what is lead
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Occupational Safety and Health Administration Lead is an important metal for many types of businesses and industrial processes. Lead is most often used in the manufacturing sector (e.g., manufacturing products containing lead) but worker exposure can also occur in other industry sectors including construction and wholesale trade.
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Chlamydia trachomatis infection: host immune responses and potential vaccines Lead is one of the few natural substances that has no known use in the human body. At even very low levels, lead has been shown to cause health problems. The difficulty with lead is that once it is mined from the earth, there is no known way to destroy or make it harmless.
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About Us Founded in 1899, The Gideons International serves as an extended missionary arm of the church and is the oldest Association of Christian business and professional men in the United States of America.
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Lead Lead is a naturally occurring metal found deep within the ground. It occurs in small amounts in ore, along with other elements such as silver, zinc or copper. Even though it's found in small amounts, there is an abundant supply of lead throughout the earth.
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Overview Lead poisoning. Overview. Lead poisoning occurs when lead builds up in the body, often over months or years. Even small amounts of lead can cause serious health problems. Children younger than 6 years are especially vulnerable to lead poisoning, which can severely affect mental and physical development. At very high levels, lead poisoning can be fatal. Lead-based paint and lead-contaminated dust in older buildings are the most common sources of lead poisoning in children. Other sources include contaminated air, water and soil. Adults who work with batteries, do home renovations or work in auto repair shops also might be exposed to lead.
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Home Environmental Health Risks Lead is a heavy metal that was used in many consumer products, such as gasoline and interior and exterior paint, before it was gradually phased out in the late 1970s and 1980s. Despite discontinued use, lead is persistent in the environment and continues to pose a risk to health.
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lead In its metallic form, lead is used as a protective shielding against x-rays. Lead is poisonous, a characteristic that has led to a reduction in the use of lead compounds as pigments for paints and inks.In dentistry, lead acts as a protective shield against the radiographic beam and is found in the lead apron and walls of the surrounding operatory.) It is poisonous, a characteristic that has led to a reduction in the use of lead compound as pigments for paints and inks. lead apron, n See apron, lead.
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lead and led - the difference The past tense of the verb to lead is led. Confusion arises because lead (a soft toxic metal) is pronounced led. There is often confusion over the words lead (rhymes with bead) and led. Lead can be an adjective,noun, or verb: Lead that rhymes with bead is associated with being in charge or being in front.
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Lead Lead. Lead is a soft, heavy, dull gray metal with low tensile strength. It is used in making type, for covering electrical cables, and in many alloys. The organic lead compound tetraethyl lead, Pb(C 2 H 5) 4, was widely used as a gasoline additive to prevent knock in automobile until concern about lead toxicity caused that use to be discontinued.
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A Lead. 1  Lead (leg): The leading legs of the horse at the canter and Gallop. The front and hind legs on one side of the horse appear to land in front of the other set of front and hind legs when the horse travels. 2  Lead (tack): A lead rope, lead shank or leading rein.
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Blood Lead Levels High in 535,000 Kids in the USA Why Lead is So Dangerous for Children. Lead is a naturally occurring metal that was once commonly used in gasoline, paint and children's toys, and is still a part of batteries, pipes, pottery, roofing materials and cosmetics. Lead is known to cause damage to your brain and nervous system.
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Leading In typography, leading /ˈlɛdɪŋ/ refers to the distance between the baselines of successive lines of type. The term originated in the days of hand-typesetting, when thin strips of lead were inserted into the forms to increase the vertical distance between lines of type. The term is still used in modern page layout software such as QuarkXPress and Adobe InDesign.
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Lead (electronics) Lead frame of a SMD package. Most kinds of integrated circuit packaging are made by placing the silicon chip on a lead frame, wire bonding the chip to the metal leads of that lead frame, and covering the chip with plastic.he lead wire is a coated copper wire, a tinned copper wire or another electrically conductive wire used to connect two locations electrically. In electronics, a lead is an electrical connection consisting of a length of wire or metal pad (SMD) that comes from a device.
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Facts about lead and its human effects Facts about lead and its human effects. Lead is a useful and common metal that has been used by humans for thousands of years. It is also a very dangerous poison, particularly for children, when it is accidentally inhaled or ingested.
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Definitions &Translations Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Lead(noun) one of the elements, a heavy, pliable, inelastic metal, having a bright, bluish color, but easily tarnished. 2  Lead(noun) an article made of lead or an alloy of lead. 3  Lead(noun) a plummet or mass of lead, used in sounding at sea.
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Occupational Safety and Health Administration Lead enters the body primarily through inhalation and ingestion. Today, adults are mainly exposed to lead by breathing in lead-containing dust and fumes at work, or from hobbies that involve lead. Lead passes through the lungs into the blood where it can harm many of the body's organ systems.
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Blood lead level Blood lead level, is a measure of the amount of lead in the blood. Lead is a toxic heavy metal and can cause neurological damage, especially among children, at any detectable level. High lead levels cause decreased vitamin D and haemoglobin synthesis as well as anemia, acute central nervous system disorders, and possibly death. Pre-industrial human BLL measurements are estimated to have been 0.016 µg/dL, and this level increased markedly in the aftermath of the industrial revolution. At the end
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- Lead is toxic to humans, and poisoning can occur either through ingestion of lead or by breathing in lead dust. Both long-term low-dose and short-term high-dose exposure can permanently damage the nervous, renal (kidney), and hematopoietic (blood-forming) systems.
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It's Elemental Lead is a soft, malleable and corrosion resistant material. The ancient Romans used lead to make water pipes, some of which are still in use today. Unfortunately for the ancient Romans, lead is a cumulative poison and the decline of the Roman empire has been blamed, in part, on lead in the water supply.
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- A lead is simply a wire used to connect two parts electrically. The method of clipping the lead to the component (part) determines its name. An alligator clip test lead uses a small metal clothespin for connecting, while a mini-hook clip lead is like a small, spring-loaded crochet hook.
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List of California state symbols List of California state symbols. Location of the state of California in the United States of America. This is a list of the officially designated symbols of the U.S. state of California. Most such designations are found in sections 420-429.8 of the California Government Code.
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- Lead is a bright and silvery metal with a very slight shade of blue in a dry atmosphere. On contact with air, it begins to tarnish by forming a complex mixture of compounds depending on the conditions. The color of the compounds can vary.ead-205 is the most stable radioisotope of lead, with a half-life of over 10 7 years. 47 nuclear isomers (long-lived excited nuclear states), corresponding to 24 lead isotopes, have been characterized. The most long-lived isomer is lead-204m2 (half-life of about 1.1 hours).
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- Most lead ends up in the bone, where it causes even more problems. Lead can interfere with the production of blood cells and the absorption of calcium that bones need to grow healthy and strong. Calcium is essential for strong bones and teeth, muscle contraction, and nerve and blood vessel function.
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Hypertension/high blood pressure guide High blood pressure and heart disease. Hypertensive heart disease is the number one cause of death associated with high blood pressure. It is actually a group of disorders that include heart failure, ischaemic heart disease and left ventricular hypertrophy (excessive thickening of the heart muscle).
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About Lead-Based Paint About Lead-Based Paint. Lead is a highly toxic metal that may cause a range of health problems, especially in young children. When lead is absorbed into the body, it can cause damage to the brain and other vital organs, like the kidneys, nerves and blood. Lead may also cause behavioral problems, learning disabilities, seizures and in extreme cases, death.
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- Lead is a bright and silvery metal with a very slight shade of blue in a dry atmosphere. On contact with air, it begins to tarnish by forming a complex mixture of compounds depending on the conditions. The color of the compounds can vary.