{"id":155220,"date":"2026-01-12T17:17:58","date_gmt":"2026-01-12T17:17:58","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/bacillus-psicrotrofos-en-leche-cruda\/"},"modified":"2026-01-12T17:17:58","modified_gmt":"2026-01-12T17:17:58","slug":"bacillus-psicrotrofos-en-leche-cruda","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/bacillus-psicrotrofos-en-leche-cruda\/","title":{"rendered":"Bacillus psicrotrofos en leche cruda"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Manuela Caballero Armenta <\/strong><\/h2>\n<p>Se ha realizado el estudio de un grupo de microorganismos relacionados con la leche en funcion de sus peculiares caracteristicas. Se trata de los termorresistentes asicrotrofos, germenes que soportan la pasteurizacion y son capaces de crecer a baja temperatura, presentando ademas el inconveniente de producir enzimas (lipasas y proteasas) termorresistentes que causan importantes alteraciones organolepticas en leche.  en espa\u00f1a no existe ningun trabajo publicado al respecto en la bibliografia consultada a partir de 1975 por lo cual hemos considerado interesante efectuar uno en la linea que siguen investigadores de otros paises.  para ello se eligieron cuatro explotaciones ganaderas (dos de orde\u00f1o manual y dos de orde\u00f1o mecanico) y se tomaron muestras a lo largo de un a\u00f1o procedentes de la leche de mezcla, utensilios empleados, ganado, ambiente de los establos y pasto.  se realizaron recuentos de germenes totales aerobios mesofilos, germenes termorresistentes aerobios y germenes termorresistentes aerobios asicrotrofos, observandose una variacion estacional.  igualmente se procedio a la identificacion de 624 cepas de bacterias pertenecientes al genero bacillus. Que resultaron incluidas a las especies que se citan y en los porcentajes indicados:  b. Bsevis 16,5% b.  macerenus 6,6% b. Cereus 5,7% b. Negaterium 9,6% b. Circulaus 6,1% b. Polynyxa 6,4% b. Firmus 8,3% b. Pulvifacieus 18,3% b. Lentus 4,5% b. Pumilus 5% b. Licheniformus 11,3% b.  sustilis 11,5%<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Bacillus psicrotrofos en leche cruda<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Bacillus psicrotrofos en leche cruda <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Manuela Caballero Armenta <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1991<\/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> Arroyo Merino Jos\u00e9 Antonio<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 Mart\u00ednez Peinado <\/li>\n<li>Manuel N\u00fa\u00f1ez  Guti\u00e9rrez (vocal)<\/li>\n<li>Margarita Flores Rodriguez (vocal)<\/li>\n<li>Pilar Caceres Arribas (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Manuela Caballero Armenta Se ha realizado el estudio de un grupo de microorganismos relacionados con la leche [&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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