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Jaan Kalviste
Jaan Kalviste (3 April 1898 – 15 June 1936)virumaa.ee ''VE: Kalviste, Jaan – keemik'' (in ) 15 January 2003. Retrieved 3 October 2018. was an , mineralogist, , and |
Läste
Läste is a village in Tapa Parish, Lääne-Viru County, in northeastern Estonia. (retrieved 28 July 2021) Estonian chemist Jaan Kalviste Jaan Kalviste (3 April 1898 – 15 June 1936)virumaa.ee ''VE: Kalviste, Jaan – keemik'' (in (1898–1936) was born on Mikko farm in Läste. References Villages in Lääne-Viru County Kreis Jerwen {{LääneViru-geo-stub ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tallinn
Tallinn () is the most populous and capital city of Estonia. Situated on a bay in north Estonia, on the shore of the Gulf of Finland of the Baltic Sea, Tallinn has a population of 437,811 (as of 2022) and administratively lies in the Harju ''maakond'' (county). Tallinn is the main financial, industrial, and cultural centre of Estonia. It is located northwest of the country's second largest city Tartu, however only south of Helsinki, Finland, also west of Saint Petersburg, Russia, north of Riga, Latvia, and east of Stockholm, Sweden. From the 13th century until the first half of the 20th century, Tallinn was known in most of the world by variants of its other historical name Reval. Tallinn received Lübeck city rights in 1248,, however the earliest evidence of human population in the area dates back nearly 5,000 years. The medieval indigenous population of what is now Tallinn and northern Estonia was one of the last " pagan" civilisations in Europe to adopt Christianit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jõhvi
Jõhvi is a town in northeastern Estonia, and the administrative centre of the Ida-Viru County. The town is also an administrative centre of Jõhvi Parish. It is situated about 50 km west of the Estonia–Russia international border. History Jõhvi was first mentioned as a village in 1241 in Liber Census Daniae when it was ruled by Denmark. Historical names of Jõhvi were ''Gewi'' and ''Jewe''. In the 13th century a church was built there and Jõhvi became the centre of the local church parish. On 1 May 1938, the government of Estonia upgraded the official status of Jõhvi from "borough" to that of an independent "town". During the period of Soviet occupation (1944–1991), Jõhvi was administratively not a town, but a district of the city of Kohtla-Järve. In 2005, the town of Jõhvi was united with the parish of Jõhvi. During the period of the Soviet occupation, large numbers of immigrant workers from Russia and other parts of the former USSR were brought in to po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photochemistry
Photochemistry is the branch of chemistry concerned with the chemical effects of light. Generally, this term is used to describe a chemical reaction caused by absorption of ultraviolet (wavelength from 100 to 400 nm), visible light (400–750 nm) or infrared radiation (750–2500 nm). In nature, photochemistry is of immense importance as it is the basis of photosynthesis, vision, and the formation of vitamin D with sunlight. Photochemical reactions proceed differently than temperature-driven reactions. Photochemical paths access high energy intermediates that cannot be generated thermally, thereby overcoming large activation barriers in a short period of time, and allowing reactions otherwise inaccessible by thermal processes. Photochemistry can also be destructive, as illustrated by the photodegradation of plastics. Concept Grotthuss–Draper law and Stark-Einstein law Photoexcitation is the first step in a photochemical process where the reactant is elevated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phenols
In organic chemistry, phenols, sometimes called phenolics, are a class of chemical compounds consisting of one or more hydroxyl groups (— O H) bonded directly to an aromatic hydrocarbon group. The simplest is phenol, . Phenolic compounds are classified as simple phenols or polyphenols based on the number of phenol units in the molecule. Phenols are both synthesized industrially and produced by plants and microorganisms. Properties Acidity Phenols are more acidic than typical alcohols. The acidity of the hydroxyl group in phenols is commonly intermediate between that of aliphatic alcohols and carboxylic acids (their pKa is usually between 10 and 12). Deprotonation of a phenol forms a corresponding negative phenolate ion or phenoxide ion, and the corresponding salts are called phenolates or phenoxides (aryloxides according to the IUPAC Gold Book). Condensation with aldehydes and ketones Phenols are susceptible to Electrophilic aromatic substitutions. Condensation with formald ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oil Shale
Oil shale is an organic-rich fine-grained sedimentary rock containing kerogen (a solid mixture of organic chemical compounds) from which liquid hydrocarbons can be produced. In addition to kerogen, general composition of oil shales constitutes inorganic substance and bitumens. Based on their deposition environment, oil shales are classified as marine, lacustrine and terrestrial oil shales. Oil shales differ from oil-''bearing'' shales, shale deposits that contain petroleum (tight oil) that is sometimes produced from drilled wells. Examples of oil-''bearing'' shales are the Bakken Formation, Pierre Shale, Niobrara Formation, and Eagle Ford Formation. Accordingly, shale oil produced from oil shale should not be confused with tight oil, which is also frequently called shale oil. Deposits of oil shale occur around the world, including major deposits in the United States. A 2016 estimate of global deposits set the total world resources of oil shale equivalent of of oil in place. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kohtla-Järve
