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Chorisodontium Aciphyllum
''Chorisodontium aciphyllum'' is a species of moss found primarily on both sides of the Drake Passage. The species exhibits an extreme degree of cryptobiosis – the ability of a life form to enter a non- metabolic state, extending life indefinitely. Description ''Chorisodontium aciphyllum'' grows in banks along the Antarctic coast in the Drake Passage region. It has also been found in Argentina, Chile, Antarctica, New Zealand, and South Georgia. As the moss banks grow taller, the layers more than an inch below the surface turn brown from lack of sun exposure and eventually become part of the permafrost. The mounds of moss can grow to be more than tall. ''Chorisodontium aciphyllum'' was first described by Joseph Dalton Hooker and William M. Wilson in 1844 as ''Dicranum aciphyllum'' in the '' London Journal of Botany''. Viktor Ferdinand Brotherus reclassified the species into its current genus in 1924. Cryptobiosis In 2014, terrestrial ecologist Peter Convey and his col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viktor Ferdinand Brotherus
Viktor Ferdinand Brotherus (28 October 1849 – 9 February 1929), Finnish botanist who studied the mosses (Bryophyta), best known for authoring the treatment of 'Musci' in Adolf Engler, Engler and Karl Anton Eugen Prantl, Prantl's ''Die Natürlichen Pflanzenfamilien, Die Naturlichen Pflanzenfamilien''. Personal life Brotherus was born in Skarpans in Sund, Åland while Finland was under Grand Duchy of Finland, Russian rule. He had 13 brothers and sisters of whom six died young. He took his Candidate of Philosophy degree in 1870 at Imperial Alexander University (later University of Helsinki) and began medical studies but gave them up after getting Blood-poisoning, blood poisoning and became a teacher. He married Aline Mathilde Sandman (born 1853), daughter of Jonas Sandman, a Justice in the Court of Appeal, in 1879 at the age of thirty, and had four children. She died in 1894 and he did not remarry. He taught natural history and mathematics at the Swedish girls' school in Vaasa City ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio-carbon Dating
Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was developed in the late 1940s at the University of Chicago by Willard Libby. It is based on the fact that radiocarbon () is constantly being created in the Earth's atmosphere by the interaction of cosmic rays with atmospheric nitrogen. The resulting combines with atmospheric oxygen to form radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then acquire by eating the plants. When the animal or plant dies, it stops exchanging carbon with its environment, and thereafter the amount of it contains begins to decrease as the undergoes radioactive decay. Measuring the amount of in a sample from a dead plant or animal, such as a piece of wood or a fragment of bone, provides information that can be used to calcu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of Argentina
The Environment of Argentina is characterised by high biodiversity. Biodiversity Subtropical plants dominate the Gran Chaco in the north, with the ''Dalbergia'' genus of trees well represented by Brazilian rosewood and the quebracho tree; also predominant the wacho white and black algarrobo trees ('' Prosopis alba'' and ''Prosopis nigra''). Savannah-like areas exist in the drier regions nearer the Andes. Aquatic plants thrive in the wetlands of Argentina. In central Argentina the ''humid pampas'' are a true tallgrass prairie ecosystem. The original pampa had virtually no trees; some imported species like the American sycamore or eucalyptus are present along roads or in towns and country estates (''estancias''). The only tree-like plant native to the pampa is the evergreen Ombú. The surface soils of the pampa are a deep black color, primarily mollisols, known commonly as ''humus''. This makes the region one of the most agriculturally productive on Earth; however, this is also res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of Chile
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' gut flora'' or '' skin flora''. Etymology The word "flora" comes from the Latin name of Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and flora (the taxonomic composition of a community) was first made by Jules Thurmann (1849). Prior to this, the two terms were used indiscriminately.Thurmann, J. (1849). ''Essai de Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of South Georgia Island
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms ''gut flora'' or ''skin flora''. Etymology The word "flora" comes from the Latin name of Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and flora (the taxonomic composition of a community) was first made by Jules Thurmann (1849). Prior to this, the two terms were used indiscriminately.Thurmann, J. (1849). ''Essai de Phyt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of Antarctica
Antarctic flora are a distinct community of vascular plants which evolved millions of years ago on the supercontinent of Gondwana. Presently, species of Antarctica flora reside on several now separated areas of the Southern Hemisphere, including southern South America, southernmost Africa, New Zealand, Australia, and New Caledonia. Joseph Dalton Hooker (1817 – 1911) was the first to notice similarities in the flora and speculated that Antarctica had served as either a source or a transitional point, and that land masses now separated might formerly have been adjacent. Based on the similarities in their flora, botanist Ronald D'Oyley Good identified a separate Antarctic Floristic Kingdom that included southern South America, New Zealand, and some southern island groups. In addition, Australia was determined to be its own floristic kingdom because of the influx of tropical Eurasian flora that had mostly supplanted the Antarctic flora and included New Guinea and New Caledonia in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypnales
