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Silene (other)
''Silene'' is a genus of plants. Silene may also refer to: * Silenes, chemical compounds containing a Si=Si moiety * Silenes (Si=C), chemical compounds containing a Si=C moiety * Silene, the location of the story of Saint George and the Dragon * , one of the lands of the historical Semigallia, Latvia * , a village in Skrudaliena Parish, Lativa * , a village in Salienas Parish, Lativa See also * Silylene, another class of silicon compounds * Silanes * Selene (other) * Seline (other) * Silen (other) Silen may refer to: * Silen, Bulgaria, a village in Bulgaria * Silen language, a language of Indonesia * Johan Silén, Finnish sailor * William Silen, Puerto Rican athlete See also * Silenus, in Greek mythology * Silene (other) * Si ... * Sylene {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silene
''Silene'' is a genus of flowering plants in the family Caryophyllaceae. Containing nearly 900 species, it is the largest genus in the family. Common names include campion and catchfly. Many ''Silene'' species are widely distributed, particularly in the northern hemisphere. Scientific history Members of this genus have been the subject of research by preeminent plant ecologists, evolutionary biologists, and geneticists, including Charles Darwin, Gregor Mendel, Carl Correns, Herbert G. Baker, and Janis Antonovics. Many ''Silene'' species continue to be widely used to study systems, particularly in the fields of ecology and evolutionary biology.Bernasconi et al. 2009. Silene as a model system in ecology and evolution. Heredity. 103:5-14. PMI19367316/ref> The genus has been used as a model for understanding the genetics of sex determination for over a century. ''Silene'' species commonly contain a mixture of hermaphroditic and female (or male-sterile) individuals (gynodioecy), a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silenes
Silene, or disilalkenes,Philip P. Power "pi-Bonding and the Lone Pair Effect in Multiple Bonds between Heavier Main Group Elements" Chemical Reviews, 1999, 99, 3462. are silicon compounds that contain Si=Si double bonds. The parent silene is (the parent molecule) is disilene, . Structure The first transient disilene was reported in 1972 by D. N. Roark and Garry J. D. Peddle. Simple disilenes easily polymerize. To suppress this tendency, bulky substituents are used. Indeed the first isolable disilene, tetramesityldisilene, was described in 1981 by West, Fink, and Michl. It was prepared by UV-photolysis of the related cyclic trisilane: : 2 i(mesityl)2sub>3 → 3 (mesityl)2Si=Si(mesityl)2 Structure of tetramesityldisilene tetramesityldisilene is a yellow-orange solid. The Si=Si double bond lengths of disilenes vary between 2.14 and 2.29 Å and are nearly 5 to 10% shorter than the Si-Si single bond lengths of corresponding disilanes. A peculiarity of disilenes is the ''trans' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silenes (Si=C)
Organosilicon compounds are organometallic compounds containing carbon–silicon bonds. Organosilicon chemistry is the corresponding science of their preparation and properties. Most organosilicon compounds are similar to the ordinary organic compounds, being colourless, flammable, hydrophobic, and stable to air. Silicon carbide is an '' inorganic'' compound. History In 1846 Von Ebelman's had synthesized Tetraethyl orthosilicate (Si(OC2H5)4). In 1863 Friedel and Crafts managed to make the first organosilieon compound with C-Si bonds which gone byound the syntheses of orthosilicic acid esters. The same year they also described a «polysilicic acid ether» in the preparation of ethyl- and methyl-o-silicic acid. The early extensive research in the field of organosilicon compounds was pioneerd in the beginning of 20th century by Frederic Kipping. He also had coined the term «silicone» (akin to ketones) in relation to these materials in 1904. In recognition of Kipping's ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint George And The Dragon
In a legend, Saint Georgea soldier venerated in Christianitydefeats a dragon. The story goes that the dragon originally extorted tribute from villagers. When they ran out of livestock and trinkets for the dragon, they started giving up a human tribute once a year. This was acceptable to the villagers until a princess was chosen as the next offering. The saint thereupon rescues the princess chosen as the next offering. The narrative was first set in Cappadocia in the earliest sources of the 11th and 12th centuries, but transferred to Libya in the 13th-century '' Golden Legend''.St. George and the Dragon: Introduction in: E. Gordon Whatley, Anne B. Thompson, Robert K. Upchurch (eds.), ''Saints' Lives in Middle Spanish Collections'' (2004). The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semigallia
