{"id":73541,"date":"2018-03-09T23:18:26","date_gmt":"2018-03-09T23:18:26","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/determinacion-de-anitioxidantes-en-poliolefinas-y-sus-niveles-de-migracion\/"},"modified":"2018-03-09T23:18:26","modified_gmt":"2018-03-09T23:18:26","slug":"determinacion-de-anitioxidantes-en-poliolefinas-y-sus-niveles-de-migracion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/determinacion-de-anitioxidantes-en-poliolefinas-y-sus-niveles-de-migracion\/","title":{"rendered":"Determinaci\u00f3n de anitioxidantes en poliolefinas y sus niveles de migraci\u00f3n"},"content":{"rendered":"

Tesis doctoral de M\u00aa Sonia Dopico Garc\u00eda <\/strong><\/h2>\n

Este trabajo se centra en el estudio del comportamiento de evnases de poliolefinas de uso alimentario en los ensayos de migraci\u00f3n. El estudio se centra en los siguientes puntos: – se propone una metodolog\u00eda anal\u00edtica alternativa al m\u00e9todo oficial para la determinaci\u00f3n de migraci\u00f3n global en aceite de oliva que permite la cuantificaci\u00f3n del aceite absorbido por el material pl\u00e1stico mediante extracci\u00f3n con energ\u00eda de ultrasonidos y determinaci\u00f3n mediante cromatograf\u00eda de l\u00edquidos de alta eficacia (hplc) con detector evaporativo de dispersi\u00f3n de luz (elsd). – se ponen a punto dos m\u00e9todos cromatogr\u00e1ficos que permiten la separaci\u00f3n y cuantificaci\u00f3n simult\u00e1nea de antioxidantes primarios y secundarios en los simulantes de alimentos (acuosos y aceite de oliva) por hplc en fase inversa y detecci\u00f3n ultravioleta (uv) con red de diodos, para los que se obtiene par\u00e1metros de calidad satisfactorios. – se desarrollan m\u00e9todos de pretratamiento de la muestra que mejoran la sensibilidad de los an`alisis de migraci\u00f3n espec\u00edfica de antioxidantes en simulantes de alimentos, utilizando t\u00e9cnicas de extracci\u00f3n l\u00edquido l\u00edquido (ll) y extracci\u00f3n en fase s\u00f3lida (spe). – se pone a punto una etapa de extracci\u00f3n mediante energ\u00eda de mmicrondas de los antioxidantes a partir de muestras de poliolefinas, previa a su cuantificaci\u00f3n por hplc-uv, con el fin de determinar los niveles de concentraci\u00f3n de antioxidantes presentes en la poliolefina. – se estudia la estabilidad de los anitioxidantes en los simulantes de alimentos en las condiciones de los ensayos de migraci\u00f3n. – se estudian envases comerciales de poliolefinas de uso alimentario determinando los antioxidantes utilizados con m\u00e1s frecuencia, su concentraci\u00f3n en la matriz y sus niveles de migraci\u00f3n espec\u00edfica. -se estudia un material de polietileno de baja densidad (pebd) extru\u00eddo para caracterizar las posibles relaciones existentes entre los niveles de migraci\u00f3n<\/p>\n

 <\/p>\n

Datos acad\u00e9micos de la tesis doctoral \u00abDeterminaci\u00f3n de anitioxidantes en poliolefinas y sus niveles de migraci\u00f3n<\/strong>\u00ab<\/h3>\n
    \n
  • T\u00edtulo de la tesis:<\/strong>\u00a0 Determinaci\u00f3n de anitioxidantes en poliolefinas y sus niveles de migraci\u00f3n <\/li>\n
  • Autor:<\/strong>\u00a0 M\u00aa Sonia Dopico Garc\u00eda <\/li>\n
  • Universidad:<\/strong>\u00a0 A coru\u00f1a<\/li>\n
  • Fecha de lectura de la tesis:<\/strong>\u00a0 14\/04\/2005<\/li>\n<\/ul>\n

     <\/p>\n

    Direcci\u00f3n y tribunal<\/h3>\n
      \n
    • Director de la tesis<\/strong>\n
        \n
      • Gonz\u00e1lez Rodr\u00edguez M\u00aa Victoria<\/li>\n<\/ul>\n<\/li>\n
      • Tribunal<\/strong>\n
          \n
        • Presidente del tribunal: Barral losada Luis fernando <\/li>\n
        • Mar\u00edn nieto M\u00aa Luisa (vocal)<\/li>\n
        • perfecto Paseiro losada (vocal)<\/li>\n
        • Garde belza Jos\u00e9 \u00e1ngel (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

           <\/p>\n","protected":false},"excerpt":{"rendered":"

          Tesis doctoral de M\u00aa Sonia Dopico Garc\u00eda Este trabajo se centra en el estudio del comportamiento de evnases de poliolefinas […]<\/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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[18576,1595,11975,17,18],"tags":[35045,159612,159610,159611,159609,2582],"class_list":["post-73541","post","type-post","status-publish","format-standard","hentry","category-a-coruna","category-analisis-cromatografico","category-analisis-de-polimeros","category-quimica","category-quimica-analitica","tag-barral-losada-luis-fernando","tag-garde-belza-jose-angel","tag-gonzalez-rodriguez-ma-victoria","tag-marin-nieto-ma-luisa","tag-ma-sonia-dopico-garcia","tag-perfecto-paseiro-losada"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/73541","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=73541"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/73541\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=73541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=73541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=73541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}