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1.
Acta amaz ; 181988.
Article in Portuguese | LILACS-Express | LILACS, VETINDEX | ID: biblio-1454189

ABSTRACT

Hexane, chloroform and aqueous ethanol extrats of calices and fruits of four especies of Lauraceae ( Licaria armeniaca, L. chrysophylla, Aniba riparia and Aniba sp) were prepared and investigated for their antibiotic activities. The hexane and chloroform extrats of both species of Aniba inhibited the growth of some of the microorganisms tested.


Os extratos hexânicas, clarofórmicos e hidroalcoólicos da cálices e dos frutos de quatro espécies de lauráceaes da Amazônia, Licaria armeniaca, Licaria chrysophylla, Aniba riparia e Aniba sp (No provisório 62), foram avaliados quanto à sua atividade antibiótica. Para os ensaios foram utilizadas bactérias Gram-Positivas, bactérias Gram-negativas e leveduras. Os extratos hexânicos e clorofórmicos das duas espécies de Aniba mostraram atividade contra diversos microorganismos.

2.
Acta amaz ; 181988.
Article in Portuguese | LILACS-Express | LILACS, VETINDEX | ID: biblio-1454216

ABSTRACT

Lignoids, oligomeric arylpropanoids, possess allelochemical activity in plants and pharmacological activity in humans, a fact which has led to important therapeutic applications. The most diversified groups are formed by lignans, derived by the oxidative condensation of cinnamyl alcohols among themselves or with cinnamic acids, and by neolignans, derived by the oxidative condensation of allylphenols, of propenylphenols or of both. The chemistry of lignans has been well known for decades. The chemistry of neolignans was described only recently, chiefly through our own work with Amazonian plants.


Lignóides, arilpropanóides aligoméricos, possuem atividade aleloquímica nas plantas nas quais ocorrem a ação farmacológica no homem, fato que já levou a aplicações terapêuticas importantes. Os grupos mais numerosos são constituídos pelas lignanas, derivadas pela condensação oxidativa de álcoois cinamílicos entre sí ou com ácidos cinâmicos, e pelas neolignanas, derivadas pela condensação oxidativa de alilfenóis e de propenilfenóis entre sí ou cruzada. A química das lignanas é conhecida desde longa data. A química das neolignanas começou a ficar conhecida em época recente, principalmente atráves de nossos trabalhos próprios com plantas da Amazônia.

3.
Acta amaz ; 14(3)1984.
Article in English | LILACS-Express | LILACS, VETINDEX | ID: biblio-1454057

ABSTRACT

Thz wood of Vouacapoua pallidior (Leguminosae-Caesalpinioideae) Contains (+)-methyl vouacapenate.


A madeira de Vouacapoua pallidior (Leguminosae-Caesalpinioideae) contém (+)-vouacapenato de metila.

4.
Acta amaz ; 14(3)1984.
Article in Portuguese | LILACS-Express | LILACS, VETINDEX | ID: biblio-1454058

ABSTRACT

Iryanthera paraensisand I. tricornis (Myristicaceae) both contain in their trunk wood 1-(2' ,4'-dihydroxyphenyl)-3-(2"-methoxy-4", "-methylenedioxyphenyl) -propane (1a),1 -(2',4'-dihydroxyphenyl)-3-(3", 4"-methylenedioxyphenyl)-propane (1b) and 1- (4'-hydroxy -2'-meyhoxyphenyl-3-(4"-hydroxy-3"-methoxyphenyl) -propane (1c). Only from the former species 1- (2' ,4'-dihydroxy-3' -methylphenyl) -3- (2"-methoxy-4",5"-methylenedioxyphenyl) - propane (1d) and 1-(2'-hydroxy-4'-methoxyphenyl)-3-(3",4"-methylenedioxyphenyl)-propane. (1e) were isolated additionally. Data for compound 1b are described for the first time.


Iryanthera paraensis e I. tricornis (Myristicaceae) contêm na madeira de seus troncos 1-(2', 4' - dihidroxifenil) -3- (4", 5"-metilenodoxi-2" -metoxifenil) -propano (1a 1-(2', 4' dihidroxifenil) -3-(3", 4" -metilenodioxifenil)-propano (1b) e 1-(4' -hidroxi -2'-metoxifenil) -3-(4"-hidroxi-3"-metoxifenil) -propano (1c). Apenas da primeira espécie se isolou adicionalmente 1-(2', 4'-dihidroxi-3' -metilfenil)-3-(4", 5"-metilenodioxi-2"- metoxifenil) -propano (1d) e 1-(2'-hidroxi-4'metoxifenil) -3-(3", 4"-metilenodioxifenil) -propano (1e). Dados espectroscópicos para a substância 1b, são descritos pela primeira vez.

