Results 81 to 90 of about 8,662 (198)
Biotransformation of a tetrahydrofuran lignan by the endophytic fungus Phomopsis Sp. [PDF]
The biotrasformation of the tetrahydrofuran lignan, (-)-grandisin, by the endophitic fungus Phomopsis sp, obtained from Viguiera arenaria, led to the formation of a new compound determined as 3,4-dimethyl-2-(4'-hydroxy-3',5'-dimethoxyphenyl)-5-methoxy ...
ARAKAWA, Nilton S. +6 more
core +1 more source
Este trabalho objetivou identificar e caracterizar o sistema de exploração da várzea flúvio-marinha em unidades de produção agroflorestal - UPA, nos aspectos florísticos e socioeconômicos.
Raimundo Nonato da Silveira Ribeiro +2 more
doaj +1 more source
Anelagem como tratamento silvicultural em oito espécies arbóreas na floresta amazônica. [PDF]
bitstream/item/57840/1/CPATU-ComTec95 ...
CARVALHO, J. O. P. de, SANDEL, M. P.
core
Incidence of Extra-Floral Nectaries and their Effect on the Growth and Survival of Lowland Tropical Rain Forest Trees [PDF]
Received the best poster in Organismal Biology award at the NMS Undergraduate Research ForumMutualistic relationships between organisms have long captivated biologists, and extra-floral nectaries (EFNs), or nectar-producing glands, found on many plants ...
Andrew, Muehleisen
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Caracterização florística, fitossociológica e regeneração natural do sub-bosque da reserva genética florestal Tamanduá, D.F. [PDF]
This work was carried out in the Tamanduá Forest Genetic Reserve, in Brasília, Brazil, comprised mainly by gallery forest. It aimed to assess the floristic composition, natural regeneration and the spatial distribution of the main woody species in the ...
José Silva Alves da +4 more
doaj +1 more source
Lignoids in seedlings of Virola sebifera
Quantitative analysis carried out by high performance liquid chromatography indicated the accumulation of a major secondary compound in seedlings of Virola sebifera which was isolated and identified as the lignan hydroxy-otobain. This lignan occurs only in trace amounts in the seeds, where cyclolignans (aryltetralones) are by far the major components ...
Danelutte, Ana Paula +2 more
openaire +3 more sources
Los bosques de robles en el corredor Guantiva-La Rusia-Iguaque corresponden a la formación mayor de Quercus humboldtii y Billia rosea, los cuales se clasificaron en una estructura jerárquica de siete tipos: Bosques de Q.
Andrés Avella Muñoz +1 more
doaj +1 more source
Virola surinamensis: silvicultura e usos. [PDF]
Taxonomia e Nomenclatura; Descrição: Forma biológica, Tronco e galhos, Casca, Folhas, Flores e frutos, Sementes; Biologia Reprodutiva e Fenologia: Sistema reprodutivo, Vetor de polinização, Floração e frutificação, Dispersão de sementes e frutos ...
MARTINS, E. G. +2 more
core +1 more source
Neolignanos en hojas de virola calophylla (Warb)*
De las hojas de Virola Calophylla (Mynsticaceae) se aislaron e identificaron dos neolignanos nuevos, calophyn y calophyllin, y dos neolignanos conocidos, ácido meso-dihidroguaiarético y austrobailignano-6. Las estructuras fueron establecidas por métodos espectroscópicos.
Alvarez V., Enrique +2 more
openaire +2 more sources
Esteroides de virola calophylloidea (markgraf)
Del extracto bencénico de la madera de Virola calophylloldea (Myristicaceae) se separaron seis sustancias tipo esteroidal, valiéndose de las técnicas de Cromatografía de gases (CG) y Cromatografía líquida de alta eficiencia (HPLC). Utilizando los tiempos
Juan C. Martinez V., Luis E. Cuca S
doaj

