RESUMO
The volatile compound from oak leaves which stimulates the female polyphemus moth to release her sex pheromone has been isolated and identified as trans-2-hexenal. Although leaves of other food plants contain trans-2-hexenal, they also release masking odors which block the activity of the hexenal.
Assuntos
Aldeídos/análise , Aldeídos/fisiologia , Insetos/fisiologia , Feromônios/fisiologia , Árvores/análise , Alcenos , Animais , Comportamento Animal , Cromatografia , Raios Infravermelhos , Espectroscopia de Ressonância Magnética , Comportamento Sexual , Solubilidade , Análise EspectralRESUMO
It is suggested that an alternative, or additional, source of the blue haze above heavily forested areas may be the generation of submicrometer-sized wax particles by the action of strong electrical fields at the tips of pine needles and other wax-covered plant surfaces. Exposure of pine needles to high potential gradients results in the production of airborne wax particles with diameters less than 0.6 micrometer.
Assuntos
Ar/análise , Árvores/análise , Ceras/análise , Ácidos/análise , Poluição do Ar/análise , Álcoois/análise , Alcanos/análise , Condutividade Elétrica , Eletrofisiologia , Microscopia Eletrônica , Extratos Vegetais/análise , Árvores/fisiologiaRESUMO
A series of novel, representatively substituted amides of thujic acid were prepared and screened for insect repellent and attractant potential. In repel-lency tests the N,N-diethylamide was the most potent compound, surpassing the activity of the standard repellents dimethyl phthalate and fencholic acid. In contrast, the N-monoethylamide displayed attractant activity.