{"id":96533,"date":"2018-03-11T10:16:48","date_gmt":"2018-03-11T10:16:48","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/concentracion-de-metales-pesados-en-leche-cruda-de-vaca-en-la-provincia-de-leon-espana\/"},"modified":"2018-03-11T10:16:48","modified_gmt":"2018-03-11T10:16:48","slug":"concentracion-de-metales-pesados-en-leche-cruda-de-vaca-en-la-provincia-de-leon-espana","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/produccion-animal\/concentracion-de-metales-pesados-en-leche-cruda-de-vaca-en-la-provincia-de-leon-espana\/","title":{"rendered":"Concentraci\u00f3n de metales pesados en leche cruda de vaca en la provincia de le\u00f3n, espa\u00f1a"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Abner Josue Gutierrez Chavez <\/strong><\/h2>\n<p>It had been determined toxic and essential element concentrations (mercury, arsenic, cadmium, lead, chromium, aluminium, nickel, molybdenum, zinc, iron, manganese and copper) in raw cow milk from several farms of the province of leon. It was collected between months from june to november of 2007, bulk tank milk (112 samples) and individual cow milk (65 samples) in four geographic zones. Different zones were selected to according of productive and environmental conditions of the province of leon. milk samples were kept in sterile propylene tubes and they were processed in the instrumental technical laboratory of university of leon. Trace element concentrations in milk samples were estimated using the mass spectrometry (icp-ms) and emission spectrometry (icp-aes). The statistical analyses included descriptive and normal distribution tests and one-way analysis of variance, taking in account variables as geographic zone, breed, production system, parity and lactation phase. mercury, cadmium and arsenic content in all raw milk samples were below of limit of detection. Bulk tank raw milk samples showed a mean concentration of lead (4.34 \u00c2\u00b5g\/kg), aluminium (192.16 \u00c2\u00b5g\/kg), chromium (69.28 \u00c2\u00b5g\/kg), nickel (45.11 \u00c2\u00b5g\/kg), molybdenum (45.20 \u00c2\u00b5g\/kg), zinc (4860 \u00c2\u00b5g\/kg), iron (300 \u00c2\u00b5g\/kg), manganese (31.82 \u00c2\u00b5g\/kg) and copper (63.51 \u00c2\u00b5g\/kg). Individual cow milk samples presented a mean content of lead (5.15 \u00c2\u00b5g\/kg), aluminium (257.09 \u00c2\u00b5g\/kg), chromium (85.33 \u00c2\u00b5g\/kg), nickel (62.16 \u00c2\u00b5g\/kg), molybdenum (42.42 \u00c2\u00b5g\/kg), zinc (5980 \u00c2\u00b5g\/kg), iron (670 \u00c2\u00b5g\/kg), manganese (39.92 \u00c2\u00b5g\/kg) and copper (62.09 \u00c2\u00b5g\/kg). it was registered a wide variation among metal concentrations in all milk samples, with exception of mercury, cadmium and arsenic, according to the variables previously mentioned.  from the above, we can confirmed that several heavy metal mean concentration analyzed in raw milk samples were into of data ranges described in the most of another researchs. Therefore raw cow milk from farms of the province of leon has a very low but non-zero healthy risk for human and animal consumers.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Concentraci\u00f3n de metales pesados en leche cruda de vaca en la provincia de le\u00f3n, espa\u00f1a<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Concentraci\u00f3n de metales pesados en leche cruda de vaca en la provincia de le\u00f3n, espa\u00f1a <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Abner Josue Gutierrez Chavez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Le\u00f3n<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 14\/10\/2009<\/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>Felipe Prieto Monta\u00f1a<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 Luis Benedito castellote <\/li>\n<li>roberto Robles de llano (vocal)<\/li>\n<li>arcangelo Gentile (vocal)<\/li>\n<li>bogomil Fatur (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Abner Josue Gutierrez Chavez It had been determined toxic and essential element concentrations (mercury, arsenic, cadmium, lead, [&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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