{"id":41145,"date":"1999-01-01T00:00:00","date_gmt":"1999-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/efectos-de-los-esfingolipidos-en-la-estructura-y-dinamica-de-las-membranas\/"},"modified":"1999-01-01T00:00:00","modified_gmt":"1999-01-01T00:00:00","slug":"efectos-de-los-esfingolipidos-en-la-estructura-y-dinamica-de-las-membranas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/efectos-de-los-esfingolipidos-en-la-estructura-y-dinamica-de-las-membranas\/","title":{"rendered":"Efectos de los esfingolipidos en la estructura y dinamica de las membranas."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Pilar Veiga Alameda <\/strong><\/h2>\n<p>Los resultados experimentales de esta tesis se pueden agrupar en dos bloques principales, uno referente al papel de los esfingol\u00edpidos en el comportamiento de fase de los fosfol\u00edpidos y otro a su papel en la generaci\u00f3n de dominios en el plano de la bicapa. se han estudiado los efectos de la ceramida, esfingosina y sus derivados fosforilados sobre dos transiciones de fase de fosfoglic\u00e9ridos: la lamelar gel-fluida y la lamelar-hexagonal. el distinto comportamiento de alguna de estas especies se relaciona con su geometr\u00eda molecular. Tambi\u00e9n se ha estudiado el comportamiento de mezclas lip\u00eddicas que incorporan esfingol\u00edpidos por esr. Todo ello ha conducido a establecer lo siguiente:  1. Los esfingol\u00edpidos modifican la transici\u00f3n de fase lamelar a hexagonal invertida en fosfatidiletanolaminas, facilitando en unos caos (p. Ej. ceramidas) y dificultando en otros (p. Ej. Esfingosina-1-fosfato) la transici\u00f3n, seg\u00fan la forma molecular de cada l\u00edpido concreto.  2. Esfingol\u00edpidos como las ceramidas o la esfingomielina, en mezclas con glicerofosfol\u00edpidos en fase lamelar, promueven la separaci\u00f3n lateral de fases, con dominios ricos en esfingol\u00edpidos, en fase gel y dominios ricos en fosfoglic\u00e9ridos en fase fluida.  3. En mezclas ternarias de esfingol\u00edpido, glicerofosfol\u00edpido y colesterol, el colesterol estabiliza de manera particularmente eficaz la existencia de dominios separados en fase gel y en fase l\u00edquido-ordenada.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Efectos de los esfingolipidos en la estructura y dinamica de las membranas.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Efectos de los esfingolipidos en la estructura y dinamica de las membranas. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Pilar Veiga Alameda <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Pa\u00eds vasco\/euskal herriko unibertsitatea<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1999<\/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>Alicia Alonso Izquierdo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 Mar\u00eda Macarulla greoles <\/li>\n<li>paavo Kinnunen (vocal)<\/li>\n<li> Gomez fernandez Juan  carmelo (vocal)<\/li>\n<li>Jes\u00fas Perez gil (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Pilar Veiga Alameda Los resultados experimentales de esta tesis se pueden agrupar en dos bloques principales, uno [&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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