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Nikolay Beketov
Nikolay Nikolayevich Beketov (; , 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" (""). 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 lectures on the "Basics of Thermochemistry" at Moscow State University. Beketov discovered displacement of metals from solutions of their salts by hydrogen under pressure. He also established ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penza Governorate
Penza Governorate () was an administrative-territorial unit (''guberniya'') of the Russian Empire and Russian Soviet Federative Socialist Republic, Russian SFSR, located in the Volga Region. It existed from 1780 to 1797 and again from 1801 to 1928; its capital was in Penza. Uyezds Penza Governorate was subdivided into ten uyezds: * Gorodishchensky Uyezd * Insarsky Uyezd * Kerensky Uyezd * Krasnoslobodsky Uyezd * Mokshansky Uyezd * Narovchatsky Uyezd * Nizhnelomovsky Uyezd * Penzensky Uyezd * Saransky Uyezd * Chembarsky Uyezd Demographics At the time of the Russian Empire Census of 1897, Penza Governorate had a population of 1,470,474. Of these, 83.0% spoke Russian language, Russian, 12.8% Mordvinic languages, Mordvin, 4.0% Tatar language, Tatar, 0.1% Ukrainian language, Ukrainian and 0.1% Polish language, Polish as their native language. Демос ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium
Magnesium is a chemical element; it has Symbol (chemistry), symbol Mg and atomic number 12. It is a shiny gray metal having a low density, low melting point and high chemical reactivity. Like the other alkaline earth metals (group 2 of the periodic table), it occurs naturally only in combination with other elements and almost always has an oxidation state of +2. It reacts readily with air to form a thin Passivation (chemistry), passivation coating of magnesium oxide that inhibits further corrosion of the metal. The free metal burns with a brilliant-white light. The metal is obtained mainly by electrolysis of magnesium Salt (chemistry), salts obtained from brine. It is less dense than aluminium and is used primarily as a component in strong and lightweight magnesium alloy, alloys that contain aluminium. In the cosmos, magnesium is produced in large, aging stars by the sequential addition of three Helium nucleus, helium nuclei to a carbon nucleus. When such stars explo ... [...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 graduated scientist trained in the study of chemistry, or an officially enrolled student in the field. 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 wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Blok
Alexander Alexandrovich Blok ( rus, Алекса́ндр Алекса́ндрович Бло́к, p=ɐlʲɪˈksandr ɐlʲɪˈksandrəvʲɪtɕ ˈblok, a=Ru-Alyeksandr Alyeksandrovich Blok.oga; 7 August 1921) was a Russian lyrical poet, writer, publicist, playwright, translator and literary critic. Early life Blok was born in Saint Petersburg, into an intellectual family of Alexander Lvovich Blok and Alexandra Andreevna Beketova. His father was a law professor in Warsaw, and his maternal grandfather, Andrey Beketov, was a famous botanist and the rector of Saint Petersburg State University. After his parents' separation, Blok lived with aristocratic relatives at the manor Solnechnogorsk, Shakhmatovo near Moscow, where he discovered the philosophy of Vladimir Solovyov (philosopher), Vladimir Solovyov, and the verse of then-obscure 19th-century poets, Fyodor Tyutchev and Afanasy Fet. These influences would affect his early publications, later collected in the book ''Ante Lucem''. Car ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flavian Flavitsky
Flavian may refer to: * A member of the Flavian dynasty of Roman emperors, during the late 1st century AD, or their works * Flavian Zeija, a Ugandan lawyer, academic and judge. Principal Judge of Uganda, since December 2019. * A person named Flavianus Religious leaders * Flavian, one of the Martyrs of Carthage under Valerian * Flavian of Ricina (fl. c. 3rd century), bishop in Italy * Bishops or patriarchs in Asia: ** Flavian I of Antioch (c. 320–404) ** Archbishop Flavian of Constantinople (died 449) ** Patriarch Fravitta of Constantinople (died 489) ** Flavian II of Antioch (died 518) Ships *, an Italian cruise ship See also * Constantinian dynasty, also called the Neo-Flavian dynasty * Flavian Amphitheater (the Colosseum) * Flavia (gens) The gens Flavia was a plebeian family at ancient Rome. Its members are first mentioned during the last three centuries of the Republic. The first of the Flavii to achieve prominence was Marcus Flavius, tribune of the plebs in 327 and 323 B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Eltekov
Alexander () is a male name of Greek origin. The most prominent bearer of the name is Alexander the Great, the king of the Ancient Greek kingdom of Macedonia who created one of the largest empires in ancient history. Variants listed here are Aleksandar, Aleksander, Oleksandr, Oleksander, Aleksandr, and Alekzandr. Related names and diminutives include Iskandar, Alec, Alek, Alex, Alexsander, Alexandre, Aleks, Aleksa, Aleksandre, Alejandro, Alessandro, Alasdair, Sasha, Sandy, Sandro, Sikandar, Skander, Sander and Xander; feminine forms include Alexandra, Alexandria, and Sasha. Etymology The name ''Alexander'' originates from the (; 'defending men' or 'protector of men'). It is a compound of the verb (; 'to ward off, avert, defend') and the noun (, genitive: , ; meaning 'man'). The earliest attested form of the name, is the Mycenaean Greek feminine anthroponym , , (/Alexandra/), written in the Linear B syllabic script. Alaksandu, alternatively called ''Alakasandu'' or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petersburg Academy Of Sciences
