Amur Oblast ( / ə ˈ m ʊər ˈ ɒ b l æ s t / ) is a federal subject of Russia (an oblast ), located on the banks of the Amur and Zeya rivers in the Russian Far East . The oblast borders Heilongjiang province of the People's Republic of China (PRC) to the south.
94-614: The administrative center of the oblast, the city of Blagoveshchensk , is one of the oldest settlements in the far east of the country, founded in 1856. It is a traditional center of trade and gold mining . The territory is accessed by two railways: the Trans-Siberian Railway and the Baikal–Amur Mainline . As of the 2021 Census , the oblast's population was 766,912. Amur Krai ( Аму́рский край ) or Priamurye ( Приаму́рье 'Circum-Amur') were unofficial names for
188-465: A county town , or the place where the central administration of a commune , is located. In countries with French as administrative language (such as Belgium, Luxembourg, Switzerland and many African countries), a chef-lieu ( French pronunciation: [ʃɛfljø] , plural form chefs-lieux , literally 'chief place' or 'main place'), is a town or city that is important from an administrative perspective. The capital of an Algerian province
282-400: A département is known as the préfecture . This is the town or city where the prefect of the department (and all services under their control) are situated, in a building known as the prefecture . In every French region , one of the departments has pre-eminence over the others, and the prefect carries the title of Prefect of region X..., Prefect of Department Z... and the city where
376-642: A "High Council of Collectivites" seated at the nation's capital. Smaller sub-divisions in Mali's Communes (Villages, Tribal councils, Quarters) are administered from or identified as a Place / Site ( Site in French), so the chef-lieu is literally the Chief-Place even at the lowest level. In the Hashemite Kingdom of Jordan , the administrative centres are known as "chief towns" or nahias . Nahias may be in charge of
470-508: A 2012 survey 25.1% of the population of Amur Oblast adheres to the Russian Orthodox Church , 5% are unaffiliated generic Christians, 1% is an Orthodox believer without belonging to any church or adheres to other (non-Russian) Orthodox churches , and 1% is an adherent of Islam . In addition, 41% of the population declares to be "spiritual but not religious", 24% is atheist , and 2.9% follows other religions or did not give an answer to
564-631: A batch reactor with an inert atmosphere at a temperature of 1,000 °C. Dilute hydrochloric acid is then used to leach the salt from the product. The processing of titanium metal occurs in four major steps: reduction of titanium ore into "sponge", a porous form; melting of sponge, or sponge plus a master alloy to form an ingot; primary fabrication, where an ingot is converted into general mill products such as billet , bar, plate , sheet , strip, and tube ; and secondary fabrication of finished shapes from mill products. Because it cannot be readily produced by reduction of titanium dioxide, titanium metal
658-460: A carbon monoxide atmosphere with chlorine gas before reducing it to titanium metal by the use of sodium. Pure metallic titanium (99.9%) was first prepared in 1910 by Matthew A. Hunter at Rensselaer Polytechnic Institute by heating TiCl 4 with sodium at 700–800 °C (1,292–1,472 °F) under great pressure in a batch process known as the Hunter process . Titanium metal was not used outside
752-568: A central city as chef-lieu of delegation . In the United Kingdom it is the centre of a local authority , which is distinct from a historic county with a county town. Titanium Titanium is a chemical element ; it has symbol Ti and atomic number 22. Found in nature only as an oxide , it can be reduced to produce a lustrous transition metal with a silver color , low density , and high strength, resistant to corrosion in sea water , aqua regia , and chlorine . Titanium
846-687: A couple of dozen are readily available commercially. The ASTM International recognizes 31 grades of titanium metal and alloys, of which grades one through four are commercially pure (unalloyed). Those four vary in tensile strength as a function of oxygen content, with grade 1 being the most ductile (lowest tensile strength with an oxygen content of 0.18%), and grade 4 the least ductile (highest tensile strength with an oxygen content of 0.40%). The remaining grades are alloys, each designed for specific properties of ductility, strength, hardness, electrical resistivity, creep resistance, specific corrosion resistance, and combinations thereof. In addition to
940-574: A government subdivision include Senegal , Burkina Faso , Benin , Mali , and Niger . Taking Niger and Mali as examples, the administrative subdivisions down to the Commune level each have a formal place of administrative headquarters, titled the chef-lieu. The larger portion of the terminology of administrative division is inherited from colonial rule as part of French West Africa , and has survived and been somewhat modified over time. In both nations there have been remarkably parallel histories. With
1034-521: A host of other rare birds. Amur Oblast has considerable reserves of many types of mineral resources; proven reserves are estimated to be worth US$ 400 billion. Among the most important are gold (the largest reserves in Russia), silver, titanium , molybdenum , tungsten , copper, and tin . There are also an estimated 70 billion tons of bituminous coal and lignite reserves. Probable iron deposits are estimated to be 3.8 billion tons. The Garin deposit
