{"id":144683,"date":"1993-01-01T00:00:00","date_gmt":"1993-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/cambios-del-contenido-lipidico-y-actividad-electrica-del-miocardio-de-rata-inducidos-por-el-envejecimiento\/"},"modified":"1993-01-01T00:00:00","modified_gmt":"1993-01-01T00:00:00","slug":"cambios-del-contenido-lipidico-y-actividad-electrica-del-miocardio-de-rata-inducidos-por-el-envejecimiento","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/cambios-del-contenido-lipidico-y-actividad-electrica-del-miocardio-de-rata-inducidos-por-el-envejecimiento\/","title":{"rendered":"\u00abcambios del contenido lipidico y actividad electrica del miocardio de rata inducidos por el envejecimiento\u00bb"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Ramona Armengol Rauet <\/strong><\/h2>\n<p>Objetivos: estudiar el efecto del envejecimiento en la composicion lipidica y en las propiedades electricas del miocardio de rata. Material y metodos: 64 ratas macho sprague-dawley distribuidas en 4 grupos de edad (6, 14, 20 y 25 meses). Identificacion de las fracciones lipidicas del miocardio (fosfatidilcolina -fc-, fosfatidiletanolamina-fe- cardiolipina-c1- y trigliceridos-tg) por cromatografia en capa fina.  cuantificacion de los acidos grasos de estas fracciones lipidicas por cromatografia de gases, y de fosfolipidos (f1) totales, colesterol (co1) y proteinas por colorimetria. Calculo del periodo refractario ventricular efectivo (prve) y frecuencia ventricular maxima (fvm) por la tecnica de estimulacion mediante extraestimulos.  resultados: el envejecimiento provoca: 1) en la fc y fe una disminucion de 18:2 y 22:6 y un aumento de 18:0; en la c1 una disminucion del 18:2 y un aumento del 18:1; 2) un aumento de la relacion col\/fi; 3) un aumento del prve y 4) una disminucion de la fvm. Conclusiones: el envejecimiento induce un aumento de los lipidos capaces de disminuir la fluidez de membrana lo cual podria estar en relacion con la prolongacion de la repolarizacion de la celula cardiaca vieja.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>\u00abcambios del contenido lipidico y actividad electrica del miocardio de rata inducidos por el envejecimiento\u00bb<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 \u00abcambios del contenido lipidico y actividad electrica del miocardio de rata inducidos por el envejecimiento\u00bb <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Ramona Armengol Rauet <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1993<\/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>Enrique Domingo Ribas<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Martinez Vazquez Jos\u00e9 M. <\/li>\n<li>Gaieta Permanyer Miralda (vocal)<\/li>\n<li>Amparo Alvarez Au\u00f1on (vocal)<\/li>\n<li>Eduard Escrich Escriche (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Ramona Armengol Rauet Objetivos: estudiar el efecto del envejecimiento en la composicion lipidica y en las propiedades [&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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