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Breviksfjorden
The Langesundsfjord (), also known as the Breviksfjord (), is a stretch of fjord from northern Skagerrak, between the islands of Sandøya, Bjørkøya and Siktesøya in Porsgrunn municipality and the mainland of Bamble municipality, in Telemark county in the southeastern part of Norway. Location The fjord stretches from the strait Langesund until Brevik, where it separates into the Frierfjord and the Eidangerfjord. In the mediaeval period the fjord was named ''Grenmar'', after the ''grener'' people who lived here and ''mar'' which was Old Norse for sea. Later, well into the 1700s, the entire stretch from Langesund gap and up to Skien was referred to as Langesundsfjord. Langesundsfjorden is especially noted for the discovery of fluorescent minerals. Many of the minerals found here are relatively rare. Commercial quarrying for decorative stone started in the late 1880s. In 1881, Diderik Cappelen (1856-1935), first found Cappelenite in Langesundsfjorden. Cappelenite, which h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediaeval
In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire and transitioned into the Renaissance and the Age of Discovery. The Middle Ages is the middle period of the three traditional divisions of Western history: classical antiquity, the medieval period, and the modern period. The medieval period is itself subdivided into the Early, High, and Late Middle Ages. Population decline, counterurbanisation, the collapse of centralized authority, invasions, and mass migrations of tribes, which had begun in late antiquity, continued into the Early Middle Ages. The large-scale movements of the Migration Period, including various Germanic peoples, formed new kingdoms in what remained of the Western Roman Empire. In the 7th century, North Africa and the Middle East—most recently part of the Eastern Roman ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stathelle
Stathelle is a town in Norway in the municipality of Bamble in the county of Telemark, Norway. History Stathelle was a former municipality in Telemark. It was separated from Bamble as a municipality of its own in 1851. In 1964, the municipalities of Stathelle and Langesund merged with Bamble municipality. With a population of about 8000, Stathelle is situated at the junction of the Langesundsfjord, Frierfjord and Eidangerfjord. Stathelle is an old trading town. In the middle of the 1800s, Stathelle was an enterprising seaport, characterized by the trading house established by Albert Blehr on Kjellestad, which was one of the nation's largest timber exporters. Today there is a marina and a park in the same area. Brevik bridge was constructed during 1962. Previously travelers along the southern highway between Oslo and Stavanger had to take the ferry between the towns of Brevik and Stathelle. Hansen & Arntzen Co AS is a traditional shipyard in Stathelle that specializes in the r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brevik Bridge
Brevik Bridge (in Norwegian language, Norwegian ''Breviksbrua'') is one of two bridges that span the mouth of the Frierfjord. It connects the municipalities of Bamble and Porsgrunn in Vestfold og Telemark county. On the west side, in Bamble, lies Stathelle, while on the east side lies Brevik, Norway, Brevik in Porsgrunn. When the bridge opened in May 1962, it was part of European route E18, E18. In 1996, the nearby Grenland Bridge (in Norwegian ''Grenlandsbrua'') opened, taking over this role. Today, it is part of Norwegian national road, national road (in Norwegian ''riksvei, Rv'') 354. Protection In 1997, the Norwegian Public Roads Administration and Norwegian Directorate for Cultural Heritage were ordered to prepare a protection plan for state-owned roadworks in Norway. The final report published in 2002, National Protection Plan for Roads, Bridges, and Road-Related Cultural Heritage, recommended that both Brevik Bridge and Grenland Bridge be protected. On April 17, 2008, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Borosilicate
Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glasses are known for having very low coefficients of thermal expansion (≈3 × 10−6 K−1 at 20 °C), making them more resistant to thermal shock than any other common glass. Such glass is subjected to less thermal stress and can withstand temperature differentials without fracturing of about . It is commonly used for the construction of reagent bottles and flasks as well as lighting, electronics, and cookware. Borosilicate glass is sold under various trade names, including Borosil, Duran, Pyrex, Glassco, Supertek, Suprax, Simax, Bellco, Marinex (Brazil), BSA 60, BSC 51 (by NIPRO), Heatex, Endural, Schott, Refmex, Kimax, Gemstone Well, and MG (India). Single ended self-starting lamps are insulated with a mica disc and contained in a borosilicate glass gas discharge tube (arc tube) and a metal cap. They include the sodium-vapor lamp that ... [...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] |
