stilbene 

  1. 名詞
均二苯代乙烯

    
                        
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例句

                

                    
    
                                                    
  1. 
                                Organic solutions such anthracene or stilbene , dissolved in benzene or toluene, fluoresce with ultraviolet or gamma ray irradiation.                            
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                                The ring system that is fused in this stilbene system has been extensively manipulated to include every imaginable heterocyclic and carbocyclic skeleton of varying ring sizes.                            
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                                The decay times of this fluorescence are of the order of nanoseconds, since the duration of the light depends on the lifetime of the excited states of the fluorescent material, in this case anthracene or stilbene .                            
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                                Resveratrol (3,5,4'-trihydroxy-"trans"- stilbene ) is a stilbenoid, a type of natural phenol, and a phytoalexin produced naturally by several plants in response to injury or when the plant is under attack by pathogens such as bacteria or fungi.                            
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                                "trans"-isomers are more reactive ("trans"- stilbene will add diphenyl(nitrile imide) 27 times faster than "cis"-stilbene) because during the reaction, the 120° bond angle shrinks to 109°, bringing eclipsing "cis"-substituents towards each other for increased steric clash.                            
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