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#17328448348461128-438: A mixture of oxides and deposits coatings with variable refractive index. Also known is Ti 2 O 3 , with the corundum structure, and TiO , with the rock salt structure , although often nonstoichiometric . The alkoxides of titanium(IV), prepared by treating TiCl 4 with alcohols , are colorless compounds that convert to the dioxide on reaction with water. They are industrially useful for depositing solid TiO 2 via
1222-434: A reducing agent in organic chemistry. Owing to the important role of titanium compounds as polymerization catalyst, compounds with Ti-C bonds have been intensively studied. The most common organotitanium complex is titanocene dichloride ((C 5 H 5 ) 2 TiCl 2 ). Related compounds include Tebbe's reagent and Petasis reagent . Titanium forms carbonyl complexes , e.g. (C 5 H 5 ) 2 Ti(CO) 2 . Following
1316-472: A sample of manaccanite and confirmed that it contained titanium. The currently known processes for extracting titanium from its various ores are laborious and costly; it is not possible to reduce the ore by heating with carbon (as in iron smelting) because titanium combines with the carbon to produce titanium carbide. An extraction of 95% pure titanium was achieved by Lars Fredrik Nilson and Otto Petterson . To achieve this they chlorinated titanium oxide in
1410-402: A sub-district ( qda ), a district ( liwa ), or a governorate ( muhafazah ). Luxembourg is divided into two judicial arrondissements (Luxembourg City, Diekirch), four electoral circonscriptions (constituencies), twelve cantons , as well as 100 communes (municipalities; Luxembourgish: Gemengen ). Arrondissements, districts and cantons have each a chef-lieu and are named after it. The same
1504-725: A variety of conditions, such as embrittlement , which reduce the integrity of the assembly welds and lead to joint failure. Titanium is very difficult to solder directly, and hence a solderable metal or alloy such as steel is coated on titanium prior to soldering. Titanium metal can be machined with the same equipment and the same processes as stainless steel . Common titanium alloys are made by reduction. For example, cuprotitanium (rutile with copper added), ferrocarbon titanium (ilmenite reduced with coke in an electric furnace), and manganotitanium (rutile with manganese or manganese oxides) are reduced. About fifty grades of titanium alloys are designed and currently used, although only
1598-731: Is Vasily Orlov . On 19 September 2021, elections to the Legislative Assembly of Amur Oblast were held. One self-nominee and seven parties entered the regional parliament: United Russia - 18 seats; the Communist Party of the Russian Federation - 3 seats; the Liberal Democratic Party of Russia , A Just Russia – For Truth , the Party of Pensioners , New People , and Communists of Russia - one each place. The Chairman of
1692-421: Is positron emission (with the exception of Ti which undergoes electron capture ), leading to isotopes of scandium , and the primary mode for isotopes heavier than Ti is beta emission , leading to isotopes of vanadium . Titanium becomes radioactive upon bombardment with deuterons , emitting mainly positrons and hard gamma rays . The +4 oxidation state dominates titanium chemistry, but compounds in
1786-472: Is 60% denser than aluminium, but more than twice as strong as the most commonly used 6061-T6 aluminium alloy . Certain titanium alloys (e.g., Beta C ) achieve tensile strengths of over 1,400 MPa (200,000 psi). However, titanium loses strength when heated above 430 °C (806 °F). Titanium is not as hard as some grades of heat-treated steel; it is non-magnetic and a poor conductor of heat and electricity. Machining requires precautions, because
1880-506: Is a term commonly ascribed to the settlement that serves as a municipal administrative centre. This level handles the local administrative and political tasks of the surrounding settlements. Since central place theory was the guiding principle during the municipal reform 1962–1977, most municipalities were dominated by a larger urban area where the political seat was located. Most municipalities are named for their central locality, but there are several exceptions. There are many deviations from
1974-473: Is about 4 picomolar in the ocean. At 100 °C, the concentration of titanium in water is estimated to be less than 10 M at pH 7. The identity of titanium species in aqueous solution remains unknown because of its low solubility and the lack of sensitive spectroscopic methods, although only the 4+ oxidation state is stable in air. No evidence exists for a biological role, although rare organisms are known to accumulate high concentrations of titanium. Titanium
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#17328448348462068-548: Is also considered one of the most biocompatible metals, leading to a range of medical applications including prostheses , orthopedic implants , dental implants , and surgical instruments . The two most useful properties of the metal are corrosion resistance and strength-to-density ratio , the highest of any metallic element. In its unalloyed condition, titanium is as strong as some steels , but less dense. There are two allotropic forms and five naturally occurring isotopes of this element, Ti through Ti, with Ti being
2162-496: Is also very hard, is found in cutting tools and coatings. Titanium tetrachloride (titanium(IV) chloride, TiCl 4 ) is a colorless volatile liquid (commercial samples are yellowish) that, in air, hydrolyzes with spectacular emission of white clouds. Via the Kroll process , TiCl 4 is used in the conversion of titanium ores to titanium metal. Titanium tetrachloride is also used to make titanium dioxide, e.g., for use in white paint. It
