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Carl Wilhelm Scheele
Carl Wilhelm Scheele (, ; 9 December 1742 – 21 May 1786) was a Swedish German pharmaceutical chemist. Scheele discovered oxygen (although Joseph Priestley published his findings first), and identified molybdenum, tungsten, barium, hydrogen, and chlorine, among others. Scheele discovered organic acids tartaric, oxalic, uric, lactic, and citric, as well as hydrofluoric, hydrocyanic, and arsenic acids. He preferred speaking German to Swedish his whole life, as German was commonly spoken among Swedish pharmacists.Fors, Hjalmar 2008. Stepping through Science’s Door: C. W. Scheele, from Pharmacist's Apprentice to Man of Science. Ambix 55: 29–49 Biography Scheele was born in Stralsund, in western Pomerania, which at the time was a Swedish Dominion inside the Holy Roman Empire. Scheele's father, Joachim (or Johann) Christian Scheele, was a grain dealer and brewer from a respected Pomeranian family. His mother was Margaretha Eleanore Warnekros. Friends of Scheele's p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stralsund
Stralsund (; Swedish: ''Strålsund''), officially the Hanseatic City of Stralsund ( German: ''Hansestadt Stralsund''), is the fifth-largest city in the northeastern German federal state of Mecklenburg-Western Pomerania after Rostock, Schwerin, Neubrandenburg and Greifswald, and the second-largest city in the Pomeranian part of the state. It is located at the southern coast of the Strelasund, a sound of the Baltic Sea separating the island of Rügen from the Pomeranian mainland.'' Britannica Online Encyclopedia'', "Stralsund" (city), 2007, webpageEB-Stralsund The Strelasund Crossing with its two bridges and several ferry services connects Stralsund with Rügen, the largest island of Germany and Pomerania. The Western Pomeranian city is the seat of the Vorpommern-Rügen district and, together with Greifswald, Stralsund forms one of four high-level urban centres of the region. The city's name as well as that of the Strelasund are compounds of the Slavic ( Polabian) ''str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lactic Acid
Lactic acid is an organic acid. It has a molecular formula . It is white in the solid state and it is miscible with water. When in the dissolved state, it forms a colorless solution. Production includes both artificial synthesis as well as natural sources. Lactic acid is an alpha-hydroxy acid (AHA) due to the presence of a hydroxyl group adjacent to the carboxyl group. It is used as a synthetic intermediate in many organic synthesis industries and in various biochemical industries. The conjugate base of lactic acid is called lactate (or the lactate anion). The name of the derived acyl group is lactoyl. In solution, it can ionize by loss of a proton to produce the lactate ion . Compared to acetic acid, its p''K'' is 1 unit less, meaning lactic acid is ten times more acidic than acetic acid. This higher acidity is the consequence of the intramolecular hydrogen bonding between the α-hydroxyl and the carboxylate group. Lactic acid is chiral, consisting of two enantiomers. One ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malmö
Malmö (, ; da, Malmø ) is the largest city in the Swedish county (län) of Scania (Skåne). It is the third-largest city in Sweden, after Stockholm and Gothenburg, and the sixth-largest city in the Nordic region, with a municipal population of 350,647 in 2021. The Malmö Metropolitan Region is home to over 700,000 people, and the Øresund Region, which includes Malmö and Copenhagen, is home to 4 million people. Malmö was one of the earliest and most industrialised towns in Scandinavia, but it struggled to adapt to post-industrialism. Since the 2000 completion of the Öresund Bridge, Malmö has undergone a major transformation, producing new architectural developments, supporting new biotech and IT companies, and attracting students through Malmö University and other higher education facilities. Over time, Malmö's demographics have changed and by the turn of the 2020s almost half the municipal population had a foreign background. The city contains many histo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phlogiston Theory
