{"id":6071,"date":"2018-05-21T20:55:12","date_gmt":"2018-05-21T18:55:12","guid":{"rendered":"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/?p=6071"},"modified":"2018-05-21T20:55:12","modified_gmt":"2018-05-21T18:55:12","slug":"practiques-a-la-facultat-de-geologia","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/modul-b\/practiques-a-la-facultat-de-geologia\/","title":{"rendered":"Pr\u00e0ctiques a la facultat de Geologia"},"content":{"rendered":"<p><a href=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/Imagen-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6072 aligncenter\" src=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/Imagen-1.png\" alt=\"\" width=\"431\" height=\"173\" srcset=\"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/Imagen-1.png 431w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/Imagen-1-300x120.png 300w\" sizes=\"auto, (max-width: 431px) 100vw, 431px\" \/><\/a><\/p>\n<p>A les pr\u00e0ctiques a l\u2019empresa duc a terme diferents tasques, una d\u2019elles \u00e9s analitzar solucions al comptador Coulter LS 230.\u00a0Aquesta tasca comen\u00e7a quan s\u2019obre un testimoni mar\u00ed, que \u00e9s un cilindre que s\u2019ha dipositat al fons mar\u00ed, i del qual s\u2019extreuen les mostres un cop s\u2019ha partit per la meitat.<\/p>\n<p>&nbsp;<\/p>\n<p>Quan les mostres arriben al laboratori dintre de bosses de zip, nosaltres ens encarreguem de fer el tractament previ per poder fer un recompte de les part\u00edcules al comptador Coulter. Aquest tractament consta inicialment de pesar a la balan\u00e7a granataria entre 0,2 i 0,3 g de mostra, \u00a0ho dipositem a un got de precipitats i aboquem aproximadament 50mL d\u2019 H<sub>2<\/sub>O<sub>2 <\/sub>al 10%. \u00a0Deixem a l\u2019estufa a 80<sup>o<\/sup>C durant 24h, passat aquest temps afegim 50mL m\u00e9s d\u2019 H<sub>2<\/sub>O<sub>2 <\/sub>al 10% i ho tornem a deixar a l\u2019estufa.<\/p>\n<p><!--more--><\/p>\n<p>Despr\u00e9s la mostra s\u00f2lida que ha quedat al got de precipitats li posem aigua destil\u00b7lada per despagar-la i la posem dintre d\u2019un pot de coulter i afegim una petita quantitat (a ull) de soluci\u00f3 disgregant (polifosfat de sodi).<\/p>\n<p>Aquests pots amb la mostra els portem a una s\u00ednia on pegaran voltes fins ser analitzats.<br \/>\nUn cop agafem el pot l\u2019aboquem dintre la boca que t\u00e9 el coulter i donem a analitzar, quan s\u2019ha analitzat la mostra obtindrem a l\u2019ordinador, que est\u00e0 connectat, un gr\u00e0fic que ens relaciona la mida de la part\u00edcula amb la quantitat que hi ha.<\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/Captura-de-pantalla-2018-05-19-a-les-11.41.07.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-6073 aligncenter\" src=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/Captura-de-pantalla-2018-05-19-a-les-11.41.07.png\" alt=\"\" width=\"318\" height=\"251\" srcset=\"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/Captura-de-pantalla-2018-05-19-a-les-11.41.07.png 371w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/Captura-de-pantalla-2018-05-19-a-les-11.41.07-300x237.png 300w\" sizes=\"auto, (max-width: 318px) 100vw, 318px\" \/><\/a><\/p>\n<p>Les part\u00edcules, que s\u00f3n molt poc conductores, alteren la secci\u00f3 conductora del microcanal, cosa que provoca que la resist\u00e8ncia entre els extrems del microcanal augmenti i per tant que el corrent el\u00e8ctric que travessa el canal disminueixi per un breu per\u00edode de temps.<\/p>\n<p>En portar un registre dels polsos que ocorren en el corrent el\u00e8ctric, es pot comptar el nombre de part\u00edcules presents en un determinat volum de fluid. L&#8217;amplitud del canvi en el corrent que travessa el microcanal es troba directament relacionat al volum de la part\u00edcula, aix\u00ed podem mesurar la distribuci\u00f3 de la mida de les part\u00edcules comptades.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-6074\" src=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter2-1024x768.jpg\" alt=\"\" width=\"377\" height=\"283\" srcset=\"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter2-1024x768.jpg 1024w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter2-300x225.jpg 300w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter2-768x576.jpg 768w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter2-200x150.jpg 200w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter2.jpg 2048w\" sizes=\"auto, (max-width: 377px) 100vw, 377px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-6075\" src=\"http:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter-1024x768.jpg\" alt=\"\" width=\"379\" height=\"284\" srcset=\"https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter-1024x768.jpg 1024w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter-300x225.jpg 300w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter-768x576.jpg 768w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter-200x150.jpg 200w, https:\/\/agora.xtec.cat\/ies-merce-rodoreda\/wp-content\/uploads\/usu644\/2018\/05\/coulter.jpg 2048w\" sizes=\"auto, (max-width: 379px) 100vw, 379px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A les pr\u00e0ctiques a l\u2019empresa duc a terme diferents tasques, una d\u2019elles \u00e9s analitzar solucions al comptador Coulter LS 230.\u00a0Aquesta [&hellip;]<\/p>\n","protected":false},"author":228,"featured_media":0,"comment_status":"closed","ping_status":"closed","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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