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Lyngbya Majuscula
''Lyngbya majuscula'' is a species of filamentous cyanobacteria in the genus '' Lyngbya''. It is named after the Dane Hans Christian Lyngbye. As a result of recent genetic analyses, several new genera were erected from the genus ''Lyngbya'': ''e.g.'', '' Moorea'', '' Limnoraphis'', '' Okeania'', '' Microseira'', and '' Dapis''. Almost 300 different secondary metabolites have been isolated from specimens identified as ''L. majuscula''. However, most of these studies lack a molecular identification of the samples. Several specimens identified as ''L. majuscula'' and collected in marine tropical regions are now classified as members of the genera ''Okeania'' and ''Moorea''. Antillatoxin Antillatoxin (ATX) is a potent lipopeptide neurotoxin produced by the marine cyanobacterium ''Lyngbya majuscula''. ATX activates voltage-gated sodium channels, which can cause cell depolarisation, NMDA-receptor overactivity, excess calcium influx ... and Kalkitoxin have been reported to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kalkitoxin
Kalkitoxin, a toxin derived from the cyanobacterium ''Lyngbya majuscula'', induces NMDA receptor mediated neuronal necrosis, blocks voltage-dependent sodium channels, and induces cellular hypoxia by inhibiting the electron transport chain (ETC) complex 1. Natural sources Kalkitoxin is an ichthyotoxin, derived from the cyanobacterium ''Lyngbya majuscula'' which covers sections of the coral reef. It typically forms mini-blooms and produces several metabolites, such as kalkitoxin, curacin-A and antillatoxin. Kalkitoxin has been found and purified near the coasts of Curaçao and Puerto Rico. Structure and reactivity Kalkitoxin is a lipopeptide toxin with a molecular weight of 366.604Da. Its chemical formula is C21H38N2OS. The structure contains two double bonds, a 2,4-disubstituted thiazoline ring system, and an additional carbonyl-group. These four groups each provide a degree of unsaturation, which causes kalkitoxin to have four degrees of unsaturation. The structure co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Henry Harvey
William Henry Harvey, FRS FLS (5 February 1811 – 15 May 1866) was an Irish botanist and phycologist who specialised in algae. Biography Harvey was born at Summerville near Limerick, Ireland, in 1811, the youngest of 11 children. His father Joseph Massey Harvey, was a Quaker and prominent merchant. William started his education at Ballitore School in County Kildare and by the age of 15 had already established algae as his over-riding interest.Papenfuss, G.F. 1976. pp.21–46. Landmarks in Pacific North American Marine Phycology. ''in'' Abbott, I.A. and Hollenberg, G.J. 1976. ''Marine Algae of California''. Stanford University Press, California. After leaving school he joined the family business. Harvey was an authority on algae and bryophytes ( mosses), and author of ''A Manual of the British Algae'' (1841), ''Phycologia Britannica'' (4 vols., 1846–51), ''Nereis Boreali-Americana.'' (3 parts 1852–85) and '' Phycologia Australica'' (5 vol., 1858–63). He spent several y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maurice Gomont
Maurice-Augustin Gomont (born 1839, in Rouen - died 1909, in Rouen) was a French phycologist. Works * Gomont, M (1892). "Monographie des Oscillariées (Nostocacées Homocystées). Deuxième partie. - Lyngbyées". Annales des Sciences Naturelles, Botanique. 7 (16). Honours * ''Gomontia'', which is a genus of green algae, in the family Gomontiaceae and also Gomontiellaceae, which is a family of cyanobacteria, were both named in 1888 by botanists Jean-Baptiste Édouard Bornet and Charles Henri Marie Flahault after Maurice Gomont. * ''Gomontiellaceae'' are a family of cyanobacteria Cyanobacteria (), also known as Cyanophyta, are a phylum of gram-negative bacteria that obtain energy via photosynthesis. The name ''cyanobacteria'' refers to their color (), which similarly forms the basis of cyanobacteria's common name, blu ..., with ''Gomontiella'', a species named in 1901. References 1839 births 1909 deaths Scientists from Rouen French phycologists {{France-bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Réunion
Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island of Madagascar and southwest of the island of Mauritius. , it had a population of 868,846. Like the other four overseas departments, Réunion also holds the status of a region of France, and is an integral part of the French Republic. Réunion is an outermost region of the European Union and is part of the eurozone. Réunion and the fellow French overseas department of Mayotte are the only eurozone regions located in the Southern Hemisphere. As in the rest of France, the official language of Réunion is French. In addition, a majority of the region's population speaks Réunion Creole. Toponymy When France took possession of the island in the seventeenth century, it was named Bourbon, after the dynasty that then ruled France. To break ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filamentous Cyanobacteria
