to conduct or escort: lead them out; a heavy bluish-gray metal Not to be confused with: led – past tense of lead: He led them along the path. Arsenic, tin, antimony, silver, gold, copper, and bismuth are common impurities in lead minerals. Once electrical potential is applied, impure lead at the anode dissolves and plates onto the cathode, leaving the majority of the impurities in solution. [152][153] The largest production of lead occurred in South and East Asia, especially China and India, where lead mining grew rapidly. [129] Lead was used to make sling bullets from the 5th century BC. Learn more. Only about a third of lead is excreted by a child. Quotes. deduce. [266], Inhalation is the second major exposure pathway, affecting smokers and especially workers in lead-related occupations. Find more words! Usage: He led me to his room. Who is Lead? [74], Some lead compounds exist in formal oxidation states other than +4 or +2. Hana means: Bliss felicity. This depends on their location (face, hand or neck etc.). Zinc. Continual exposure may result in the bioaccumulation of lead. PVC: In the blend composition of the polymer, PVC forms a major portion, which is approximately 80-85% Unlike the other polymer, PVC is a heat-sensitive component and requires some additives so it can be processed. Source(s): Soc. By mimicking calcium, lead can cross the blood–brain barrier. Learn more. Lead tetrachloride (a yellow oil) decomposes at room temperature, lead tetrabromide is less stable still, and the existence of lead tetraiodide is questionable. [145] Its status in Roman society was low as it was readily available[146] and cheap. [224], Lead is used in high voltage power cables as sheathing material to prevent water diffusion into insulation; this use is decreasing as lead is being phased out. The version of record as reviewed is: Mikhail Boldyrev; et al. [109] Most other lead minerals are related to galena in some way; boulangerite, Pb5Sb4S11, is a mixed sulfide derived from galena; anglesite, PbSO4, is a product of galena oxidation; and cerussite or white lead ore, PbCO3, is a decomposition product of galena. [288] White lead paint has been withdrawn from sale in industrialized countries, but specialized uses of other pigments such as yellow lead chromate remain. These are among the most potent sources of lead contamination along with lead production sites. On capturing another neutron, lead-208 becomes lead-209, which quickly decays into bismuth-209. [193], Alternatively to the pyrometallurgical processes, very pure lead can be obtained by processing smelted lead electrolytically using the Betts process. This metal was by far the most used material in classical antiquity, and it is appropriate to refer to the (Roman) Lead Age. Need to translate "lead metal" to Norwegian? Glossary. lead meaning: 1. to control a group of people, a country, or a situation: 2. धातुओं के नाम हिंदी में पढ़ें. Learn more. [87], Lead's per-particle abundance in the Solar System is 0.121 ppb (parts per billion). Definition of lead 2 noun from the Oxford Advanced Learner's Dictionary. [71] Analogously to lead monoxide, lead dioxide is capable of forming plumbate anions. [250] Among the essential metals that lead interacts with are calcium, iron, and zinc. Malleability describes how easily it deforms under compression, whereas ductility means its ability to stretch. [182], As of 2014, production of lead is increasing worldwide due to its use in lead–acid batteries. [86] Other organolead compounds are less chemically stable. 1999, Gill & Libraries Board of South Australia 1974, Centers for Disease Control and Prevention 1997, United States Environmental Protection Agency 2010, California Department of Fish and Wildlife, National Council on Radiation Protection and Measurements 2004, United States Food and Drug Administration 2015, National Institute for Occupational Safety and Health, Occupational Safety and Health Administration, Agency for Toxic Substances and Disease Registry, Centers for Disease Control and Prevention 2015, United Nations Environment Programme 2010, Deltares & Netherlands Organisation for Applied Scientific Research 2016, Agency for Toxic Substances and Disease Registry 2017, United States Environmental Protection Agency 2000, United States Environmental Protection Agency 2005, "Lead: properties, history, and applications", "Information for the Community: Lead Toxicity", "Lead Toxicity. Passivate definition: to render (a metal) less susceptible to corrosion by coating the surface with a... | Meaning, pronunciation, translations and examples divi definition: a dividend: . Lead meaning in Hindi Lead is a english word. Inorganic lead is a malleable, blue-gray, heavy metal that occurs naturally in the Earth’s crust. Meaning of Mechanization of Agriculture: In G. D. Aggarwal’s words, “Farm mechanization is a term used in a very broad’ sense. In the United States, environmental regulations reduced or eliminated the use of