989 resultados para Maine de Biran, Pierre, 1766-1824.
Resumo:
Resumen basado en el del autor. Resumen en inglés
Resumo:
Se elabora una conferencia, con motivo de la celebraci??n del d??a del libro, dedicada a la vida y obra del cient??fico e investigador del S. XIX Agust??n de Bethencourt y Molina. Dado que el CEO lleva su nombre y se cumple el 250 aniversario de su nacimiento, se realizan distintas actividades conmemorativas en el centro escolar, de las que forma parte esta conferencia y que finalizan con un hermanamiento oficial entre San Petersburgo, donde vivi?? y muri??, y la ciudad del Puerto de la Cruz, su lugar de nacimiento. Se contribuye con este trabajo al conocimiento de este cient??fico canario por parte de toda la comunidad educativa.
Resumo:
A simple "Y" shaped olfactometer was used in laboratory studies on the olfactory attractiveness of mixtures in various proportions of industrial analogues of some host plant and conspecific-based semiochemicals, or their combinations with banana rhizome, to the banana weevil. The aim was to identify factors that influence their attractiveness to the weevil, and consider the possibility for their use as lures for trapping the weevil in the field. Cosmopolites sordidus was attracted to the mixtures at specific concentrations and proportions of constituent chemicals. 6-methylhept-5-en-2-one was only attractive on its own at 1 µl/100 ml and in mixture with 4- mercaptophenol, but not at 10 µl, 0.01 µl, or in combination with banana rhizome. 4-mercaptohpenol and 2-n-butylfuran, which were compatible with most host plant-based chemicals and were attractive as a mixture, were perceived to be key elements in the composition of attractants to the weevil. It was concluded that in addition to the composition, other factors that may determine the attractiveness or otherwise of a mixture to C. sordidus are the proportions and concentrations of the constituent chemicals.