The Russian Academy of Sciences (RAS; ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across the Russian Federation; and additional scientific and social units such as libraries, publishing units, and hospitals. Peter the Great established the academy (then the St. Petersburg Academy of Sciences) in 1724 with guidance from Gottfried Leibniz. From its establishment, the academy benefitted from a slate of foreign scholars as professors; the academy then gained its first clear set of goals from the 1747 Charter. The academy functioned as a university and research center throughout the mid-18th century until the university was dissolved, leaving research as the main pillar of the institution. The rest of the 18th century continuing on through the 19th century consisted of many published academic works from Academy scholars and a few Academy name changes, ending as The Imperial Saint Petersburg Academy of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kharkov
Kharkiv, also known as Kharkov, is the second-largest List of cities in Ukraine, city 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 region of Sloboda Ukraine. Kharkiv is the administrative centre of Kharkiv Oblast and Kharkiv Raion. Prior to the Russian invasion of Ukraine in early 2022, it had an estimated population of 1,421,125. Founded in 1654 as a Cossacks, Cossack fortress, by late 19th century Kharkiv had developed within the Russian Empire as a major commercial and industrial centre. From December 1919 to January 1934, Kharkiv was the capital of the Ukrainian Soviet Socialist Rep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science
Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. Modern science is typically divided into twoor threemajor branches: the natural sciences, which study the physical world, and the social sciences, which study individuals and societies. While referred to as the formal sciences, the study of logic, mathematics, and theoretical computer science are typically regarded as separate because they rely on deductive reasoning instead of the scientific method as their main methodology. Meanwhile, applied sciences are disciplines that use scientific knowledge for practical purposes, such as engineering and medicine. The history of science spans the majority of the historical record, with the earliest identifiable predecessors to modern science dating to the Bronze Age in Ancient Egypt, Egypt and Mesopotamia (). Their contributions to mathematics, astronomy, and medicine entered and shaped the Gree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physical Chemistry
Physical chemistry is the study of macroscopic and microscopic phenomena in chemical systems in terms of the principles, practices, and concepts of physics such as motion, energy, force, time, thermodynamics, quantum chemistry, statistical mechanics, analytical dynamics and chemical equilibria. Physical chemistry, in contrast to chemical physics, is predominantly (but not always) a supra-molecular science, as the majority of the principles on which it was founded relate to the bulk rather than the molecular or atomic structure alone (for example, chemical equilibrium and colloids). Some of the relationships that physical chemistry strives to understand include the effects of: # Intermolecular forces that act upon the physical properties of materials ( plasticity, tensile strength, surface tension in liquids). # Reaction kinetics on the rate of a reaction. # The identity of ions and the electrical conductivity of materials. # Surface science and electrochemistry of cell m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluminothermic Reaction
Aluminothermic reactions are exothermic reaction, exothermic chemical reactions using aluminium as the reducing agent at high temperature. The process is industrially useful for production of alloys of iron. The most prominent example is the thermite reaction between iron oxides and aluminium to produce iron itself: : Fe2O3 + 2 Al → 2 Fe + Al2O3 This specific reaction is however not relevant to the most important application of aluminothermic reactions, the production of ferroalloys. For the production of iron, a cheaper reducing agent, Coke (fuel), coke, is used instead via the carbothermic reaction. History Aluminothermy started from the experiments of Russian scientist Nikolay Beketov at the University of Kharkiv in Ukraine, who proved that aluminium restored metals from their oxides under high temperatures. The reaction was first used for the carbon-free reduction of metal oxides. The reaction is highly exothermic, but it has a high activation energy since strong ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxide
An oxide () is a chemical compound containing at least one oxygen atom and one other element in its chemical formula. "Oxide" itself is the dianion (anion bearing a net charge of −2) of oxygen, an O2− ion with oxygen in the oxidation state of −2. Most of the Earth's crust consists of oxides. Even materials considered pure elements often develop an oxide coating. For example, aluminium foil develops a thin skin of (called a passivation layer) that protects the foil from further oxidation.Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. . Stoichiometry Oxides are extraordinarily diverse in terms of stoichiometries (the measurable relationship between reactants and chemical equations of an equation or reaction) and in terms of the structures of each stoichiometry. Most elements form oxides of more than one stoichiometry. A well known example is carbon monoxide and carbon dioxide.Greenwood, N. N.; & Earnsh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