Semigallia, also spelt Semigalia, ( lv, Zemgale; german: Semgallen; lt, Žiemgala; pl, Semigalia; liv, Zemgāl) is one of the Historical Latvian Lands located in the south of the Daugava river and the north of the Saule region of Samogitia. The territory split between Latvia and Lithuania, previously inhabited by the Semigallian Baltic tribe. They are noted for their long resistance (1219–1290) against the German crusaders and Teutonic Knights during the Northern Crusades. Semigallians had close linguistic and cultural ties with Samogitians. Name The name of Semigallia appears in sources such as ''Seimgala'', ''Zimgola'' and ''Sem'' 'e'''gallen''. The -gal element means "border" or "end", while the first syllable corresponds to ''ziem'' ("north"). So the Semigallians were the "people of the northern borderlands" i.e. the lower parts of the Mūša and Lielupe river valleys. Territory 1st - 4th centuries Between the 1st and the 4th century the cultural area of Semigal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skrudaliena Parish
Skrudaliena Parish ( lv, Skrudalienas pagasts) is an administrative unit of Augšdaugava Municipality in the Selonia region of Latvia. Towns, villages and settlements of Skrudaliena Parish * Skrudaliena Parishes of Latvia Selonia {{Latvia-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silylene
Silylene is a chemical compound with the formula SiH2. It is the silicon analog of methylene, the simplest carbene. Silylene is a stable molecule as a gas but rapidly reacts in a bimolecular manner when condensed. Unlike carbenes, which can exist in the singlet or triplet state, silylene (and all of its derivatives) are singlets. Silylenes are formal derivatives of silylene with its hydrogens replaced by other substituents. Most examples feature amido (NR2) or alkyl/aryl groups. Silylenes have been proposed as reactive intermediates. They are carbene analogs. Synthesis and properties Silylenes are generally synthesized by thermolysis or photolysis of polysilanes, by silicon atom reactions ( insertion, addition or abstraction), by pyrolysis of silanes, or by reduction of 1,1-dihalosilane. It has long been assumed that the conversion of metallic Si to tetravalent silicon compounds proceeds via silylene intermediates: :Si + Cl2 → SiCl2 :SiCl2 + Cl2 → SiCl4 Similar considera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silanes
Silanes refers to diverse kinds of charge-neutral silicon compounds with the formula . The R substituents can any combination of organic or inorganic groups. Most silanes contain Si-C bonds, and are discussed under organosilicon compounds. Examples: *Silane , the parent. * Binary silicon-hydrogen compounds (which are sometimes called silanes also) includes silane itself but also compounds with Si-Si bonds including disilane and longer chains. *Silanes with one, two, three, or four Si-H bonds are called hydrosilanes. Silane itself is the parent member. Examples: triethylsilane () and triethoxysilane (). *Polysilanes are organosilicon compounds with the formula . They include all binary silicon-hydrogen compounds except the parent, although these tend to be less useful because they are fragile. Attracting more interest, are the organic derivatives such as polydimethylsilane and dodecamethylcyclohexasilane * Chlorosilanes have Si-Cl bonds. Examples: trichlorosilane () and tetr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selene (other)
Selene was the personification of the Moon in Greek mythology. Selene may also refer to: Astronomy * Selene, another name for the Moon of Earth *580 Selene, a minor planet orbiting the sun Animals * ''Selene'' (fish), a genus of fishes in the family Carangidae * ''Actias selene'', a species of moth Characters * Selene (''Underworld''), a character in the film ''Underworld'' *Selene (comics), a Marvel Comics supervillain * Selene, an alias used by Lanfear in Robert Jordan's ''Wheel of Time'' series * Adam Selene, a character in Robert Heinlein's ''The Moon Is a Harsh Mistress'' *Selene (Cro character), fictional sabre-toothed tiger in TV series ''Cro'' * Selene Lindstrom, a character in Isaac Asimov's novel ''The Gods Themselves'' Music * ''Selene'', an album by musician Max Tannone * ''Selene'', a song in Imagine Dragons' album Night Visions *''My Selene'', a song by Finnish power metal band Sonata Arctica in the album Reckoning Night People *Selene (given na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seline (other)
Seline may refer to: * Seline, Croatia, a village in Croatia * Seline (singer), South Korean singer, member of Cignature * Seline Hizli, English actress See also * Celine (other) * Selin (other) * Silene (other) * Selene (other) {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silen (other)
Silen may refer to: * Silen, Bulgaria, a village in Bulgaria * Silen language, a language of Indonesia * Johan Silén, Finnish sailor * William Silen, Puerto Rican athlete See also * Silenus, in Greek mythology * Silene (other) * Sillen * Selene (other) * Seline (other) * Cilen {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
