{"id":33089,"date":"1997-10-10T00:00:00","date_gmt":"1997-10-10T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/a-mechanical-study-of-the-long-bones-of-birds\/"},"modified":"1997-10-10T00:00:00","modified_gmt":"1997-10-10T00:00:00","slug":"a-mechanical-study-of-the-long-bones-of-birds","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/a-mechanical-study-of-the-long-bones-of-birds\/","title":{"rendered":"A mechanical study of the long bones of birds."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Jorge Cubo Garc\u00eda <\/strong><\/h2>\n<p>Esta tesis constituye una investigaci\u00f3n extensiva sobre la variaci\u00f3n de par\u00e1metros con significado mec\u00e1nico en los huesos largos de las aves. Se cuantificaron la rigidez y la carga m\u00e1xima mediante experimentos de flexi\u00f3n por tres puntos. Por otra parte, se analiz\u00f3 la variaci\u00f3n del m\u00e1ximo segundo momento del \u00e1rea, el momento polar y el \u00e1rea de hueso cortical. A partir de los datos mec\u00e1nicos y geom\u00e9tricos se calcularon el m\u00f3dulo de young y la resistencia m\u00e1xima. Asimismo, se analizaron la masa seca de los elementos esquel\u00e9ticos, la forma de la secci\u00f3n transversal de los huesos y el espesor de hueso cortical. Para una masa corporal determinada, los huesos largos de las aves tienen m\u00e1s masa seca que los correspondientes huesos de mam\u00edferos, con la excepci\u00f3n del f\u00e9mur. Por otra parte, los huesos neumatizados presentaron espesores de hueso cortical significativamente menores que los huesos medulados, siendo la resistencia m\u00e1xima y el m\u00f3dulo de young significativamente mayores en los huesos con m\u00e9dula que en los huesos neumatizados. La incidencia de neumatizaci\u00f3n fue del 70% en el caso del h\u00famero y del 39% en el caso del f\u00e9mur, no estando neumatizados los huesos distales en ning\u00fan caso. Finalmente, tanto la resistencia m\u00e1xima como el m\u00f3dulo de young estuvieron correlacionados con el contenido en n, siendo las pendientes de las regresiones negativas en ambos casos.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>A mechanical study of the long bones of birds.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 A mechanical study of the long bones of birds. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Jorge Cubo Garc\u00eda <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 10\/10\/1997<\/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>Adri\u00e1n Casinos Pardos<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: jacinto Nadal puigdefabregas <\/li>\n<li>josep antoni Planell estany (vocal)<\/li>\n<li>valent\u00edn Sans coma (vocal)<\/li>\n<li>Francisco Javier Gil mur (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Jorge Cubo Garc\u00eda Esta tesis constituye una investigaci\u00f3n extensiva sobre la variaci\u00f3n de par\u00e1metros con significado mec\u00e1nico [&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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