|
Duxit
Duxite is a mostly black-brown fossil resin from Miocenes lignite layers in the northern Bohemia. The resin is first mentioned in 1874 by Christian Dölter.C. Doelter: ''Harz aus der Braunkohle von Dux.'' – In: ''Verh. Geol. Reichsanstalt'', 17. März 1874: P. 145-146, Wien 1874. It is named after the small Czech town of Duchcov (German: Dux) in northern Bohemia, where it was found in the lignite mining Emeran. Not far from Duchcov, duxite has been found since the 1980s in a lignite workhouse at Bílina. In the lower section of the mined here lignite occur grade category tree residues with duxite. Mostly it involves Taxodium. Properties Cornelio Doelter reported the following composition for the samples which were extracted in 1874 (air-dry basis): 78.25% carbon, 8.14% hydrogen, 13.19% oxygen and 0.42% sulfur. The specific gravity was determined 1.133. The sample was in alcohol sparingly soluble in benzene. Doelter noted a certain similarity of the analyzed sample resin to Walchow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bitumen
Bitumen ( , ) is an immensely viscosity, viscous constituent of petroleum. Depending on its exact composition, it can be a sticky, black liquid or an apparently solid mass that behaves as a liquid over very large time scales. In American English, the material is commonly referred to as asphalt or tar. Whether found in natural deposits or refined from petroleum, the substance is classed as a pitch (resin), pitch. Prior to the 20th century, the term asphaltum was in general use. The word derives from the Ancient Greek word (), which referred to natural bitumen or pitch. The largest natural deposit of bitumen in the world is the Pitch Lake of southwest Trinidad, which is estimated to contain 10 million tons. About 70% of annual bitumen production is destined for road surface, road construction, its primary use. In this application, bitumen is used to bind construction aggregate, aggregate particles like gravel and forms a substance referred to as asphalt concrete, which is collo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resin
A resin is a solid or highly viscous liquid that can be converted into a polymer. Resins may be biological or synthetic in origin, but are typically harvested from plants. Resins are mixtures of organic compounds, predominantly terpenes. Common resins include amber, hashish, frankincense, myrrh and the animal-derived resin, shellac. Resins are used in varnishes, adhesives, food additives, incenses and perfumes. Resins protect plants from insects and pathogens, and are secreted in response to injury. Resins repel herbivores, insects, and pathogens, while the volatile natural phenol, phenolic compounds may attract benefactors such as predators of insects that attack the plant. Composition Most plant resins are composed of terpenes. Specific components are alpha-Pinene, alpha-pinene, pinene, beta-pinene, carene, delta-3 carene, and sabinene, the monocyclic terpenes limonene and terpinolene, and smaller amounts of the tricyclic sesquiterpenes, longifolene, caryophyllene, and cad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene followed the Oligocene and preceded the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from the warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and Ape, hominoids into Eurasia. During the late Miocene, the conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lignite
Lignite (derived from Latin ''lignum'' meaning 'wood'), often referred to as brown coal, is a soft, brown, combustible sedimentary rock formed from naturally compressed peat. It has a carbon content around 25–35% and is considered the lowest rank of coal due to its relatively low heat content. When removed from the ground, it contains a very high amount of moisture, which partially explains its low carbon content. Lignite is mined all around the world and is used almost exclusively as a fuel for steam-electric power generation. Lignite combustion produces less heat for the amount of carbon dioxide and sulfur released than other ranks of coal. As a result, lignite is the most harmful coal to human health. Depending on the source, various toxic heavy metals, including naturally occurring radioactive materials, may be present in lignite and left over in the coal fly ash produced from its combustion, further increasing health risks. Characteristics Lignite is brownish-bl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bohemia
Bohemia ( ; ; ) is the westernmost and largest historical region of the Czech Republic. In a narrow, geographic sense, it roughly encompasses the territories of present-day Czechia that fall within the Elbe River's drainage basin, but historically it could also refer to a wider area consisting of the Lands of the Bohemian Crown ruled by the List of Bohemian monarchs, Bohemian kings, including Moravia and Czech Silesia, in which case the smaller region is referred to as Bohemia Proper as a means of distinction. Bohemia became a part of Great Moravia, and then an independent principality, which became a Kingdom of Bohemia, kingdom in the Holy Roman Empire. This subsequently became a part of the Habsburg monarchy and the Austrian Empire. After World War I and the establishment of an History of Czechoslovakia (1918–1938), independent Czechoslovak state, the whole of Bohemia became a part of Czechoslovakia, defying claims of the German-speaking inhabitants that regions with German ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duchcov
Duchcov (; ) is a town in Teplice District in the Ústí nad Labem Region of the Czech Republic. It has about 8,700 inhabitants. Duchcov is known for the Duchcov Castle. The historic town centre with the castle complex is well preserved and is protected as an urban monument zone. Geography Duchcov is located about southwest of Teplice and southwest of Ústí nad Labem. It lies in the Most Basin. The stream Loučeňský potok flows through the town. The town is surrounded by several fishponds and artificial lakes. History The first written mention of Duchcov is from 1207, referring to the older name Hrabišín. The name of Duchcov is first mentioned in 1240. In the 14th century, Duchcov was a serf town surrounded by walls with three gates. In these times, the Romanesque Church of St. George and the Dominican monastery were in the town. At the turn of the 15th and 16th centuries, Duchcov became the seat of the estate owners, the Kaplíř of Sulevice family, and in the 16th centu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bílina
