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Russian Chemists
This list of Russian chemists includes the famous chemists and material scientists of the Russian Federation, the Soviet Union, the Russian Empire and other predecessor states of Russia. Alphabetical list __NOTOC__ A * Aleksandr Arbuzov, discovered Arbuzov reaction. B * Alexander Baykov, an academician of the USSR Academy of Sciences. * Ernest Beaux, inventor of Chanel No. 5, "the world's most legendary fragrance" * Nikolay Beketov, inventor of aluminothermy, a founder of physical chemistry * Friedrich Konrad Beilstein, proposed the Beilstein test for the detection of halogens, author of the Beilstein database in organic chemistry * Boris Belousov, chemist and biophysicist, discoverer of Belousov–Zhabotinsky reaction, a classical example of non-equilibrium thermodynamics *Alexander Borodin, chemist and composer, the author of the famous opera '' Prince Igor'', discovered Borodin reaction, co-discovered Aldol reaction *Aleksandr Butlerov, discovered hexamine, formalde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Periodic Table Monument
Periodicity or periodic may refer to: Mathematics * Bott periodicity theorem, addresses Bott periodicity: a modulo-8 recurrence relation in the homotopy groups of classical groups * Periodic function, a function whose output contains values that repeat periodically * Periodic mapping Physical sciences * Periodic table of chemical elements * Periodic trends, relative characteristics of chemical elements observed * Redshift periodicity, astronomical term for redshift quantization Other uses * Fokker periodicity blocks, which mathematically relate musical intervals * Periodic acid, a compound of iodine * Principle of periodicity, a concept in generally accepted accounting principles * Quasiperiodicity, property of a system that displays irregular periodicity See also * Aperiodic (other) * Cycle (other) * Frequency (other) * Period (other) * Periodical * Seasonality, periodic variation, or periodic fluctuations {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beilstein Test
The Beilstein test is a simple qualitative chemical test for organic halides. It was developed by Friedrich Konrad Beilstein. A copper wire is cleaned and heated in a Bunsen burner flame to form a coating of copper(II) oxide. It is then dipped in the sample to be tested and once again heated in a flame. A positive test is indicated by a green flame caused by the formation of a copper halide. The test does not detect fluorine/fluorides. This test is no longer frequently used. One reason why it is not widely used is that it is possible to generate the highly toxic chloro-dioxins if the test material is a polychloroarene. An alternative wet test for halide is the sodium fusion test — this test converts organic material to inorganic salts include the sodium halide. Addition of silver nitrate Silver nitrate is an inorganic compound with chemical formula . It is a versatile precursor to many other silver compounds, such as those used in photography. It is far less sensiti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexamine
Hexamethylenetetramine (HMTA), also known as 1,3,5,7-tetraazaadamantane, is a heterocyclic organic compound with diverse applications. It has the chemical formula (CH2)6N4 and is a white crystalline compound that is highly soluble in water and polar organic solvents. It is useful in the synthesis of other organic compounds, including plastics, pharmaceuticals, and rubber additives. The compound is also used medically for certain conditions. It sublimes in vacuum at 280°C. It has a tetrahedral cage-like structure similar to adamantane. The four vertices are occupied by nitrogen atoms, which are linked by methylene groups. Although the molecular shape defines a cage, no void space is available at the interior. Synthesis, structure, reactivity Hexamethylenetetramine was discovered by Aleksandr Butlerov in 1859. In this article, Butlerov discovered formaldehyde, which he called "dioxymethylen" (methylene dioxide) age 247because his empirical formula for it was incorrect (C4H4O4) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleksandr Butlerov
Alexander Mikhaylovich Butlerov (; 15 September 1828 – 17 August 1886) was a Russian chemist, one of the principal creators of the theory of chemical structure (1857–1861), the first to incorporate double bonds into structural formulas, the discoverer of hexamine (1859), the discoverer of formaldehyde (1859) and the discoverer of the formose reaction (1861). He first proposed the idea of possible tetrahedral arrangement of valence bonds in carbon compounds in 1862. The crater Butlerov on the Moon is named after him. In 1956 the Academy of Sciences of the USSR established the A. M. Butlerov Prize. Biography Butlerov was born into a landowning family. In 1849 he graduated from the Imperial Kazan University. after which he worked there as a teacher. From 1860 to 1863 he was the rector. From 1868 to 1885 he was a professor of Chemistry at the Imperial St. Petersburg University. Butlerov was the chairman of the Chemistry Department of the Russian Physico-Che ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aldol Reaction
The aldol reaction (aldol addition) is a Chemical reaction, reaction in organic chemistry that combines two Carbonyl group, carbonyl compounds (e.g. aldehydes or ketones) to form a new β-hydroxy carbonyl compound. Its simplest form might involve the nucleophilic addition of an Enolate, enolized ketone to another: These products are known as ''aldols'', from the ''ald''ehyde + alcoh''ol'', a structural motif seen in many of the products. The use of aldehyde in the name comes from its history: aldehydes are more reactive than ketones, so that the reaction was discovered first with them. The aldol reaction is paradigmatic in organic chemistry and one of the most common means of forming carbon–carbon bonds in organic chemistry. It lends its name to the family of aldol reactions and similar techniques analyze a whole family of carbonyl α-substitution reactions, as well as the Claisen condensation, diketone condensations. Scope Aldol structural units are found in many importa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Borodin Reaction
