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Walter Seelmann-Eggebert
Wilhem Walter Rudolph Max Seelmann-Eggebert (17 April 1915 – 19 July 1988) was a German radiochemist. He was son of Erich Eggebert and Edwig Schmidt. He was a student of Otto Hahn at the Kaiser Wilhelm Institute for Chemistry, where, after 1939, he worked with Fritz Strassmann on nuclear fission. In 1949, he joined the University of Tucuman in Argentina as a professor of chemistry. Later he created the radiochemistry group at the Buenos Aires University and at the National Atomic Energy Commission, working together with other notable pioneers of radiochemistry, such as Sara Abecasis, Gregorio Baro, Juan Flegenheimer, Jaime Pahissa-Campá, María Cristina Palcos, Enzo Ricci, Renato Radicella, Plinio Rey, Josefina Rodríguez, and Maela Viirsoo, just to mention a few. During his Argentinian years his group discovered 20 new nuclides. In 1955, Otto Hahn invited him to come back to Germany for the reconstruction of radiochemistry studies in the country. He became professor in Main ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karlsruhe
Karlsruhe ( , , ; South Franconian: ''Kallsruh'') is the third-largest city of the German state (''Land'') of Baden-Württemberg after its capital of Stuttgart and Mannheim, and the 22nd-largest city in the nation, with 308,436 inhabitants. It is also a former capital of Baden, a historic region named after Hohenbaden Castle in the city of Baden-Baden. Located on the right bank of the Rhine near the French border, between the Mannheim/ Ludwigshafen conurbation to the north and Strasbourg/Kehl to the south, Karlsruhe is Germany's legal center, being home to the Federal Constitutional Court (''Bundesverfassungsgericht''), the Federal Court of Justice (''Bundesgerichtshof'') and the Public Prosecutor General of the Federal Court of Justice (''Generalbundesanwalt beim Bundesgerichtshof''). Karlsruhe was the capital of the Margraviate of Baden-Durlach (Durlach: 1565–1718; Karlsruhe: 1718–1771), the Margraviate of Baden (1771–1803), the Electorate of Baden (1803–1806), th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Tucuman
A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. Universities typically offer both undergraduate and postgraduate programs. In the United States, the designation is reserved for colleges that have a graduate school. The word ''university'' is derived from the Latin ''universitas magistrorum et scholarium'', which roughly means "community of teachers and scholars". The first universities were created in Europe by Catholic Church monks. The University of Bologna (''Università di Bologna''), founded in 1088, is the first university in the sense of: *Being a high degree-awarding institute. *Having independence from the ecclesiastic schools, although conducted by both clergy and non-clergy. *Using the word ''universitas'' (which was coined at its foundation). *Issuing secular and non-secular degrees: grammar, rhetoric, logic, theology, canon law, notarial law.Hunt Janin: "The university ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karlsruhe Nuclide Chart
The Karlsruhe Nuclide Chart is a widespread table of nuclides in print. Characteristics It is a two-dimensional graphical representation in the Emilio Segrè, Segrè-arrangement with the neutron number ''N'' on the abscissa and the proton number ''Z'' on the ordinate. Each nuclide is represented at the intersection of its respective neutron and proton number by a small square box with the chemical symbol and the nucleon number ''A''. By columnar subdivision of such a field, in addition to ground states also nuclear isomers can be shown. The coloring of a field (segmented if necessary) shows in addition to the existing text entries the observed types of Radioactive_decay#Types_of_decay, radioactive decay of the nuclide and a rough classification of their relative shares: stable nuclide, stable, nonradioactive nuclides completely black, Primordial nuclide, primordial radionuclides partially black, proton emission orange, alpha decay yellow, beta plus decay/electron capture red, isom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerda Pfennig
Gerda is a feminine given name. Notable people with the name include: A *Gerda Ahlm (1869–1956), Swedish-born American painter and art conservator * Gerda Alexander (1908–1994), Danish teacher and therapist * Gerda Antti (born 1929), Swedish writer B * Gerda Becker, Dutch table tennis player *Gerda Bengtsson (1900–1995), Danish textile artist * Gerda Blees (born 1985), Dutch writer * Gerda Blumenthal (1923–2004), German-American literary scholar *Gerda Boyesen (born 1922), Norwegian psychotherapist * Gerda Bredgaard (1908–1996), Danish swimmer * Gerda Bryłka (born 1941), Polish gymnast * Gerda Bülow, (1904–1990), Danish violinist C *Gerda Charles, pseudonym of the British novelist Edna Lipson (1915–1996) * Gerda Christian (1913–1997), German private secretary of Adolf Hitler *Gerda Christophersen (1870–1947), Danish actress *Gerda Claeskens (fl. 2000s), Belgian statistician D * Gerda Daumerlang (1920–2006), German diver *Gerda Dendooven (born 1962), Belgi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mainz
Mainz () is the capital and largest city of Rhineland-Palatinate, Germany. Mainz is on the left bank of the Rhine, opposite to the place that the Main (river), Main joins the Rhine. Downstream of the confluence, the Rhine flows to the north-west, with Mainz on the left bank, and Wiesbaden, the capital of the neighbouring state Hesse, on the right bank. Mainz is an independent city with a population of 218,578 (as of 2019) and forms part of the Frankfurt Rhine-Main, Frankfurt Rhine-Main Metropolitan Region. Mainz was founded by the Roman Empire, Romans in the 1st century BC as a military fortress on the northernmost frontier of the empire and provincial capital of Germania Superior. Mainz became an important city in the 8th century AD as part of the Holy Roman Empire, capital of the Electorate of Mainz and seat of the Elector of Mainz, Archbishop-Elector of Mainz, the Primate (bishop), Primate of Germany. Mainz is famous as the birthplace of Johannes Gutenberg, the inventor of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclide
A nuclide (or nucleide, from nucleus, also known as nuclear species) is a class of atoms characterized by their number of protons, ''Z'', their number of neutrons, ''N'', and their nuclear energy state. The word ''nuclide'' was coined by Truman P. Kohman in 1947. Kohman defined ''nuclide'' as a "species of atom characterized by the constitution of its nucleus" containing a certain number of neutrons and protons. The term thus originally focused on the nucleus. Nuclides vs isotopes A nuclide is a species of an atom with a specific number of protons and neutrons in the nucleus, for example carbon-13 with 6 protons and 7 neutrons. The nuclide concept (referring to individual nuclear species) emphasizes nuclear properties over chemical properties, while the isotope concept (grouping all atoms of each element) emphasizes chemical over nuclear. The neutron number has large effects on nuclear properties, but its effect on chemical reactions is negligible for most elements. Even in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Atomic Energy Commission
The National Atomic Energy Commission ( es, Comisión Nacional de Energía Atómica, CNEA) is the Argentine government agency in charge of nuclear energy research and development. The agency was created on May 31, 1950, with the mission of developing and controlling nuclear energy for peaceful purposes in the country. CNEA's facilities include the Bariloche Atomic Centre (in San Carlos de Bariloche), Constituyentes Atomic Centre (in Buenos Aires), and Ezeiza Atomic Centre (in Ezeiza, Buenos Aires Province). CNEA operates research reactors at each of these sites. History Officially established by President Juan Perón's Decree No 10.936, CNEA filled the need for a state organ to oversee the funding of the Huemul Project in Bariloche. Before CNEA came into being, the project was funded by the Dirección de Migraciones. In practice CNEA had only four members (Juan Domingo Perón, González, Mendé and Ronald Richter). In 1951, decree 9697 created another agency, the Dirección ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buenos Aires University
The University of Buenos Aires ( es, Universidad de Buenos Aires, UBA) is a public university, public research university in Buenos Aires, Argentina. Established in 1821, it is the premier institution of higher learning in the country and one of the most prestigious universities of Ibero-America. It has educated 17 President of Argentina, Argentine presidents, produced four of the country's five Nobel Prize laureates, and is responsible for approximately 40% of the country's research output. The ''QS World University Rankings'' currently places the UBA at number 67, the highest ranking university in the Spanish-speaking world. The university's academic strength and regional leadership make it attractive to many international students, especially at the postgraduate level. Just over 4 percent of undergraduates are foreigners, while 15 percent of postgraduate students come from abroad. The Faculty of Economic Sciences, University of Buenos Aires, Faculty of Economic Sciences has t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Fission
Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay. Nuclear fission of heavy elements was discovered on Monday 19 December 1938, by German chemist Otto Hahn and his assistant Fritz Strassmann in cooperation with Austrian-Swedish physicist Lise Meitner. Hahn understood that a "burst" of the atomic nuclei had occurred. Meitner explained it theoretically in January 1939 along with her nephew Otto Robert Frisch. Frisch named the process by analogy with biological fission of living cells. For heavy nuclides, it is an exothermic reaction which can release large amounts of energy both as electromagnetic radiation and as kinetic energy of the fragments (heating the bulk material where fission takes place). Like nuclear fusion, for fission to produce energy, the total binding energy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiochemistry
Radiochemistry is the chemistry of radioactive materials, where radioactive isotopes of elements are used to study the properties and chemical reactions of non-radioactive isotopes (often within radiochemistry the absence of radioactivity leads to a substance being described as being ''inactive'' as the isotopes are ''stable''). Much of radiochemistry deals with the use of radioactivity to study ordinary chemical reactions. This is very different from radiation chemistry where the radiation levels are kept too low to influence the chemistry. Radiochemistry includes the study of both natural and man-made radioisotopes. Main decay modes All radioisotopes are unstable isotopes of elements— that undergo nuclear decay and emit some form of radiation. The radiation emitted can be of several types including alpha, beta, gamma radiation, proton, and neutron emission along with neutrino and antiparticle emission decay pathways. 1. α (alpha) radiation—the emission of an alpha parti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fritz Strassmann
Friedrich Wilhelm Strassmann (; 22 February 1902 – 22 April 1980) was a German chemist who, with Otto Hahn in December 1938, identified the element barium as a product of the bombardment of uranium with neutrons. Their observation was the key piece of evidence necessary to identify the previously unknown phenomenon of nuclear fission, as was subsequently recognized and published by Lise Meitner and Otto Frisch. Personal life and education Strassman was born in Boppard, Germany, to Richard Strassman and Julie Strassmann (née Bernsmann). He was the youngest of nine children. Growing up in Düsseldorf, he developed an interest in chemistry at a young age and conducted chemistry experiments in his parents' home. His family was of modest means, and his father died at a young age, worsening the family's financial situation. Financial considerations limited Strassmann's initial choices of where to pursue his higher education and what subjects they should be. Strassmann began his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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