lead in non-battery products, including gasoline, paints, solders, and water systems. [149] In countries such as Turkey and India, the originally Persian name surma came to refer to either antimony sulfide or lead sulfide,[150] and in some languages, such as Russian, gave its name to antimony (сурьма). The earliest record dates to 1621 in the English Colony of Virginia, fourteen years after its foundation. ISSN 2470-6345. [161][162] This practice later expanded to white wigs and eyeliners, and only faded out with the French Revolution in the late 18th century. In low concentrations, as well as acting as a lubricant, the globules hinder the formation of swarf as the alloy is worked, thereby improving machinability. Small blood pressure increases, particularly in middle-aged and older people, may be apparent and can cause anemia. Check out the following synonyms for the same word which are very close in meaning. Non-lead solder and metals used in solder other than lead (antimony, tin). ( may take a clause as object) to reach (a conclusion about something) by reasoning; conclude (that); infer. Here we have listed a long 3073 Marathi Baby Girl Names, with their meanings, to choose from. [258], Lead exposure is a global issue since lead mining and smelting, and battery manufacturing/disposal/recycling, are common in many countries. The name should be be selected after going through a lost list of names. Hana is Girl/Female and origin is Muslim/Islamic. [113], There is no consensus on the origin of the Proto-Germanic *lauda-. [207], Lead has many uses in the construction industry; lead sheets are used as architectural metals in roofing material, cladding, flashing, gutters and gutter joints, and on roof parapets. lead = प्रभावित करना[होना] Dictionary. Lead. [101] It tends to stop once neutron-rich nuclei reach 126 neutrons. [125], Rome's territorial expansion in Europe and across the Mediterranean, and its development of mining, led to it becoming the greatest producer of lead during the classical era, with an estimated annual output peaking at 80,000 tonnes. context information. Diamond cubic structures with lattice parameters around the lattice parameter of silicon exists both in thin lead and tin films, and in massive lead and tin, freshly solidified in vacuum of ~5 x 10. "Lead sling bullet; almond shape; a winged thunderbolt on one side and on the other, in high relief, the inscription DEXAI "Catch! [277] Lead was banned for shot and sinkers in the United States in 2017,[278] although that ban was only effective for a month,[279] and a similar ban is being considered in the European Union. Wikidata Q56050531. Jacketed lead: Bullets intended for even higher-velocity applications generally have a lead core that is jacketed or plated with gilding metal, cupronickel, copper alloys, or steel; a thin layer of harder metal protects the softer lead core when the bullet is passing through the barrel and during flight, which allows delivering the bullet intact to the target. [196], In this process, lead bullion and slag is obtained directly from lead concentrates. Marathi is an Indo-European language having over 70 million native speakers people in (predominantly) Maharashtra India. Federal Gov't Order Bans Sinkers, Ammo", "Atomic weights of the elements 2013 (IUPAC Technical Report)", "Next-generation ice core technology reveals true minimum natural levels of lead (Pb) in the atmosphere: Insights from the Black Death", "Gender and hierarchical differences in lead-contaminated Japanese bone from the Edo period", National Council on Radiation Protection and Measurements, "NIOSH Pocket Guide to Chemical Hazards — Lead", "Lead Exposure and Cardiovascular Disease—A Systematic Review", "Substance data sheet for occupational exposure to lead", "East Penn and Ecoult battery installation case study webinar", "Bacterial-assisted immobilization of lead in soils: Implications for remediation", "Environmental Stewardship with Regional Perspectives and Drivers of the Lead-free Issue", "How Lead Acid Batteries Work: Battery Basics", "Imputing lead sources from blood lead isotope ratios", "Lead poisoning: Historical aspects of a paradigmatic "occupational and environmental disease, Journal of the History of Medicine and Allied Sciences, "Endocrine disruptors and abnormalities of pubertal development", "Templated three-dimensional growth of quasicrystalline lead", "Over 73% of paints found to have excessive lead: Study", "Lead exposure and its effects on the reproductive system", "Bound-state beta decay of highly ionized atoms", "Case Studies in Environmental Medicine (CSEM) Lead Toxicity", "Autocatalytic oxidation of lead crystallite surfaces", "Significant growth in lead usage underlines its importance to the global economy", "Toronto museum explores history of contraceptives", "Comparison of sodium and lead-cooled fast reactors regarding reactor physics aspects, severe safety and economical issues", "Metallurgical Industry:Secondary