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Heneicosane
Heneicosane is the organic compound with the formula CH3(CH2)19CH3. It is the straight chain, saturated C21 hydrocarbon. It is a white wax. Natural occurrence Heneicosane is used as a pheromone by the queen or king termites in the species ''Reticulitermes flavipes''. It also attracts mosquitoes in the genus ''Aedes'' and can be used in mosquito baits. This works in nature as the hydrocarbon is produced in the skin of the larva. A 1:100000 fraction in water is the most attractive, but if the concentration is 1:1000 then mosquitoes are repelled instead. Heneicosane is one of the major components of the safflower flower essential oil (''Carthamus tinctorius''). All parts of the plant '' Periploca laevigata'' contain heneicosane. ''Rosa damascena Rosa or De Rosa may refer to: People *Rosa (given name) * Rosa (surname) *Santa Rosa (female given name from Latin-a latinized variant of Rose) Places *223 Rosa, an asteroid *Rosa, Alabama, a town, United States *Rosa, Germany, in Thurin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Icosane
Icosane (alternative spelling eicosane) is an alkane with the chemical formula C20H42. It has 366,319 constitutional isomers. Icosane has little use in the petrochemical industry, as its high flash point makes it an inefficient fuel. ''n''-Icosane (the straight-chain structural isomer of icosane) is the shortest compound found in paraffin waxes used to form candles. Icosane's size, state or chemical inactivity does not exclude it from the traits its smaller alkane counterparts have. It is a colorless, non-polar molecule, nearly unreactive except when it burns. It is less dense than and insoluble in water. Its non-polar trait means it can only perform weak intermolecular bonding (hydrophobic/van der Waals forces). Icosane's phase transition at a moderate temperature makes it a candidate phase change material, or PCM which can be used to store thermal energy and control temperature. It can be detected in the body odor of persons suffering from Parkinson's disease. Naming IUPAC cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetracosane
Tetracosane, also called ''tetrakosane'', is an alkane hydrocarbon with the structural formula H(CH2)24H. As with other alkanes, its name is derived from Greek for the number of carbon atoms, 24, in the molecule. It has 14,490,245 constitutional isomers, and 252,260,276 stereoisomers. ''n''-Tetracosane is found in mineral called evenkite in the Evenkiysky District, Evenki Region on Lower Tunguska River in Siberia and the Bucnik quarry near Konma in eastern Moravia, in former Czechoslovakia. Evenkite is found as colourless flakes and is reported to fluoresce yellow-orange. See also * List of alkanes References External linksNIST Entry Alkanes {{Hydrocarbon-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organic Compound
In chemistry, organic compounds are generally any chemical compounds that contain carbon-hydrogen or carbon-carbon bonds. Due to carbon's ability to catenate (form chains with other carbon atoms), millions of organic compounds are known. The study of the properties, reactions, and syntheses of organic compounds comprise the discipline known as organic chemistry. For historical reasons, a few classes of carbon-containing compounds (e.g., carbonate salts and cyanide salts), along with a few other exceptions (e.g., carbon dioxide, hydrogen cyanide), are not classified as organic compounds and are considered inorganic. Other than those just named, little consensus exists among chemists on precisely which carbon-containing compounds are excluded, making any rigorous definition of an organic compound elusive. Although organic compounds make up only a small percentage of Earth's crust, they are of central importance because all known life is based on organic compounds. Living t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pheromone
A pheromone () is a secreted or excreted chemical factor that triggers a social response in members of the same species. Pheromones are chemicals capable of acting like hormones outside the body of the secreting individual, to affect the behavior of the receiving individuals. There are ''alarm signal, alarm pheromones'', ''food trail pheromones'', ''sex pheromones'', and many others that affect behavior or physiology. Pheromones are used by many organisms, from basic unicellular prokaryotes to complex multicellular eukaryotes. Their use among insects has been particularly well documented. In addition, some vertebrates, plants and ciliates communicate by using pheromones. The ecological functions and evolution of pheromones are a major topic of research in the field of chemical ecology. Background The portmanteau word "pheromone" was coined by Peter Karlson and Martin Lüscher in 1959, based on the Greek φερω ''pheroo'' ('I carry') and ὁρμων ''hormon'' ('stimulating'). P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reticulitermes Flavipes
