See Nautica Thorn for the Hawaiian pornstar
Nautica is a designer outerwear company founded by David Chu in 1983.
Since its global inception almost two decades ago, Nautica has evolved into a complete lifestyle brand. The line of products includes Nautica Sportswear, Jeans, Tailored, Swimwear, Sleepwear, Boys, a full line of accessories including Eyewear, Watches and Fragrances, and a Nautica Home Collection. It is often worn by men and women of a higher income bracket who also indulge in the wearing of brand names such as Polo Ralph Lauren and Gant USA.
The brand is now owned by the VF Corporation.
This page about Nautica includes information from a Wikipedia article.
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The brand is now owned by the VF Corporation. Rather, plum is derived from the Old English word plume. It is often worn by men and women of a higher income bracket who also indulge in the wearing of brand names such as Polo Ralph Lauren and Gant USA. The plum, however, does not get its name from this root. The line of products includes Nautica Sportswear, Jeans, Tailored, Swimwear, Sleepwear, Boys, a full line of accessories including Eyewear, Watches and Fragrances, and a Nautica Home Collection. The Latin plumbum has given birth to a number of terms in the English language:. Since its global inception almost two decades ago, Nautica has evolved into a complete lifestyle brand. The earliest pencils actually used lead, though 'pencil leads' have been made for the last couple of centuries from graphite, a naturally occurring form (allotrope) of carbon.
Nautica is a designer outerwear company founded by David Chu in 1983. For that reason many universities do not hand out lead-containing samples to women for instructional laboratory analyses. See Nautica Thorn for the Hawaiian pornstar. Lead is considered to be particularly harmful for women's ability to reproduce. It has been suggested that what was known as "Devon colic" arose from the use of lead-lined presses to extract apple juice in the manufacture of cider. Lead salts used in pottery glazes have on occasion caused poisoning, when acid drinks, such as fruit juices, have leached lead ions out of the glaze.
Paint containing lead has been withdrawn from sale in industralised countries, though many older houses may still contain substantial lead in their old paint: it is generally recommended that old paint should not be stripped by sanding, as this generates inhalable dust. The concern about lead's role in mental retardation in children has brought about widespread reduction in its use (lead exposure has been linked to schizophrenia). Main article: lead poisoning. Although this has been banned in industrialized nations, there was a recent scandal involving lead-laced Mexican candy being eaten by children in California (http://www.ocregister.com/investigations/2004/lead/part1_printable.html).
At one point in time, some lead compounds, because of their sweetness, were used by candy makers. The historical use of lead acetate (also known as sugar of lead) by the Roman Empire as a sweetener for wine is considered by some to be the cause of the dementia which affected many of the Roman Emperors. Long term exposure to lead or its salts (especially soluble salts or the strong oxidant PbO2) can cause nephropathy, and colic-like abdominal pains. Lead is a poisonous metal that can damage nervous connections (especially in young children) and cause blood and brain disorders.
The ranges of isotopic ratios for most natural materials are 14.0 - 30.0 for 206Pb/204Pb, 15.0 - 17.0 for 207Pb/204Pb, and 35.0 - 50.0 for 208Pb/204Pb, although numerous examples outside these ranges are reported in the literature. Each is reported relative to 204Pb, the only non-radiogenic stable isotope. The corresponding half-lives of these decay schemes vary markedly: 4.47 × 109, 7.04 × 108 and 1.4 × 1010 years, respectively. 206Pb, 207Pb and 208Pb are all radiogenic, and are the end products of complex decay chains that begin at 238U, 235U and 232Th, respectively.
Lead has four stable, naturally occurring isotopes: 204Pb (1.4%), 206Pb (24.1%), 207Pb (22.1%), and 208Pb (52.4%). Main Article: Isotopes of lead. The molten lead bullion is then refined by additional smelting with air being passed over the lead to form a slag layer containing any remaining impurities and producing 99.9% pure lead. The lead is then cooled in stages which causes the lighter impurites (dross) to rise to the surface where they can be removed.
The concentrate is sintered before being smelted in to produce a 97% lead concentrate. The concentrate, which can range from 50% to 60% lead, is dried and then treated using pyrometallurgy. The Froth flotation process separates the lead and other minerals from the waste rock (tailings) to form a concentrate. The ore is then treated using extractive metallurgy.
In mining, the ore is extracted by drilling or blasting and then crushed and ground. But more than half of the lead used currently comes from recycling. Other common varieties are cerussite (PbCO3) and anglesite (PbSO4). The main lead mineral is galena (PbS), which contains 86.6% lead.
