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Toxic Heavy Metal
A toxic heavy metal is any relatively dense metal or metalloid that is noted for its potential toxicity, especially in environmental contexts. The term has particular application to cadmium, mercury and lead, all of which appear in the World Health Organization's list of 10 chemicals of major public concern. Other examples include manganese, chromium, cobalt, nickel, copper, zinc, silver, antimony and thallium. Heavy metals are found naturally in the earth. They become concentrated as a result of human caused activities and can enter plant and animal (including human) tissues via inhalation, diet, and manual handling. Then, they can bind to and interfere with the functioning of vital cellular components. The toxic effects of arsenic, mercury, and lead were known to the ancients, but methodical studies of the toxicity of some heavy metals appear to date from only 1868. In humans, heavy metal poisoning is generally treated by the administration of chelating agents. Some elements ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thallium
Thallium is a chemical element with the symbol Tl and atomic number 81. It is a gray post-transition metal that is not found free in nature. When isolated, thallium resembles tin, but discolors when exposed to air. Chemists William Crookes and Claude-Auguste Lamy discovered thallium independently in 1861, in residues of sulfuric acid production. Both used the newly developed method of flame spectroscopy, in which thallium produces a notable green spectral line. Thallium, from Greek , , meaning "green shoot" or "twig", was named by Crookes. It was isolated by both Lamy and Crookes in 1862; Lamy by electrolysis, and Crookes by precipitation and melting of the resultant powder. Crookes exhibited it as a powder precipitated by zinc at the international exhibition, which opened on 1 May that year. Thallium tends to form the +3 and +1 oxidation states. The +3 state resembles that of the other elements in group 13 ( boron, aluminium, gallium, indium). However, the +1 state, whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solder
Solder (; NA: ) is a fusible metal alloy used to create a permanent bond between metal workpieces. Solder is melted in order to wet the parts of the joint, where it adheres to and connects the pieces after cooling. Metals or alloys suitable for use as solder should have a lower melting point than the pieces to be joined. The solder should also be resistant to oxidative and corrosive effects that would degrade the joint over time. Solder used in making electrical connections also needs to have favorable electrical characteristics. Soft solder typically has a melting point range of , and is commonly used in electronics, plumbing, and sheet metal work. Alloys that melt between are the most commonly used. Soldering performed using alloys with a melting point above is called "hard soldering", "silver soldering", or brazing. In specific proportions, some alloys are eutectic — that is, the alloy's melting point is the lowest possible for a mixture of those components, and co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moonshine
Moonshine is high-proof liquor that is usually produced illegally. The name was derived from a tradition of creating the alcohol during the nighttime, thereby avoiding detection. In the first decades of the 21st century, commercial distilleries have begun producing their own novelty versions of moonshine, including many flavored varieties. Terminology Different languages and countries have their own terms for moonshine (see '' Moonshine by country''). In English, moonshine is also known as ''mountain dew'', ''choop'', ''hooch'' (abbreviation of ''hoochinoo'', name of a specific liquor, from Tlingit), ''homebrew'', ''mulekick'', ''shine'', ''white lightning'', ''white/corn liquor'', ''white/corn whiskey'', ''pass around'', ''firewater, bootleg''. Fractional crystallization The ethanol may be concentrated in fermented beverages by means of freezing. For example, the name ''applejack'' derives from the traditional method of producing the drink, ''jacking'', the proc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Finch
The true finches are small to medium-sized passerine birds in the family Fringillidae. Finches have stout conical bills adapted for eating seeds and nuts and often have colourful plumage. They occupy a great range of habitats where they are usually resident and do not migrate. They have a worldwide distribution except for Australia and the polar regions. The family Fringillidae contains more than two hundred species divided into fifty genera. It includes species known as siskins, canaries, redpolls, serins, grosbeaks and euphonias. Many birds in other families are also commonly called "finches". These groups include the estrildid finches ( Estrildidae) of the Old World tropics and Australia; some members of the Old World bunting family ( Emberizidae) and the New World sparrow family ( Passerellidae); and the Darwin's finches of the Galapagos islands, now considered members of the tanager family ( Thraupidae).Newton (1973), Clement ''et al.'' (1993) Finches and canaries ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stabilizer (chemistry)
In industrial chemistry, a stabilizer or stabiliser is a chemical that is used to prevent degradation. File:BigPhosphite31570-04-4.png, Tris(2,4-di-tert-butylphenyl)phosphite is a widely used stabilizer in polymers. File:HALSgeneric.png, Partial structure of typical hindered amine light stabilizers, widely used to protect automotive paints from degradation by UV-light. File:Salpn.png, Salpn is a typical metal deactivator used as a fuel additive to suppress oxidation processes that lead to gums and solids. Metal deactivators like salpn form stable complexes with the metals, suppressing their catalytic activity. Overview Heat and light stabilizers are added to plastics because they ensure safe processing and protect products against aging and weathering. The trend is towards fluid systems, pellets, and increased use of masterbatches. There are monofunctional, bifunctional, and polyfunctional stabilizers. In economic terms the most important product groups on the market for stabi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cole
