{"id":12717,"date":"2019-03-15T11:17:49","date_gmt":"2019-03-15T10:17:49","guid":{"rendered":"http:\/\/serveiseducatius.xtec.cat\/tarragones\/?p=12717"},"modified":"2019-04-26T20:21:35","modified_gmt":"2019-04-26T18:21:35","slug":"trics13_sboronat","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/tarragones\/dinamitzacio\/trics\/trics13_sboronat\/","title":{"rendered":"Els llevats tamb\u00e9 s&#8217;estressen"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-5353\" title=\"Sergi Boronat Toscano\" src=\"https:\/\/serveiseducatius.xtec.cat\/tarragones\/wp-content\/uploads\/usu549\/2019\/03\/trics13_sboronat.jpg\" alt=\"Sergi Boronat Toscano\" width=\"150\" height=\"200\" \/><strong><span style=\"color: #808080;\"><em>T\u00edtol:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/em><\/span><\/strong><strong>Els llevats tamb\u00e9 s&#8217;estressen<\/strong><br \/>\n<strong><em><span style=\"color: #808080;\">Autor\/a:\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/strong><strong> Sergi Boronat Toscano<\/strong><br \/>\n<strong><em><span style=\"color: #808080;\">Tutor\/a:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/strong>Margarida Riera Vidal<br \/>\n<strong><em><span style=\"color: #808080;\">Modalitat:\u00a0\u00a0<\/span><\/em><\/strong>Ci\u00e8ncies i tecnologia: Ci\u00e8ncies de la Salut<br \/>\n<strong><em><span style=\"color: #808080;\">\u00c0rea:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/strong>Bioqu\u00edmica<br \/>\n<strong><em><span style=\"color: #808080;\">Centre:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/strong>C Sant Pau Ap\u00f2stol<br \/>\n<strong><em><span style=\"color: #808080;\">Localitat:\u00a0\u00a0\u00a0<\/span><\/em><\/strong>Tarragona<\/p>\n<h6><strong>Objectius:<\/strong><\/h6>\n<ol>\n<li>L\u2019objectiu d\u2019aquest treball \u00e9s demostrar de manera indirecta que existeix una resposta estr\u00e8s general per part de la c\u00e8l\u00b7lula i que estar pr\u00e8viament sotmesa a un estr\u00e8s la \u201cimmunitza\u201d davant d\u2019altres diferents.<\/li>\n<\/ol>\n<h6><strong>Hip\u00f2tesi:<\/strong><\/h6>\n<p style=\"text-align: justify;\">Els llevats sotmesos a un estr\u00e8s, activen gens per a protegir-se d\u2019ell.<br \/>\nPotser aquests llevats pr\u00e8viament seleccionats seran m\u00e9s resistents que les soques salvatges davant d\u2019altres estressos.<\/p>\n<h6><strong>El proc\u00e9s:<\/strong><\/h6>\n<p style=\"text-align: justify;\">Despr\u00e9s d\u2019haver buscat la informaci\u00f3 necess\u00e0ria, es va comen\u00e7ar la part pr\u00e0ctica. Es van exposar 3 cultius de llevats a un estr\u00e8s t\u00e8rmic i, posteriorment, es van sotmetre juntament amb el cultiu inicial a diferents condicions adverses (en medis salins, \u00e0cids i b\u00e0sics)<br \/>\nMesurant la densitat \u00f2ptica (D.O.) es pot esbrinar el nombre de c\u00e8l\u00b7lules dels diferents cultius. Com m\u00e9s alta sigui la concentraci\u00f3 de c\u00e8l\u00b7lules d\u2019un cultiu, m\u00e9s resist\u00e8ncia presentar\u00e0 enfront d\u2019una situaci\u00f3 estressant.<br \/>\nComparant el nombre de c\u00e8l\u00b7lules dels cultius pr\u00e8viament estressats i el de l\u2019inicial es corroborar\u00e0 o refutar\u00e0 la hip\u00f2tesi.<\/p>\n<h6><strong>Conclusions:<\/strong><\/h6>\n<p style=\"text-align: justify;\">Els llevats pr\u00e8viament estressats s\u00f3n m\u00e9s resistents que les soques salvatges enfront situacions adverses. El cultiu que va estar exposat a l\u2019estr\u00e8s t\u00e8rmic \u00e9s aquell que m\u00e9s va cr\u00e8ixer en les diferents condicions adverses (medi \u00e0cid, b\u00e0sic i sal\u00ed) i aix\u00f2 \u00e9s perqu\u00e8 quan es va sotmetre 30 segons a pot\u00e8ncia baixa al microones, va haver de sintetitzar prote\u00efnes de resposta general conjuntament amb prote\u00efnes espec\u00edfiques contra l\u2019estr\u00e8s t\u00e8rmic per a que l\u2019ajudessin a sobreviure. De manera que, quan es va trobar en les condicions adverses de basicitat, acidesa i salinitat, continuava tenint les prote\u00efnes de resposta general que el van protegir enfront d\u2019aquests 3 estressos. En canvi, el cultiu sense tractament no tenia sintetitzades les prote\u00efnes de resposta general i, per tant, quan es va sotmetre a les condicions desfavorables d\u2019acidesa, basicitat i salinitat, la seva viabilitat va ser inferior a la del cultiu amb el tractament 2, \u00e9s a dir, els llevats adaptats (sotmesos pr\u00e8viament a un estr\u00e8s) van cr\u00e9ixer m\u00e9s que les c\u00e8l\u00b7lules control.<\/p>\n<h6><strong>Bibliografia:<\/strong><\/h6>\n<ul>\n<li>LHENINGER, Albert. <span style=\"color: #808080;\"><strong>Bioqu\u00edmica<\/strong><\/span>. Ediciones Omega S.A.<\/li>\n<li>BORRULL RIERA, Anna. <span style=\"color: #808080;\"><strong>Yeast stress responses to acclimation for sparkling wine production<\/strong><\/span>. Universitat Rovira i Virgili<\/li>\n<\/ul>\n<h6><strong>Llocs Web:<\/strong><\/h6>\n<ul>\n<li><a href=\"http:\/\/www.medigraphic.com\/pdfs\/lamicro\/mi-2004\/mi04-1_2d.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">La respuesta a estr\u00e9s en la levadura Saccharomyse cerevisiae<\/a><\/li>\n<li><a href=\"http:\/\/sgpwe.izt.uam.mx\/files\/users\/uami\/crl\/Microbiologia\/16P\/NUTRICION_MICROBIANA.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Nutrici\u00f3n microbiana<\/a><\/li>\n<li><a href=\"https:\/\/elespectrofotometro.com\/espectrofotometria\/\" target=\"_blank\" rel=\"noopener noreferrer\">Espectrofotometr\u00eda<\/a><\/li>\n<\/ul>\n<h6><strong>Presentaci\u00f3:<\/strong><\/h6>\n<p><iframe loading=\"lazy\" style=\"border: 1px solid #CCC; border-width: 1px; margin-bottom: 5px; max-width: 100%;\" src=\"\/\/www.slideshare.net\/slideshow\/embed_code\/key\/HTAcTI6zhjbVHL\" width=\"595\" height=\"485\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\"> <\/iframe><\/p>\n<h6><\/h6>\n","protected":false},"excerpt":{"rendered":"<p>Sergi Boronat Toscano<\/p>\n","protected":false},"author":1,"featured_media":12719,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"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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