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Fluorsid
Fluorsid S.p.A. is an Italian company active in the chemical and mining industry, and precisely involved in the production and sales of inorganic fluorine derivatives. The historic production site is located in Macchiareddu, in the industrial area of Cagliari, in Sardinia, but the company has plants and headquarters also located in the Italian peninsula, Norway, Switzerland and United Kingdom. History Historically, since the Neolithic era, the populations that have inhabited Sardinia have always exploited the mineral wealths and varieties present in its subsoil. These mining activities grew considerably between the nineteenth and twentieth centuries: in 1850 there were more than 250 mining concessions. This period was dominated by the extraction of lead and zinc which made the fortune of Arburese, Iglesiente and the Barony of Siniscola regions. The sector, however, went into crisis after the Second World War and many of these mines were closed or downsized. On the contrary, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Privately Held Company
A privately held company (or simply a private company) is a company whose shares and related rights or obligations are not offered for public subscription or publicly negotiated in the respective listed markets, but rather the company's stock is offered, owned, traded, exchanged privately, or Over-the-counter (finance), over-the-counter. In the case of a closed corporation, there are a relatively small number of shareholders or company members. Related terms are closely-held corporation, unquoted company, and unlisted company. Though less visible than their public company, publicly traded counterparts, private companies have major importance in the world's economy. In 2008, the 441 list of largest private non-governmental companies by revenue, largest private companies in the United States accounted for ($1.8 trillion) in revenues and employed 6.2 million people, according to ''Forbes''. In 2005, using a substantially smaller pool size (22.7%) for comparison, the 339 companies on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trading
Trade involves the transfer of goods and services from one person or entity to another, often in exchange for money. Economists refer to a system or network that allows trade as a market. An early form of trade, barter, saw the direct exchange of goods and services for other goods and services, i.e. trading things without the use of money. Modern traders generally negotiate through a medium of exchange, such as money. As a result, buying can be separated from selling, or earning. The invention of money (and letter of credit, paper money, and non-physical money) greatly simplified and promoted trade. Trade between two traders is called bilateral trade, while trade involving more than two traders is called multilateral trade. In one modern view, trade exists due to specialization and the division of labour, a predominant form of economic activity in which individuals and groups concentrate on a small aspect of production, but use their output in trades for other products a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regional Council Of Sardinia ...
The Regional Council of Sardinia (''Consiglio Regionale della Sardegna'') is the legislative assembly of the autonomous region of Sardinia. The assembly was elected for the first time in 1949. Composition Following the modification of the regional statute, with the constitutional law 3/2013, the number of regional councillors was reduced from 80 to 60. Political groups The Regional Council of Sardinia is currently composed of the following political groups: See also * Regional council *Politics of Sardinia *President of Sardinia References External linksRegional Council of Sardinia {{Authority control Politics of Sardinia Italian Regional Councils Sardinia Sardinia ( ; it, Sardegna, label=Italian, Corsican and Tabarchino ; sc, Sardigna , sdc, Sardhigna; french: Sardaigne; sdn, Saldigna; ca, Sardenya, label=Algherese and Catalan) is the second-largest island in the Mediterranean Sea, after ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerrei
Sarrabus-Gerrei is a sub-region of south-eastern Sardinia, Italy. Sarrabus Traditionally Sarrabus, probably from the Roman-time city of Sarcopos, occupies the area of the communes of Castiadas, Muravera, San Vito and Villaputzu, corresponding to the curatory with the same name of the medieval giudicato of Cagliari. Geologically, it dates to the Palaeozoic era and it is crossed by the Flumendosa, initially in a valley and then to a coastal plain on the Tyrrhenian Sea. Specimens of the mineral ullmannite (NiSbS) were found at Sarrabus in 1887. The crystals of the specimens from Sarrabus were described as hemihedral with parallel faces, whereas specimens from Lölling in present-day Austria were hemihedral with inclined faces. Gerrei Gerrei is composed of the territories of Armungia, Ballao, Escalaplano, Goni, San Nicolò Gerrei, Silius, Villasalto, San Basilio. It also corresponds to a medieval curatory (province) of the Giudicato of Cagliari. It is characterized by a series of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barium
Barium is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element. The most common minerals of barium are baryte ( barium sulfate, BaSO4) and witherite (barium carbonate, BaCO3). The name ''barium'' originates from the alchemical derivative "baryta", from Greek (), meaning 'heavy'. ''Baric'' is the adjectival form of barium. Barium was identified as a new element in 1774, but not reduced to a metal until 1808 with the advent of electrolysis. Barium has few industrial applications. Historically, it was used as a getter for vacuum tubes and in oxide form as the emissive coating on indirectly heated cathodes. It is a component of YBCO (high-temperature superconductors) and electroceramics, and is added to steel and cast iron to reduce the size of carbon grains within the microstructure. Barium compounds ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fluorine
