Os óleos essenciais de Toona ciliata, Cedrela odorata e C. fissilis foram analisados por CG-EM. Cedrela apresentou em maior percentagem sesquiterpenos formados a partir do precursor pirofosfato de cis-e trans-farnesila. Já Toona mostra uma tendência em produzir principalmente sesquiterpenos derivados do pirofosfato de trans-farnesila. Estes resultados confirmam que a classificação destes dois gêneros em uma mesma tribo, Cedreleae, continua problemática. As respostas em eletroantenogramas médios (EAGs) dos óleos essenciais de T. ciliata e C. odorata, em fêmeas de Hypsipyla grandella, foram significativamente maiores que aquelas obtidas em machos, sugerindo que as fêmeas utilizariam os odores destes óleos para a seleção da planta hospedeira (gêneros de Swietenioidea) e na escolha de locais para oviposição.The essential oils of Toona ciliata, Cedrela odorata and C. fissilis have been analysed by GC-MS. Cedrela contains the main sesquiterpenes formed from the cis-and trans-farnesyl pyrophosphate. In contrast, Toona tend to produce mainly sesquiterpenes formed from the trans-precursor. These results show that the affiliation of Toona in the tribe Cedreleae together with Cedrela is still rather problematic. Mean electroantennogram responses (EAGs) to the essential oils from T. ciliata and C. odorata, in Hypsipyla grandella females were significantly greater than those obtained for males, suggesting that females would use attractant odours messages from the host-plant (genera of Swietenioideae) as search strategy behaviour for habitat location and oviposition.
The present work is a continuation of a study of the influence of geometric characteristics on the performance of reverse-flow cylindrical-conical cyclones. After studying the behavior of the pressure drop in previous work (Arnosti et al., 1998), here performance in terms of collection efficiency in the removal of particulate material is addressed. The independent variables considered in this study were inlet gas velocity (three velocities) and the following dimensions of the cyclone: the cylindrical section (three heights) and internal height of the gas exit duct (three heights). The tests were performed using an 3³ experimental design. Analysis of the results for overall efficiency was carried out using response surfaces and the statistical parameters were estimated from linear regression
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