نتایج جستجو برای: pyrazines

تعداد نتایج: 236  

2001
Walter Jetz Candy Rowe Tim Guilford

Warning signals made by unpalatable insects to potential predators commonly target more than one sense: such signals are ‘‘multimodal.’’ Pyrazines are odors produced by warningly colored insects when attacked, and have been shown to interact with food coloration, biasing avian predators against novel and typically aposematic food. However, at present it is not known whether this is an adaptatio...

Journal: :The journal of physical chemistry letters 2012
Sergey P Verevkin Vladimir N Emel'yanenko Rafael Notario María Victoria Roux James S Chickos Joel F Liebman

Thermochemical properties of pyrimidine, pyrazine, and pyridazine have been measured and re-evaluated to provide benchmark quality results. A new internally consistent data set of ΔfHm°(g) has been obtained from combustion calorimetry and vapor pressure measurements. The gas and condensed phase enthalpies of formation of the parent diazines have been re-evaluated, and the results were compared ...

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