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Essential oils of the Amazon Guatteria and Guatteriopsis species
The essential oils of Guatteria juruensis, G. microcalyx, G. poeppigiana and Guatteriopsis blepharophylla were obtained by hydrodistillation and analysed by GC and GC[sol ]MS. The main compoundsExpand
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Leaf volatile oils from four Brazilian Xylopia species
The leaf oils of Xylopia aromatica, X. cayennensis, X. emarginata and X. nitida were obtained by hydrodistillation and analysed by GC-MS. The main compounds found in the oil of X. aromatica wereExpand
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Variability in essential oil composition of Piper dilatatum L.C. Rich
Twelve samples of air-dried aerial parts of Piper dilatatum L. C. Rich yielded essential oils and their volatile constituents were analyzed by GC and GC–MS. Sesquiterpenes, both hydrocarbons andExpand
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Antioxidant Capacity and Larvicidal and Antifungal Activities of Essential Oils and Extracts from Piper krukoffii
The leaves and twigs of Piper krukoffii, collected in the Carajás National Forest, north Brazil, yielded essential oils (2.0% and 0.8%), the main constituents of which were myristicin (40.3% andExpand
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[Nesting biology of Centris flavifrons (Friese) (Hymenoptera: Apidae, Centridini), one of the main pollinators of Byrsonima crassifolia L. Kunth in Maranhão, Brazil].
The Centridini has almost 176 species distributed mainly in the tropic regions of America. Although they are considered key pollinators in the maintenance of many vegetal species, data about theirExpand
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Essential Oil Composition of Peperomia serpens (Sw.) Loud
Abstract The fresh- and dried-leaf oils and the fresh-leaf concentrate of Peperomia serpens were obtained by hydrodistilla-tion and SPME, and analyzed by GC and GC/MS. The main compounds identifed inExpand
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Modern pollen rain as a background for palaeoenvironmental studies in the Serra dos Carajás, southeastern Amazonia
Several alternative interpretations of the pollen records of lake sediments in the Amazonia may arise due to a lack of understanding of the modern environments, mainly related to pollen–vegetationExpand
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Essential Oil Composition from Duguetia Species (Annonaceae)
Abstract The leaf and fine stems and the bark oils of Duguetia eximia, D. flagellaris, D. pycnastera, D. riparia and D. trunciflora were obtained by hydrodistillation and analyzed by GC and GC/MS.Expand
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Essential Oil Variation in Lippia glandulosa Schauer
Abstract The oils of 14 samples of Lippia glandulosa collected in the “Lavrado” area, Roraima state, North Brazil, were obtained by hydrodistillation and analyzed by GC and GC/MS. Two chemical groupsExpand
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