Bílina (; ) is a town in Teplice District in the Ústí nad Labem Region of the Czech Republic. It has about 14,000 inhabitants. It is known for its destination spa, spas and as a source of the strongly mineralized water, Bílinská kyselka. The historic town centre is well preserved and is protected as an Cultural monument (Czech Republic)#Monument zones, urban monument zone. Administrative division Bílina consists of six municipal parts (in brackets population according to the 2021 census): *Bílina (537) *Chudeřice (7) *Mostecké Předměstí (954) *Pražské Předměstí (2,230) *Teplické Předměstí (8,418) *Újezdské Předměstí (1,958) Etymology The name of the town originates from the adjective ''bílý'' (''bielý'' in Czech language#Medieval/Old Czech, Old Czech), meaning 'white'. The term ''Bielina'' ('white/bald place') is etymologically derived either from fact there was an area without any wood or from sparkling waters of the Bílina river (formerly called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxodium
''Taxodium'' is a genus of one to three species (depending on taxonomic opinion) of extremely flood-tolerant conifers in the cypress family, Cupressaceae. The name is derived from the Latin word ''taxus'', meaning " yew", and the Greek word ''εἶδος'' (''eidos''), meaning "similar to." Within the family, ''Taxodium'' is most closely related to Chinese swamp cypress (''Glyptostrobus pensilis'') and sugi (''Cryptomeria japonica''). Species of ''Taxodium'' occur in the southern part of the North American continent and are deciduous in the north and semi-evergreen to evergreen in the south. They are large trees, reaching tall and (exceptionally ) trunk diameter. The needle-like leaves, long, are borne spirally on the shoots, twisted at the base so as to appear in two flat rows on either side of the shoot. The cones are globose, diameter, with 10–25 scales, each scale with one or two seeds; they are mature in 7–9 months after pollination, when they disintegrate to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornelio Doelter
Cornelio August Severinus Doelter, Doelter y Cisterich or Cisterich y de la Torre (16 September 1850 – 8 August 1930) was a Caribbean-born Austrian geologist who specialized in chemical mineralogy and petrology, serving as a professor at the University of Graz, Universities of Graz and Vienna. He conducted pioneering experiments in synthetic mineralogy and petrology by melting down rocks and allowing recrystallization of mineral constituents. Life and work Doelter was born in Arroyo, Puerto Rico, Arroyo, Puerto Rico, where his father Carl August managed sugar and coffee plantations that originally belonging to his wife Francisca Maria de Cisterich y de la Torre. His mother was Spanish and his name was originally given as Doelter y Cisterich. The family moved to Karlsruhe in 1855 where Doelter studied at the Lyceum from 1860. From 1865 he studied at the Lycée St. Louis and the Lycée Bonaparte before joining the École Centrale Paris, École Centrale des Arts et Manufactures in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethanol
Ethanol (also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound with the chemical formula . It is an Alcohol (chemistry), alcohol, with its formula also written as , or EtOH, where Et is the pseudoelement symbol for ethyl group, ethyl. Ethanol is a Volatility (chemistry), volatile, flammable, colorless liquid with a characteristic wine-like odor and pungent taste. As a psychoactive depressant, it is the active ingredient in alcoholic beverages, and the second most consumed drug globally behind caffeine. Ethanol is naturally produced by the fermentation process of sugars by yeasts or via petrochemical processes such as ethylene hydration. Historically it was used as a general anesthetic, and has modern medical applications as an antiseptic, disinfectant, solvent for some medications, and antidote for methanol poisoning and ethylene glycol poisoning. It is used as a chemical solvent and in the Chemical synthesis, synthesis of orga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benzene
Benzene is an Organic compound, organic chemical compound with the Chemical formula#Molecular formula, molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar hexagonal Ring (chemistry), ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atoms, benzene is classed as a hydrocarbon. Benzene is a natural constituent of petroleum and is one of the elementary petrochemicals. Due to the cyclic continuous pi bonds between the carbon atoms, benzene is classed as an aromatic hydrocarbon. Benzene is a colorless and highly Combustibility and flammability, flammable liquid with a sweet smell, and is partially responsible for the aroma of gasoline. It is used primarily as a Precursor (chemistry), precursor to the manufacture of chemicals with more complex structures, such as ethylbenzene and cumene, of which billions of kilograms are produced annually. Although benzene is a major Chemical industry, industrial che ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Retinite
Retinite is resin, particularly from beds of brown coal which are near amber in appearance, but contain little or no succinic acid Succinic acid () is a dicarboxylic acid with the chemical formula (CH2)2(CO2H)2. In living organisms, succinic acid takes the form of an anion, succinate, which has multiple biological roles as a metabolic intermediate being converted into fum .... It may conveniently serve as a generic name, since no two independent occurrences prove to be alike, and the indefinite multiplication of names, no one of them properly specific, is not to be desired. Retinite resins contain no succinic acid and oxygen from 6% to 15%. References {{mineral-stub Resins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