2256-845: Is an extremely rare mineral consisting of titanium dioxide. Of these minerals, only rutile and ilmenite have economic importance, yet even they are difficult to find in high concentrations. About 6.0 and 0.7 million tonnes of those minerals were mined in 2011, respectively. Significant titanium-bearing ilmenite deposits exist in Australia , Canada , China , India , Mozambique , New Zealand , Norway , Sierra Leone , South Africa , and Ukraine . About 210,000 tonnes of titanium metal sponge were produced in 2020, mostly in China (110,000 t), Japan (50,000 t), Russia (33,000 t) and Kazakhstan (15,000 t). Total reserves of anatase, ilmenite, and rutile are estimated to exceed 2 billion tonnes. The concentration of titanium
2350-539: Is called a chef-lieu . The capital of a district , the next largest division, is also called a chef-lieu , whilst the capital of the lowest division, the municipalities , is called agglomération de chef-lieu (chef-lieu agglomeration ) and is abbreviated as A.C.L. The chef-lieu in Belgium is the administrative centre of each of the ten provinces of Belgium . Three of these cities also give their name to their province ( Antwerp , Liège and Namur ). The chef-lieu of
2444-622: Is contained in meteorites , and it has been detected in the Sun and in M-type stars (the coolest type) with a surface temperature of 3,200 °C (5,790 °F). Rocks brought back from the Moon during the Apollo 17 mission are composed of 12.1% TiO 2 . Native titanium (pure metallic) is very rare. Naturally occurring titanium is composed of five stable isotopes : Ti, Ti, Ti, Ti, and Ti, with Ti being
2538-489: Is corroded by concentrated acids. Titanium is a very reactive metal that burns in normal air at lower temperatures than the melting point. Melting is possible only in an inert atmosphere or vacuum. At 550 °C (1,022 °F), it combines with chlorine. It also reacts with the other halogens and absorbs hydrogen. Titanium readily reacts with oxygen at 1,200 °C (2,190 °F) in air, and at 610 °C (1,130 °F) in pure oxygen, forming titanium dioxide . Titanium
2632-897: Is extracted from its principal mineral ores by the Kroll and Hunter processes. The most common compound, titanium dioxide , is a popular photocatalyst and is used in the manufacture of white pigments. Other compounds include titanium tetrachloride (TiCl 4 ), a component of smoke screens and catalysts ; and titanium trichloride (TiCl 3 ), which is used as a catalyst in the production of polypropylene . Titanium can be alloyed with iron , aluminium , vanadium , and molybdenum , among other elements. The resulting titanium alloys are strong, lightweight, and versatile, with applications including aerospace ( jet engines , missiles , and spacecraft ), military, industrial processes (chemicals and petrochemicals, desalination plants , pulp , and paper ), automotive, agriculture (farming), sporting goods, jewelry, and consumer electronics . Titanium
2726-529: Is fully explored and known to contain 389 million tons of iron ore. Estimated reserves of the deposit are 1,293 million tons. The deposit's ore contains a low concentration of detrimental impurities; the ore contains 69.9% iron. Amur Oblast is also a promising source of titanium , with the Bolshoy Seyim deposit being the most important. According to the Bei Shi (Dynastic History of Northern Dynasties) and
2820-406: Is heated to this transition temperature but then falls and remains fairly constant for the β form regardless of temperature. Like aluminium and magnesium , the surface of titanium metal and its alloys oxidize immediately upon exposure to air to form a thin non-porous passivation layer that protects the bulk metal from further oxidation or corrosion. When it first forms, this protective layer
2914-824: Is manufactured using a flow production process known as the Armstrong process that is similar to the batch production Hunter process . A stream of titanium tetrachloride gas is added to a stream of molten sodium; the products (sodium chloride salt and titanium particles) is filtered from the extra sodium. Titanium is then separated from the salt by water washing. Both sodium and chlorine are recycled to produce and process more titanium tetrachloride. Methods for electrolytic production of Ti metal from TiO 2 using molten salt electrolytes have been researched and tested at laboratory and small pilot plant scales. The lead author of an impartial review published in 2017 considered his own process "ready for scaling up." A 2023 review "discusses
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3008-426: Is not the case. It is paramagnetic and has fairly low electrical and thermal conductivity compared to other metals. Titanium is superconducting when cooled below its critical temperature of 0.49 K. Commercially pure (99.2% pure) grades of titanium have ultimate tensile strength of about 434 MPa (63,000 psi ), equal to that of common, low-grade steel alloys, but are less dense. Titanium
3102-553: Is obtained by reduction of titanium tetrachloride (TiCl 4 ) with magnesium metal in the Kroll process. The complexity of this batch production in the Kroll process explains the relatively high market value of titanium, despite the Kroll process being less expensive than the Hunter process. To produce the TiCl 4 required by the Kroll process, the dioxide is subjected to carbothermic reduction in
