Óleos essenciais de cascas e folhas de canela (Cinnamomum verum Presl) cultivada no Paraná

Contribution for the phytochemical studies of Ageratum fastigiatum

“…However, qualitative differences among the minor constituents of essential oils can be observed: linalool, lavandulol, α-terpinyl acetate, α-muurolene, α-amorphene and allo-aromadendrene epoxide in essential oil of inflorescences, not detected in the leaves; and, the germacrene A, only observed in the essential oil of the leaves. When the our results are compared with previous studies it can be verified the qualitative and quantitative differences in the chemical composition of different tissues (Koketsu et al, 1997;Botrel et al, 2009;Del-Vechio-Vieira et al, 2009b). In the specific case of essential oil of leaf origin, the yield obtained in our work is low when compared to other studies, that presented yields between 0.40 to 1.20%, also using hydrodistillation as extractive procedure (Del-VechioVieira et al, 2009a;Del-Vechio-Vieira et al, 2009b).…”

Antioxidant activity of essential oils from various spices

“…It is probable that principle antioxidant components of cinnamon are volatile and are present in both the extract and essential oils. According to some publications [16,17], eugenol is the second most abundant component in cinnamon oil after cinnamaldehyd. The antioxidant effect of eugenol has been reported [1,18,19].…”

Fungitoxicity of Essential Oils on Plasmopara Viticola,causal Agent of Grapevine Downy Mildew

“…The aldehydes, when compared to alcohols, provide greater antifungal control, according to Kalemba and Kunicka (2003); for the eucalyptus essential oil, Viturro et al (2003) found that terpenoid alcohol 1.8-cineol is the main constituent, whereas Koketsu et al (1997) reported that in cinnamon bark oil, cinnamic aldehyde (55%) and eugenol (12%) are found. Thus, the higher antifungal activity of cinnamon oil may be due to the high aldehyde content in its composition.…”