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Aleksandr Voskresensky
Aleksandr Abramovich Voskresensky (Russian: Александр Абрамович Воскресенский; 25 November 1808 – 21 January 1880) was a Russian chemist who served as rector of Saint Petersburg Imperial University in 1861–1863 and 1865–1867. Dmitri Mendeleev regarded him as a "grandfather of Russian chemistry". One of his major scientific achievements is the discovery of theobromine, the major alkaloid of cacao beans. Biography Voskresensky was born to a family of a poor priest, who died in 1814. He had one sister and one brother. From early ages he showed talents for sciences, and, after graduating from the St. Petersburg Institute of Pedagogy in 1836, was sent to Germany to continue his education. There he attended courses of Eilhard Mitscherlich, Heinrich Rose and Justus von Liebig, who considered Voskresensky one his most talented students. With Liebig he started his own chemical research. After returning to Russia in 1838 he was appointed as assistant t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torzhok
Torzhok (russian: Торжо́к) is a town in Tver Oblast, Russia, located on the Tvertsa River along the federal highway M10 and a branch of the Oktyabrskaya Railway division of the Russian Railways. The town is famous for its folk craft of goldwork embroidery. Population: History Torzhok was first mentioned in a chronicle in 1139 as Novy Torg. The Mongols burned it in 1238, but did not proceed northward to Novgorod. At that time, the town commanded the only route whereby grain was delivered to Novgorod. Once Torzhok blocked the route, a great shortage of grain and famine in Novgorod would follow. Consequently, Torzhok was known as a key to the Novgorod Republic and frequently changed hands during feudal internecine wars. The town was incorporated into the Grand Duchy of Moscow with the rest of the Novgorod Republic in 1478. The armies of a Sigmund the III of Poland frequently ravaged it during the Time of Troubles. During the imperial period, Torzhok was known as an imp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinrich Rose
Heinrich Rose (6 August 1795 – 27 January 1864) was a German mineralogist and analytical chemist. He was the brother of the mineralogist Gustav Rose and a son of Valentin Rose. Rose's early works on phosphorescence were noted in the Quarterly Journal of Science in 1821, and on the strength of these works, he was elected privatdozent at the University of Berlin from 1822, then Professor from 1832. In 1846 Rose rediscovered the chemical element niobium, proving conclusively that it was different from tantalum. This confirmed that Charles Hatchett had discovered niobium in 1801 in columbite ore. Hatchett had named the new element "columbium", from the ore in which niobium and tantalum coexist. The element was eventually assigned the name niobium by the IUPAC in 1950 after Niobe, the daughter of Tantalus in Greek mythology. In 1845 Rose published the discovery of a new element pelopium, which he had found in the mineral tantalite. After subsequent research pelopium was ident ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemists From The Russian Empire
A chemist (from Greek ''chēm(ía)'' alchemy; replacing ''chymist'' from Medieval Latin ''alchemist'') is a scientist trained in the study of chemistry. Chemists study the composition of matter and its properties. Chemists carefully describe the properties they study in terms of quantities, with detail on the level of molecules and their component atoms. Chemists carefully measure substance proportions, chemical reaction rates, and other chemical properties. In Commonwealth English, pharmacists are often called chemists. Chemists use their knowledge to learn the composition and properties of unfamiliar substances, as well as to reproduce and synthesize large quantities of useful naturally occurring substances and create new artificial substances and useful processes. Chemists may specialize in any number of subdisciplines of chemistry. Materials scientists and metallurgists share much of the same education and skills with chemists. The work of chemists is often related to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Torzhok
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1880 Deaths
Year 188 (CLXXXVIII) was a leap year starting on Monday of the Julian calendar. At the time, it was known in the Roman Empire as the Year of the Consulship of Fuscianus and Silanus (or, less frequently, year 941 ''Ab urbe condita''). The denomination 188 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Publius Helvius Pertinax becomes pro-consul of Africa from 188 to 189. Japan * Queen Himiko (or Shingi Waō) begins her reign in Japan (until 248). Births * April 4 – Caracalla (or Antoninus), Roman emperor (d. 217) * Lu Ji (or Gongji), Chinese official and politician (d. 219) * Sun Shao, Chinese general of the Eastern Wu state (d. 241) Deaths * March 17 – Julian, pope and patriarch of Alexandria * Fa Zhen (or Gaoqing), Chinese scholar (b. AD 100) * Lucius Antistius Burrus, Roman politician (executed) * Ma Xiang, Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1808 Births
Eighteen or 18 may refer to: * 18 (number), the natural number following 17 and preceding 19 * one of the years 18 BC, AD 18, 1918, 2018 Film, television and entertainment * ''18'' (film), a 1993 Taiwanese experimental film based on the short story ''God's Dice'' * ''Eighteen'' (film), a 2005 Canadian dramatic feature film * 18 (British Board of Film Classification), a film rating in the United Kingdom, also used in Ireland by the Irish Film Classification Office * 18 (''Dragon Ball''), a character in the ''Dragon Ball'' franchise * "Eighteen", a 2006 episode of the animated television series ''12 oz. Mouse'' Music Albums * ''18'' (Moby album), 2002 * ''18'' (Nana Kitade album), 2005 * '' 18...'', 2009 debut album by G.E.M. Songs * "18" (5 Seconds of Summer song), from their 2014 eponymous debut album * "18" (One Direction song), from their 2014 studio album ''Four'' * "18", by Anarbor from their 2013 studio album '' Burnout'' * "I'm Eighteen", by Alice Cooper common ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brockhaus And Efron Encyclopedic Dictionary
