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Lead interferes with metabolism of bones and teeth [188] and alters the permeability of blood vessels and collagen synthesis. [5] Lead may also be harmful to the developing immune system, causing production of excessive inflammatory proteins; this mechanism may mean that lead exposure is a risk factor for asthma in children. [188]
Lead (/ l ɛ d /) is a chemical element; it has symbol Pb (from Latin plumbum) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to ...
Led By Donkeys is a British political campaign group established in December 2018 as an anti-Brexit group, but which has also criticised other actions of the Conservative government. After the 2024 election of a Labour government , it defined itself as an "accountability project" and stated that the Labour government was also fair game.
Tarnished lead (left) and shiny lead (right) Compounds of lead exist with lead in two main oxidation states: +2 and +4. The former is more common. Inorganic lead(IV) compounds are typically strong oxidants or exist only in highly acidic solutions. [1] Red α-PbO and yellow β-PbO The mixed valence oxide Pb 3 O 4 Black PbO 2 which is a strong ...
"Lions led by donkeys" is a phrase used to imply a capable group of individuals are incompetently led. Coined in classical antiquity , the phrase was commonly used after World War I to contrast senior commanders who had led armies, most prominently those of the British Armed Forces , with the men they commanded.
Lead (82 Pb) has four observationally stable isotopes: 204 Pb, 206 Pb, 207 Pb, 208 Pb. Lead-204 is entirely a primordial nuclide and is not a radiogenic nuclide.The three isotopes lead-206, lead-207, and lead-208 represent the ends of three decay chains: the uranium series (or radium series), the actinium series, and the thorium series, respectively; a fourth decay chain, the neptunium series ...
CLEAR, the Campaign for Lead Free Air, was started in 1981 when a wealthy property developer, Godfrey Bradman, recruited the veteran campaigner and former Director of Shelter, Des Wilson to get lead-free petrol into the United Kingdom. [1] Wilson ran the public campaign and co-opted Dr Robin Russell-Jones as the unpaid medical and scientific ...
Lead (sea ice), a temporary stretch of open water in pack ice; Lead compound, a chemical compound in drug discovery (not necessarily with lead the metal) Pencil lead, the graphite ("lead"), the writing core of a pencil; Sounding lead or sounding line, a line used to measure water depth; Tetraethyllead or lead, a gasoline additive