{"id":116980,"date":"2018-03-11T10:46:17","date_gmt":"2018-03-11T10:46:17","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/efecto-del-acido-na%c2%adtrico-en-la-variacion-de-color-de-pigmentos-de-uso-comun-en-obras-de-arte-pictoricas\/"},"modified":"2018-03-11T10:46:17","modified_gmt":"2018-03-11T10:46:17","slug":"efecto-del-acido-na%c2%adtrico-en-la-variacion-de-color-de-pigmentos-de-uso-comun-en-obras-de-arte-pictoricas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/colorimetria\/efecto-del-acido-na%c2%adtrico-en-la-variacion-de-color-de-pigmentos-de-uso-comun-en-obras-de-arte-pictoricas\/","title":{"rendered":"Efecto del \u00e1cido n\u00edtrico en la variaci\u00f3n de color de pigmentos de uso com\u00fan en obras de arte pict\u00f3ricas."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Mar\u00eda  Victoria Gomez Carretero <\/strong><\/h2>\n<p>El objetivo fundamental de esta tesis es describir y monitorizar el efecto de diversas concentraciones de \u00e1cido n\u00edtrico en la degradaci\u00f3n del color de once pigmentos de uso com\u00fan en obras de arte pict\u00f3ricas. As\u00ed mismo se busca conocer cu\u00e1l es el efecto de los par\u00e1metros tiempo de exposici\u00f3n y temperatura ambiental. Finalmente se efect\u00faa una comparaci\u00f3n entre la degradaci\u00f3n del color inducida por \u00e1cido n\u00edtrico y la que provocan el ozono y el ambiente real urbano. El cambio de color de los pigmentos se valora de manera cuantitativa, cualitativa y gr\u00e1fica, siguiendo el sistema cielab.  para la consecuci\u00f3n de estos objetivos se han efectuado una serie de experimentos de laboratorio y ensayos de campo. En el laboratorio se han recreado diferentes condiciones ambientales controladas de exposici\u00f3n por medio de un sistema din\u00e1mico de exposici\u00f3n para el \u00e1cido n\u00edtrico y el ozono respectivamente.  los resultados experimentales muestran que todos los pigmentos expuestos al \u00e1cido n\u00edtrico, al ozono y al ambiente real urbano sufren variaciones en su color original en dependencia del tiempo durante el que las muestras est\u00e1n sometidas a la acci\u00f3n del \u00e1cido n\u00edtrico, la concentraci\u00f3n del \u00e1cido n\u00edtrico y la temperatura ambiental. El cambio es diferente seg\u00fan la naturaleza de cada uno de los pigmentos, por lo que es razonable pensar que otros colorantes estrechamente relacionados con los de este estudio sean sensibles al \u00e1cido n\u00edtrico de una manera similar. &quot;\tthe main objective of this thesis is to describe and detail the effect of different concentrations of nitric acid in the fading of eleven pigments commonly used in art works. Likewise the study try to know what is the effect of the parameters time of exposure and environmental temperature on fading. Finally we made a comparison between color degradation induced by nitric acid and which cause the ozone and the real urban environment. Fading is valued using the cielab system quantitatively, qualitatively and graphically.  different laboratory experiments and field trials have been carried on for the achievement of these objectives. In the laboratory, several controlled environmental conditions of exposure have been recreated ,by the use of a dynamic system of exposure to nitric acid and ozone respectively.  results show that all the pigments exposed to nitric acid, ozone and to a real urban environment suffer variations in its original color, depending on time during the samples are exposed to the action of nitric acid, concentration of nitric acid and temperature. Fading is different according to the nature of each pigment, so it is reasonable to think that other pigments closely related of the ones studied are sensitive to nitric acid in a similar way.  &quot;\tt\u00e9rminos clave: 3308.01 control de la contaminaci\u00f3n atmosf\u00e9rica (ver 2509.02) 3303.13 tecnolog\u00eda de la conservaci\u00f3n 2501.05 qu\u00edmica atmosf\u00e9rica 2209.03 colorimetr\u00eda<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Efecto del \u00e1cido n\u00edtrico en la variaci\u00f3n de color de pigmentos de uso com\u00fan en obras de arte pict\u00f3ricas.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Efecto del \u00e1cido n\u00edtrico en la variaci\u00f3n de color de pigmentos de uso com\u00fan en obras de arte pict\u00f3ricas. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Mar\u00eda  Victoria Gomez Carretero <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Murcia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 22\/12\/2014<\/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>Francisco Jose Marzal Martinez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: agustin Mi\u00f1ana aznar <\/li>\n<li>pascual Perez ballesta (vocal)<\/li>\n<li>Rafael Font montesinos (vocal)<\/li>\n<li>montserrat Hidalgo nu\u00f1ez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mar\u00eda Victoria Gomez Carretero El objetivo fundamental de esta tesis es describir y monitorizar el efecto de 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