{"id":61928,"date":"2018-03-09T22:49:48","date_gmt":"2018-03-09T22:49:48","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/patinas-oscuras-sobre-rocas-grana%c2%adticas-genesis-y-composicion\/"},"modified":"2018-03-09T22:49:48","modified_gmt":"2018-03-09T22:49:48","slug":"patinas-oscuras-sobre-rocas-grana%c2%adticas-genesis-y-composicion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-tierra-y-del-espacio\/patinas-oscuras-sobre-rocas-grana%c2%adticas-genesis-y-composicion\/","title":{"rendered":"P\u00e1tinas oscuras sobre rocas gran\u00edticas: g\u00e9nesis y composici\u00f3n"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Noelia Aira Touz\u00f3n <\/strong><\/h2>\n<p>Las superficies rocosas expuestas a la intemperie sufren una serie de transformaciones, siendo una de las m\u00e1s evidentes la aparici\u00f3n de p\u00e1tinas negras. Cuando las rocas forman parte de edificaciones y monumentos estas p\u00e1tinas suponen un importante problema de conservaci\u00f3n ya que provocan, cuando menos, un perjuicio est\u00e9tico y en muchos casos contribuyen a su alteraci\u00f3n. En este trabajo se estudia la naturaleza y los procesos de formaci\u00f3n de p\u00e1tinas negras formadas sobre superficies gran\u00edticas tanto en el medio natural, es decir sobre afloramientos rocosos, como sobre edificios rurales y urbanos de inter\u00e9s hist\u00f3rico-art\u00edstico de galicia. Con ello se pretende determinar la influencia del factor ambiente en la formaci\u00f3n de dichas p\u00e1tinas. Se trata de un estudio multidisciplinar en el que el an\u00e1lisis de las p\u00e1tinas se aborda desde los puntos de vista morfol\u00f3gico, mineral\u00f3gico, qu\u00edmico y biol\u00f3gico; se ha prestado una especial atenci\u00f3n a la caracterizaci\u00f3n biol\u00f3gica ya que se presupon\u00eda que los organismos tendr\u00edan un importante papel en la formaci\u00f3n de estas alteraciones crom\u00e1ticas. Las t\u00e9cnicas y m\u00e9todos anal\u00edticos empleados en este estudio fueron: microscop\u00eda electr\u00f3nica de barrido y microan\u00e1lisis mediante microsonda de fluorescencia de rayos-x asociada a este microscopio, medici\u00f3n del color en el espacio l*a*b* empleando un color\u00edmetro para s\u00f3lidos, difracci\u00f3n de rayos-x, an\u00e1lisis elemental de c, h, n y s, an\u00e1lisis qu\u00edmico de elementos mayoritarios y elementos traza mediante fluorescencia de rayos-x, espectroscopia de infrarrojo raman, determinaci\u00f3n del contenido de prote\u00ednas y clorofila, cromatograf\u00eda de gases para an\u00e1lisis de \u00e1cidos grasos y, por \u00faltimo, identificaci\u00f3n de los organismo presentes en las p\u00e1tinas por t\u00e9cnicas de biolog\u00eda molecular. de los resultados obtenidos se deduce en primer lugar que las p\u00e1tinas de los afloramientos son muy diferentes de las de las edificaciones. Las primeras son fundamentalmente<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>P\u00e1tinas oscuras sobre rocas gran\u00edticas: g\u00e9nesis y composici\u00f3n<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 P\u00e1tinas oscuras sobre rocas gran\u00edticas: g\u00e9nesis y composici\u00f3n <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Noelia Aira Touz\u00f3n <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Santiago de compostela<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 14\/12\/2007<\/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>Beatriz Prieto Lamas<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Antonio Mart\u00ednez Cortizas <\/li>\n<li> L\u00f3pez D\u00edaz Ana Jes\u00fas (vocal)<\/li>\n<li>Angeles Prieto Fernandez (vocal)<\/li>\n<li>Valme Jurado Lobo (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Noelia Aira Touz\u00f3n Las superficies rocosas expuestas a la intemperie sufren una serie de transformaciones, siendo una [&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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