solution impure

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• Potabilisation — Production d eau potable  Cet article concerne le traitement de l eau potable. Pour le traitement de l eau industrielle, voir Purification de l eau. Le traitement nécessaire à la production d eau potable dépend fortement de la ressource. Il… …   Wikipédia en Français

• Production d'eau douce — Production d eau potable  Cet article concerne le traitement de l eau potable. Pour le traitement de l eau industrielle, voir Purification de l eau. Le traitement nécessaire à la production d eau potable dépend fortement de la ressource. Il… …   Wikipédia en Français

• Production d'eau potable — 40 % Cet article concerne le traitement de l eau potable. Pour le traitement de l eau industrielle, voir Purification de l eau. La production d eau potable correspond à l action permettant de produire de l eau potable à partir des eaux… …   Wikipédia en Français

• vinegar — Impure dilute acetic acid, made from wine, cider, malt, etc. SYN: acetum. [Fr. vinaigre, fr. vin, wine, + aigre, sour] mother of v. in v., the fungus of acetous fermentation appearing as a stringy sediment. [A.S. modder, mud] …   Medical dictionary

• rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …   Universalium

• separation and purification — ▪ chemistry Introduction       in chemistry, separation of a substance into its components and the removal of impurities. There are a large number of important applications in fields such as medicine and manufacturing. General principles… …   Universalium

• metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …   Universalium

• gold processing — Introduction  preparation of the ore for use in various products.       For thousands of years the word gold has connoted something of beauty or value. These images are derived from two properties of gold, its colour and its chemical stability.… …   Universalium

• NIDDAH — (Heb. נִדָּה menstruating woman ; literally, one who is excluded or expelled ). According to Jewish law, a man is forbidden to maintain sexual relations with his wife during and for some time both before and after (see below) her menses. Marital… …   Encyclopedia of Judaism

• Zinc — This article is about the metallic element. For other uses, see Zinc (disambiguation). copper ← zinc → gallium ↑ Zn ↓ Cd …   Wikipedia

• water — waterer, n. waterless, adj. waterlessly, adv. waterlessness, n. waterlike, adj. /waw teuhr, wot euhr/, n. 1. a transparent, odorless, tasteless liquid, a compound of hydrogen and oxygen, H2O, freezing at 32°F or 0°C and boiling at 212°F or 100°C …   Universalium