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Helianthemum Squamatum
''Helianthemum squamatum'' is a species of low woody herbaceous plant native to Spain and Algeria. It is the only known species able to extract water of crystallization from rock and is able to derive up to 90% of its fluid requirements from gypsum using this process. By comparing the isotope composition of the plant's sap water to the isotopic composition of free water in the soil and water of crystallization within gypsum it was discovered by Sara Palacio of the Instituto Pirenaico de Ecología and Juan Pedro Ferrio of the University of Lleida The University of Lleida (officially in Catalan: ''Universitat de Lleida'') is a university based in Lleida, Catalonia, Spain. It was the first university founded in Catalonia and in the ancient Crown of Aragon. It was founded in 1300, using the ... that between 70% and 90% of the sap water came from gypsum during the summer months. References squamatum Flora of Algeria Flora of Spain {{malvales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christiaan Hendrik Persoon
Christiaan Hendrik Persoon (1 February 1761 – 16 November 1836) was a German mycologist who made additions to Linnaeus' mushroom taxonomy. Early life Persoon was born in South Africa at the Cape of Good Hope, the third child of an immigrant Pomeranian father and Dutch mother. His mother died soon after he was born; at the age of thirteen his father (who died a year later) sent him to Europe for his education. Education Initially studying theology at Halle, at age 22 (in 1784) Persoon switched to medicine at Leiden and Göttingen. He received a doctorate from the "Kaiserlich-Leopoldinisch-Carolinische Deutsche Akademie der Naturforscher" in 1799. Later years He moved to Paris in 1802, where he spent the rest of his life, renting an upper floor of a house in a poor part of town. He was apparently unemployed, unmarried, poverty-stricken and a recluse, although he corresponded with botanists throughout Europe. Because of his financial difficulties, Persoon agreed to don ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plants Of The World Online
Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by 2020". The initial focus was on tropical African Floras, particularly Flora Zambesiaca, Flora of West Tropical Africa and Flora of Tropical East Africa. The database uses the same taxonomical source as Kew's World Checklist of Selected Plant Families, which is the International Plant Names Index, and the World Checklist of Vascular Plants (WCVP). POWO contains 1,234,000 global plant names and 367,600 images. See also *Australian Plant Name Index The Australian Plant Name Index (APNI) is an online database of all published names of Australian vascular plants. It covers all names, whether current names, synonyms or invalid names. It includes bibliographic and typification details, informati ... * Convention on Biological Diversity * W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Of Crystallization
In chemistry, water(s) of crystallization or water(s) of hydration are water molecules that are present inside crystals. Water is often incorporated in the formation of crystals from aqueous solutions. In some contexts, water of crystallization is the total mass of water in a substance at a given temperature and is mostly present in a definite (stoichiometric) ratio. Classically, "water of crystallization" refers to water that is found in the crystalline framework of a metal complex or a salt, which is not directly bonded to the metal cation. Upon crystallization from water, or water-containing solvents, many compounds incorporate water molecules in their crystalline frameworks. Water of crystallization can generally be removed by heating a sample but the crystalline properties are often lost. Compared to inorganic salts, proteins crystallize with large amounts of water in the crystal lattice. A water content of 50% is not uncommon for proteins. Applications Knowledge of h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gypsum
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula . It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard or sidewalk chalk, and drywall. Alabaster, a fine-grained white or lightly tinted variety of gypsum, has been used for sculpture by many cultures including Ancient Egypt, Mesopotamia, Ancient Rome, the Byzantine Empire, and the Nottingham alabasters of Medieval England. Gypsum also crystallizes as translucent crystals of selenite. It forms as an evaporite mineral and as a hydration product of anhydrite. The Mohs scale of mineral hardness defines gypsum as hardness value 2 based on scratch hardness comparison. Etymology and history The word '' gypsum'' is derived from the Greek word (), "plaster". Because the quarries of the Montmartre district of Paris have long furnished burnt gypsum ( calcined gypsum) used for various purposes, this dehydrated gyp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Lleida
The University of Lleida (officially in Catalan: ''Universitat de Lleida'') is a university based in Lleida, Catalonia, Spain. It was the first university founded in Catalonia and in the ancient Crown of Aragon. It was founded in 1300, using the name of ''Estudi General de Lleida''. It was reestablished on December 12, 1991, after a lapse of three hundred years, by the Catalan Parliament. In addition to the historical central edifice located in Rambla d'Aragó, new campuses and buildings have been added. History In 1297, Pope Boniface VIII authorized the establishment of a university in the Crown of Aragon. In 1300, James II of Aragon used the papal authorization to establish the Estudi General de Lleida. As the only university in the Crown of Aragon, the city of Lleida prospered when citizens from across the kingdom came to attend the new university. The school was funded by both the city of Lleida and the local the cathedral chapter. Lleida and the Studium Generale Llei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helianthemum
''Helianthemum'' , known as rock rose, sunrose, rushrose, or frostweed,''Helianthemum''. Integrated Taxonomic Information System (ITIS). is a of about 110''Helianthemum''. Flora of China. species of s in the |
Flora Of Algeria
Flora (: floras or florae) is all the plant life present in a particular region or time, generally the naturally occurring ( indigenous) native plants. The corresponding term for animals is ''fauna'', and for fungi, it is '' funga''. 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 Thurma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