Currently lead is usually found in ore with zinc, silver and (most abundantly) copper, and is extracted together with these metals. Native lead does occur in nature, but it is rare. Recently, lead use is being further curtailed by the RoHS directive. lead consumers' compliance with environmental regulations that significantly reduced or eliminated the use of lead in nonbattery products, including gasoline, paints, solders, and water systems.
Much of this shift was a result of the U.S. By the mid-1980s, a significant shift in lead end-use patterns had taken place. The English word "plumbing" also derives from this Latin root. Lead's symbol Pb is an abbreviation of its Latin name plumbum.
Lead pipes that bear the insignia of Roman emperors are still in service and many Roman "pigs" (ingots) of lead figure in Derbyshire lead mining history and in the history of the industry in other English centres. Alchemists thought that lead was the oldest metal and associated it with the planet Saturn. Lead was mentioned in the Book of Exodus. In the early bronze age lead was used with antimony and arsenic.
Lead has been used by humans for at least 7000 years, because it was (and continues to be) widespread and easy to extract, as well as easy to work with, being both highly malleable and ductile as well as easy to smelt. Lead is the only metal in which there is zero Thomson effect. Lead can be toughened by adding a small amount of antimony or other metals to it. sulfuric acid).
Because of this property, it is used to contain corrosive liquids (e.g. This true metal is highly resistant to corrosion. Lead has a bright luster and is a dense, ductile, very soft, highly malleable, bluish-white metal that has poor electrical conductivity. .
(But see the article on Bismuth, which has a half life so long it can be considered stable.). Lead has the highest atomic number of all stable elements. Lead is used in building construction, lead-acid batteries, bullets and shot, and is part of solder, pewter, and fusible alloys. A soft, heavy, toxic and malleable poor metal, lead is bluish white when freshly cut but tarnishes to dull gray when exposed to air.
plumbum) and atomic number 82. Lead is a chemical element in the periodic table that has the symbol Pb (L.
A Small Dose of Toxicology:Lead. 41-52, 1968. 1., p. In: Curator, 11, No.
Keisch, B: Discriminating Radioactivity Measurements of Lead: New Tool for Authentication. 413-415, 1968. In: Science, 160, p. Keisch, B: Dating Works of Art Trough their Natural Radioactivity: Improvements and Applications.
1238-1242, 1967. 3767, p. In: Science, 155, No. R.: Dating and Authenticating Works of Art by Measurement of Natural Alpha Emitters.
S., and Edwards, R. L., Levine, A. Keisch, B., Feller, R. Aplomb comes from the French à plomb, meaning plumb vertical, and therefore confident and cool.
Plumbism is the medical term for lead poisoning. sense of plum (derived from plumb) meaning 'completely'. Plumb crazy may derive from the fact that lead poisoning can cause insanity; or, according to the Oxford English Dictionary, from a U.S. Plumbing the depths derives from the use of the lead weight to draw the sounding line down to the bottom of the water body (or to the end of the line if the water's really deep!).
Plumb wall is so-said because a plumb bob is used to find the vertical. Plumb bob or plummet, a small, pointed body of metal the weight of which is used to draw a string vertical under tension, refers to the fact that they were originally made from lead. Plumbing, or system of piping, derives from the fact that pipes were once made of lead. see isotope geochemistry.
See Category:Lead minerals. Lead is used as electrodes in the process of electrolysis. Tetraethyl lead has been used in leaded fuels to reduce engine knocking; however, this is no longer common practice in the Western World due to health concerns. It changes the optical characteristics of the glass and reduces the transmission of radiation.
Lead glass is comprised of 12-28% lead. for lead cooled fast reactors. Molten lead is used as a coolant, eg. Lead is used as shielding from radiation.
. Because of the dangers, European and North American manufacturers use more expensive alternatives such as zinc. Lead is used in some candles to treat the wick to ensure a longer, more even burn. Lead is used as projectiles for firearms and fishing sinkers because of its density, low cost verse alternative products and ease of use due to relatively low melting point.
Lead sticks were used as pencils but has been replaced by graphite for the last 450 years. Lead was used for plumbing in Ancient Rome and water mains and service pipes up until the early 1970's. Lead is used as a coloring element in ceramic glazes, notably in the colors red and yellow. Lead was used as a pigment in Lead paint for white as well as yellow and red colors.
Lead is a major constituent of the Lead-acid battery used extensively in car batteries.