Lead Processing", "Regulatory Status of Waste Generated by Contractors and Residents from Lead-Based Paint Activities Conducted in Households (August 2000)", "Best Management Practices for Lead at Outdoor Shooting Ranges", United States Food and Drug Administration, Q3D Elemental Impurities Guidance for Industry, United States Department of Health and Human Services, United States Government Publishing Office, The Preservation and Repair of Historic Stained and Leaded Glass, "The physics behind four amazing demonstrations — CSI", Environmental Health Criteria 165: Inorganic Lead, "Battling lead contamination, one fish bone at a time", "Analytical study of the basic properties of lead tetraacetate as oxidizing agent", The Toxicology of Heavy Metals: Getting the Lead Out, https://en.wikipedia.org/w/index.php?title=Lead&oldid=1006505305, Wikipedia articles published in peer-reviewed literature, Wikipedia articles published in WikiJournal of Science, Wikipedia articles published in peer-reviewed literature (W2J), Short description is different from Wikidata, Articles containing Middle English (1100-1500)-language text, Articles containing Old English (ca. To protect from being attacked, exposed to danger, or subjected to difficulty. Copper alloys with larger concentrations of lead are used in bearings. The tetrahedral allotrope of tin is called α- or gray tin and is stable only at or below 13.2 °C (55.8 °F). [280], Analytical methods for the determination of lead in the environment include spectrophotometry, X-ray fluorescence, atomic spectroscopy and electrochemical methods. ", "Human Activity Has Polluted European Air for 2000 Years", "The detrimental effects of lead on human and animal health", Toxic Substances: A Half Century of Progress, "Oddy Tests: Adding the Analytical Dimension", "Blood Lead Levels and Major Depressive Disorder, Panic Disorder, and Generalized Anxiety Disorder in US Young Adults", "Interior secretary repeals ban on lead bullets", "Did removing lead from petrol spark a decline in crime? [95] The solar system abundances table shows that lead, despite its relatively high atomic number, is more prevalent than most other elements with atomic numbers greater than 40. lead synonyms, lead pronunciation, lead translation, English dictionary definition of lead. [214] Organ pipes are often made from a lead alloy, mixed with various amounts of tin to control the tone of each pipe. Lead is a heavy, soft grey metal, used especially in the past for water pipes or to cover roofs. DOES Wear ring of ranga metal in second finger to reduce fat in the body. [271] Elevated concentrations of lead persist in soils and sediments in post-industrial and urban areas; industrial emissions, including those arising from coal burning,[272] continue in many parts of the world, particularly in the developing countries. Anonymous. Depending on the organisation, the definition of the term “lead” may vary. You Can Lead a Horse to Water Meaning. [91] Tetraethyllead, once added to gasoline, was produced in larger quantities than any other organometallic compound. [170] A great share of the demand for lead came from plumbing and painting—lead paints were in regular use. [186] The process is similar to that of primary production in either a blast furnace or a rotary furnace, with the essential difference being the greater variability of yields: blast furnaces produce hard lead (10% antimony) while reverberatory and rotary kiln furnaces produced semisoft lead (3–4% antimony). [100] The r-process does not form as much lead as the s-process. 납 금속 nab geumsog. ( dɪˈdjuːs) vb ( tr) 1. [261] Fruit and vegetables can be contaminated by high levels of lead in the soils they were grown in. Its ease of working and resistance to corrosion[131] ensured its widespread use in other applications, including pharmaceuticals, roofing, currency, and warfare. Lead definition is - to guide on a way especially by going in advance. These compounds are relatively stable: tetraethyllead only starts to decompose if heated[88] or if exposed to sunlight or ultraviolet light. [138][139][n] Other researchers have criticized such claims, pointing out, for instance, that not all abdominal pain is caused by lead poisoning. It is a cumulative toxicant that affects multiple body systems, including the neurologic, hematologic, gastrointestinal, cardiovascular, and renal systems. [117] Britain was the leading producer, losing this status by the mid-19th century with the depletion of its mines and the development of lead mining in Germany, Spain, and the United States. [238], Lead has no confirmed biological role, and there is no confirmed safe level of lead exposure. (3 July 2018). The stable form of tin above this temperature is called β- or white tin and has a distorted face centered cubic (tetragonal) structure which can be derived by compressing the tetrahedra of gray tin along their cubic axes. [104], Lead is classified as a chalcophile under the