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Juniperonic Acid
Juniperonic acid is a polyunsaturated fatty acid featuring a 20-carbon chain with four ''cis''-configured double bonds at positions 5, 11, 14, and 17. These structural traits categorize the compound as an omega-3 fatty acid, and it has drawn significant scientific attention due to its influence on regulating lipid membrane function and cell signaling processes. It is an isomer of eicosatetraenoic acid like the better known omega-6 fatty acid, arachidonic acid. History and natural occurrence The acid was isolated for the first time in 1963 on the leaves and fruits of ''Ginkgo biloba'' by JL Gellerman and H. Schlenk. It was then identified in the oils of other plants, especially conifers: ''Taxodium distichum'' (14.25%), ''Cupressus funebris'' (10.27%), Platycladus orientalis (9%), ''Taxus cuspidata'' (6.8%), etc.; in other flowering plants: ''Ephedra gerardianaii'' (19.2%), ''Caltha sp.'' (9.4%), ''Ephedra nevadensis'' (9.3%), and ''Ephedra przewalskii'' (8.8%), among others; and in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double Bond
In chemistry, a double bond is a covalent bond between two atoms involving four bonding electrons as opposed to two in a single bond. Double bonds occur most commonly between two carbon atoms, for example in alkenes. Many double bonds exist between two different elements: for example, in a carbonyl group between a carbon atom and an oxygen atom. Other common double bonds are found in azo compounds (N=N), imines (C=N), and sulfoxides (S=O). In a skeletal formula, a double bond is drawn as two parallel lines (=) between the two connected atoms; typographically, the equals sign is used for this. Double bonds were introduced in chemical notation by Russian chemist Alexander Butlerov. Double bonds involving carbon are stronger and shorter than single bonds. The bond order is two. Double bonds are also electron-rich, which makes them potentially more reactive in the presence of a strong electron acceptor (as in addition reactions of the halogens). File:Ethene structural.svg, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