The phlogiston theory is a superseded scientific theory that postulated the existence of a fire-like element called phlogiston () contained within combustible bodies and released during combustion. The name comes from the Ancient Greek (''burning up''), from (''flame''). The idea was first proposed in 1667 by Johann Joachim Becher and later put together more formally by Georg Ernst Stahl. Phlogiston theory attempted to explain chemical processes such as combustion and rusting, now collectively known as oxidation. It was challenged by the concomitant weight increase, and was abandoned before the end of the 18th century following experiments by Antoine Lavoisier and others. Phlogiston theory led to experiments which ultimately concluded with the discovery of oxygen. Theory Phlogiston theory states that ''phlogisticated'' substances contain phlogiston and that they ''dephlogisticate'' when burned, releasing stored phlogiston which is absorbed by the air. Growing plants then ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Ernst Stahl
Georg Ernst Stahl (22 October 1659 – 24 May 1734) was a German chemist, physician and philosopher. He was a supporter of vitalism, and until the late 18th century his works on phlogiston were accepted as an explanation for chemical processes.Ku-ming Chang (2008)"Stahl, Georg Ernst", ''Complete Dictionary of Scientific Biography'', Vol. 24, from Cengage Learning __TOC__ Biography Georg Ernst Stahl was born on October 22, 1659, at Anspach in Bavaria. Raised as a son to a Lutheran Pastor, he was brought up in a very pious and religious household. From an early age he expressed profound interest toward chemistry, even by age 15 mastering a set of university lecture notes on chemistry and eventually a difficult treatise by Johann Kunckel. He had two wives, who both died from puerperal fever in 1696 and 1706. He also had a son Johnathan and a daughter who died in 1708. He continued to work and publish following the death of both of his wives and eventually his children, but was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Von Löwenstern-Kunckel
Johann Kunckel, awarded Swedish nobility in 1693 under the Swedish name von Löwenstern-Kunckel and the German version of the name Kunckel von Löwenstern (1630 - prob. 20 March 1703), German chemist, was born in 1630 (or 1638), near Rendsburg, his father being alchemist to the court of Holstein. He became chemist and apothecary to the dukes of Lauenburg, and then to the Elector of Saxony, Johann Georg II, who put him in charge of the royal laboratory at Dresden. Intrigues engineered against him caused him to resign this position in 1677, and for a time he lectured on chemistry at Annaberg and Wittenberg. Invited to Berlin by Frederick William, in 1679 he became director of the laboratory and glass works of Brandenburg. In 1688 the king of Sweden, Charles XI, brought him to Stockholm, ennobling him under the name ''von Löwenstern-Kunckel'' in 1693 and making him a member of the Bergskollegium, the Board of Mines. He died probably on 20 March 1703 near Stockholm (other sour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caspar Neumann (chemist)
Caspar Neumann (or Neuman) (July 11, 1683 – October 20, 1737) was a German chemist and apothecary. Biography Birth and Education Neumann was born at Zullichau,Alexander Chalmers: ''General Biographical Dictionary.'' London, 1812, Vol. 23, p. 103. in the Electorate of Brandenburg, July 11, 1683. He was first educated in music by his father, but being orphaned at age 12, he apprenticed to his godfather, the apothecary, Johannes Romke. Completing his apprenticeship in 1701, he commenced practice at Unruhstadt, or Kargowa, in Poland.Alexander Kraft: ''On Two Letters from Caspar Neumann to John Woodward Revealing the Secret Method for Preparation of Prussian Blue.'' p.137. Career After three years in Kargowa, he went to Berlin in 1704, working at first at the apothecary shop of Christoph Schmedicke. Soon thereafter he became a traveling apothecary for the king of Prussia, Frederick I,Noretta Koertge:''Complete Dictionary of Scientific Biography'' and he continued in this capaci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicolas Lemery
Nicolas Lémery (or Lemery as his name appeared in his international publications) (17 November 1645 – 19 June 1715), French chemist, was born at Rouen. He was one of the first to develop theories on acid-base chemistry. Life After learning pharmacy in his native town he became a pupil of Christophe Glaser in Paris, and then went to Montpellier, where he began to lecture on chemistry. He next established a pharmacy in Paris, still continuing his lectures, but following 1683, being a Calvinist, he was obliged to retire to England. In the following year he returned to France, and turning Catholic in 1686 was able to reopen his shop and resume his lectures. He died in Paris on 19 June 1715. Lemery did not concern himself much with theoretical speculations, but holding chemistry to be a demonstrative science, confined himself to the straightforward exposition of facts and experiments. In consequence, his lecture-room was thronged with people of all sorts, anxious to hear a man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pharmacist
