \u00faltimo sobreyema. Las variables estudiadas son: tratamiento de presi\u00f3n (500, 200 y 900 mpa), de temperatura (80 y 90\u00c2\u00bac), envasado al vac\u00edo o al aire ambiente, tiempo de almacenamiento, acci\u00f3n mec\u00e1nica intensa, ph, pro-oxidantes y antioxidantes.  las t\u00e9cnicas anal\u00edticas empleadas son: test del tba, microextracci\u00f3n en ase s\u00f3lida (spme), cuantificaci\u00f3n de hidroper\u00f3xidos, an\u00e1lisis de compuestos de oxidaci\u00f3n mediante absorci\u00f3n ultravioleta, determinaci\u00f3n del perfil de \u00e1cidos grasos y medida de las coordenadoras de color.  los m\u00e9todos empleados para cuantificar tbars (test del tba) y hexanal (spme) en pechuga produjeron resultados correlacionados. Las dos t\u00e9cnicas son v\u00e1lidas para evaluar la oxidaci\u00f3n lip\u00eddica. El procedimiento seguido para medir hidroper\u00f3xidos en yema se debe ajustar para obtener valores representativos y la cuantificaci\u00f3n de compuestos de oxidaci\u00f3n mediante absorci\u00f3n ultravioleta no resulta \u00fatil.  los resultados indican que las dos materias primas evaluadas se diferencian visualmente de las no tratadas tras la aplicaci\u00f3n de alta presi\u00f3n a color. en la carne, los cambios de color son m\u00e1s intensos al tratar por presi\u00f3n que por calor convencional mientras que en la yema ocurre lo contrario.  el tratamiento a 500 mpa es significativamente menos prooxidante que la cocci\u00f3n convencional en carne de pollo conservada al vac\u00edo en refrigeraci\u00f3n. sin embargo, la integridad de la estructura celular es un factor esencial para prevenir la oxidaci\u00f3n de carne  al ser tratada por alta presi\u00f3n, pues si \u00e9sta se da\u00f1a intensamente antes del tratamiento, aumenta su susceptibilidad da la oxidac<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Alta presi\u00f3n isost\u00e1tica: estudio del color y de la fracci\u00f3n lip\u00eddica de productos av\u00edcolas<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Alta presi\u00f3n isost\u00e1tica: estudio del color y de la fracci\u00f3n lip\u00eddica de productos av\u00edcolas <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Elena Beltran Torres <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 14\/01\/2005<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>mur Francesch Mor<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: jean-louis Thapon <\/li>\n<li>Ana cristina Barroeta lajusticia (vocal)<\/li>\n<li>magdalena Rafecas (vocal)<\/li>\n<li>dolors Par\u00e9s oliva (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Elena Beltran Torres El objetivo general de la tesis doctoral es evaluar el color y la estabilidad [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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