{"id":18103,"date":"2002-05-07T00:00:00","date_gmt":"2002-05-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/incorporacion-de-agentes-de-tensoactivos-a-geles-de-carbopol-fenomenos-asociativos-y-aplicaciones-farmaceuticas\/"},"modified":"2002-05-07T00:00:00","modified_gmt":"2002-05-07T00:00:00","slug":"incorporacion-de-agentes-de-tensoactivos-a-geles-de-carbopol-fenomenos-asociativos-y-aplicaciones-farmaceuticas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-medicas\/incorporacion-de-agentes-de-tensoactivos-a-geles-de-carbopol-fenomenos-asociativos-y-aplicaciones-farmaceuticas\/","title":{"rendered":"Incorporaci\u00f3n de agentes de tensoactivos a geles de carbopol. fen\u00f3menos asociativos y aplicaciones farmac\u00e9uticas."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Rafael Barreiro Iglesias <\/strong><\/h2>\n<p>Se estudiaron los fen\u00f3menos de interacci\u00f3n entre el carbopol 934nf y cuatro agentes tensoactivos, tween 80, pluronic f-127, dodecilsufato s\u00f3dico y cloruro de benzalconio, y se evaluaron sus repercusiones sobre las propiedades de los geles.  para ello se llevaron a cabo estudios de viscosimetr\u00eda capilar, medidas de tensi\u00f3n superficial, conductividad, ph, hidrosolubilizaci\u00f3n de colorantes y marcadores fluorescentes. Adicionalmente, se procedi\u00f3 al an\u00e1lisis de films, obtenidos por desecaci\u00f3n de las dispersiones carbopol\/tensoactivo, mediante la colorimetr\u00eda diferencial de barrido y espectroscop\u00eda de infrarrojos. la informaci\u00f3n obtenida permiti\u00f3 estimar los valores de la concentraci\u00f3n de agregaci\u00f3n. Finalmente, se caracterizaron termodin\u00e1micamente los procesos de interacci\u00f3n y se estimaron los correspondientes valores de entalp\u00eda por microcalorimetr\u00eda isoperif\u00e9rica.  la intensa reticulaci\u00f3n de las cadenas acr\u00edlicas crea en los microgeles un microentorno m\u00e1s favorable para que se produzca la interacci\u00f3n que en los pol\u00edmeros acr\u00edlicos lineales. Los agregados con los tensoactivos no i\u00f3nicos se producen como consecuencia del establecimiento de puentes de hidr\u00f3geno. Con el dodecilsufato s\u00f3dico y con el cloruro de benzalconio se establecen uniones hidrof\u00f3bicas y de intercambio i\u00f3nico, respectivamente. en cloruro s\u00f3dico al 0,9%, el comportamiento fue similar al observado en agua; sin embargo, en fluido lacrimal artificial la intensidad de las interacciones se redujo notablemente.  en general, la incorporaci\u00f3n de los tensoactivos, modific\u00f3 considerablemente la viscosidad, el m\u00f3dulo el\u00e1stico y el m\u00f3dulo el\u00e1stico y el m\u00f3dulo viscoso de los geles de carbopol, que, sin embargo, mantienen su capacidad de gelificaci\u00f3n in situ. Especialmente relevante es el efecto del tween 80 y del pluronic f-127 que el 0,01-0,05% incrementan entre 100 y 1000 veces los valores de los m\u00f3dulos el\u00e1stico y viscoso. Los tensoactivos i<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Incorporaci\u00f3n de agentes de tensoactivos a geles de carbopol. fen\u00f3menos asociativos y aplicaciones farmac\u00e9uticas.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Incorporaci\u00f3n de agentes de tensoactivos a geles de carbopol. fen\u00f3menos asociativos y aplicaciones farmac\u00e9uticas. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Rafael Barreiro Iglesias <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Santiago de compostela<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 05\/07\/2002<\/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>Angel Concheiro Nine<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: ram\u00f3n Mart\u00ednez pacheco <\/li>\n<li>Manuel Dolz planas (vocal)<\/li>\n<li>marina Herraez dominguez (vocal)<\/li>\n<li>visitaci\u00f3n Gallardo lara (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Rafael Barreiro Iglesias Se estudiaron los fen\u00f3menos de interacci\u00f3n entre el carbopol 934nf y cuatro agentes tensoactivos, [&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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