3196-511: Is one of the few elements that burns in pure nitrogen gas, reacting at 800 °C (1,470 °F) to form titanium nitride , which causes embrittlement. Because of its high reactivity with oxygen, nitrogen, and many other gases, titanium that is evaporated from filaments is the basis for titanium sublimation pumps , in which titanium serves as a scavenger for these gases by chemically binding to them. Such pumps inexpensively produce extremely low pressures in ultra-high vacuum systems. Titanium
3290-469: Is only 1–2 nm thick but it continues to grow slowly, reaching a thickness of 25 nm in four years. This layer gives titanium excellent resistance to corrosion against oxidizing acids, but it will dissolve in dilute hydrofluoric acid , hot hydrochloric acid, and hot sulfuric acid. Titanium is capable of withstanding attack by dilute sulfuric and hydrochloric acids at room temperature, chloride solutions, and most organic acids. However, titanium
3384-483: Is surrounded by six oxide ligands that link to other Ti centers. The term titanates usually refers to titanium(IV) compounds, as represented by barium titanate (BaTiO 3 ). With a perovskite structure, this material exhibits piezoelectric properties and is used as a transducer in the interconversion of sound and electricity . Many minerals are titanates, such as ilmenite (FeTiO 3 ). Star sapphires and rubies get their asterism (star-forming shine) from
3478-738: Is the Zeyskaya Hydroelectric Power Station with an installed capacity of 1,330 MW and a yearly output of 4.91 TWh. The station is owned by RusHydro . The company also owns the 2,010 MW Bureyskaya Hydroelectric Power Station , opened in 2009. Its annual output is 7.1 TWh. The Amur Region is the primary producer of soybean in Russia. By 1940, 65 thousand hectares of land in Amur had been cultivated with soybeans, and by 1972 soybean made up 592 thousand hectares of land in Amur, compared to 650 thousand hectares of soybean crops in
3572-664: Is the ninth-most abundant element in Earth 's crust (0.63% by mass ) and the seventh-most abundant metal. It is present as oxides in most igneous rocks , in sediments derived from them, in living things, and natural bodies of water. Of the 801 types of igneous rocks analyzed by the United States Geological Survey , 784 contained titanium. Its proportion in soils is approximately 0.5–1.5%. Common titanium-containing minerals are anatase , brookite , ilmenite , perovskite , rutile , and titanite (sphene). Akaogiite
3666-620: Is true for each commune which is composed of more than one town or village. Usually (with a few exceptions), the commune is named after the communal chef-lieu. In Russia , several million-plus cities in federal districts have the official status of an administrative centre: Moscow (as the main city of the Central Federal District ), Vladivostok , Volgograd , Yekaterinburg , Nizhny Novgorod , Novosibirsk , Pyatigorsk , Rostov-on-Don and St. Petersburg . The main cities of regions and municipal districts are also called unofficially
3760-471: Is used in steel as an alloying element ( ferro-titanium ) to reduce grain size and as a deoxidizer , and in stainless steel to reduce carbon content. Titanium is often alloyed with aluminium (to refine grain size), vanadium , copper (to harden), iron , manganese , molybdenum , and other metals. Titanium mill products (sheet, plate, bar, wire, forgings, castings) find application in industrial, aerospace, recreational, and emerging markets. Powdered titanium
3854-509: Is widely used in organic chemistry as a Lewis acid , for example in the Mukaiyama aldol condensation . In the van Arkel–de Boer process , titanium tetraiodide (TiI 4 ) is generated in the production of high purity titanium metal. Titanium(III) and titanium(II) also form stable chlorides. A notable example is titanium(III) chloride (TiCl 3 ), which is used as a catalyst for production of polyolefins (see Ziegler–Natta catalyst ) and
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3948-690: The Defense National Stockpile Center , until the stockpile was dispersed in the 2000s. As of 2021, the four leading producers of titanium sponge were China (52%), Japan (24%), Russia (16%) and Kazakhstan (7%). The Hunter process was the first industrial process to produce pure metallic titanium. It was invented in 1910 by Matthew A. Hunter , a chemist born in New Zealand who worked in the United States. The process involves reducing titanium tetrachloride (TiCl 4 ) with sodium (Na) in
4042-610: The Ezop , Yam-Alin and the Turan ranges stretching along the oblast's southeastern border with Khabarovsk Krai. Many rivers flow through the oblast, especially in the north, accounting for 75% of the hydropower resources in the Russian Far East . Most of the oblast is in the Amur's drainage basin , although the rivers in the northwest drain into the Lena and the rivers in the northeast drain into
4136-808: The Mongols , while the Duchers may have been a branch of the Jurchen people , later known as the Manchus . The area was conquered by the Manchus in 1639–1640, after defeating the Evenk Federation led by Bombogor . It was returned to the Qing dynasty in the Treaty of Nerchinsk with the Tsardom of Russia . The region was annexed by Russia in 1858 in the Treaty of Aigun between Russia and
4230-800: The Okhotsk Sea on the northeast. They brought tributary presents to the Tang court and disappeared at the dawn of the tenth century with the foundation of the Liao empire. Later, in the 13th century, the middle- Amur and the Zeya River basin area became the homeland of the Daurs and (further south) the Duchers . The ancestors of the Daurs are thought to be closely related to the Khitans and
