{"id":5417,"date":"2023-11-10T12:33:55","date_gmt":"2023-11-10T11:33:55","guid":{"rendered":"https:\/\/agora.xtec.cat\/ceipelsraiers\/?p=5417"},"modified":"2023-11-10T12:51:00","modified_gmt":"2023-11-10T11:51:00","slug":"la-cromatografia-de-les-fulles-caducifolies-a-la-tardor","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ceipelsraiers\/general\/la-cromatografia-de-les-fulles-caducifolies-a-la-tardor\/","title":{"rendered":"La cromatografia de les fulles caducif\u00f2lies a la tardor"},"content":{"rendered":"<p>Els nens i nenes de tercer hem experimentat amb les fulles de tardor. Despr\u00e9s de con\u00e8ixer el bosc del Gerdar, a la l&#8217;aula ens vam centrar amb els arbres de clariana. A la sortida vam poder comprovar que s\u00f3n arbres caducifolis i a la tardor canvien els colors de les seves fulles per despr\u00e9s deixar-les caure i quedar-se sense. A la primavera, els borrons dels arbres tornen a brotar fulles noves i d&#8217;aquesta manera torna a comen\u00e7ar el cicle vital de la planta.<\/p>\n<p>Fer una cromatografia de v\u00e0ries fulles de tardor del bosc del Gerdar i d&#8217;altres boscos del Pallars Juss\u00e0 i del Sobir\u00e0 ens ha perm\u00e8s con\u00e8ixer els diferents pigments que contenen les fulles dels arbres. Una cromatografia \u00e9s una t\u00e8cnica de separaci\u00f3 dels components d&#8217;una mescla. En el nostre cas, hem mirat de separar els diferents pigments que trobem en una fulla.<\/p>\n<p>Perqu\u00e8 cauen les fulles? Per qu\u00e8 canvien de color? Amb la tardor, les hores de llum del dia s&#8217;escurcen i la intensitat de la radiaci\u00f3 solar \u00e9s menor . Tots aquests factors dificulten el proc\u00e9s de fotos\u00edntesi de manera que l&#8217;estrat\u00e8gia de moltes plantes \u00e9s deixar anar les seves fulles per no haver-les de mantenir mentre no \u00e9s possible produir aliment. El fet que canvi\u00efn de color \u00e9s a causa del fred i les poques hores de llum que degraden la clorofil\u00b7la i aquesta comen\u00e7a a descompondre&#8217;s deixant al descobert els altres pigments fotosint\u00e8tics de les fulles (carotens i xantofil\u00b7les).<\/p>\n<div id='gallery-1' class='gallery galleryid-5417 gallery-columns-3 gallery-size-thumbnail'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/agora.xtec.cat\/ceipelsraiers\/general\/la-cromatografia-de-les-fulles-caducifolies-a-la-tardor\/attachment\/whatsapp-image-2023-10-18-at-12-52-08-pm\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-content\/uploads\/usu633\/2023\/11\/WhatsApp-Image-2023-10-18-at-12.52.08-PM-e1699614221145-150x150.jpeg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-5421\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-5421'>\n\t\t\t\tMatxuquem les fulles\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/agora.xtec.cat\/ceipelsraiers\/general\/la-cromatografia-de-les-fulles-caducifolies-a-la-tardor\/attachment\/whatsapp-image-2023-10-18-at-12-52-07-pm-2\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-content\/uploads\/usu633\/2023\/11\/WhatsApp-Image-2023-10-18-at-12.52.07-PM-2-150x150.jpeg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-5419\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-5419'>\n\t\t\t\tAboquem les fulles matxucades al vas de precipitats\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/agora.xtec.cat\/ceipelsraiers\/general\/la-cromatografia-de-les-fulles-caducifolies-a-la-tardor\/attachment\/whatsapp-image-2023-10-18-at-12-52-10-pm\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-content\/uploads\/usu633\/2023\/11\/WhatsApp-Image-2023-10-18-at-12.52.10-PM-150x150.jpeg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-5420\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-5420'>\n\t\t\t\tEscurem b\u00e9!\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/agora.xtec.cat\/ceipelsraiers\/general\/la-cromatografia-de-les-fulles-caducifolies-a-la-tardor\/attachment\/whatsapp-image-2023-10-18-at-12-52-09-pm-2\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-content\/uploads\/usu633\/2023\/11\/WhatsApp-Image-2023-10-18-at-12.52.09-PM-2-150x150.jpeg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-5422\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-5422'>\n\t\t\t\tSuquem un tros de paper de filtre de caf\u00e8 a la barreja de fulla matxucada i alcohol\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>Els nens i nenes de tercer hem experimentat amb les fulles de tardor. Despr\u00e9s de con\u00e8ixer el bosc del Gerdar, a la l&#8217;aula ens vam centrar amb els arbres de clariana. A la sortida vam poder comprovar que s\u00f3n arbres caducifolis i a la tardor canvien els colors de les seves fulles per despr\u00e9s deixar-les [&hellip;]<\/p>\n","protected":false},"author":37,"featured_media":5423,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1,4,49],"tags":[],"class_list":["post-5417","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","category-portada","category-tercer-i-quart"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/posts\/5417","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/users\/37"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/comments?post=5417"}],"version-history":[{"count":1,"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/posts\/5417\/revisions"}],"predecessor-version":[{"id":5424,"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/posts\/5417\/revisions\/5424"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/media\/5423"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/media?parent=5417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/categories?post=5417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceipelsraiers\/wp-json\/wp\/v2\/tags?post=5417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}