lead additive

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• lead-free — adj. 1. not containing the element lead. [WordNet 1.5] 2. specifically: Not containing a lead additive such as tetraethyllead or tetramethyllead; of gasoline; as, Most modern cars run on lead free gasoline. Oposite of {leaded}. Syn: nonleaded,… …   The Collaborative International Dictionary of English

• Lead poisoning — Classification and external resources An X ray demonstrating the characteristic finding of lead poisoning, dense metaphyseal lines. ICD 10 T …   Wikipedia

• Lead — (pronEng|ˈlɛd) is a main group element with a symbol Pb ( la. plumbum). Lead has the atomic number 82. Lead is a soft, malleable poor metal, also considered to be one of the heavy metals. Lead has a bluish white color when freshly cut, but… …   Wikipedia

• lead processing — Introduction       preparation of the ore for use in various products.       Lead (Pb) is one of the oldest metals known, being one of seven metals used in the ancient world (the others are gold, silver, copper, iron, tin, and mercury). Its low… …   Universalium

• Additive increase/multiplicative decrease — The additive increase/multiplicative decrease (AIMD) algorithm is a feedback control algorithm used in TCP Congestion Avoidance. Basically, AIMD represents a linear growth of the congestion window, combined to an exponential reduction when a… …   Wikipedia

• lead free — Until 1973 all new vehicles used gasoline that had tetraethyl lead or some other lead compound as an additive to increase octane rating and reduce knock or detonation. In 1973, almost all new cars required lead free gasoline (unleaded gas). The… …   Dictionary of automotive terms

• lead replacement petrol — abbr. LRP Lead replacement petrol was widely introduced at the start of 1999 in response to EU legislation which prohibited the use of leaded petrol as a mainstream fuel from the end of that year. LRP has an octane rating of RON 97 and uses an… …   Petroleum refining glossary

• lead oleate — ˈled noun : a poisonous white powder or yellowish pasty mass made usually by precipitation from solutions of a lead salt and a commercial sodium oleate and used chiefly as an additive to lubricants and as the base for a medicinal plaster or a… …   Useful english dictionary

• lead soap — ˈled noun : any of various lead salts of higher carboxylic acids (as fatty acids) especially for use as a drier in paints and varnishes or as an additive to lubricants …   Useful english dictionary

• additive — noun (C) a substance, especially a chemical, that is added to something such as food, to preserve it, give it colour, improve it etc: Foods sold under this label are guaranteed free from additives. | lead additives in petrol …   Longman dictionary of contemporary English

• food additive — additive (def. 4). * * * ▪ food processing Introduction       any of various chemical substances added to foods to produce specific desirable effects. Additives such as salt, spices, and sulfites have been used since ancient times to preserve… …   Universalium