Cyanobacterial morphology refers to the form or shape of cyanobacteria. Cyanobacteria are a large and diverse phylum of bacteria defined by their unique combination of pigments and their ability to perform oxygenic photosynthesis. Cyanobacteria often live in colonial aggregates that can take a multitude of forms. Of particular interest among the many species of cyanobacteria are those that live colonially in elongate hair-like structures, known as trichomes. These filamentous species can contain hundreds to thousands of cells. They often dominate the upper layers of microbial mats found in extreme environments such as hot springs, hypersaline water, deserts and polar regions, as well as being widely distributed in more mundane environments. Many filamentous species are also motile, gliding along their long axis, and displaying photomovement by which a trichome modulates its gliding according to the incident light. The latter has been found to play an important role in guidi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyngbya
''Lyngbya'' is a genus of cyanobacteria, unicellular autotrophs that form the basis of the oceanic food chain. As a result of recent genetic analyses, several new genera were erected from this genus: ''e.g.'', ''Moorea'', '' Limnoraphis'', '' Okeania'', '' Microseira'', and '' Dapis''. ''Lyngbya'' species form long, unbranching filaments inside a rigid mucilaginous sheath. Sheaths may form tangles or mats, intermixed with other phytoplankton species. They reproduce asexually. Their filaments break apart and each cell forms a new filament. The mats grow around atolls, salt marshes, or fresh water. Some ''Lyngbya'' species cause the human skin irritation called seaweed dermatitis. Some ''Lyngbya'' species can also temporarily monopolize aquatic ecosystems when they form dense, floating mats in the water. Ingestion of ''Lyngbya'' is potentially lethal. Most commonly, poisoning is caused by eating fish which have fed on ''Lyngbya'' or which have fed on other fish which have co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Denmark
) , song = ( en, "King Christian stood by the lofty mast") , song_type = National and royal anthem , image_map = EU-Denmark.svg , map_caption = , subdivision_type = Sovereign state , subdivision_name = Danish Realm, Kingdom of Denmark , established_title = History of Denmark#Middle ages, Consolidation , established_date = 8th century , established_title2 = Christianization , established_date2 = 965 , established_title3 = , established_date3 = 5 June 1849 , established_title4 = Faroese home rule , established_date4 = 24 March 1948 , established_title5 = European Economic Community, EEC 1973 enlargement of the European Communities, accession , established_date5 = 1 January 1973 , established_title6 = Greenlandic home rule , established_date6 = 1 May 1979 , official_languages = Danish language, Danish , languages_type = Regional languages , languages_sub = yes , languages = German language, GermanGerman is recognised as a protected minority language in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Christian Lyngbye
Hans Christian Lyngbye (29 June 1782 – 18 May 1837) was a Danish priest and botanist, specialising in algae. Life Hans Christian Lyngbye was born in Aalborg, Denmark, in 1782, the son of a teacher, Jens Michelsen Lyngbye. He attended the Latin school in Aalborg until 1802 when he took as his tutor a priest on the island of Vendsyssel. He studied botany and theology and graduated in 1812. He then worked with the botanist Niels Hofman Bang which awoke his interest in algae. He won a competition set by the University of Copenhagen and as a result, Hornemann paid for the printing of his work on algae, ''Tentamen Hydrophytologiæ Danica'', which was published in 1819. It contained meticulous descriptions of 321 species of marine algae with illustrations of 70, including 7 new genera and 50 new species, and raised awareness of the algal flora of Denmark, Norway, the Faroe Islands and Greenland. He visited the Faroe Islands in 1817 and wrote a treatise on pilot whales and whaling. He w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moorea (alga)
Moorea ( or ; Tahitian: ), also spelled Moorea, is a volcanic island in French Polynesia. It is one of the Windward Islands, a group that is part of the Society Islands, northwest of Tahiti. The name comes from the Tahitian word , meaning "yellow lizard": = lizard ; (from ) = yellow. An older name for the island is ', sometimes spelled or (among other spellings that were used by early visitors before Tahitian spelling was standardized). Early Western colonists and voyagers also referred to Moorea as ''York Island'' or ''Santo Domingo''. History Prehistory According to recent archaeological evidence, the Society Islands were probably settled from Samoa and Tonga around 200 CE.Patrick V. Kirch: ''On the Road of the Wind - An Archaeological History of the Pacific Islands Before European Contact'', University of California Press, Berkeley-Los Angeles-London 2000 Nine tribal principalities emerged in the enclosed valleys, which in turn were subdivided into individual cla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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