First Report on Yield and Chemical Composition of Essential Oil Extracted from DC (Myrtaceae) from the Brazilian Amazon.

The essential oil (EO) of plants of the Myrtaceae family has diverse chemical composition and several applications. However, data on the oil yield, its composition, and its complete chemistry are still unavailable for some species belonging to this family, such as DC. In this study, the chemical compositions of the EOs of were evaluated by using gas chromatography (GC) alone and gas chromatography coupled with mass spectrometry (GC-MS).

Planting and seasonal and circadian evaluation of a thymol-type oil from Lippia thymoides Mart. & Schauer.

Background: The oil and extracts of Lippia thymoides have been used for various medicinal and food applications. Entrepreneurs in the Amazon have been considering the economic exploitation of this plant. The present study evaluated the influence of the seasonal and circadian rhythm on the yield and composition of the essential oil of leaves and thin branches of a Lippia thymoides specimen cultivated in Abaetetuba, State of Pará, Brazil.