{"id":3247,"date":"2017-01-22T13:07:31","date_gmt":"2017-01-22T12:07:31","guid":{"rendered":"http:\/\/agora.xtec.cat\/ieslasedeta\/?p=3247"},"modified":"2017-06-27T07:42:31","modified_gmt":"2017-06-27T05:42:31","slug":"fem-quimica-als-laboratoris-de-la-universitat","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ieslasedeta\/2016-2017\/fem-quimica-als-laboratoris-de-la-universitat\/","title":{"rendered":"Fem qu\u00edmica als laboratoris de la universitat"},"content":{"rendered":"<p>El divendres 20 de gener des de l&#8217;<strong>\u00c0rea de Qu\u00edmica<\/strong> de l&#8217;<em>\u00c0mbit de Ci\u00e8ncies i Tecnologia<\/em> s&#8217;organitz\u00e0 la\u00a0sortida-taller &#8220;<strong>Fem qu\u00edmica al laboratori&#8221;<\/strong> per a l&#8217;alumnat d&#8217;aquesta mat\u00e8ria de modalitat de <strong>2n de Batxillerat.<\/strong><\/p>\n<p>L&#8217;activitat promoguda per la <strong>Facultat de Qu\u00edmica de la UB [Universitat de Barcelona]<\/strong>\u00a0t\u00e9 com a principal objectiu establir una nova via per facilitar el contacte, el millor coneixement i l&#8217;enriquiment com\u00fa entre la universitat\u00a0i els centres de secund\u00e0ria i Batxillerat de la ciutat.\u00a0Amb aquesta activitat es\u00a0vol contribuir a complementar la formaci\u00f3 de l&#8217;alumnat, tot posant al seu abast, a m\u00e9s de tota la il\u00b7lusi\u00f3 del professorat universitari, alguns dels recursos amb qu\u00e8\u00a0compta aquesta instituci\u00f3 acad\u00e8mica de primer nivell.<\/p>\n<p>La proposta formativa constava de diverses experi\u00e8ncies i pr\u00e0ctiques, les quals es detallen a continuaci\u00f3.\u00a0En primer lloc, per\u00f2, es\u00a0va fer\u00a0una breu introducci\u00f3 de les normes de seguretat de\u00a0l&#8217;equipament. Un cop feta aquesta introducci\u00f3, els alumnes, tutelats per professors de la facultat (uns deu estudiants per professor), passaren\u00a0a realitzar personalment quatre pr\u00e0ctiques:<\/p>\n<ul>\n<li><strong><span style=\"font-family: inherit; font-size: 1em; line-height: 1.6; color: #ffffff; background-color: #800000;\">EL RAC\u00d3 DEL FRED<\/span><\/strong><\/li>\n<\/ul>\n<p>S&#8217;experiment\u00e0 amb tres subst\u00e0ncies (gel, neu carb\u00f2nica i nitrogen l\u00edquid) que s\u00f3n utilitzades habitualment per refredar, tant al laboratori com fora d&#8217;aquest tipus d&#8217;instal\u00b7lacions (ind\u00fastries, hospitals, etc.). En aquesta pr\u00e0ctica van poder\u00a0observar els canvis de fase (s\u00f2lid-l\u00edquid, s\u00f2lid-gas, l\u00edquid-gas) dels sistemes i els efectes de les baixes temperatures sobre les propietats d\u2019alguns materials.<\/p>\n<ul>\n<li><span style=\"color: #ffffff; background-color: #800000;\"><strong>IDENTIFIQUEM ANALG\u00c8SICS<\/strong><\/span><\/li>\n<\/ul>\n<p>Despr\u00e9s de comentar\u00a0la utilitat dels analg\u00e8sics i el seu paper com a principis actius en els productes farmac\u00e8utics se&#8217;ls van explicar els fonaments de les t\u00e8cniques cromatogr\u00e0fiques.<br \/>\nTot\u00a0seguit, van ser convidats\u00a0a qu\u00e8 identifiquessin els principis actius presents en alguns medicaments analg\u00e8sics d\u2019\u00fas habitual, mitjan\u00e7ant la cromatografia en capa prima.