The ''Brockhaus and Efron Encyclopaedic Dictionary'' (Russian: Энциклопедический словарь Брокгауза и Ефрона, abbr. ЭСБЕ, tr. ; 35 volumes, small; 86 volumes, large) is a comprehensive multi-volume encyclopaedia in Russian. It contains 121,240 articles, 7,800 images, and 235 maps. It was published in Imperial Russia in 1890–1907, as a joint venture of Leipzig and St Petersburg publishers. The articles were written by the prominent Russian scholars of the period, such as Dmitri Mendeleev and Vladimir Solovyov. Reprints have appeared following the dissolution of the Soviet Union. History In 1889, the owner of one of the St. Petersburg printing houses, Ilya Abramovich Efron, at the initiative of Semyon Afanasyevich Vengerov, entered into an agreement with the German publishing house F. A. Brockhaus for the translation into Russian of the large German encyclopaedic dictionary ( de) into Russian as , published by the same publishin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kharkiv
Kharkiv ( uk, wikt:Харків, Ха́рків, ), also known as Kharkov (russian: Харькoв, ), is the second-largest List of cities in Ukraine, city and List of hromadas of Ukraine, municipality in Ukraine.Kharkiv "never had eastern-western conflicts" ''Euronews'' (23 October 2014) Located in the northeast of the country, it is the largest city of the historic Sloboda Ukraine, Slobozhanshchyna region. Kharkiv is the administrative centre of Kharkiv Oblast and of the surrounding Kharkiv Raion. The latest population is Kharkiv was founded in 1654 as Kharkiv fortress, and after these humble beginnings, it grew to be a major centre of industry, trade and Ukrainian culture in the Russian Empire. At the beginning of the 20th century, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nikolai Menshutkin
Nikolai Aleksandrovich Menshutkin (russian: Николай Александрович Меншуткин; – ) was a Russian chemist who discovered the process of converting a tertiary amine to a quaternary ammonium salt via the reaction with an alkyl halide, now known as the Menshutkin reaction. Biography Menshutkin was born in a merchant family as the sixth son of Alexander Nikolaevitch Menshutkin. He graduated with honors from gymnasium in December 1857, but only by autumn 1858 managed to enroll to the Saint Petersburg State University, as he was still under the prescribed age of 16. He studied at the faculty of physics and mathematics and was nearly expelled in the autumn of 1861 due to some political disturbances. Nevertheless, by the spring of 1862 he attained the master's degree. During the last years he became interested in chemistry, which he studied under Dmitri Mendeleev. While he acquired a sufficient knowledge of theory he was lacking practice, as at that time the en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nikolay Beketov
Nikolay Nikolayevich Beketov (russian: Николай Николаевич Бекетов; , Alferovka (now Beketovka), Penza Governorate, Russian Empire – , St. Petersburg, Russian Empire) was a Russian Imperial physical chemist and metallurgist. He was the father of a well-known Russian architect Alexei Beketov. Life and work In 1849, Beketov graduated from Kazan University and worked with Nikolay Zinin. In 1855, he became a junior scientific assistant in the Department of Chemistry at Kharkov University. In 1859–1887, Beketov was a professor at the same university. In 1865, he defended his PhD thesis on "Research into the phenomenon of displacement of one element by another" ("russian: Исследования над явлениями вытеснения одних металлов другими"). In 1886, Beketov moved to Saint Petersburg, where he worked at the academic chemical laboratory and taught at the University for Women. In 1890, Beketov delivered lecture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quinic Acid
Quinic acid is a cyclitol, a cyclic polyol, and a cyclohexanecarboxylic acid. It is a colorless solid that can be extracted from plant sources. Quinic acid is implicated in the perceived acidity of coffee. Occurrence and preparation The compound is obtained from cinchona bark, coffee beans, and the bark of ''Eucalyptus globulus''. It is a constituent of the tara tannins. ''Urtica dioica'' is another common source. It is made synthetically by hydrolysis of chlorogenic acid. Quinic acid is also implicated in the perceived acidity of coffee. History and biosynthesis This substance was isolated for the first time in 1790 by German pharmacist Friedrich Christian Hofmann in Leer from Cinchona. Its transformation into hippuric acid by animal metabolism was studied by German chemist Eduard Lautemann in 1863.Lautemann, E. (1863"Ueber die Reduction der Chinasäure zu Benzoësäure und die Verwandlung derselben in Hippursäure im thierischen Organismus"(On the reduction of quinic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Justus Von Liebig
Justus Freiherr von Liebig (12 May 1803 – 20 April 1873) was a German scientist who made major contributions to agricultural and biological chemistry, and is considered one of the principal founders of organic chemistry. As a professor at the University of Giessen, he devised the modern laboratory-oriented teaching method, and for such innovations, he is regarded as one of the greatest chemistry teachers of all time. He has been described as the "father of the fertilizer industry" for his emphasis on nitrogen and trace minerals as essential plant nutrients, and his formulation of the law of the minimum, which described how plant growth relied on the scarcest nutrient resource, rather than the total amount of resources available. He also developed a manufacturing process for beef extracts, and with his consent a company, called Liebig Extract of Meat Company, was founded to exploit the concept; it later introduced the Oxo brand beef bouillon cube. He popularized an earlier ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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