Fluorine is a chemical element with the symbol F and atomic number 9. It is the lightest halogen and exists at standard conditions as a highly toxic, pale yellow diatomic gas. As the most electronegative reactive element, it is extremely reactive, as it reacts with all other elements except for the light inert gases. Among the elements, fluorine ranks 24th in universal abundance and 13th in terrestrial abundance. Fluorite, the primary mineral source of fluorine which gave the element its name, was first described in 1529; as it was added to metal ores to lower their melting points for smelting, the Latin verb meaning 'flow' gave the mineral its name. Proposed as an element in 1810, fluorine proved difficult and dangerous to separate from its compounds, and several early experimenters died or sustained injuries from their attempts. Only in 1886 did French chemist Henri Moissan isolate elemental fluorine using low-temperature electrolysis, a process still employed for modern pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siniscola
Siniscola (; sc, Thiniscòle ) is a ''comune'' (municipality) in the province of Nuoro in the Italian region Sardinia, located about northeast of Cagliari and about northeast of Nuoro. Siniscola borders the following municipalities: Irgoli, Lodè, Lula, Onifai, Orosei, Posada, Torpè Torpè ( sc, Torpè) is a ''comune'' (municipality) in the Province of Nuoro in the Italian region Sardinia, located about northeast of Cagliari and about northeast of Nuoro. As of 31 December 2004, it had a population of 2,757 and an area of . .... References Cities and towns in Sardinia {{Sardinia-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iglesias, Sardinia
Iglesias (, ; from ; sc, Igrèsias) is a ''comune'' and city in the province of South Sardinia, Italy. It was co-capital of the province of Carbonia-Iglesias with Carbonia, and the province's second-largest community. Under Spanish control Iglesias was one of the most important royal cities on Sardinia, and it is the seat of the Roman Catholic Diocese of Iglesias. At an elevation of in the hills of southwestern Sardinia, it was the centre of a mining district from which lead, zinc, and silver were extracted. Iglesias was also a centre for the distillation of sulfuric acid. History Prehistory and ancient history The area around present-day Iglesias was inhabited in prehistory, with the oldest traces of human settlement dating to the Neolithic. The fourth-millennium-BC domus de Janas, attributed to the Ozieri culture, were discovered in the mountainous region of San Benedetto. Other pre-Nuragic finds attributed to the Monte Claro, Bell Beaker and Bonnanaro cultures were discov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arbus, Sardinia
Arbus () is a ''comune'' (municipality) in the Province of South Sardinia in the Italian region of Sardinia. Located in the southwest coast of the island, Arbus is known for several archeological and non-operational industrial sites, such as the mines of Montevecchio, as well as for its coastline, the Costa Verde, whose main beach, Piscinas, includes one of the biggest sand dune systems in Europe. Arbus territory also includes several hamlets, among which Ingurtosu and Montevecchio are particularly important since they still show tangible signs of the intensive mineral extraction that took place during the 19th and the first half of the 20th century, in nowadays non-operational extraction sites that are now part of the ''parco geominerario storico ed ambientale della Sardegna'' (i.e. Sardinian Environmental and Historical Geomineral Park, also known as Geological, Mining Park of Sardinia). The town is well renowned also for its black sheep, that is bred virtually only there, who ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinc
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. In some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size.The elements are from different metal groups. See periodic table. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc is refined by froth flotation of the ore, roasting, and final extraction using electricity ( electrowinning). Zinc is an essential trace element for humans, animals, plants and for microorganisms and is necessary for prenatal and postnatal development. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead
Lead is a chemical element with the symbol Pb (from the Latin ) 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 air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is toxic, even in small amounts, especially to children. Lead is a relatively unreactive post-transition metal. Its weak metallic character is illustrated by its amphoteric nature; lead and lead oxides react with acids and bases, and it tends to form covalent bonds. Compounds of lead are usually found in the +2 oxidation state rather than the +4 state common with lighter members of the carbon group. Exceptions are mostly limited to organolead compounds. Like the lighter members of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neolithic
The Neolithic period, or New Stone Age, is an Old World archaeological period and the final division of the Stone Age. It saw the Neolithic Revolution, a wide-ranging set of developments that appear to have arisen independently in several parts of the world. This "Neolithic package" included the introduction of farming, domestication of animals, and change from a hunter-gatherer lifestyle to one of settlement. It began about 12,000 years ago when farming appeared in the Epipalaeolithic Near East, and later in other parts of the world. The Neolithic lasted in the Near East until the transitional period of the Chalcolithic (Copper Age) from about 6,500 years ago (4500 BC), marked by the development of metallurgy, leading up to the Bronze Age and Iron Age. In other places the Neolithic followed the Mesolithic (Middle Stone Age) and then lasted until later. In Ancient Egypt, the Neolithic lasted until the Protodynastic period, 3150 BC.Karin Sowada and Peter Grave. Egypt in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
