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Folke K. Skoog
Folke Karl Skoog (July 15, 1908 – February 15, 2001) was a Swedish-born American plant physiologist who was a pioneer in the field of plant growth regulators, particularly cytokinins. Skoog was a recipient of the National Medal of Science 1991. Born in Halland, Sweden, Skoog emigrated to the United States during a trip to California in 1925, and was naturalized as a citizen almost a decade later. He competed, and finished sixth in heat 2, in the 1500 meter race during the 1932 Summer Olympics. In 1936, he received his PhD in biology from Caltech for his work done with auxin, a plant hormone. In 1937, Skoog was a postdoctoral researcher with Dennis Robert Hoagland, and his professional career advanced significantly with his arrival at the University of Wisconsin–Madison in 1947. Carlos O. Miller discovered kinetin in 1954, and benzyladenine and related compounds were later synthesized in Skoog's lab. In 1962, Skoog and Toshio Murashige published what is probably the best ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halland
Halland () is one of the traditional provinces of Sweden (''landskap''), on the western coast of Götaland, southern Sweden. It borders Västergötland, Småland, Scania and the sea of Kattegat. Until 1645 and the Second Treaty of Brömsebro, it was part of the Kingdom of Denmark. Its name means ''Land of Rocky Slabs'' (Swedish: ''hällar'') referring to the coastal cliffs of the region. Administration The provinces of Sweden serve no administrative function. Instead, that function is served by the Counties of Sweden. However, the province of Halland is almost coextensive with the administrative Halland County, though parts of the province belong to Västra Götaland County and Skåne County, while the county also includes parts of Småland and Västergötland. As of 31 December 2016 Halland had a population of 327,093. Of these, 310,536 lived in Halland County; 14,205 lived in Västra Götaland County; and 2,352 lived in Skåne County. Heraldry During the Danish era unt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cytokinins
Cytokinins (CK) are a class of plant hormones that promote cell division, or cytokinesis, in plant roots and shoots. They are involved primarily in cell growth and differentiation, but also affect apical dominance, axillary bud growth, and leaf senescence. There are two types of cytokinins: adenine-type cytokinins represented by kinetin, zeatin, and 6-benzylaminopurine, and phenylurea-type cytokinins like diphenylurea and thidiazuron (TDZ). Most adenine-type cytokinins are synthesized in roots. Cambium and other actively dividing tissues also synthesize cytokinins. No phenylurea cytokinins have been found in plants. Cytokinins participate in local and long-distance signalling, with the same transport mechanism as purines and nucleosides. Typically, cytokinins are transported in the xylem. Cytokinins act in concert with auxin, another plant growth hormone. The two are complementary, having generally opposite effects. History The idea of specific substances required for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regina Nuzzo
Regina Nuzzo is a professor of statistics at Gallaudet University in Washington D.C., a liberal arts school for deaf and hard-of-hearing students. She also writes articles about the importance of statistical and science communication and is an advocate for people with disabilities in the science and technology field. Education Nuzzo graduated from the University of South Florida with a Bachelor's degree in industrial engineering and went on to obtain her Ph.D in statistics from Stanford University in 2004, supervised by Richard A. Olshen. Her dissertation was written on the usage of stochastic models in bio-chemistry. Nuzzo also graduated from the University of California Santa Cruz's science writing program, where she learned how to write effectively for a variety of audiences about science and technology. Career Nuzzo has been a faculty member at Gallaudet University since 2006. She has written multiple articles for publication in major magazines, including WIRED magazine, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tobacco
Tobacco is the common name of several plants in the genus '' Nicotiana'' of the family Solanaceae, and the general term for any product prepared from the cured leaves of these plants. More than 70 species of tobacco are known, but the chief commercial crop is ''N. tabacum''. The more potent variant ''N. rustica'' is also used in some countries. Dried tobacco leaves are mainly used for smoking in cigarettes and cigars, as well as pipes and shishas. They can also be consumed as snuff, chewing tobacco, dipping tobacco, and snus. Tobacco contains the highly addictive stimulant alkaloid nicotine as well as harmala alkaloids. Tobacco use is a cause or risk factor for many deadly diseases, especially those affecting the heart, liver, and lungs, as well as many cancers. In 2008, the World Health Organization named tobacco use as the world's single greatest preventable cause of death. Etymology The English word ''tobacco'' originates from the Spanish word "tabaco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinetin
Kinetin (/'kaɪnɪtɪn/) is a type of cytokinin, a class of plant hormone that promotes cell division. Kinetin was originally isolated by Carlos Miller and Skoog ''et al.'' as a compound from autoclaved herring sperm DNA that had cell division-promoting activity. It was given the name kinetin because of its ability to induce cell division, provided that auxin was present in the medium. Kinetin is often used in plant tissue culture for inducing formation of callus (in conjunction with auxin) and to regenerate shoot tissues from callus (with lower auxin concentration). For a long time, it was believed that kinetin was an artifact produced from the deoxyadenosine residues in DNA, which degrade on standing for long periods or when heated during the isolation procedure. Therefore, it was thought that kinetin does not occur naturally, but, since 1996, it has been shown by several researchers that kinetin exists naturally in the DNA of cells of almost all organisms tested so far, incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carlos O
