/ PPM
PPM
André Balestrini
La partie par million (le ppm ), terme beaucoup utilisé en sciences (toxicologie, formulation, chimie, métallurgie, électronique, géochimie, etc. ), est la fraction valant 10– 6 , c’est-à-dire un millionième. On utilise surtout le ppm pour exprimer une fraction massique (1 ppm = 1 mg/kg ).
Vérifier aussi
Dernière modification le 27-5-2023 à 13:06:49 Où le double langage d’une municipalité pourrait – fût-ce …
{"default-settings-for-zoomsounds":{"skin_ap":"skin-wave","settings_extrahtml_in_player":"","enable_embed_button":"off","preview_on_hover":"off","loop":"off","preload_method":"metadata","cue_method":"on","playfrom":"off","default_volume":"default","menu_right_enable_info_btn":"off","menu_right_enable_multishare":"off","settings_exclude_from_list":"off","player_navigation":"default","footer_btn_playlist":"off","color_ui":"","colorhighlight":"","design_wave_color_bg":"","design_wave_color_progress":"ff0000","design_animateplaypause":"on","enable_footer_close_button":"off","disable_scrubbar":"off","disable_volume":"default","skinwave_dynamicwaves":"off","skinwave_wave_mode":"canvas","skinwave_wave_mode_canvas_reflection_size":"0.25","skinwave_wave_mode_canvas_waves_number":"","skinwave_wave_mode_canvas_waves_padding":"","skinwave_wave_mode_canvas_normalize":"","skinwave_enablespectrum":"off","skinwave_timer_static":"off","skinwave_enablereflect":"on","skinwave_comments_enable":"off","skinwave_mode":"normal","skinwave_wave_mode_canvas_mode":"normal","button_aspect":"button-aspect-noir","scrubbar_tweak_overflow_hidden":"off","extra_classes_player":"","settings_extrahtml_after_artist":"","js_settings_extrahtml_in_float_right_from_config":"","js_settings_extrahtml_in_bottom_controls_from_config":"","settings_extrahtml_after_playpause_from_config":"","settings_extrahtml_after_con_controls_from_config":"","config_extra_css":""}}
État d'urgence Ce qu'en dit la science