Hypnales is the botanical name of an order of Bryophyta or leafy mosses. This group is sometimes called feather mosses, referring to their freely branched stems. The order includes more than 40 families and more than 4,000 species, making them the largest order of mosses. Description Hypnales are mosses with pinnately or irregularly branched, reclining stems, with varying appearances. The stem contains only a reduced central vascular bundle, which is seen as a recent derived trait in mosses. The stems are covered with paraphyllia or pseudoparaphyllia, reduced filamentous or scaly leaves. The ordinary stem leaves are ovate to lanceolate, often with leaf wing cells. The midvein is often limited to the lower half of the leaf blade, or has completely disappeared. The cells of the leaf blade are prosenchymatic, many times longer than wide, with pointed ends interlocking. The sporophyte consists of a regularly shaped sporangium on a long stalk or seta. The spores are distribut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silene Stenophylla
''Silene stenophylla'' is a species of flowering plant in the family Caryophyllaceae. Commonly called narrow-leafed campion, it is a species in the genus ''Silene''. It grows in the Arctic tundra of far eastern Siberia and the mountains of northern Japan. Frozen samples, estimated via radiocarbon dating to be around 32,000 years old, were discovered in the same area as current living specimens, and in 2012, a team of scientists successfully regenerated a plant from the samples. Habitat and description ''S. stenophylla'' grows in the Arctic tundra of far eastern Siberia and the mountains of northern Japan. It is typically tall, has narrow leaves, and a large calyx. It blooms during the summer and has incised petals that are lilac, light pink, or white in color. It is a perennial that grows on stony cliffs and sandy shores. ''S. stenophylla'' is one of a few Beringian plant species that did not establish itself in North America. Etymology The specific epithet is derived from th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petri Dish
A Petri dish (alternatively known as a Petri plate or cell-culture dish) is a shallow transparent lidded dish that biologists use to hold growth medium in which cells can be cultured,R. C. Dubey (2014): ''A Textbook Of Biotechnology For Class-XI'', 4th edition, p. 469. originally, cells of bacteria, fungi and small mosses. The container is named after its inventor, German bacteriologist Julius Richard Petri. It is the most common type of culture plate. The Petri dish is one of the most common items in biology laboratories and has entered popular culture. The term is sometimes written in lower case, especially in non-technical literature. What was later called Petri dish was originally developed by German physician Robert Koch in his private laboratory in 1881, as a precursor method. Petri, as assistant to Koch, at Berlin University made the final modifications in 1887 as used today. Penicillin, the first antibiotic, was discovered in 1929 when Alexander Fleming noticed that m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ellesmere Island
Ellesmere Island ( iu, script=Latn, Umingmak Nuna, lit=land of muskoxen; french: île d'Ellesmere) is Canada's northernmost and List of Canadian islands by area, third largest island, and the List of islands by area, tenth largest in the world. It comprises an area of , slightly smaller than Great Britain, and the total length of the island is . Lying within the Arctic Archipelago, Ellesmere Island is considered part of the Queen Elizabeth Islands. Cape Columbia at 83°06′ is the northernmost point of land in Canada and one of the northernmost points of land on the planet (the northernmost point of land on Earth is the nearby Kaffeklubben Island of Greenland). The Arctic Cordillera mountain system covers much of Ellesmere Island, making it the most mountainous in the Arctic Archipelago. More than one-fifth of the island is protected as Quttinirpaaq National Park. In 2021, the population of Ellesmere Island was recorded at 144. There are three settlements: Alert, Nunavut, Aler ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teardrop Glacier
A teardrop is a drop (liquid) of tears. Teardrop or Teardrops may also refer to: Biology * Vastus medialis, a muscle in the leg sometimes referred to as the teardrop muscle * A feature in X-rays of the pelvis Music Musical Groups * The Teardrops, or Magic Slim and The Teardrops, a Chicago band * The Teardrops (UK band), a post-punk band from Manchester, England * The Teardrops (girl group), a 1960s girl group from Cincinnati, Ohio Instruments * The unofficial name of the Mark III, and Mark VI electric guitars made by Vox Albums * ''Teardrops'' (album), a 2010 album by Tom Dice Songs * "Tear Drops", a 1957 song by Lee Andrews & the Hearts * "Tear Drop", a 1959 US#23 Santo & Johnny instrumental * "Teardrops" (George Harrison song), a 1981 song on George Harrison's album ''Somewhere In England'' * "Teardrops" (Shakin' Stevens song), a 1984 song on Shakin' Stevens compilation album ''Greatest Hits'' * "Teardrops" (Womack & Womack song), a 1988 song on Womack & Womack's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Current Biology
''Current Biology'' is a biweekly peer-reviewed scientific journal that covers all areas of biology, especially molecular biology, cell biology, genetics, neurobiology, ecology, and evolutionary biology. The journal includes research articles, various types of review articles, as well as an editorial magazine section. The journal was established in 1991 by the Current Science group, acquired by Elsevier in 1998 and has since 2001 been part of Cell Press, a subdivision of Elsevier. According to ''Journal Citation Reports'', the journal has a 2020 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as i ... of 10.834. It was categorized as a "high impact journal" by the Superfund Research Program. References External links * Biology journals English-language journals Cell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