Cole may refer to: Plants * Cole crops of the genus ''Brassica'', especially cabbage, kale, or rape (rapeseed). People * Cole (given name), people with the given name Cole * Cole (surname), people with the surname Cole Companies *Cole Motor Car Company, a pioneer American name automobile company (1909–1925) Places Antarctic * Cole Peninsula, a peninsula on the continent of slavery Canada *Cole Harbour, Nova Scotia, a community of Halifax Regional Municipality, Nova Scotia ** Cole Harbour ** Cole Harbour (Guysborough), Nova Scotia England * Cole, Somerset, a hamlet in Pitcombe parish * Cole (for Bruton) railway station, a former station in the hamlet France *Côle, a river in southwestern France Poland * Cole, Pomeranian Voivodeship Northern Ireland * Cole, County Tyrone, a townland in County Tyrone, Northern Ireland United States *Cole, Indiana, an unincorporated community in Grant County *Cole, Oklahoma, a town in McClain County, Oklahoma * Coleville, Californi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Howell
Howell may refer to: Places In the United Kingdom *Howell, Lincolnshire, England In the United States *Howell, Georgia * Howell, Evansville, a neighborhood of Evansville, Indiana *Howell, Michigan * Howell, Missouri *Howell, Utah * Howell County, Missouri *Howell High School (Howell, Michigan) * Howell High School (New Jersey) *Howell Mountain, California **Howell Mountain AVA, an American Viticultural Area in Napa County, California *Howell Township (other), several places Business establishments *Böwe Bell & Howell, American manufacturer and supplier of media technologies * Howells (department store), large department store in Cardiff, Wales, established by James Howell *Howell, Soskin, a defunct American publisher acquired by Crown Books *John Howell & Son, British building and engineering company Other uses *Howell (name), a surname and given name * Howell torpedo, an early type of U.S. Navy torpedo *Howell, a table movement system used in duplicate bridge (se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microplastics
Microplastics are fragments of any type of plastic less than in length, according to the U.S. National Oceanic and Atmospheric Administration (NOAA) and the European Chemicals Agency. They cause pollution by entering natural ecosystems from a variety of sources, including cosmetics, clothing, food packaging, and industrial processes. The term ''macroplastics'' is used to differentiate microplastics from larger plastic waste, such as plastic bottles. Two classifications of microplastics are currently recognized. Primary microplastics include any plastic fragments or particles that are already 5.0 mm in size or less before entering the environment. These include microfibers from clothing, microbeads, and plastic pellets (also known as nurdles). Secondary microplastics arise from the degradation (breakdown) of larger plastic products through natural weathering processes after entering the environment. Such sources of secondary microplastics include water and soda bottles, fis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvey
Harvey, Harveys or Harvey's may refer to: Arts, entertainment, and media * ''Harvey'' (play), a 1944 play by Mary Chase about a man befriended by an invisible anthropomorphic rabbit * Harvey Awards ("Harveys"), one of the most important awards in American comic industry, founded in 1988 * "Harvey", a song by Her's off the album '' Invitation to Her's'', 2018 Films * ''Harvey'' (1950 film), a 1950 film adapted from Mary Chase's play, starring James Stewart * ''Harvey'' (1996 film), a 1996 American made-for-television film * ''Harvey'' (Hallmark), a 1972 adaptation of Mary Chase's play for the ''Hallmark Hall of Fame'' Characters * Harvey (''Farscape''), a character in the TV show ''Farscape'' * Harvey, a crane engine in ''Thomas & Friends'' * Harvey Beaks, in the Nickelodeon animated series ''Harvey Beaks'' * Harvey Birdman, title character from the teen-adult animated series ''Harvey Birdman, Attorney at Law'' * Harvey Dent, fictional District Attorney and supervillain ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead–acid Battery
The lead–acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Planté. It is the first type of rechargeable battery ever created. Compared to modern rechargeable batteries, lead–acid batteries have relatively low energy density. Despite this, their ability to supply high surge currents means that the cells have a relatively large power-to-weight ratio. These features, along with their low cost, make them attractive for use in motor vehicles to provide the high current required by starter motors. Lead-acid batteries suffer from relatively short cycle lifespan (usually less than 500 deep cycles) and overall lifespan (due to the "double sulfation" in the discharged state). As they are inexpensive compared to newer technologies, lead–acid batteries are widely used even when surge current is not important and other designs could provide higher energy densities. In 1999, lead–acid battery sales accounted for 40–50% of the value fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joss Paper
Joss paper, also known as incense papers, are papercrafts or sheets of paper made into burnt offerings common in Chinese ancestral worship (such as the veneration of the deceased family members and relatives on holidays and special occasions). Worship of deities in Chinese folk religion also uses a similar type of joss paper. Joss paper, as well as other papier-mâché items, are also burned or buried in various Asian funerals, "to ensure that the spirit of the deceased has sufficient needs in the afterlife." In Taiwan alone, the annual revenue of temples received from burning joss paper was US$400 million (NT$13 billion) as of 2014. Traditional Joss paper is traditionally made from coarse bamboo paper, which feels handmade with many variances and imperfections, although rice paper is also commonly used. Traditional joss is cut into individual squares or rectangles. Depending on the region, Joss paper may be decorated with seals, stamps, pieces of contrasting paper, engraved ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
