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polyene
(redirected from Polyenes)

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
polyene /pol·y·ene/ (pol´e-ēn)
1. a chemical compound with a carbon chain of four or more atoms and several conjugated double bonds.
2. any of a group of antifungal antibiotics with such a structure (e.g., amphotericin and nystatin) produced by species of Streptomyces that damage cell membranes by forming complexes with sterols.

polyene [pol´e-ēn]
1. a chemical compound with a carbon chain of four or more atoms and several conjugated double bonds.
2. any of a group of antibiotic antifungal agents with similar structure, such as amphotericin b, candicidin, or nystatin; they are produced by species of Streptomyces that damage cell membranes by forming complexes with sterols.

polyene
chemical compound characterized by the presence of several conjugated double bonds.

polyene antibiotics
a group of agents, synthesized by Streptomyces spp., with antifungal activity; includes amphotericin B, nystatin and candicidin.


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The authors use the Born-Oppenheimer adiabatic approximation and show the parametric method for calculations for polyenes and acenes.
DRE is the quantity which allows one to account for the effects of electron delocalization and thus serves as a measure of the stabilization of a polyenes molecular entity.
Like the quinones, these polyenes have counterparts in natural photosynthesis molecules.
 
 
 
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