A pharmacist, also known as a chemist (Commonwealth English) or a druggist (North American and, archaically, Commonwealth English), is a healthcare professional who prepares, controls and distributes medicines and provides advice and instructions on the correct and safe use of medicines to achieve maximum benefit, minimal side effects and to avoid drug interactions. They also serve as primary care providers in the community. Pharmacists undergo university or graduate-level education to understand the biochemical mechanisms and actions of drugs, drug uses, therapeutic roles, side effects, potential drug interactions, and monitoring parameters. This is mated to anatomy, physiology, and pathophysiology. Pharmacists interpret and communicate this specialized knowledge to patients, physicians, and other health care providers. Among other licensing requirements, different countries require pharmacists to hold either a Bachelor of Pharmacy, Master of Pharmacy, or Doctor of Pharma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gothenburg
Gothenburg (; abbreviated Gbg; sv, Göteborg ) is the second-largest city in Sweden, fifth-largest in the Nordic countries, and capital of the Västra Götaland County. It is situated by the Kattegat, on the west coast of Sweden, and has a population of approximately 590,000 in the city proper and about 1.1 million inhabitants in the metropolitan area. Gothenburg was founded as a heavily fortified, primarily Dutch, trading colony, by royal charter in 1621 by King Gustavus Adolphus. In addition to the generous privileges (e.g. tax relaxation) given to his Dutch allies from the ongoing Thirty Years' War, the king also attracted significant numbers of his German and Scottish allies to populate his only town on the western coast. At a key strategic location at the mouth of the Göta älv, where Scandinavia's largest drainage basin enters the sea, the Port of Gothenburg is now the largest port in the Nordic countries. Gothenburg is home to many students, as the city incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dominions Of Sweden
The Dominions of Sweden or ''Svenska besittningar'' ("Swedish possessions") were territories that historically came under control of the Swedish Crown, but never became fully integrated with Sweden. This generally meant that they were ruled by Governors-General under the Swedish monarch, but within certain limits retained their own established political systems, essentially their diets. Finland was not a dominion, but an integrated part of Sweden. The dominions had no representation in the Swedish Riksdag as stipulated by the 1634 Instrument of Government paragraph 46: ''"No one, who is not living inside the separate and old borders of Sweden and Finland, have anything to say at Riksdags and other meetings..."'' Baltic Dominions Between 1561 and 1629 Sweden made conquests in the Eastern Baltic. All of them were lost in accordance with the Treaty of Nystad in 1721, which concluded the Great Northern War. Estonia Estonia placed itself under Swedish rule in 1561 to receiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arsenic Acid
Arsenic acid or trihydrogen arsenate is the chemical compound with the formula . More descriptively written as , this colorless acid is the arsenic analogue of phosphoric acid. Arsenate and phosphate salts behave very similarly. Arsenic acid as such has not been isolated, but is only found in solution, where it is largely ionized. Its hemihydrate form () does form stable crystals. Crystalline samples dehydrate with condensation at 100 °C. Properties It is a tetrahedral species of idealized symmetry ''C''3v with As–O bond lengths ranging from 1.66 to 1.71 Å. Being a triprotic acid, its acidity is described by three equilibria: :, p''K''a1 = 2.19 :, p''K''a2 = 6.94 :, p''K''a3 = 11.5 These p''K''a values are close to those for phosphoric acid. The highly basic arsenate ion () is the product of the third ionization. Unlike phosphoric acid, arsenic acid is an oxidizer, as illustrated by its ability to convert iodide to iodine. Preparation Arsenic acid is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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