Carlos may refer to: Places ;Canada * Carlos, Alberta, a locality ;United States * Carlos, Indiana, an unincorporated community * Carlos, Maryland, a place in Allegany County * Carlos, Minnesota, a small city * Carlos, West Virginia ;Elsewhere * Carlos (crater), Montes Apenninus, LQ12, Moon; a lunar crater near Mons Hadley People * Carlos (given name), including a list of name holders * Carlos (surname), including a list of name holders Sportspeople * Carlos (Timorese footballer) (born 1986) * Carlos (footballer, born 1995), Brazilian footballer * Carlos (footballer, born 1985), Brazilian footballer Others * Carlos (Calusa) (died 1567), king or paramount chief of the Calusa people of Southwest Florida * Carlos (DJ) (born 1966), British DJ * Carlos (singer) (1943—2008), French entertainer * Carlos the Jackal, a Venezuelan terrorist *Carlos (DJ) (born 2010) Guyanese DJ Arts and entertainment * ''Carlos'' (miniseries), 2010 biopic about the terrorist Carlos the Jackal * ''C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Wisconsin–Madison
A university () is an educational institution, institution of higher education, higher (or Tertiary education, tertiary) education and research which awards academic degrees in several Discipline (academia), academic disciplines. Universities typically offer both undergraduate education, undergraduate and postgraduate education, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dennis Robert Hoagland
Dennis Robert Hoagland (April 2, 1884 – September 5, 1949) was an American chemist and plant scientist working in the fields of plant nutrition, agricultural chemistry, and physiology. He was Professor of Plant Nutrition at the University of California at Berkeley from 1927 until his death in 1949. Hoagland is commonly known for discovering the active transport of nutrients in plants, using innovative model systems under controlled experimental conditions, such as solution culture. He and his associates formulated an artificial, complete inorganic nutrient medium, universally known as Hoagland solution, that is still widely used for culturing plants hydroponically. Biography Private life Dennis Hoagland was the son of Charles Breckinridge Hoagland (1859 – 1934) and Lillian May Hoagland (1863 – 1951). He spent his first eight years in Golden and during his later childhood he lived in Denver. He attended the Denver public schools and in 1903 entered Stanford U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Postdoctoral Researcher
A postdoctoral fellow, postdoctoral researcher, or simply postdoc, is a person professionally conducting research after the completion of their doctoral studies (typically a PhD). The ultimate goal of a postdoctoral research position is to pursue additional research, training, or teaching in order to have better skills to pursue a career in academia, research, or any other field. Postdocs often, but not always, have a temporary academic appointment, sometimes in preparation for an academic faculty position. They continue their studies or carry out research and further increase expertise in a specialist subject, including integrating a team and acquiring novel skills and research methods. Postdoctoral research is often considered essential while advancing the scholarly mission of the host institution; it is expected to produce relevant publications in peer-reviewed academic journals or conferences. In some countries, postdoctoral research may lead to further formal qualificati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auxin
Auxins (plural of auxin ) are a class of plant hormones (or plant-growth regulators) with some morphogen-like characteristics. Auxins play a cardinal role in coordination of many growth and behavioral processes in plant life cycles and are essential for plant body development. The Dutch biologist Frits Warmolt Went first described auxins and their role in plant growth in the 1920s. Kenneth V. Thimann became the first to isolate one of these phytohormones and to determine its chemical structure as indole-3-acetic acid (IAA). Went and Thimann co-authored a book on plant hormones, ''Phytohormones'', in 1937. Overview Auxins were the first of the major plant hormones to be discovered. They derive their name from the Greek word αυξειν (''auxein'' – "to grow/increase"). Auxin is present in all parts of a plant, although in very different concentrations. The concentration in each position is crucial developmental information, so it is subject to tight regulation through both meta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1932 Summer Olympics
The 1932 Summer Olympics (officially the Games of the X Olympiad and also known as Los Angeles 1932) were an international multi-sport event held from July 30 to August 14, 1932 in Los Angeles, California, United States. The Games were held during the worldwide Great Depression, with some nations not traveling to Los Angeles; 37 nations competed, compared to the 46 in the 1928 Games in Amsterdam, and then-U.S. President Herbert Hoover did not attend the Games. The organizing committee did not report the financial details of the Games, although contemporary newspapers claimed that the Games had made a profit of US$1,000,000. Host city selection The selection of the host city for the 1932 Summer Olympics was made at the 23rd IOC Session in Rome, Italy, on 9 April 1923. Remarkably, the selection process consisted of a single bid, from Los Angeles, and as there were no bids from any other city, Los Angeles was selected by default to host the 1932 Games. Highlights *Charles Cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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