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Jalapin
Scammonin (also known as jalapin or scammonium) is a glycoside that has been isolated from the stems of ''Ipomoea purga'' (jalap plant) and from ''Convolvulus scammonia ''Convolvulus scammonia'', known commonly as scammony, is a bindweed native to the countries of the eastern part of the Mediterranean basin; it grows in bushy waste places, from Syria in the south to the Crimea in the north, its range extending ...'' (scammony). References External links Glycosides Glycolipids {{organic-compound-stub de:Skammonium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glycoside
In chemistry, a glycoside is a molecule in which a sugar is bound to another functional group via a glycosidic bond. Glycosides play numerous important roles in living organisms. Many plants store chemicals in the form of inactive glycosides. These can be activated by enzyme hydrolysis, which causes the sugar part to be broken off, making the chemical available for use. Many such plant glycosides are used as medications. Several species of ''Heliconius'' butterfly are capable of incorporating these plant compounds as a form of chemical defense against predators. In animals and humans, poisons are often bound to sugar molecules as part of their elimination from the body. In formal terms, a glycoside is any molecule in which a sugar group is bonded through its anomeric carbon to another group via a glycosidic bond. Glycosides can be linked by an O- (an ''O-glycoside''), N- (a ''glycosylamine''), S-(a ''thioglycoside''), or C- (a '' C-glycoside'') glycosidic bond. According to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ipomoea Purga
''Ipomoea purga'' is a species of flowering plant in the genus ''Ipomoea''. It is commonly referred to as jalap and is probably also the source of the John the Conqueror root. Description ''Ipomoea purga'' is described as a vine that can reach heights of . When fresh, the root is black externally, white and milky within, and varies in size according to its age. It has heart shaped leaves and purple trumpet like flowers. ''Ipomoea purga'' is rather difficult to break down, but if triturated with cream of tartar, sugar of milk, or other hard salts, the process of pulverization is much easier, and the powder rendered much finer. When in powder form in order to ingest, the color is a pale grayish brown. ''Ipomoea purga'' is native to Mexico and it is naturalized in other parts of the neotropics. Discovery ''Ipomoea purga'' was encountered by Spanish conquistadores during the conquest of Mexico. It was introduced to Europe in 1565 as a medical herb used to treat an array of illnesse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convolvulus Scammonia
''Convolvulus scammonia'', known commonly as scammony, is a bindweed native to the countries of the eastern part of the Mediterranean basin; it grows in bushy waste places, from Syria in the south to the Crimea in the north, its range extending westward to the Greek islands, but not to northern Africa or Italy. It is a twining perennial, bearing flowers like those of ''Convolvulus arvensis'', and having irregularly arrow-shaped leaves and a thick fleshy root. The dried juice, virgin scammony, obtained by incision of the living root, has been used in traditional medicine as ''scammonium'', but the variable quality of the drug has led to the employment of ''scammoniae resina'', which is obtained from the dried root by digestion with alcohol. Upon consumption, the resin is inert until it has passed from the stomach into the duodenum, where it meets the bile. A chemical reaction occurs between it and taurocholate and glycocholate in the bile, whereby it is converted into a po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glycosides
In chemistry, a glycoside is a molecule in which a sugar is bound to another functional group via a glycosidic bond. Glycosides play numerous important roles in living organisms. Many plants store chemicals in the form of inactive glycosides. These can be activated by enzyme hydrolysis, which causes the sugar part to be broken off, making the chemical available for use. Many such plant glycosides are used as medications. Several species of ''Heliconius'' butterfly are capable of incorporating these plant compounds as a form of chemical defense against predators. In animals and humans, poisons are often bound to sugar molecules as part of their elimination from the body. In formal terms, a glycoside is any molecule in which a sugar group is bonded through its anomeric carbon to another group via a glycosidic bond. Glycosides can be linked by an O- (an ''O-glycoside''), N- (a ''glycosylamine''), S-(a ''thioglycoside''), or C- (a '' C-glycoside'') glycosidic bond. According to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glycolipids
Glycolipids are lipids with a carbohydrate attached by a glycosidic (covalent) bond. Their role is to maintain the stability of the cell membrane and to facilitate cellular recognition, which is crucial to the immune response and in the connections that allow cells to connect to one another to form tissues. Glycolipids are found on the surface of all eukaryotic cell membranes, where they extend from the phospholipid bilayer into the extracellular environment. Structure The essential feature of a glycolipid is the presence of a monosaccharide or oligosaccharide bound to a lipid moiety. The most common lipids in cellular membranes are glycerolipids and sphingolipids, which have glycerol or a sphingosine backbones, respectively. Fatty acids are connected to this backbone, so that the lipid as a whole has a polar head and a non-polar tail. The lipid bilayer of the cell membrane consists of two layers of lipids, with the inner and outer surfaces of the membrane made up of the pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
