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Ana María Ragonese
Ana María Ragonese (2 July 1928 – 19 July 1999) was an Argentine botanist and paleobotanist. She researched plant anatomy, focusing on dicotyledons and the anatomy of the fruit and foliage of Frankeniaceae. Ragonese taught at the University of Buenos Aires and was a researcher for the National Scientific and Technical Research Council (CONICET). Later in her career, she conducted paleobotanical research at the Bernardino Rivadavia Natural Sciences Argentine Museum and worked at the Darwinian Institute of Botany. Early life and education Ana María Ragonese was born on 2 July 1928 in Buenos Aires. She attended the University of Buenos Aires, earning a doctorate in natural sciences at the Faculty of Exact and Natural Sciences in 1960. Botany career Ragonese taught plant anatomy at the University of Buenos Aires in the Faculty of Exact and Natural Sciences. She was an assistant to the chief of practical work and she became an adjunct professor, a position she held until 1974. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buenos Aires
Buenos Aires, controlled by the government of the Autonomous City of Buenos Aires, is the Capital city, capital and largest city of Argentina. It is located on the southwest of the Río de la Plata. Buenos Aires is classified as an Alpha− global city, according to the Globalization and World Cities Research Network, GaWC 2024 ranking. The city proper has a population of 3.1 million and its urban area 16.7 million, making it the List of metropolitan areas, twentieth largest metropolitan area in the world. It is known for its preserved eclecticism, eclectic European #Architecture, architecture and rich culture, cultural life. It is a multiculturalism, multicultural city that is home to multiple ethnic and religious groups, contributing to its culture as well as to the dialect spoken in the city and in some other parts of the country. This is because since the 19th century, the city, and the country in general, has been a major recipient of millions of Immigration to Argentina, im ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adesmia (plant)
''Adesmia'' is a genus of flowering plants in the legume family, Fabaceae. It was recently assigned to the informal monophyletic ''Adesmia'' clade within the Dalbergieae The tribe Dalbergieae is an early-branching clade within the flowering plant subfamily Faboideae (or Papilionaceae). Within that subfamily, it belongs to an unranked clade called the dalbergioids. It was recently revised to include many genera .... The species range across southern South America, from Peru and southeastern Brazil to Argentina and Chile. Species ''Adesmia'' comprises the following species: * '' Adesmia aconcaguensis'' Burkart * '' Adesmia acuta'' Burkart * '' Adesmia adrianii'' M.N. Correa * '' Adesmia aegiceras'' Phil. * '' Adesmia ameghinoi'' Speg. * '' Adesmia aphanantha'' Speg. * '' Adesmia aphylla'' Clos * '' Adesmia arachnipes'' Clos * '' Adesmia araucana'' Phil. * '' Adesmia araujoi'' Burkart * '' Adesmia arenicola'' (R.E. Fr.) Burkart * '' Adesmia argentea'' Meyen * '' Ades ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleobotanists
Paleobotany or palaeobotany, also known as paleophytology, is the branch of botany dealing with the recovery and identification of plant fossils from geological contexts, and their use for the biological reconstruction of past environments (paleogeography), and the evolutionary history of plants, with a bearing upon the evolution of life in general. It is a component of paleontology and paleobiology. The prefix ''palaeo-'' or ''paleo-'' means "ancient, old", and is derived from the Greek adjective , . Paleobotany includes the study of land plants, as well as the study of prehistoric marine photoautotrophs such as photosynthetic algae, seaweeds or kelp. A closely related field is palynology, which is the study of fossilized and extant spores and pollen. Paleobotany is important in the reconstruction of ancient ecological and climate systems, known as paleoecology and paleoclimatology respectively. It is fundamental to the study of green plant development and evolution. Paleobot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1999 Deaths
This is a list of lists of deaths of notable people, organized by year. New deaths articles are added to their respective month (e.g., Deaths in ) and then linked below. 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 Earlier years ''Deaths in years earlier than this can usually be found in the main articles of the years.'' See also * Lists of deaths by day * Deaths by year (category) {{DEFAULTSORT:deaths by year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1928 Births
Events January * January – British bacteriologist Frederick Griffith reports the results of Griffith's experiment, indirectly demonstrating that DNA is the genetic material. * January 1 – Eastern Bloc emigration and defection: Boris Bazhanov, Joseph Stalin's personal secretary, crosses the border to Iran to defect from the Soviet Union. * January 17 – The OGPU arrests Leon Trotsky in Moscow; he assumes a status of passive resistance and is exiled with his family. * January 26 – The volcanic island Anak Krakatau appears. February * February – The Ford River Rouge Complex at Dearborn, Michigan, an automobile plant begun in 1917, is completed as the world's largest integrated factory. * February 8 – Scottish-born inventor John Logie Baird broadcasts a transatlantic television signal from London to Hartsdale, New York. * February 11 – February 19, 19 – The 1928 Winter Olympics are held in St. Moritz, Switzerland, the first as a separate event. Sonja Henie of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Association Of Wood Anatomists