5.
Acta amaz ; 12(2)1982.
Article in English | LILACS-Express | LILACS, VETINDEX | ID: biblio-1453872

ABSTRACT

Abstract Aniba species (Lauraceae) are characterized by the presence of neolignans or of 6-aryl (or 6-styryl-) 2-pyrones. Flavonoids occur either together with pyrones or, in rare cases, as predominant micromolecular type. The branch wood of an Aniba species from Marapi, Parú do Oeste River, near Tiriós (Para State), constitutes such a case. It contains 5,7,8,3'.4',5'-hexam-thoxyflavone, obtained for the first time from a natural source.


Espécies de Aniba (Lauraceae) são caracterizadas pela presença de neolignanas ou de 6-aril-(ou 6-estiril-) 2-pironas. Flavonoides ocorrem seja juntos com pironas, seja, em raros casos, como tipo micromolecular predominante. A madeira dos ramos de uma espécie de Aniba coletada em Marapi, no alto rio Paru do Oeste, nas proximidades de Tiriós (Pará), constitui um caso desta índole. Contém 5,7,8.3',4'.5'-hexametoxiflavona, obtida pela primeira vez de fonte natural.

6.
Acta amaz ; 12(3)1982.
Article in English | LILACS-Express | LILACS, VETINDEX | ID: biblio-1453900

ABSTRACT

RESUMO Amostras das madeiras de Aniba panuransis (Meissn.) Mez e de A. permollis (Nees) Mez (família Lauraceae) contém 6-estiril -2-pironas, as quais são respectivamente, o composto não substituído e seu derivado metoxilado na posição 4.

7.
Acta amaz ; 12(3)1982.
Article in Portuguese | LILACS-Express | LILACS, VETINDEX | ID: biblio-1453901

ABSTRACT

Summary The trunk wood of Aniba kappleri Mez (family Lauraceae) contains besides sitosterol, octacosanoic acid and rhamnocitrin (7-O-methylkaempferol), three esters, namely benzyl benzoate, benzyl 2-hydroxybenzoate and benzyl 2,6-dihydroxybenzoate, and two -pyrones, namely 4-methoxy-6- (E) -(3',4'-methy!enedioxystyryl)-2-pyrone and 4-methoxy-6-{E)-(3',4'-dimethoxystyryl]-2pyrone. A dimer of the latter compound, which was obtained additionally, is considered to be an artifact.

8.
Acta amaz ; 12(4)1982.
Article in Portuguese | LILACS-Express | LILACS, VETINDEX | ID: biblio-1453913

ABSTRACT

Summary The trunk wood of Tovomita brasiliensis Walp. from Belém, Pará State, contains 1,5-dihydroxy-6.7-dimethoxyxanthone, betulinic acid and sitosterol. The additional presence of 8-hydroxy-3,5-dimethyl-3.4-dihydroisocoumarin, 8-hydroxy-5-methoxy-3-methyl-3,4-dihydroisocoumarin and 7-chloro-8-hydroxy-6-methoxy-3-methylisocoumarin in the benzene extract is most probably due to infestation of the plant material by fungi.


Resumo A madeira de tronco da Tovomita brasiliensis Walp. (Guttiferae) contém 1,5-dihidroxi-6,7-dimetoxixantona, ácido betulínico e sitosterol. O isolamento concomitante de três policetídeos revelou a provável infestação da amostra analisada por fungos.

9.
Acta amaz ; 12(4)1982.
Article in English | LILACS-Express | LILACS, VETINDEX | ID: biblio-1453914

ABSTRACT

Abstract The ethanolic extract of trunk wood of Tachigalia paniculata Ducke (Leguminosae-Caesalpinioideae) was found to contain substantial quantities of 2-(3-indolyl)-acetic acid.


Resumo Do extrato etanólico da madeira de tronco de Tachigalia paniculata Ducke (Leguminosae-Caesalpinioideae) foram isoladas quantidades substanciais de ácido 2-(3-indolil)-acético.

10.
Acta amaz ; 11(1)1981.
Article in Portuguese | LILACS-Express | LILACS, VETINDEX | ID: biblio-1453722

ABSTRACT

Summary The major constituents of several amazonian species belongging to the families Annonaceae, Bignoniaceae, Burseraceae, Compositae, Euphorbiaceae, Labiatae, Lauraceae, Leguminosae-Papilionoideae, Myrtaceae, Piperaceae and Zingiberaceae are described.


Resumo São descritos, neste trabalho, os principais constituintes dos óleos essenciais de algumas espécies amazônicas pertencentes às famílias Annonaceae, Bignoniaceae, Burseraceae, Compositae, Euphorbiaceae, Labiatae, Lauraceae, Leguminosae-Papilionoideae, Myrtaceae, Piperaceae e Zingiberaceae.

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