{"id":89336,"date":"2018-03-10T00:14:28","date_gmt":"2018-03-10T00:14:28","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sintesis-enzimatica-selectiva-de-6agalactosil-lactosa\/"},"modified":"2018-03-10T00:14:28","modified_gmt":"2018-03-10T00:14:28","slug":"sintesis-enzimatica-selectiva-de-6agalactosil-lactosa","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-tecnologicas\/sintesis-enzimatica-selectiva-de-6agalactosil-lactosa\/","title":{"rendered":"Sintesis enzimatica selectiva de 6\u00c2\u00bfgalactosil lactosa"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Val Conde Isabel Del <\/strong><\/h2>\n<p>En la presente tesis se ha llevado a cabo la s\u00edntesis selectiva de un trisac\u00e1rido, 6\u00c2\u00bfgalactosil lactosa, mediante una reacci\u00f3n de transglicosilaci\u00f3n catalizada por un preparado enzim\u00e1tico comercial, utilizando como substrato de partida lactosa.  en medio acuoso las condiciones \u00f3ptimas para la s\u00edntesis corresponden a un ph de 6,5, temperatura entre 40-50\u00c2\u00ba c y concentraci\u00f3n de lactosa de 286 g\/l disolvente. El rendimiento m\u00e1ximo obtenido en dichas condiciones fue de 18% p\/p con una selectividad de 62%. Adem\u00e1s se comprob\u00f3 el efecto inhibitorio de los monosac\u00e1ridos que se liberaban al medio como consecuencia de las reaccionies de transglicosilaci\u00f3n e hidr\u00f3lisis que ocurren simultaneamente en este proceso enzim\u00e1tico, por lo cual la retirada de los mismos conducir\u00eda hacia una mejora del rendimiento y la selectividad de la s\u00edntesis deseada.  el empleo de sistemas bif\u00e1sicos acuosos formados por polietilenglicol y sal, permiti\u00f3 la mejora en el rendimiento de trisac\u00e1rido respecto a los obtenidos en sistemas acuosos tradicionales, debido principalmente a la retirada selectiva de los productos de reacci\u00f3n de la fase en la que se situa el biocatalizador. El sistema peg 6000(9,9% p\/p)\/nah2po4 (6,6% p\/p) proporcion\u00f3 mejor rendimiento (24% p\/p) y selectividad (70%) en trisac\u00e1rido que los valores obtenidos en medio acuoso.  el preparado enzim\u00e1tico empleado en esta tesis es capaz de proporcionar similares niveles de trisac\u00e1rido que las enzimas de microorganismos mes\u00f3filos descritas anteriormente y resulta m\u00e1s selectivo para esta reacci\u00f3n que los preparados enzim\u00e1ticos term\u00f3filos utilizados hasta la fecha descritos en la literatura.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Sintesis enzimatica selectiva de 6\u00c2\u00bfgalactosil lactosa<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Sintesis enzimatica selectiva de 6\u00c2\u00bfgalactosil lactosa <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Val Conde Isabel Del <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 16\/03\/2001<\/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>Cristina Otero Hern\u00e1ndez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Francisco Congregado c\u00f3rdoba <\/li>\n<li>Jes\u00fas Jim\u00e9nez-barbero (vocal)<\/li>\n<li> Blanco martin rosa Mar\u00eda (vocal)<\/li>\n<li>pere Clap\u00e9s saborit (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Val Conde Isabel Del En la presente tesis se ha llevado a cabo la s\u00edntesis selectiva de [&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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