{"id":18981,"date":"2018-03-09T09:07:47","date_gmt":"2018-03-09T09:07:47","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-y-purificacion-del-pigmento-de-streptococcus-agalactiae\/"},"modified":"2018-03-09T09:07:47","modified_gmt":"2018-03-09T09:07:47","slug":"estudio-y-purificacion-del-pigmento-de-streptococcus-agalactiae","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-medicas\/estudio-y-purificacion-del-pigmento-de-streptococcus-agalactiae\/","title":{"rendered":"Estudio y purificaci\u00f3n del pigmento de streptococcus agalactiae"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Javier Rodr\u00edguez Granger <\/strong><\/h2>\n<p>Desde hace m\u00e1s de 30 a\u00f1os se conoce que egb en ausencia de medidas de prevenci\u00f3n es la principal causa de infecci\u00f3n bacteriana del reci\u00e9n nacido.  la identificaci\u00f3n de egb puede realizarse por demostraci\u00f3n de su ant\u00edgeno espec\u00edfico de grupo, por el test camp o de manera muy f\u00e1cil por detecci\u00f3n del pigmento rojo caracter\u00edstico en medio granada.  a pesar de que esta caracter\u00edstica es patognom\u00f3nica de s.Agalactiae y esta ligada a la producci\u00f3n de hemolisina y a la patogenicidad existe un total desconocimiento de la naturaleza del pigmento de egb. La \u00fanica hip\u00f3tesis propuesta es que se trate de caroteno habi\u00e9ndose incluso postulado la presencia de dos pigmentos distintos. El \u00fanico fundamento de esta hip\u00f3tesis es la pr\u00e1ctica identidad del espectro uv-visible de este pigmento con el del beta coroteno, llegando incluso a observarse un pico de absorci\u00f3n cis a 380 nm.  el desconocimiento de la naturaleza del pigmento de egb es debido a la dificultad de conseguirlo en forma pura para poder estudiarlo. Y la dificultad de obtener el producto puro est\u00e1 ligada a su insolubilidad en los disolventes de manejo f\u00e1cil en el laboratorio.  el \u00fanico disolvente \u00fatil que hemos encontrado capaz de extraer y disolver el pigmento de s.Agalactiae es el dmso \u00e1cido. Pero obviamente sus caracter\u00edsticas de disolvente universal hacen que codisuelva muchas otras sustancias dificultando la purificaci\u00f3n del pigmento. As\u00ed mismo las separaciones utilizando este disolvente est\u00e1n dificultades por su acci\u00f3n corrosiva sobre el instrumento p.Ej.Cromatografos, liofilizadores (columnas, juntas, tubos, etc.).  otra caracter\u00edstica que dificulta la purificaci\u00f3n del pigmento es su uni\u00f3n en forma de complejo con maltopolisac\u00e1ridos al que permanece unido cuando se consigue extraer.  en base a este estudio podemos aportar los siguientes datos:  1,- solo existe un \u00fanico pigmento en egb que puede adoptar dos conformaciones en las bacterias y en los<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio y purificaci\u00f3n del pigmento de streptococcus agalactiae<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio y purificaci\u00f3n del pigmento de streptococcus agalactiae <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Javier Rodr\u00edguez Granger <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Granada<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 17\/09\/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>Manuel De La Rosa  Fraile<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: guillermo Guimenez gallego <\/li>\n<li>Fernando Reyes benitez (vocal)<\/li>\n<li>Antonio Sampedro mart\u00ednez (vocal)<\/li>\n<li> Miranda carranza Jos\u00e9 Antonio (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Javier Rodr\u00edguez Granger Desde hace m\u00e1s de 30 a\u00f1os se conoce que egb en ausencia de medidas [&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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