The International Association of Wood Anatomists (IAWA) is an association that studies wood anatomy formed in 1931. Their office is currently based in the Netherlands. They have been cited as a source by Mongabay, used as a supporting reference in plant biology books and their activities have been talked about by ABC Online The Australian Broadcasting Corporation (ABC) is Australia’s principal Public broadcasting, public service broadcaster. It is funded primarily by grants from the Australian Government, federal government and is administered by a government .... by [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elisa G
The enzyme-linked immunosorbent assay (ELISA) (, ) is a commonly used analytical biochemistry assay, first described by Eva Engvall and Peter Perlmann in 1971. The assay is a solid-phase type of enzyme immunoassay (EIA) to detect the presence of a ligand (commonly an amino acid) in a liquid sample using antibodies directed against the ligand to be measured. ELISA has been used as a diagnostic tool in medicine, plant pathology, and biotechnology, as well as a quality control check in various industries. In the most simple form of an ELISA, antigens from the sample to be tested are attached to a surface. Then, a matching antibody is applied over the surface so it can bind the antigen. This antibody is linked to an enzyme, and then any unbound antibodies are removed. In the final step, a substance containing the enzyme's substrate is added. If there was binding, the subsequent reaction produces a detectable signal, most commonly a color change. Performing an ELISA involves at leas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spermatophyte
A seed plant or spermatophyte (; New Latin ''spermat-'' and Greek ' (phytón), plant), also known as a phanerogam (taxon Phanerogamae) or a phaenogam (taxon Phaenogamae), is any plant that produces seeds. It is a category of embryophyte (i.e. land plant) that includes most of the familiar land plants, including the flowering plants and the gymnosperms, but not ferns, mosses, or algae. The term ''phanerogam'' or ''phanerogamae'' is derived from the Ancient Greek, Greek (), meaning "visible", in contrast to the term "cryptogam" or "cryptogamae" (, and (), 'to marry'). These terms distinguish those plants with hidden sexual organs (cryptogamae) from those with visible ones (phanerogamae). Description The extant spermatophytes form five divisions, the first four of which are classified as gymnosperms, plants that have unenclosed, "naked seeds": * Cycadophyta, the cycads, a subtropical and tropical group of plants, * Ginkgophyta, which includes a single living species of tree in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araliaceae
The Araliaceae are a family of flowering plants composed of about 43 genera and around 1500 species consisting of primarily woody plants and some herbaceous plants commonly called the ginseng family. The morphology of Araliaceae varies widely, but it is predominantly distinguishable based on its woody habit, tropical distribution, and the presence of simple umbels. There are numerous plants of economic importance. Some genera, such as ''Hedera'' (the ivies), '' Fatsia'' (Japanese aralias) and '' Heptapleurum'' (formerly ''Schefflera'', the umbrella trees), are used as ornamental foliage plants. The family also includes '' Panax ginseng'', the root of which is ginseng, used in traditional Chinese medicine. Overview The morphology of Araliaceae varies widely. Many studies have found that there is no unifying characteristic capable of classifying the family. In general, Araliaceae species have large, usually alternate leaves, often with aromatic ethereal oils, five-petaled fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myrtaceae
Myrtaceae (), the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All species are woody, contain essential oils, and have flower parts in multiples of four or five. The leaves are evergreen, alternate to mostly opposite, simple, and usually entire (i.e., without a toothed margin). The flowers have a base number of five petals, though in several genera, the petals are minute or absent. The stamens are usually very conspicuous, brightly coloured, and numerous. Evolutionary history Scientists hypothesize that the family Myrtaceae arose between 60 and 56 million years ago (Mya) during the Paleocene era. Pollen fossils have been sourced to the ancient supercontinent Gondwana. The breakup of Gondwana during the Cretaceous period (145 to 66 Mya) geographically isolated disjunct taxa and allowed for rapid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteraceae
Asteraceae () is a large family (biology), family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the Order (biology), order Asterales. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger family is unclear as the quantity of Extant taxon, extant species in each family is unknown. The Asteraceae were first described in the year 1740 and given the original name Composita, Compositae. The family is commonly known as the aster, Daisy (flower), daisy, composite, or sunflower family. Most species of Asteraceae are herbaceous plants, and may be Annual plant, annual, Biennial plant, biennial, or Perennial plant, perennial, but there are also shrubs, vines, and trees. The family has a widespread distribution, from subpolar to tropical regions, in a wide variety of habitats. Most occur in Hot desert climate, hot desert and cold or hot Semi-arid climate, semi-desert climates, and they are found on ever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