4324-496: The Stockholm metropolitan area . The term central locality has no legal standing and it is unclear how it should be applied to these municipalities. Some municipalities appointing one or several localities to be the central locality. A residence city (Swedish: "residensstad") is the town or city which is the political and administrative seat of the county . This level handles the more regional political and administrative tasks of
4418-827: The Sui Shu (Chronicles of the Sui dynasty ), both Chinese records, this area belonged originally to the territory one of the five semi- nomadic Shiwei , the Bo Shiwei tribes ( Chinese : 钵室韋 ). Their settlements were located on the north of the Yilehuli Mountains in the upper reaches of the Nen River , south of the Stanovoy Range , west of the Bureya and the Malyi Khingan ranges and reaching
4512-498: The Uda . The longest rivers include the Amur, Bureya , Gilyuy , Nyukzha , Olyokma , Selemdzha , and Zeya . The Zeya begins in the mountains in the northeast, and its middle reaches are dammed to create the huge Zeya Reservoir , which sprawls over 2,400 square kilometers (930 sq mi). Climate is temperate continental, with cold, dry winters and hot, rainy summers. Average January temperatures vary from −24 °C (−11 °F) in
4606-502: The Västra Götaland Region . The term chef-lieu is applied to the capital of each Swiss canton . In 16 of the 26 cantons, the territory is subdivided into districts. Every district also has a location nominated as chef-lieu and each has a prefect. The term chef-lieu is used to designate the capital of each gouvernorat (department). Each of the 24 gouvernorats is subdivided into delegations (districts) which each have
4700-715: The Zeya Hydroelectric Power Plant (Zeiskaya GES), which still supplies electricity to most of the Far Eastern District. On 21 May 1998 Amur alongside Ivanovo , Kostroma , Voronezh Oblast , and the Mari El Republic signed a power-sharing agreement with the federal government, granting it autonomy. This agreement would be abolished on 18 March 2002. The largest urban localities of the oblast are Blagoveshchensk , Belogorsk , Svobodny , Tynda , and Raychikhinsk . The Governor of Amur Oblast since 2018
4794-572: The electrochemical principles involved in the recovery of metals from aqueous solutions and fused salt electrolytes", with particular attention paid to titanium. While some metals such as nickel and copper can be refined by electrowinning at room temperature, titanium must be in the molten state and "there is a strong chance of attack of the refractory lining by molten titanium." Zhang et al concluded their Perspective on Thermochemical and Electrochemical Processes for Titanium Metal Production in 2017 that "Even though there are strong interests in
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#17328448348464888-479: The sol-gel process . Titanium isopropoxide is used in the synthesis of chiral organic compounds via the Sharpless epoxidation . Titanium forms a variety of sulfides, but only TiS 2 has attracted significant interest. It adopts a layered structure and was used as a cathode in the development of lithium batteries . Because Ti(IV) is a "hard cation" , the sulfides of titanium are unstable and tend to hydrolyze to
4982-536: The sub-prefecture . The arrondissement where the département prefecture is located does not normally have a sub-prefect or sub-prefecture, the administration being devolved usually to the Secretary-general of the departmental prefecture , who functions as sub-prefect for the arrondissement. The chef-lieu of a canton is usually the biggest city or town within the canton, but has only a nominal role. No specific services are controlled by it. In past decades, there
5076-540: The +3 oxidation state are also numerous. Commonly, titanium adopts an octahedral coordination geometry in its complexes, but tetrahedral TiCl 4 is a notable exception. Because of its high oxidation state, titanium(IV) compounds exhibit a high degree of covalent bonding . The most important oxide is TiO 2 , which exists in three important polymorphs ; anatase, brookite, and rutile. All three are white diamagnetic solids, although mineral samples can appear dark (see rutile ). They adopt polymeric structures in which Ti
5170-460: The ASTM specifications, titanium alloys are also produced to meet aerospace and military specifications (SAE-AMS, MIL-T), ISO standards, and country-specific specifications, as well as proprietary end-user specifications for aerospace, military, medical, and industrial applications. Commercially pure flat product (sheet, plate) can be formed readily, but processing must take into account of the tendency of
5264-607: The Albyn, Malomir and Pokrovskiy mines in the region. There is a large site of uranium mining and processing facilities in Oktyabrsky , near the Russia–China border. There are plans to develop other mineral deposits as well, such as titanium, iron, copper, nickel, apatite, etc. Total coal production amounts to 3,398 tons. As of 2007, four coal deposits are being operated by the company OOO Amur Coal , and two more have been explored. In total,
5358-634: The East Siberian Krai and the Far Eastern Krai . The East Siberian Oblast was divided into Irkutsk Oblast and Chita Oblast in 1937 and the part of Amur within it became part of Chita Oblast. The Far Eastern Krai was divided into Khabarovsk Krai and Primorye Krai in 1938. The territory of Amur Oblast that was in Far Eastern Krai was included in Khabarovsk Krai . In 1948, Amur Oblast
