{"id":40848,"date":"2023-01-26T15:13:24","date_gmt":"2023-01-26T15:13:24","guid":{"rendered":"https:\/\/www.alquera.com\/?post_type=product&#038;p=40848"},"modified":"2024-12-28T06:51:26","modified_gmt":"2024-12-28T06:51:26","slug":"deteccion-huellas-dactilares","status":"publish","type":"product","link":"https:\/\/www.alquera.com\/fr\/deteccion-huellas-dactilares\/","title":{"rendered":"D\u00e9tection d'empreintes digitales. Oxydation de l'iodure de potassium... #Exp6"},"content":{"rendered":"<p>Le kit de d\u00e9tection d'empreintes digitales est un kit avec lequel vous disposerez des composants chimiques pour pouvoir effectuer la pratique de la d\u00e9tection d'empreintes digitales.<\/p>\n<h2>CONTENU DU KIT DE D\u00c9TECTION D'EMPREINTES DIGITALES<\/h2>\n<p>Le kit comprend<\/p>\n<ul>\n<li><span style=\"font-size: 16px;\">100g <\/span><a style=\"font-size: 16px; background-color: #ffffff;\" href=\"https:\/\/www.alquera.com\/fr\/sulfato-de-cobre\/\">Sulfate de Cuivre en Poudre<\/a><\/li>\n<li>100g <a href=\"https:\/\/www.alquera.com\/fr\/yoduro-de-potasio\/\">Iodure de Potassium<\/a><\/li>\n<li>3 <a href=\"https:\/\/www.alquera.com\/fr\/placas-de-petri\/\">Bo\u00eetes de P\u00e9tri<\/a><\/li>\n<\/ul>\n<h2>PRISE D'EMPREINTES DIGITALES \u00c9TAPE PAR \u00c9TAPE<\/h2>\n<p>Nous vous montrons les d\u00e9tails \u00e9tape par \u00e9tape en vid\u00e9o.<\/p>\n<div class=\"ast-oembed-container\" style=\"height: 100%;\"><iframe loading=\"lazy\" title=\"#Exp6 - Empreinte digitale par oxydation de l&#039;iode.\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/mQyC5msTUEQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<ol>\n<li>Prenez une demi-cuill\u00e8re d'iodure de potassium et placez-la sur la bo\u00eete de P\u00e9tri.<\/li>\n<li>Prenez la m\u00eame proportion de sulfate de cuivre et m\u00e9langez-la dans la bo\u00eete de P\u00e9tri.<\/li>\n<li>Ajoutez quelques gouttes d'eau pour favoriser le m\u00e9lange et remuez.<\/li>\n<li>Sur une feuille de papier, vous marquez vos doigts. Nous avons naturellement de la graisse sur les mains et lorsque vous marquez vos doigts sur le papier, m\u00eame si vous ne pouvez pas voir la graisse, elle sera rest\u00e9e sur le papier.<\/li>\n<li>Placez le papier face vers le bas dans la bo\u00eete de P\u00e9tri (o\u00f9 se trouvaient le sulfate de cuivre et l'iodure de potassium). Attendez 1 \u00e0 2 minutes et lorsque vous retirerez le papier, vous aurez les traces marqu\u00e9es sur le verre.<\/li>\n<\/ol>\n<h2><strong>EXPLICATION TECHNIQUE<\/strong><\/h2>\n<p>Lorsque l'iodure de potassium (KI) est m\u00e9lang\u00e9 au sulfate de cuivre (CuSO4) dans une solution aqueuse, une r\u00e9action chimique connue sous le nom de r\u00e9action d'oxydor\u00e9duction a lieu. La r\u00e9action chimique compl\u00e8te est :<\/p>\n<p>2 KI + CuSO4 \u2192 CuI + K2SO4 + I2<\/p>\n<p>Dans cette r\u00e9action, l'ion iodure (I-) agit comme un agent r\u00e9ducteur et l'ion cuivre (Cu2+) comme un agent oxydant. L'ion iodure c\u00e8de des \u00e9lectrons \u00e0 l'ion cuivre, ce qui entra\u00eene la formation d'oxyde de cuivre (CuI) et d'iode (I2). L'iode est un gaz incolore qui est lib\u00e9r\u00e9 dans la r\u00e9action et l'oxyde de cuivre est un compos\u00e9 brun.<\/p>\n<p>L'iode est un compos\u00e9 organique utilis\u00e9 comme colorant dans divers proc\u00e9d\u00e9s chimiques, notamment pour la d\u00e9tection des empreintes digitales.<\/p>\n<p>La graisse est un composant pr\u00e9sent dans les empreintes digitales, et lorsqu'une solution d'iode est appliqu\u00e9e sur la surface d'une empreinte digitale, les graisses pr\u00e9sentes dans les empreintes digitales r\u00e9agissent avec l'iode pour former un compos\u00e9 brun. Ce proc\u00e9d\u00e9 est connu sous le nom de \"coloration \u00e0 l'iode\" et est utilis\u00e9 pour mettre en \u00e9vidence les empreintes digitales sur une surface.<\/p>","protected":false},"excerpt":{"rendered":"<p>Dans cette exp\u00e9rience, vous allez utiliser une technique connue sous le nom de \"coloration \u00e0 l'iode\" pour d\u00e9tecter les empreintes digitales sur une surface. Vous pourrez voir comment r\u00e9aliser l'ensemble de l'exp\u00e9rience, ainsi qu'acheter un kit pour la r\u00e9aliser.<\/p>","protected":false},"featured_media":40851,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","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":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","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":""}}},"product_brand":[],"product_cat":[329],"product_tag":[],"class_list":{"0":"post-40848","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-experimentos-ciencias","7":"desktop-align-left","8":"tablet-align-left","9":"mobile-align-left","10":"ast-product-gallery-layout-horizontal-slider","11":"ast-product-gallery-with-no-image","12":"ast-magnify-disabled","13":"ast-product-tabs-layout-horizontal","14":"ast-qv-on-image","16":"first","17":"instock","18":"taxable","19":"shipping-taxable","20":"purchasable","21":"product-type-simple"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Detecci\u00f3n Huellas Dactilares. 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