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Arachidonic acidArachidonic acid (all-cis-5,8,11,14-eicosatetraenoic acid) is a four-fold unsaturated fatty acid that occurs only in animal fats. It is a starting product for prostaglandin synthesis. The arachidonic acid cascade is one of the main signal transmission pathways in the development of pain and inflammation; it also has a control function in homeostasis.
Introduction A large number of chemical elements were discovered between 1780 and 1850. At the beginning of the 19th century, chemists discovered that certain elements were strikingly similar in terms of their properties and chemical reactions. Investigations have led to attempts to divide the elements into certain classes or to relate them to one another.
Have you completed the learning unit 3.1 - Cimetidine - stomach ulcers and are you looking for further material? Then we recommend the following learning units: 3.2 - Cimetidine - Histamine, histamine receptors 45 min Pharmaceuticals Drugs Topic travel agents This learning unit describes the relationships between histamine and histamine receptors and gastric acid secretion as the basis for developing new ulcer therapeutics such as cimetidine.
Chemical bond: Torsion of the C2-C3 bond in butadiene Due to the different overlap of the orbitals at C2 and C3, it can be assumed that the rotation around the bond axis differs from that of an alkane and an alkene. Therefore, the activation energy and the energy difference of the isomers for butane, 2-butene and butadiene are given in the following table.