Alexander Porfiryevich Borodin (12 November 183327 February 1887) was a Russian Romantic composer and chemist of Georgian–Russian parentage. He was one of the prominent 19th-century composers known as " The Five", a group dedicated to producing a "uniquely Russian" kind of classical music. Abraham, Gerald. ''Borodin: the Composer and his Music''. London, 1927. Borodin is known best for his symphonies, his two string quartets, the symphonic poem '' In the Steppes of Central Asia'' and his opera '' Prince Igor''. A doctor and chemist by profession and training, Borodin made important early contributions to organic chemistry. Although he is presently known better as a composer, he regarded medicine and science as his primary occupations, only practising music and composition in his spare time or when he was ill. As a chemist, Borodin is known best for his work concerning organic synthesis, including being among the first chemists to demonstrate nucleophilic substitution, as w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prince Igor
''Prince Igor'' (, ) is an opera in four acts with a prologue, written and composed by Alexander Borodin. The composer adapted the libretto from the early Russian epic '' The Lay of Igor's Host'', which recounts the campaign of the 12th-century prince Igor Svyatoslavich against the invading Cuman ("Polovtsian") tribes in 1185. He also incorporated material drawn from two medieval Kievan chronicles. The opera was left unfinished upon the composer's death in 1887 and was edited and completed by Nikolai Rimsky-Korsakov and Alexander Glazunov. It was first performed in St. Petersburg, Russia, in 1890. Composition history Original composition: 1869–1887 After briefly considering Lev Mei's ''The Tsar's Bride'' as a subject (later taken up in 1898 by Nikolai Rimsky-Korsakov, his 9th opera), Borodin began looking for a new project for his first opera. Vladimir Stasov, critic and advisor to The Mighty Handful, suggested '' The Lay of Igor's Host'', a 12th century epic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Borodin
Alexander Porfiryevich Borodin (12 November 183327 February 1887) was a Russian Romantic composer and chemist of Georgian–Russian parentage. He was one of the prominent 19th-century composers known as " The Five", a group dedicated to producing a "uniquely Russian" kind of classical music. Abraham, Gerald. ''Borodin: the Composer and his Music''. London, 1927. Borodin is known best for his symphonies, his two string quartets, the symphonic poem '' In the Steppes of Central Asia'' and his opera '' Prince Igor''. A doctor and chemist by profession and training, Borodin made important early contributions to organic chemistry. Although he is presently known better as a composer, he regarded medicine and science as his primary occupations, only practising music and composition in his spare time or when he was ill. As a chemist, Borodin is known best for his work concerning organic synthesis, including being among the first chemists to demonstrate nucleophilic substitution, as w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Non-equilibrium Thermodynamics
Non-equilibrium thermodynamics is a branch of thermodynamics that deals with physical systems that are not in thermodynamic equilibrium but can be described in terms of macroscopic quantities (non-equilibrium state variables) that represent an extrapolation of the variables used to specify the system in thermodynamic equilibrium. Non-equilibrium thermodynamics is concerned with transport processes and with the rates of chemical reactions. Almost all systems found in nature are not in thermodynamic equilibrium, for they are changing or can be triggered to change over time, and are continuously and discontinuously subject to flux of matter and energy to and from other systems and to chemical reactions. Many systems and processes can, however, be considered to be in equilibrium locally, thus allowing description by currently known equilibrium thermodynamics. Nevertheless, some natural systems and processes remain beyond the scope of equilibrium thermodynamic methods due to the exis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belousov–Zhabotinsky Reaction
A Belousov–Zhabotinsky reaction, or BZ reaction, is one of a class of reactions that serve as a classical example of non-equilibrium thermodynamics, resulting in the establishment of a nonlinear chemical oscillator. The only common element in these oscillators is the inclusion of bromine and an acid. The reactions are important to theoretical chemistry in that they show that chemical reactions do not have to be dominated by equilibrium thermodynamic behavior. These reactions are far from equilibrium and remain so for a significant length of time and evolve chaotically. In this sense, they provide an interesting chemical model of nonequilibrium biological phenomena; as such, mathematical models and simulations of the BZ reactions themselves are of theoretical interest, showing phenomenon as noise-induced order. An essential aspect of the BZ reaction is its so called "excitability"; under the influence of stimuli, patterns develop in what would otherwise be a perfectly quie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boris Pavlovich Belousov
Boris Pavlovich Belousov (; 19 February 1893 – 12 June 1970) was a Soviet chemist and biophysicist who discovered the Belousov–Zhabotinsky reaction (BZ reaction) in the early 1950s. His work initiated the field of modern nonlinear chemical dynamics. The Belousov family had strong anti-Tsarist sympathies and, after the Russian Revolution of 1905, they were arrested and later forced to leave the country. They settled in Switzerland, where Boris studied chemistry in Zürich. Returning to Russia at the beginning of World War I,Ник. ГорькавыйСказка о химике Белоусове, который изготовил жидкие часы Ж. НиЖ №2, 2011 г. Belousov tried to join the army, but was denied for health reasons. He took up a job in a military lab under the direction of the chemist Vladimir Ipatiev. His value to the institute is indicated by the high military rank, Brigade Commander, roughly corresponding to General, that he attained. After ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
