J. G. Soares Maia

Óleos essenciais da Amazonia contendo linalol

A continuidade da producao de oleo essencial de pau-rosa na Amazonia, nao esta assegurada, em virtude das dificuldades resultantes da propagacao e do crescimento lento da Aniba duckei Kosterm. Com o proposito de resolver o problema se estabeleceram duas linhas de pesquisas1. a analise (incluindo variacoes periodicas da composicao) do oleo das folhas de pau-rosa (rendimento de 2,0-2,5%) obtido da Aniba duckei Kosterm. (Lauraceae). 2. um estudo das plantas comuns na Amazonia, quanto a seu teor de linalol, que levou a descoberta do oleo das folhas (rendimento 0,8%) obtido de Croton cajucara Benth. (Euphorbiaceae), contendo mais de 66% de linalol.

Distribution of coumarins in Amazonian Brosimum species

Abstract Fourteen Brosimum species (Moraceae) contain either pyranocoumarins or furocoumarins, besides O -prenylbrosiparin which gives rise to brosiprenin by a Claisen type rearrangement.

Óleos essenciais de plantas brasileiras

Como parte de um estudo quimico de plantas brasileiras, comunica-se a presenca de oleos essenciais na madeira de Dicypellium caryophyllatum Nees (Lauraceae), de composicaoeugenol 95,5% O-metileugenol 1,6%; as folhas de Myrcia polyantha D.C., var. coriacea Bg. (Myrtaceae), com um rendimento de 2%, de composicaolimoneno 4,5%, nera 128,0%, geranial 40,2%, sesquiterpenos 14,6%; a casca de Parkia oppositifolia Spr. ex Benth. (Leguminose-mimoeoidaeae), de composicaosalicilato de metila 98,2%; a madeira do tronco de Dalbergia decipuiaris Rizz. et Mattos (Leguminosae-Papilionatae), de composicaonerolidol 97,2%; a madeira do tronco de Poecilanthe parviflora Benth. (Leguminosae-Papilionatae)nerolidol 26,0%; as folhas de Piper cavalcantei Yuncker (Piperaceae), rendimento 1,9% de composicaosafrol 69,0%, metileugenol 8,0%, terpenos 23,0%.

Estudo químico das sementes de bacuri.

The comparative analysis of the seeds of bacuri and bacuripari show,with respects to the fat content, diferences in the quantitative composition of theirs fatty acids (palmitic 44,2:42,3, palmitoleic 13,2:1,0, stearic 2,3:4,6, oleic 37,8:39,9 and linoleic acids 2,5:12,2; %:%, respectively), and the fact that tripalmitin is present in the fatty extracts of bacuri seeds, in appreciable quantities (10%). These fats, especially from bacuri seeds, can be recommended as alternative sources for industry.

Estudo do óleo essencial do puxuri por cromatografia de gás /espectrometria de massa (CG/EM) .

Using gas chromotography-mass spectrometry (GC/MS) with data system, is described the chemical composition of the essential oil of the seeds of puxuri (Licaria puchury-major). Were identified nine monoterpenes besides safrol, eugenol methyleugenol and dodecanoic acid, previously mentioned.

Variedades químicas de Hyptis mutabilis

Two infraespecific chemical forms in Hyptis mutabilis were studied. One of them, variety A, contains α- e β-pinene, α-β-phellandrene, and β-cariyophyllene as the. principal constituents 0f its essential oil. The. other, variety Β, is shown to include, p-cymene, 1,8-cineole, thymol, β-caryophyllene, and β-elemene, as its major. oil components.