Kohtla-Järve is a city and municipality in northeastern Estonia, founded in 1924 and incorporated as a town in 1946. The city is highly industrial, and is both a processor of oil shales and is a large producer of various petrochemical products. During the 1944–1991 Soviet occupation, large numbers of immigrant workers from Russia and other parts of the former USSR were brought in to populate the rapidly growing city. The population in the Kohtla-Järve area which had been, as of 1934 census, over 90% ethnic Estonian, became overwhelmingly non-Estonian in the second half of the 20th century. According to more recent data (as of 2006) 21% of the city's population are ethnic Estonians; most of the rest are Russians. Kohtla-Järve is the fifth-largest city in Estonia in terms of population. Kohtla-Järve is unusual among the municipalities of Estonia due to its territory being made of several discontiguous parts. The two main parts, Järve (Kohtla-Järve proper) and Ahtme, both ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Docent
The title of docent is conferred by some European universities to denote a specific academic appointment within a set structure of academic ranks at or below the full professor rank, similar to a British readership, a French " ''maître de conférences''" (MCF), and equal to or above the title of " associate professor". Docent is also used at some (mainly German) universities generically for a person who has the right to teach. The term is derived from the Latin word ''docēns'', which is the present active participle of ''docēre'' (to teach, to lecture). Becoming a docent is often referred to as Habilitation or doctor of science and is an academic qualification that shows that the holder is qualified to be employed at the level of associate or full professor. Docent is the highest academic title in several countries, and the qualifying criteria are research output that corresponds to 3-5 doctoral dissertations, supervision of PhD students, and experience in teaching at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Masson (publisher)
Masson was a French publisher which specialized principally in medical and scientific books and journals. It also published textbooks for secondary and tertiary education.Historique de l’éditeur: Elsevier-Masson rev-mal-respir.com. Retrieved 16 January 2022. Company history In 1802, Nicolas Crochard set up as a printer and bookseller in in association with Pierre-Antoine-Louis Allut. In 1804, Crochard continued the business on his own and from 1807, he specialised in scientific and medical publishing. In 1826, he passed the business to his son Eugène Crochard, who from 1835. would run the business with Victor Masson (1807—1879). In 1846, Masson became the sole proprietor ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doctor Of Science
Doctor of Science ( la, links=no, Scientiae Doctor), usually abbreviated Sc.D., D.Sc., S.D., or D.S., is an academic research degree awarded in a number of countries throughout the world. In some countries, "Doctor of Science" is the degree used for the standard doctorate in the sciences; elsewhere the Sc.D. is a "higher doctorate" awarded in recognition of a substantial and sustained contribution to scientific knowledge beyond that required for a Doctor of Philosophy (PhD). Africa Algeria and Morocco In Algeria, Morocco, Libya and Tunisia, all universities accredited by the state award a "Doctorate" in all fields of science and humanities, equivalent to a PhD in the United Kingdom or United States. Some universities in these four Arab countries award a "Doctorate of the State" in some fields of study and science. A "Doctorate of the State" is slightly higher in esteem than a regular doctorate, and is awarded after performing additional in-depth post-doctorate research or ach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Master's Degree
A master's degree (from Latin ) is an academic degree awarded by universities or colleges upon completion of a course of study demonstrating mastery or a high-order overview of a specific field of study or area of professional practice. A master's degree normally requires previous study at the bachelor's degree, bachelor's level, either as a separate degree or as part of an integrated course. Within the area studied, master's graduates are expected to possess advanced knowledge of a specialized body of and applied topics; high order skills in |
Estonian War Of Independence
The Estonian War of Independence ( et, Vabadussõda, literally "Freedom War"), also known as the Estonian Liberation War, was a defensive campaign of the Estonian Army and its allies, most notably the United Kingdom, against the Bolshevik westward offensive of 1918–1919 and the 1919 aggression of the ''Baltische Landeswehr''. The campaign was the struggle of the newly established democratic nation of Estonia for independence in the aftermath of World War I. It resulted in a victory for Estonia and was concluded in the 1920 Treaty of Tartu. Preface In November 1917, upon the disintegration of the Russian Empire, a diet of the Autonomous Governorate of Estonia, the Estonian Provincial Assembly, which had been elected in the spring of that year, proclaimed itself the highest authority in Estonia. Soon thereafter, the Bolsheviks dissolved the Estonian Provincial Assembly and temporarily forced the pro-independence Estonians underground in the capital Tallinn. A few months later, u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