''Reticulitermes flavipes'', the eastern subterranean termite, is the most common termite found in North America. These termites are the most economically important wood destroying insects in the United States and are classified as pests. They feed on cellulose material such as the structural wood in buildings, wooden fixtures, paper, books, and cotton. A mature colony can range from 20,000 workers to as high as 5 million workers and the primary queen of the colony lays 5,000 to 10,000 eggs per year to add to this total. Distribution The eastern subterranean termite (''R. flavipes'') is the most widely distributed ''Reticulitermes'' species. It occurs throughout the eastern United States, including Texas, and can be found as far north as southern Ontario. In 2006, ''R. flavipes'' was also recorded in Oregon, on the West coast of the United States. ''Reticulitermes santonensis'' in France is now understood to be a synonym of ''R. flavipes''. The species is now believed to originat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aedes
''Aedes'' is a genus of mosquitoes originally found in tropical and subtropical zones, but now found on all continents except perhaps Antarctica. Some species have been spread by human activity: ''Aedes albopictus'', a particularly invasive species, was spread to the New World, including the United States, in the 1980s, by the used-tire trade. First described and named by German entomologist Johann Wilhelm Meigen in 1818, the generic name comes from the Ancient Greek ἀηδής, ''aēdēs'', meaning "unpleasant" or "odious". The type species for ''Aedes'' is ''Aedes cinereus''.. Systematics and phylogeny The genus was named by Johann Wilhelm Meigen in 1818. The generic name comes from the Ancient Greek ἀηδής, ''aēdēs'', meaning "unpleasant" or "odious". As historically defined, the genus contains over 700 species (see the list of ''Aedes'' species). The genus has been divided into several subgenera (''Aedes'', '' Diceromyia'', '' Finlaya'', ''Stegomyia'', etc.) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carthamus Tinctorius
Safflower (''Carthamus tinctorius'') is a highly branched, herbaceous, thistle-like annual plant in the family Asteraceae. It is commercially cultivated for vegetable oil extracted from the seeds and was used by the early Spanish colonies along the Rio Grande as a substitute for saffron. Plants are tall with globular flower heads having yellow, orange, or red flowers. Each branch will usually have from one to five flower heads containing 15 to 20 seeds per head. Safflower is native to arid environments having seasonal rain. It grows a deep taproot which enables it to thrive in such environments. Biology Plant morphology Safflower is a fast growing, erect, winter/spring-growing annual herb, that resembles a thistle. Originating from a leaf rosette emerges a branched central stem (also referred to as terminal stem), when day length and temperature increase. The main shoot reaches heights of . The plant also develops a strong taproot, growing as deep as . First lateral branch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Journal Of Integrative Medicine
The ''Chinese Journal of Integrative Medicine'' is a quarterly peer-reviewed medical journal covering integrative and alternative medicine. It was established in 1995 as the ''Chinese Journal of Integrated Traditional and Western Medicine'', obtaining its current name in 2003. The journal is published by Springer Science+Business Media, and sponsored by both the Chinese Association of Integrative Medicine and China Academy of Chinese Medical Sciences. The editor-in-chief is Keji Chen (China Academy of Chinese Medical Sciences). According to the ''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 ... of 1.978. References External links *{{Official website, https://www.springer.com/medicine/journal/11655 Alternativ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Periploca Laevigata
''Periploca laevigata'' is a species of flowering plant in the family Apocynaceae, native to the Canary Islands,Manuel Arechavaleta, S. Rodríguez, Nieves Zurita, A. García (Hrsg.): Lista de especies silvestres de Canarias. Hongos, plantas y animales terrestres' (''List of Forest Species of the Canary Islands''). 2009. Gobierno de Canarias, p. 148 the Savage Islands and Cape Verde.Oromí, Martín, Zurita & Cabrera, 2005 : Lista preliminar de especies silvestres de Cabo Verde: Hongos, Plantas y Animales Terrestres.' Gobierno de Canarias, Consejería de Medio Ambiente y Ordenación Territorial, p. 46 The species was described by William Aiton and was published in ''Hortus Kewensis'' in 1789. Its Spanish names are or . "Cornicabra" means goat horn. Subspecies *''Periploca laevigata subsp. chevalieri'' (Browicz) G. Kunkel - found in Cape Verde Description The plant is a shrub and can grow up to 2 metres. Its leaves are lanceolate or. Its stems grow up to 15 cm and is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosa Damascena
Rosa or De Rosa may refer to: People *Rosa (given name) * Rosa (surname) *Santa Rosa (female given name from Latin-a latinized variant of Rose) Places *223 Rosa, an asteroid *Rosa, Alabama, a town, United States *Rosa, Germany, in Thuringia, Germany * Rösa, a village and former municipality in Saxony-Anhalt, Germany *Rosà a town in the province of Vicenza, Veneto, Italy *Monte Rosa, the second highest mountain in the Alps and Western Europe *Republic of South Africa, a southernmost country in Africa. Film and television * ''Rosa'' (1986 film), a Hong Kong film released by Bo Ho Films *'' Rosa – A Horse Drama'', a 1993-94 opera by Louis Andriessen on a libretto by Peter Greenaway * "Rosa" (''Doctor Who''), an episode of the eleventh series of ''Doctor Who'' Music *De Rosa (band), a band from Scotland *"Rosa", a song by Anitta and Prince Royce from the album ''Kisses'', 2019 *"Rosa", a song by Jacques Brel *"Rosa", a song by J Balvin from '' Colores'', 2020 Vehicles *, a U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