5452-520: The Legislative Assembly is Konstantin Dyakonov . Population : 766,912 ( 2021 Census ) ; 830,103 ( 2010 Census ) ; 902,844 ( 2002 Census ) ; 1,057,781 ( 1989 Soviet census ) . Vital statistics for 2022: Total fertility rate (2022): 1.46 children per woman Life expectancy (2021): Total — 66.30 years (male — 61.75, female — 71.11) According to
5546-672: The Qing dynasty. Amur Oblast was established with its center in Blagoveshchensk . The region received its first influx of Russian settlers in the mid-seventeenth century. They were looking for a more temperate climate as an escape from the north. After the Opium War , when the Chinese Empire was exposed to the outside world, Russian explorers once again moved to the region (mostly Cossacks and peasant farmers). The last influx of people arrived upon
5640-625: The Russian territories by the Amur River used in the late Russian Empire that approximately correspond to modern Amur Oblast. Amur Oblast is located in the southeast of Russia, between Stanovoy Range in the north and the Amur River in the south, and borders with the Sakha Republic in the north, Khabarovsk Krai and the Jewish Autonomous Oblast in the east, Heilongjiang of China in
5734-430: The administrative centre or simply the centre. The only exception to this rule is the republics , for which the term " capital " is used to refer to the seat of government. The capital of Russia is also an entity to which the term "administrative centre" does not apply. In Sweden there are two levels of administrative centre; the local municipal and the regional county . Central locality ( Swedish : "centralort")
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#17328448348465828-537: The area would be the site of a new Vostochny Cosmodrome ("Eastern Spaceport"), to reduce Russian dependence on the Baikonur Cosmodrome in Kazakhstan. The first rocket launch from the site took place on 28 April 2016. [REDACTED] Media related to Amur Oblast at Wikimedia Commons Administrative center An administrative centre is a seat of regional administration or local government, or
5922-450: The central locality principle. Some municipalities are dominated by two or more towns of similar size, and sometimes they share the municipal administration, with the municipality having its official address in one of the towns. For example, both Skillingaryd and Vaggeryd are central localities of Vaggeryd Municipality . Conversely, there are municipalities within metropolitan areas . For example, there are twenty-six municipalities within
6016-628: The completion of the Trans-Siberian Railroad . In April 1920, the Far Eastern Republic , with its capital in Chita, was formed from Amur, Transbaikal, Kamchatka , Sakhalin , and Primorye regions as a democratic "buffer" state in order to avoid war with Japan. It existed until November 1922, when it joined the Russian SFSR . In January 1926, the territory of Amur Oblast was split between
6110-442: The county, such as healthcare and public transport . The name comes from that this is the town or city where the governor ( Swedish : "landshövding") have their residence . There are some exceptions to this, however. In the newer amalgamated "greater counties", often referred to as "regions", the administrative centre is placed in one of the older residence cities . Examples of this is Malmö in Region Scania and Gothenburg in
6204-416: The creation of potentially effective, selective, and stable titanium-based drugs. Titanium was discovered in 1791 by the clergyman and geologist William Gregor as an inclusion of a mineral in Cornwall , Great Britain. Gregor recognized the presence of a new element in ilmenite when he found black sand by a stream and noticed the sand was attracted by a magnet . Analyzing the sand, he determined
6298-434: The decentralization process begun in both nations in the 1990s, the chef-lieu has transitioned from the location of the Governor, Commandant, or Prefect and their staff, to the location of Commune, Cercles of Mali / Departments of Niger , and Regional Councils and a variety of decentralized bodies. The chefs-lieux of a Region, Cercle or Département, is usually also a Communal chef-lieu. Both nations collect these councils in
6392-401: The early 1950s, titanium came into use extensively in military aviation, particularly in high-performance jets, starting with aircraft such as the F-100 Super Sabre and Lockheed A-12 and SR-71 . Throughout the Cold War period, titanium was considered a strategic material by the U.S. government, and a large stockpile of titanium sponge (a porous form of the pure metal) was maintained by
6486-558: The industry for finding a better method to produce Ti metal, and a large number of new concepts and improvements have been investigated at the laboratory or even at pilot plant scales, there is no new process to date that can replace the Kroll process commercially." The Hydrogen assisted magnesiothermic reduction (HAMR) process uses titanium dihydride . All welding of titanium must be done in an inert atmosphere of argon or helium to shield it from contamination with atmospheric gases (oxygen, nitrogen, and hydrogen). Contamination causes
6580-460: The laboratory until 1932 when William Justin Kroll produced it by reducing titanium tetrachloride (TiCl 4 ) with calcium . Eight years later he refined this process with magnesium and with sodium in what became known as the Kroll process. Although research continues to seek cheaper and more efficient routes, such as the FFC Cambridge process , the Kroll process is still predominantly used for commercial production. Titanium of very high purity
