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Sergio Archangelsky
Sergio Archangelsky (27 March 1931 – 10 July 2022) was an Argentine paleobotanist and palynologist. He was a pioneer of modern paleobotany in Argentina, as well as of cuticular morphology and ultrastructure. He was also a corresponding member of the Argentine Academy of Science. Biography Sergio Archangelsky was born on 27 March 1931. He obtained his master's degree in geology (1954) and his doctorate (1957) at the University of Buenos Aires. While preparing for his doctorate, he started working in Tucumán (1955–61), at the Lillo Foundation, where he later will become Professor of Paleontology and geology. Thanks to a fellowship from the British Council, he was able to visit Britain, where he spent time working at the University of Glasgow, the University of Reading, and the Natural History Museum in London, where he interacted and collaborated with Thomas Harris. In 1961 he became a member of the CONICET and was Professor of Paleobotany at the Museum of Natural Sciences ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Casablanca
Casablanca, also known in Arabic as Dar al-Bayda ( ar, الدَّار الْبَيْضَاء, al-Dār al-Bayḍāʾ, ; ber, ⴹⴹⴰⵕⵍⴱⵉⴹⴰ, ḍḍaṛlbiḍa, : "White House") is the largest city in Morocco and the country's economic and business center. Located on the Atlantic Ocean, Atlantic coast of the Chaouia (Morocco), Chaouia plain in the central-western part of Morocco, the city has a population of about 3.71 million in the urban area, and over 4.27 million in the Greater Casablanca, making it the most populous city in the Maghreb region, and the List of largest cities in the Arab world, eighth-largest in the Arab world. Casablanca is Morocco's chief port, with the Port of Casablanca being one of the largest artificial ports in the world, and the second largest port in North Africa, after Tanger-Med ( east of Tangier). Casablanca also hosts the primary naval base for the Royal Moroccan Navy. Casablanca is considered a Global Financial Centre, ranking 54th g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Scientific And Technical Research Council
National may refer to: Common uses * Nation or country ** Nationality – a ''national'' is a person who is subject to a nation, regardless of whether the person has full rights as a citizen Places in the United States * National, Maryland, census-designated place * National, Nevada, ghost town * National, Utah, ghost town * National, West Virginia, unincorporated community Commerce * National (brand), a brand name of electronic goods from Panasonic * National Benzole (or simply known as National), former petrol station chain in the UK, merged with BP * National Car Rental, an American rental car company * National Energy Systems, a former name of Eco Marine Power * National Entertainment Commission, a former name of the Media Rating Council * National Motor Vehicle Company, Indianapolis, Indiana, USA 1900-1924 * National Supermarkets, a defunct American grocery store chain * National String Instrument Corporation, a guitar company formed to manufacture the first resonator g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2022 Deaths
The following notable deaths occurred in 2022. Names are reported under the date of death, in alphabetical order. A typical entry reports information in the following sequence: * Name, age, country of citizenship at birth, subsequent nationality (if applicable), what subject was noted for, cause of death (if known), and reference. December 25 * Chalapathi Rao, 78, Indian actor and producer, heart attack. (death announced on this date) 24 *Vittorio Adorni, 85, Italian road racing cyclist. *Cotton Davidson, 91, American football player ( Baltimore Colts, Dallas Texans, Oakland Raiders). (death announced on this date) *Franco Frattini, 65, Italian politician and magistrate, twice minister of foreign affairs, twice of public administration, European commissioner for justice (2004–2008), cancer. *Madosini, 78, South African musician. *Barry Round, 72, Australian footballer (Sydney, Footscray, Williamstown), organ failure. *Royal Applause, 29, British Thoroughbred racehorse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1931 Births
Events January * January 2 – South Dakota native Ernest Lawrence invents the cyclotron, used to accelerate particles to study nuclear physics. * January 4 – German pilot Elly Beinhorn begins her flight to Africa. * January 22 – Sir Isaac Isaacs is sworn in as the first Australian-born Governor-General of Australia. * January 25 – Mohandas Gandhi is again released from imprisonment in India. * January 27 – Pierre Laval forms a government in France. February * February 4 – Soviet leader Joseph Stalin gives a speech calling for rapid industrialization, arguing that only strong industrialized countries will win wars, while "weak" nations are "beaten". Stalin states: "We are fifty or a hundred years behind the advanced countries. We must make good this distance in ten years. Either we do it, or they will crush us." The first five-year plan in the Soviet Union is intensified, for the industrialization and collectivization of agriculture. * February 10 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ticoa
''Ticoa'' is an extinct genus originally assigned to the Cycadales from the Early Cretaceous of Argentina, Chile, and Antarctica. Other authors view this genus as a member of the polyphyletic "seed ferns". Taxonomy The genus was erected by Sergio Archangelsky based on material from the Anfiteatro de Ticó formation. The genus first comprised two species, ''T. harrisii'' and ''T. magnipinnulata,'' with ''T. lamellata'' being described from the Bajo Grande locality in Patagonia, Argentina. The species ''T. magallanica'' was described from the Springhill formation in Chile. ''T. jeffersonii'' was described from Hope Bay in Antarctica. ''T. lanceolata'' was described much later from the Anfiteatro de Ticó formation . Description ''Ticoa'' includes large, bipinnate or tripinnate leaves with pecopteroid pinnules and a robust rachis. The cuticle, either hypostomatous or amphistomatous, presents large stomata sunken in a pit formed by multiple subsidiary A subsidiary, subsidiary com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruflorinia
''Ruflorinia'' is a genus of fossilized foliage from the Early Cretaceous of Argentina assigned to the order Caytoniales. Taxonomy The genus was first established by Sergio Archangelsky based on material from the Anfiteatro de Ticó Formation, Santa Cruz, Argentina, with the type species being ''Ruflorinia sierra''. The genus name celebrated the Swedish paleobotanist Rudolf Florin. Other two species (''R. pilifera'' and ''R. papillosa'') were later described from the Anfiteatro de Ticó and another (''R.orlandoi'') was later described from the Springhill Formation in Argentina. Paleoecology In the Anfiteatro de Ticó Formation, leaves of this genus are found in association with the ovulate organ ''Ktalenia'', and the conifer ''Brachyphyllum ''Brachyphyllum'' (meaning "short leaf") is a form genus of fossil coniferous plant foliage. Plants of the genus have been variously assigned to several different conifer groups including Araucariaceae and Cheirolepidiaceae. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesosingeria
''Mesosingeria'' is a genus of fossil foliage attributable to the Cycadales. This genus is found in Early Cretaceous rocks from Argentina. Taxonomy The genus was erected by Sergio Archangelsky based on material from the Anfiteratro de Ticó Formation in Argentina to include two species, namely ''M.coriacea'' and ''M. herbstii''. The name of the genus is dedicated to the mycologist Rolf Singer Rolf Singer (June 23, 1906 – January 18, 1994) was a Germany, German-born mycologist and one of the most important Taxonomy (biology), taxonomists of gilled mushrooms (agarics) in the 20th century. After receiving his Ph.D. at the University .... Other five species were later added to the genus from the same localities. Description The genus includes foliage fossils of bipinnate leaves with a flat rachis. The pinnules are oblong to lanceolate, alternate, with one or more veins entering each pinnule, then dichotomizing and continuing straight to the apex. The cuticle presents m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesodescolea
''Mesodescolea'' is a genus of fossil foliage with uncertain affinities from the Early Cretaceous of Argentina and Antarctica. It includes only one species, ''Mesodescolea plicata''. Taxonomy The genus was first erected by Sergio Archangelsky based on material from the Aptian of the Anfiteatro de Ticó formation. The name of the genus is dedicated to the naturalist Horacio Descole. Although it was originally compared to cycadalean genera such as '' Ctenis'' and ''Stangeria'', its affinities were originally considered uncertain. Later reinvestigations and emendations cemented the view that ''Mesodescolea'' was a member of the Cycadales family Stangeriaceae. Other authors have proposed that the genus represents a member of the angiosperms with affinities with the ANA grade or Chloranthaceae. Description The genus includes leaves with highly lobed-dissected margins. The venation is hierarchical, with the tertiary veins forming an irregular reticulum. Chloranthoid teet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southern subregion of a single continent called America. South America is bordered on the west by the Pacific Ocean and on the north and east by the Atlantic Ocean; North America and the Caribbean Sea lie to the northwest. The continent generally includes twelve sovereign states: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela; two dependent territories: the Falkland Islands and South Georgia and the South Sandwich Islands; and one internal territory: French Guiana. In addition, the ABC islands of the Kingdom of the Netherlands, Ascension Island (dependency of Saint Helena, Ascension and Tristan da Cunha, a British Overseas Territory), Bouvet Island ( dependency of Norway), Pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anfiteatro De Ticó Formation
The Anfiteatro de Ticó Formation is a geological formation from the Deseado Massif in the province of Santa Cruz, Argentina. Paleobiology The Anfiteatro de Ticó preserves a rich and diverse flora including macrofossils, mesofossils, and microfossils. These have been object of detailed investigations since the 1960'. Depositional environments The formation is of continental origin, and includes riparian and lacustrine deposits. Fossil content The following fossils were reported from the formation:Anfiteatro de Ticó Formation at .org Flora [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmission Electron Microscopy
Transmission electron microscopy (TEM) is a microscopy technique in which a beam of electrons is transmitted through a specimen to form an image. The specimen is most often an ultrathin section less than 100 nm thick or a suspension on a grid. An image is formed from the interaction of the electrons with the sample as the beam is transmitted through the specimen. The image is then magnified and focused onto an imaging device, such as a fluorescent screen, a layer of photographic film, or a sensor such as a scintillator attached to a charge-coupled device. Transmission electron microscopes are capable of imaging at a significantly higher resolution than light microscopes, owing to the smaller de Broglie wavelength of electrons. This enables the instrument to capture fine detail—even as small as a single column of atoms, which is thousands of times smaller than a resolvable object seen in a light microscope. Transmission electron microscopy is a major analytical method i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