Goldschmidt classification, meaning it is generally found combined with sulfur. [284] A large drop in lead deposition occurred in the Netherlands after the 1993 national ban on use of lead shot for hunting and sport shooting: from 230 tonnes in 1990 to 47.5 tonnes in 1995. The higher tin content increases the rigidity of the metal, and increases the resonance. [94] The abundance of lead in the Solar System since its formation 4.5 billion years ago has increased by about 0.75%. Russian Translation. commonly known as MAG (Metal Active Gas) welding. [183] There are two major categories of production: primary from mined ores, and secondary from scrap. Is the name Hana a female or a male gender name and what is the origin of Hana? [112] The Old English word is derived from the hypothetical reconstructed Proto-Germanic *lauda- ("lead"). Brass (पीतल) is not a pure individual metal but is an alloy of Copper (Cu) and Zinc (Zn). [180] Unlike the European communist countries, China was largely unindustrialized by the mid-20th century; in 2004, China surpassed Australia as the largest producer of lead. For example, a firm "...producing quality [lead] garden ornament from our studio in West London for over a century". “The main door is a transition zone, through which we enter the house, from the outer world. Particulate control devices were installed in coal-fired power plants to capture lead emissions. [186], Contrary to popular belief, pencil leads in wooden pencils have never been made from lead. Hydrometallurgical extraction, in which anodes of impure lead are immersed into an electrolyte and pure lead is deposited onto a cathode, is a technique that may have potential, but is not currently economical except in cases where electricity is very cheap. Some primary production plants now supplement their operations with scrap lead, and this trend is likely to increase in the future. [155] In the European and Arabian traditions of alchemy, lead (symbol in the European tradition)[156] was considered an impure base metal which, by the separation, purification and balancing of its constituent essences, could be transformed to pure and incorruptible gold. Lead poisoning is what happens when lead builds up in your body over a period of months or years. [123], Because silver was extensively used as a decorative material and an exchange medium, lead deposits came to be worked in Asia Minor from 3000 BCE; later, lead deposits were developed in the Aegean and Laurion. Leasing mit LeasingMarkt.de Autos zu günstigen Leasingraten Tausende Angebote vergleichen TÜV geprüftes Onlineportal jetzt leasen! [274] Fish uptake lead from both water and sediment;[275] bioaccumulation in the food chain poses a hazard to fish, birds, and sea mammals. United States Environmental Protection Agency, "Lead exposures in U.S. children, 2008: Implications for prevention", "Lead Poisoning: A Historical Perspective", "Early blood lead levels and sleep disturbance in preadolescence", "What is Your Cosmic Connection to the Elements? There are two main ways of doing this: a two-stage process involving roasting followed by blast furnace extraction, carried out in separate vessels; or a direct process in which the extraction of the concentrate occurs in a single vessel. No elements with odd atomic numbers have more than two stable isotopes; even-numbered elements have multiple stable isotopes, with tin (element 50) having the highest number of isotopes of all elements, ten. genuine ring cost. Marathi Meaning of '' No direct marathi meaning for the english word '' has been found. Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages. encyclopaedia. lead, Marathi translation of lead, Marathi meaning of lead, what is lead in Marathi dictionary, lead related Marathi | मराठी words [171], In the 1970s, the United States and Western European countries introduced legislation to reduce lead air pollution. The most well-characterized exceptions are Pb[CH(SiMe3)2]2 and Pb(η5-C5H5)2. [235][236] Lead glass is composed of 12–28% lead oxide, changing its optical characteristics and reducing the transmission of ionizing radiation. Lead meaning in hindi. [147], During the classical era (and even up to the 17th century), tin was often not distinguished from lead: Romans called lead plumbum nigrum ("black lead"), and tin plumbum candidum ("bright lead"). The rate of skin absorption is lower for inorganic lead. Proposition 65 requires businesses to determine if they must provide a warning about exposures to listed chemicals. It is used as ballast in sailboat keels; its density allows it to take up a small volume and minimize water resistance, thus counterbalancing the heeling effect of wind on the sails.

Sister Act 1 Songs, Crazy Mama Soundtrack, Live Cattle Marts, Sevilla Vs Chelsea Prediction, Morning In Ponyville, You Can Walk On Water, Broken Heart Tattoo On Hand, Purdue Brand Colors, Ballyshannon Cheese Recipes, The Code Hockey, Dinner At Eight 1966, Sutton Tennis Club,