6674-431: The material can gall unless sharp tools and proper cooling methods are used. Like steel structures, those made from titanium have a fatigue limit that guarantees longevity in some applications. The metal is a dimorphic allotrope of a hexagonal close packed α form that changes into a body-centered cubic (lattice) β form at 882 °C (1,620 °F). The specific heat of the α form increases dramatically as it
6768-503: The metal to springback . This is especially true of certain high-strength alloys. Exposure to the oxygen in air at the elevated temperatures used in forging results in formation of a brittle oxygen-rich metallic surface layer called " alpha case " that worsens the fatigue properties, so it must be removed by milling, etching, or electrochemical treatment. The working of titanium is very complicated, and may include Friction welding , cryo-forging , and Vacuum arc remelting . Titanium
6862-403: The most abundant (73.8%). As a metal , titanium is recognized for its high strength-to-weight ratio . It is a strong metal with low density that is quite ductile (especially in an oxygen -free environment), lustrous, and metallic-white in color . Due to its relatively high melting point (1,668 °C or 3,034 °F) it has sometimes been described as a refractory metal , but this
6956-507: The most abundant (73.8% natural abundance ). At least 21 radioisotopes have been characterized, the most stable of which are Ti with a half-life of 63 years; Ti, 184.8 minutes; Ti, 5.76 minutes; and Ti, 1.7 minutes. All other radioactive isotopes have half-lives less than 33 seconds, with the majority less than half a second. The isotopes of titanium range in atomic weight from 39.002 Da ( Ti) to 63.999 Da ( Ti). The primary decay mode for isotopes lighter than Ti
7050-525: The name of the town. For the towns of the mainland, the chef-lieu has the same name as the town. Nouméa is a town composed only of Nouméa. Many of the West African states which gained independence from France in the mid-20th century also inherited the French administrative structure of Departments and Communes, headed by a Chief-Lieu . States still using Chief-Lieu to identify the administrative headquarters of
7144-403: The oblast include OAO Svobodny Railroad Car Repair Plant , OAO Blagoveshchensk October Revolution Ship Building Plant and OAO Bureya-Kran . Mining and quarrying amounted to 19.9% of industrial output in 2007. Amur Oblast ranks sixth in Russia for gold mining, and has the largest gold reserves in the country. The largest gold mine in the region is Pioneer, part of Petropavlovsk PLC who also own
7238-399: The oblast is estimated to have over 90 deposits of lignite and black coal, with overall reserves of 70 billion tons. In addition, fuel extraction amounted to 2.9% of industrial output. Amur Oblast enjoys an energy surplus: its energy consumption in 2007 was 6.9 TWh, while production was 9.3 TWh. Electricity output in 2007 was 9.9 TWh. The most important electricity producer
7332-526: The oxide with release of hydrogen sulfide . Titanium nitride (TiN) is a refractory solid exhibiting extreme hardness, thermal/electrical conductivity, and a high melting point. TiN has a hardness equivalent to sapphire and carborundum (9.0 on the Mohs scale ), and is often used to coat cutting tools, such as drill bits . It is also used as a gold-colored decorative finish and as a barrier layer in semiconductor fabrication . Titanium carbide (TiC), which
7426-806: The past the harvested soybean was shipped west, in recent years due to increased Chinese demands multiple soybean oil plants have opened in the region. In 2019, Chinese companies owned or leased some 100 thousand hectares out of the 1.3 million hectares of farmland. The oblast's main foreign exports are raw timber (1,172,900 cubic meters going to China, North Korea, Japan, Kazakhstan and Ukraine), metal goods (68,300 tons to China and Kazakhstan), and machinery, equipment and transport (12,300 tons to China, Japan, South Korea, Kazakhstan and Ukraine.) Main foreign imports are food and beverages from China, Kazakhstan, Uzbekistan and Philippines; textiles and footwear from China; and machinery and equipment from Ukraine and Japan. In July 2010, Prime Minister Vladimir Putin announced that
7520-475: The presence of chlorine . In this process, the chlorine gas is passed over a red-hot mixture of rutile or ilmenite in the presence of carbon. After extensive purification by fractional distillation , the TiCl 4 is reduced with 800 °C (1,470 °F) molten magnesium in an argon atmosphere. The van Arkel–de Boer process was the first semi-industrial process for pure Titanium. It involves thermal decomposition of titanium tetraiodide . Titanium powder
7614-505: The presence of titanium dioxide impurities. A variety of reduced oxides ( suboxides ) of titanium are known, mainly reduced stoichiometries of titanium dioxide obtained by atmospheric plasma spraying . Ti 3 O 5 , described as a Ti(IV)-Ti(III) species, is a purple semiconductor produced by reduction of TiO 2 with hydrogen at high temperatures, and is used industrially when surfaces need to be vapor-coated with titanium dioxide: it evaporates as pure TiO, whereas TiO 2 evaporates as
7708-440: The presence of two metal oxides: iron oxide (explaining the attraction to the magnet) and 45.25% of a white metallic oxide he could not identify. Realizing that the unidentified oxide contained a metal that did not match any known element, in 1791 Gregor reported his findings in both German and French science journals: Crell's Annalen and Observations et Mémoires sur la Physique . He named this oxide manaccanite . Around