<\/p>\n<ul>\n<li><span style=\"color: #ffffff; background-color: #800000;\">I<strong>L\u00b7LUMINA L&#8217;ESCENA DEL CRIM<\/strong><\/span><\/li>\n<\/ul>\n<p>L&#8217;objectiu d&#8217;aquesta pr\u00e0ctica era\u00a0identificar quatre mostres que contenien un dels seg\u00fcents compostos: <em>alb\u00famina, hemoglobina, glucosa i lleixiu<\/em>. Tres d&#8217;aquests components es troben a la sang i el quart serveix per netejar l&#8217;escena del crim. Es va utilitzar, per una banda el <em>luminol<\/em> que dona lloc a luminesc\u00e8ncia quan reacciona amb alguns d&#8217;aquests compostos, i d&#8217;altra banda el reactiu de Bradford, que permet identificar prote\u00efnes.<\/p>\n<p>Com darrerament s&#8217;ha pogut veure en famoses s\u00e8ries de TV, la\u00a0qu\u00edmica forense \u00e9s una branca de la qu\u00edmica que analitza, classifica i determina la naturalesa dels elements i subst\u00e0ncies relacionats amb els fets delictius. En qu\u00edmica forense \u00e9s comuna l\u2019an\u00e0lisi de taques de sang, fluids corporals, cabells, fibres, DNA i verins i petits experiments com l&#8217;esmentat s\u00f3n habituals.<\/p>\n<ul>\n<li><span style=\"color: #ffffff; background-color: #800000;\"><strong>M\u00c9S CLAR QUE L&#8217;AIGUA<\/strong><\/span><\/li>\n<\/ul>\n<p>L&#8217;objectiu d&#8217;aquesta darrera pr\u00e0ctica de laboratori era fer un estudi sobre les caracter\u00edstiques de diferents tipus d\u2019aig\u00fces naturals: pH, conductivitat, pres\u00e8ncia de ferro (III) i comportament amb el sab\u00f3. Aquest estudi ha perm\u00e8s els estudiant identificar quin tipus d\u2019aigua cont\u00e9 un recipient amb un aigua desconeguda. A m\u00e9s, s&#8217;ha introdu\u00eft l\u2019alumnat en el proc\u00e9s de potabilitzaci\u00f3 de l\u2019aigua, mitjan\u00e7ant alguns experiments simples de laboratori, com ara l\u2019efecte de cations amb c\u00e0rrega alta en el proc\u00e9s de coagulaci\u00f3, o la l\u2019efici\u00e8ncia d\u2019un filtre de carb\u00f3 actiu.<\/p>\n<p>Acabada aquesta intensa jornada, cal dir que els i les alumnes van aprofitar molt aquestes pr\u00e0ctiques i van sortir molt contents amb el seu certificat d&#8217;assist\u00e8ncia em\u00e8s per la UB, aix\u00ed com el professorat que organitz\u00e0 l&#8217;activitat i els acompany\u00e0: Josep M. Gonz\u00e0lez i Joana Mart\u00ednez.<\/p>\n\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>El divendres 20 de gener des de l&#8217;\u00c0rea de Qu\u00edmica de l&#8217;\u00c0mbit de Ci\u00e8ncies i Tecnologia s&#8217;organitz\u00e0 la\u00a0sortida-taller &#8220;Fem qu\u00edmica al laboratori&#8221; per a l&#8217;alumnat d&#8217;aquesta mat\u00e8ria de modalitat de 2n de Batxillerat. L&#8217;activitat promoguda per la Facultat de Qu\u00edmica de la UB [Universitat de Barcelona]\u00a0t\u00e9 com a principal objectiu establir una nova via per [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3251,"comment_status":"open","ping_status":"open","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":[152],"tags":[],"class_list":["post-3247","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-2016-2017"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/posts\/3247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/comments?post=3247"}],"version-history":[{"count":3,"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/posts\/3247\/revisions"}],"predecessor-version":[{"id":3252,"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/posts\/3247\/revisions\/3252"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/media\/3251"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/media?parent=3247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/categories?post=3247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ieslasedeta\/wp-json\/wp\/v2\/tags?post=3247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}