Dushanbe vs Cobalt

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Dushanbe (Tajik: Душанбе, IPA: [duʃæmˈbe]; significance Monday in Persian) is the capital and largest city of Tajikistan. As of January 2020, Dushanbe had a population of 863,400 and as of 2010 that population was largely Tajik. Until 1929, the town was known in Russian as Dyushambe (Russian: Дюшамбе, Dyushambe), and from 1929 to 1961 as Stalinabad (Tajik: Сталинобод, Stalinobod), after Joseph Stalin. Dushanbe is located in the Gissar valley, bounded by the Gissar Range in the north and east and the Babatag, Aktau, Rangontau and Karatau mountains in the south, and has an altitude of 750--900 m. The town is divided into four districts, all named after historical figures: Ismail Samani, Avicenna, Ferdowsi, and Shah Mansur. In ancient times, what is currently or is near modern Dushanbe was settled by different empires and individuals, including Mousterian tool-users, various neolithic cultures, the Achaemenid Empire, Greco-Bactria, the Kushan Empire, and the Hephalites. In the Middle Ages, more settlements started near modern-day Dushanbe such as Hulbuk and its famous palace. In the 17th century to the early 20th, Dushanbe started to grow into a market village controlled at times by the Beg of Hisor, Balkh, and eventually Bukhara. Soon after the Russian invasion in 1922, the city was made the capital of the Tajik Autonomous Soviet Socialist Republic in 1924, which initiated Dushanbe's development and rapid population growth that lasted until the Tajik Civil War. Following the war, the city became capital of an independent Tajikistan and continued its growth and development into a modern city which now is home to many international conventions. Dushanbe's modern culture had its beginnings in the 1920s, where Soviet music, cinema, theatre, sculpture, film, and sports all started.

Music, primarily shashmaqam before the Soviet invasion, took off in the city as a result of Russian influence and local opera houses and symphonies. Tajik figures like Sadriddin Ayni contributed greatly to the development of Dushanbe's literature, which went through many changes during and after the Soviet period. Theater and movie both saw their infancy in the 1930s and were heavily influenced by Soviet tendencies. The design of Dushanbe, once neoclassical, transitioned to a minimalist and eventually modern style. The town is a centre for newspapers, radio stations, and television of the nation, with almost 200 newspapers and over a dozen television studios working in 1999. A lot of Dushanbe's education system dates from Soviet times and has a legacy of state control; even now, the greatest university in Dushanbe, the Tajik National University, is funded by the government. Dushanbe International Airport is the principal airport serving the city. Other forms of transport include the trolleybus system dating from 1955, the small rail system, and the streets that traverse the city. Dushanbe's electricity is primarily hydroelectric, produced from the Nurek Dam, and the aging water system dates from 1932. Tajikistan's health care system is concentrated in Dushanbe, meaning that the major hospitals of the country are in the city. The city constitutes 20 percent of Tajikistan's GDP and has large industrial, financial, retail, and tourism businesses. Parks and main areas of the city include Victory Park, Rudaki Park, the Tajikistan National Museum, the Dushanbe Flagpole, and the Tajikistan National Museum of Antiquities.

Source: Wikipedia

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Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Cobalt-based blue pigments (cobalt blue) have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass, but the color was later thought to be due to the known metal bismuth. Miners had long used the name kobold ore (German for goblin ore) for some of the blue-pigment-producing minerals; they were so named because they were poor in known metals, and gave poisonous arsenic-containing fumes when smelted. In 1735, such ores were found to be reducible to a new metal (the first discovered since ancient times), and this was ultimately named for the kobold. Today, some cobalt is produced specifically from one of a number of metallic-lustered ores, such as cobaltite (CoAsS). The element is, however, more usually produced as a by-product of copper and nickel mining.

The copper belt in the Democratic Republic of the Congo (DRC) and Zambia yields most of the global cobalt production. World production in 2016 was 116,000 metric tons (114,000 long tons; 128,000 short tons) (according to Natural Resources Canada), and the DRC alone accounted for more than 50%.Cobalt is primarily used in lithium-ion batteries, and in the manufacture of magnetic, wear-resistant and high-strength alloys. The compounds cobalt silicate and cobalt(II) aluminate (CoAl2O4, cobalt blue) give a distinctive deep blue color to glass, ceramics, inks, paints and varnishes. Cobalt occurs naturally as only one stable isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high-energy gamma rays. Cobalt is the active center of a group of coenzymes called cobalamins. Vitamin B12, the best-known example of the type, is an essential vitamin for all animals. Cobalt in inorganic form is also a micronutrient for bacteria, algae, and fungi.

Source: Wikipedia