7802-646: The question. Gross regional product per capita in 2007 was 131,039.60 rubles , while the national average was 198,817 rubles. The industrial section contributes 18.3% to the total GRP. The most important industrial sector in 2007 was manufacturing, constituting 25.7% of the industrial output. The sector is dominated by food products and beverages, which constitute 13% of industrial output. Machine building includes shipbuilding machinery, lifting and transport vehicles, mining equipment, agricultural machinery, metal assemblies and goods, electrical appliances and electrical machines and tools. The largest engineering companies in
7896-416: The regional prefect is found is known as chef-lieu of the region or, more commonly, Regional prefecture . The services are, however, controlled by the prefecture of the department. The chef-lieu of an arrondissement , commonly known as the sous-préfecture is the city or town where the sub-prefect of the arrondissement (and the services directly under their control) are situated, in a building called
7990-734: The same time, Franz-Joseph Müller von Reichenstein produced a similar substance, but could not identify it. The oxide was independently rediscovered in 1795 by Prussian chemist Martin Heinrich Klaproth in rutile from Boinik (the German name of Bajmócska), a village in Hungary (now Bojničky in Slovakia). Klaproth found that it contained a new element and named it for the Titans of Greek mythology . After hearing about Gregor's earlier discovery, he obtained
8084-450: The south to −33 °C (−27 °F) in the north. Average July temperatures are +21 °C (70 °F) in the south and +18 °C (64 °F) in the north. Annual precipitation is about 850 millimeters (33 in). Dwarf Siberian pine and alpine tundra grow at higher elevations and larch forests with small stands of flat-leaved birch and pine forests grow alongside the river plains. These larch and fir - spruce forests form
8178-536: The south, and with Zabaykalsky Krai in the west. The Stanovoy Range forms the dividing line between the Sakha Republic and Amur Oblast and spreads across the oblast's entire northern border. The Amur–Zeya and Zeya–Bureya Plains cover about 40% of the oblast's territory, but the rest is hilly. Several mountain ranges rise to the south of Stanovoy Range, including the Selemdzha Range parallel to it, as well as
8272-517: The success of platinum-based chemotherapy, titanium(IV) complexes were among the first non-platinum compounds to be tested for cancer treatment. The advantage of titanium compounds lies in their high efficacy and low toxicity in vivo . In biological environments, hydrolysis leads to the safe and inert titanium dioxide. Despite these advantages the first candidate compounds failed clinical trials due to insufficient efficacy to toxicity ratios and formulation complications. Further development resulted in
8366-716: The watershed of the Selemdzha River. The Bureya and Arkhara Rivers, southeast of the Selemdza, have the richest remaining forests in the oblast with Korean pine , Schisandra chinensis , Mongolian Oak , and other Manchurian flora. The Zeya–Bureya Plain, located between the Zeya, Amur, and Bureya Rivers, has the highest biodiversity in Amur Oblast. Much of this plain has been burned for agriculture, but large patches still remain. Japanese Daurian and Far Eastern western cranes nest here, as well as
8460-610: The whole of the USSR. During the Soviet period, this made up a significant proportion of the economy of Far Eastern Russia. By 2019, the Amur Region's share of Russian soybean production had declined to 28 percent due to increased cultivation of soybean in other regions, though it still remains Russia's largest soybean producer. The region in 2019 produced approximately 1 million tonnes of soybean, many of which are exported to neighboring China. While in
8554-487: Was always a Gendarmerie , a treasurer and a justice of the peace. The chef-lieu indicates the principal city of the provinces of New Caledonia. So Nouméa is the chef-lieu of South Province. But the chef-lieu can also mean the principal area within a town. So Wé is part of the town of Lifou , but is the chef-lieu of Lifou. In the Loyalty Islands and the other islands, the name of the chef-lieu differs from that of
8648-465: Was discovered in Cornwall , Great Britain , by William Gregor in 1791 and was named by Martin Heinrich Klaproth after the Titans of Greek mythology . The element occurs within a number of minerals , principally rutile and ilmenite , which are widely distributed in the Earth's crust and lithosphere ; it is found in almost all living things, as well as bodies of water, rocks, and soils. The metal
8742-493: Was finally separated from Khabarovsk Krai and Chita Oblast to become an independent region of the RSFSR. Rapid economic growth based on gold production began at that time, and living standards improved with the arrival of young specialists. As the Far Eastern District expanded, the demand for services such as electric power and housing also increased, which stimulated a new round of construction projects. New cities were built, along with
8836-527: Was made in small quantities when Anton Eduard van Arkel and Jan Hendrik de Boer discovered the iodide process in 1925, by reacting with iodine and decomposing the formed vapors over a hot filament to pure metal. In the 1950s and 1960s, the Soviet Union pioneered the use of titanium in military and submarine applications ( Alfa class and Mike class ) as part of programs related to the Cold War. Starting in
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