Yttrium
Yttrium is a chemical element with the symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a "rare-earth element". Yttrium is almost always found in combination with lanthanide elements in rare-earth minerals, and is never found in nature as a free element. 89Y is the only stable isotope, and the only isotope found in the Earth's crust. The most important uses of yttrium are LEDs and phosphors, particularly the red phosphors in television set cathode ray tube displays. Yttrium is also used in the production of electrodes, electrolytes, electronic filters, lasers, superconductors, various medical applications, and tracing various materials to enhance their properties. Yttrium has no known biological role. Exposure to yttrium compounds can cause lung disease in humans. The element is named after '' ytterbite'', a mineral first identified in 1787 by the chemist Carl Axel Arrhenius. He n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pegmatite
A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than and sometimes greater than . Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition to granite. However, rarer intermediate composition and mafic pegmatites are known. Many of the world's largest crystals are found within pegmatites. These include crystals of microcline, quartz, mica, spodumene, beryl, and tourmaline. Some individual crystals are over long. Most pegmatites are thought to form from the last fluid fraction of a large crystallizing magma body. This residual fluid is highly enriched in volatiles and trace elements, and its very low viscosity allows molecules to migrate rapidly to join an existing crystal rather than coming together to form new crystals. This allows a few very large crystals to form. While most pegmatites have a simple composition of minerals common in ordinary igneous rock, a few ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nepheline Syenite
Nepheline syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or pink, and in general appearance they are not unlike granites, but dark green varieties are also known. Phonolite is the fine-grained extrusive equivalent. Petrology Nepheline syenites are silica-undersaturated and some are peralkaline (terms discussed in igneous rock). Nepheline is a feldspathoid, a solid-solution mineral, that does not coexist with quartz; rather, nepheline would react with quartz to produce alkali feldspar. They are distinguished from ordinary basic syenites not only by the presence of nepheline but also by the occurrence of many other minerals rich in alkalis and in rare earths and other incompatible elements. Alkali feldspar dominates, commonly represented by orthoclase and the exsolved lamellar albite, form perthite. In some rocks the potash feldspar, in others the soda feldspar predominates. Fresh clear m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diderik Cappelen
Diderik or Didrik is a Norwegian male given name. In North Germanic languages, the native form would be ''Tjodrik'', but ''Diderik'' and ''Didrik'' have been loaned from Low German and are now a common name in Norway. It may also be a variant of the related Dutch name Diederik. People with the name include: *Diderik Batens (born 1944), Belgian logician and epistemologist at the University of Ghent *Diderik Bøgvad (1792–1857), Norwegian politician *Diderik von Cappelen (1761–1828), Norwegian merchant and politician *Diderik Hegermann Rye (1832–1914), Norwegian civil servant *Diderik Hegermann (1763–1835), Norwegian councillor of state and Minister of the Army *Diderik Schnitler (born 1946), Norwegian businessperson *Diderik Iversen Tønseth (1818–1893), Norwegian politician for the Liberal Party * Diderik Wagenaar (born 1946), Dutch composer and musical theorist *Didrik Pining Didrik Pining ( 1430 – 1491) was a German privateer, nobleman and governor of Iceland and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minerals
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2011): Minerals'; p. 1. In the series ''Geology: Landforms, Minerals, and Rocks''. Rosen Publishing Group. The geological definition of mineral normally excludes compounds that occur only in living organisms. However, some minerals are often biogenic (such as calcite) or are organic compounds in the sense of chemistry (such as mellite). Moreover, living organisms often synthesize inorganic minerals (such as hydroxylapatite) that also occur in rocks. The concept of mineral is distinct from rock, which is any bulk solid geologic material that is relatively homogeneous at a large enough scale. A rock may consist of one type of mineral, or may be an aggregate of two or more different types of minerals, spacially segregated into distinct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
