{"id":8070,"date":"2024-04-05T17:23:18","date_gmt":"2024-04-05T15:23:18","guid":{"rendered":"https:\/\/www.em-grade.com\/?p=8070"},"modified":"2024-04-09T16:39:26","modified_gmt":"2024-04-09T14:39:26","slug":"8070","status":"publish","type":"post","link":"https:\/\/www.em-grade.com\/fr\/general-fr\/8070\/","title":{"rendered":"A quelle valeur de pH ajuster son tampon dans la solution de fixation en microscopie \u00e9lectronique."},"content":{"rendered":"

Le potentiel d’hydrog\u00e8ne, not\u00e9 pH, est une mesure de l’activit\u00e9 chimique des hydrons (\u00e9galement appel\u00e9s protons ou ions hydrog\u00e8ne) en solution.<\/p>\n

En particulier, en solution aqueuse, ces ions sont pr\u00e9sents sous la forme de l’ion hydronium (le plus simple des ions oxonium).<\/p>\n

L’\u00e9quilibre acido-basique, ou hom\u00e9ostasie du pH, est une fonction du corps humain qui a pour but de r\u00e9guler le pH du plasma.<\/p>\n

Le pH plasmatique varie normalement de 7,38 \u00e0 7,42<\/strong><\/em>.\"intra<\/a><\/p>\n

On parle d’acidose en cas de diminution du pH et d’alcalose en cas d’augmentation de celui-ci.<\/p>\n

Lors du traitement\u00a0 d’\u00e9chantillon biologique pour l’examen en microscopie \u00e9lectronique , le pH des solutions de fixation doit \u00eatre proche de 7 \u00e0 7,4.<\/p>\n

vous remarquerez dans ce sch\u00e9ma les organites sont \u00e0 des pH diff\u00e9rents, c’est pour cela qu’il faut trouver une valeur de pH de compromis voisin de 7.<\/p>\n

Cliquez sur l’image pour l’agrandir<\/em><\/span><\/p>\n

 <\/p>\n

Nous montrons dans ce sch\u00e9ma les valeurs de pH\u00a0 qui sont collect\u00e9es aupr\u00e8s de diff\u00e9rentes sources et publications et sont r\u00e9f\u00e9renc\u00e9es pour les cellules eucaryotes.<\/span><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Le potentiel d’hydrog\u00e8ne, not\u00e9 pH, est une mesure de l’activit\u00e9 chimique des hydrons (\u00e9galement appel\u00e9s protons ou ions hydrog\u00e8ne) en solution. En particulier, en solution aqueuse, ces ions sont pr\u00e9sents…<\/p>\n","protected":false},"author":8,"featured_media":8064,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"itsec_x_frame_options":"","footnotes":""},"categories":[159,287],"tags":[739],"class_list":["post-8070","post","type-post","status-publish","format-standard","has-post-thumbnail","category-general-fr","category-tampons","tag-ph-fr"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/posts\/8070","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/comments?post=8070"}],"version-history":[{"count":0,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/posts\/8070\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/media\/8064"}],"wp:attachment":[{"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/media?parent=8070"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/categories?post=8070"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.em-grade.com\/fr\/wp-json\/wp\/v2\/tags?post=8070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}