{"id":653,"date":"2016-02-08T18:35:01","date_gmt":"2016-02-08T17:35:01","guid":{"rendered":"http:\/\/agora.xtec.cat\/institutcanplanas\/?p=653"},"modified":"2016-11-07T17:51:47","modified_gmt":"2016-11-07T16:51:47","slug":"practiques-a-la-facultat-de-quimica-de-la-ub","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/institutcanplanas\/batxillerat\/practiques-a-la-facultat-de-quimica-de-la-ub\/","title":{"rendered":"Pr\u00e0ctiques a la Facultat de Qu\u00edmica de la UB"},"content":{"rendered":"<div class=\"news_hometext\">\n<p>Els alumnes de 1r de Batxilerat \u00a0cient\u00edfic-tecnol\u00f2gic han anat a la Facultat de Qu\u00edmica de la UB a realitzar unes pr\u00e0ctiques (21\/01\/2016).<\/p>\n<p><a href=\"https:\/\/lh3.googleusercontent.com\/-UP0hr6SzThI\/VsYLXQM_SbI\/AAAAAAAALc0\/_fqCxMe5usk\/s720-Ic42\/uabquimica1601.png\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/-T0zCB7I57AY\/VsYLVkWCdgI\/AAAAAAAALc0\/S9RdqCvdabU\/s413-Ic42\/uabquimica1601red.png\" width=\"250\" \/><\/a><\/p>\n<\/div>\n<p><!--more--><\/p>\n<p>Van fer un conjunt de<em><strong> reaccions a petita escal<\/strong><\/em>a \u00a0en tub d\u2019assaig per tal de con\u00e8ixer diferents tipus de reaccions qu\u00edmiques i adonar-se de la relaci\u00f3 existent entre una reacci\u00f3 qu\u00edmica i un fenomen perceptible, com ara l&#8217;aparici\u00f3 o la desaparici\u00f3 d&#8217;un color, l&#8217;aparici\u00f3 i aspecte d&#8217;una fase s\u00f2lida, l\u2019alliberament d\u2019un gas, etc.<\/p>\n<p>Al <em><strong>Rac\u00f3 del fred<\/strong><\/em> van experimentar amb tres subst\u00e0ncies (gel, neu carb\u00f2nica i nitrogen l\u00edquid) que s\u00f3n utilitzades habitualment per refredar, tant en el laboratori com fora d&#8217;ell (ind\u00fastries, hospitals,&#8230;). Van poder observar els canvis de fase \u00a0i els efectes de les baixes temperatures sobre les propietats d\u2019alguns materials.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/-7_ZnlabFfWM\/VsYLWxCqmOI\/AAAAAAAALc0\/qvr5T1fwxFA\/s720-Ic42\/uabquimica1602.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/-yCnHPgPFTpA\/VsYLhHbSZkI\/AAAAAAAALc0\/f6hapZKfTUw\/s720-Ic42\/uabquimica1603.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/-214RRbnPN2M\/VsYLjSvkPHI\/AAAAAAAALc0\/Kk3nVbB_4xs\/s720-Ic42\/uabquimica1604.png\" \/><\/p>\n<p>A <em><strong>Il\u2022lumina l&#8217;escena del crim<\/strong><\/em> es van endinsar a la qu\u00edmica forense, que \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 com\u00fa l\u2019an\u00e0lisi de taques de sang, fluids corporals, cabells, fibres, DNA i verins. Van identificar quatre mostres que contenen un dels seg\u00fcents compostos: alb\u00famina, hemoglobina, glucosa i lleixiu (tres d&#8217;aquests components es troben a la sang i el quart serveix per a netejar l&#8217;escena del crim).<\/p>\n<p>Van utilitzar, per una banda el luminol que d\u00f3na lloc a luminesc\u00e8ncia quan reacciona amb alguns d&#8217;aquests compostos, i d&#8217;altre banda el reactiu de Bradford, que permet identificar prote\u00efnes.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/-PJ2dXpYgRL0\/VsYLepb6rpI\/AAAAAAAALc0\/RBWkUFfBrzM\/s720-Ic42\/uabquimica1605.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/-qEY8d3nXLiY\/VsYLiYBgJtI\/AAAAAAAALc0\/hcuvFvbmq98\/s720-Ic42\/uabquimica1606.png\" \/><\/p>\n<p>Tamb\u00e9 van identificar els principis actius presents en alguns medicaments analg\u00e8sics d\u2019\u00fas habitual, mitjan\u00e7ant la <em><strong>cromatografia en capa prima<\/strong><\/em>.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/-G7SPOMkxVNs\/VsYLi0m5gAI\/AAAAAAAALc0\/Dri6wKxxhgs\/s720-Ic42\/uabquimica1607.png\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Els alumnes de 1r de Batxilerat \u00a0cient\u00edfic-tecnol\u00f2gic han anat a la Facultat de Qu\u00edmica de la UB a realitzar unes pr\u00e0ctiques (21\/01\/2016).<\/p>\n","protected":false},"author":1,"featured_media":0,"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 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