Brazilwood
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. What is new for 2020
Photophysical processes in multicomponent solutions composed by natural pigments, extracted from Caesalpinia echinata (Brazil-wood) leaves, are investigated. Beacuse of the main fluorescent molecules in these solutions are the chlorophyll a, chlorophyll b and pheophytin a, all features are discussed regarding these three pigments. It is observed that the flu
J. Braz. Chem. Soc.. Publicado em: 2020-01
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2. Selective Inner-Filter on the Fluorescence Response of Chlorophyll and Pheophytin Molecules Extracted from Caesalpinia echinata Leaves
Photophysical processes in multicomponent solutions composed by natural pigments, extracted from Caesalpinia echinata (Brazil-wood) leaves, are investigated. Beacuse of the main fluorescent molecules in these solutions are the chlorophyll a, chlorophyll b and pheophytin a, all features are discussed regarding these three pigments. It is observed that the flu
J. Braz. Chem. Soc.. Publicado em: 2020-01
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3. Leishmanicidal compounds of Nectria pseudotrichia, an endophytic fungus isolated from the plant Caesalpinia echinata (Brazilwood)
BACKGROUND In a screen of extracts from plants and fungi to detect antileishmanial activity, we found that the ethyl acetate extract of the fungus Nectria pseudotrichia, isolated from the tree Caesalpinia echinata (Brazilwood), is a promising source of bioactive compounds. OBJECTIVES The aims of this study were to isolate and determine the chemical structu
Mem. Inst. Oswaldo Cruz. Publicado em: 2018-02
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4. Bioactive endophytic fungi isolated from Caesalpinia echinata Lam. (Brazilwood) and identification of beauvericin as a trypanocidal metabolite from Fusarium sp.
Aiming to identify new sources of bioactive secondary metabolites, we isolated 82 endophytic fungi from stems and barks of the native Brazilian tree Caesalpinia echinata Lam. (Fabaceae). We tested their ethyl acetate extracts in several in vitro assays. The organic extracts from three isolates showed antibacterial activity against Staphylococcus aureus and E
Mem. Inst. Oswaldo Cruz. Publicado em: 16/01/2015
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5. Germination, carbohydrate composition and vigor of cryopreserved Caesalpinia echinata seeds
The present study investigated the germination and vigor of Caesalpinia echinata (Brazilwood) seeds stored at negative temperatures. Recently harvested seeds were cryopreserved at -18º or -196ºC and periodically evaluated for germination, seed vigor and carbohydrate composition. The temperatures did not influence the germination percentages or vigor. The g
Braz. arch. biol. technol.. Publicado em: 2012-10
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6. Morphological and physiological adjustments of Brazilwood (Caesalpinia echinata Lam.) to direct solar radiation
This study aimed to characterize the alarm and resistance phases of stress of Caesalpinia echinata under intense irradiance in order to better define its position on forest succession. The alarm phase was identified by rapid reduction in the maximum quantum yield of PSII primary photochemical reactions (ΦP0 = FV/FM) and Performance Index (PIABS) followed by
Braz. J. Plant Physiol.. Publicado em: 2012-09
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7. Light as an indicator of ecological succession in brazilwood (Caesalpinia echinata Lam.)
The ecophysiological behavior of brazilwood (Caesalpinia echinata Lam.) plants was evaluated as affected by light quantity and quality. Nine-month-old plants were cultivated under 0%, 50%, and 80% artificial shading, and natural shading imposed by a closed canopy for a period of 392 days. At the end of that period growth parameters were measured, including r
Brazilian Journal of Plant Physiology. Publicado em: 2009
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8. Pau-brasil/Brasilwood: the different meanings related in which attempts to place its maintenance in the 19th and 20th century / Pau-brasil: os diferentes significados dos discursos de conservação séculos XIX e XX
Neste trabalho foram analisadas fontes de documentação textuais com discursos produzidos desde o início do século XIX até a década de 1970. O objeto de estudo foram os discursos que denotam preocupação de uma árvore na natureza. O estudo teve como objetivo saber qual o sentido (ou os sentidos) dessa preocupação. Por que era importante manter aquel
Publicado em: 2009
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9. The representation of Caesalpinia echinata (Brazilwood) in Sixteenth-and-Seventeenth-Century Maps
O pau-brasil foi o primeiro produto encontrado na Terra de Santa Cruz e o primeiro a ser explorado pela colonização portuguesa no Brasil. Este estudo enfocou a Cartografia Ocidental e os arquivos históricos que representassem o interesse de Portugal em mapear esse produto comercial encontrado no Brasil. A representação do pau-brasil nos mapas foi possí
Anais da Academia Brasileira de Ciências. Publicado em: 2007-12
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10. Wood composition analysis of Caesalpinia echinata Lam. (Brazilwood) : subsidies to understanding its structure and xilophagous organisms / Analise da composição da madeira de Caesalpinia echinata Lam. (pau-brasil) : subsidios para o entendimento de sua estrutura e resistencia a organismos xilofagos
Neste trabalho, a madeira de Caesalpinia echinata Lam. (pau-brasil) oriunda da Reserva Biológica da Estação Experimental de Moji-Guaçu (SP) foi analisada quanto ao teor e composição de extrativos, lignina, polissacarídeos de parede celular e resistência a organismos xilófagos e comparada com as madeiras de Anadenathera macrocarpa (Benth.) Brenae (an
Publicado em: 2007
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11. Análise técnica e econômica de um sistema de colheita florestal / Technical and economic analysis of a forest harvest system
Hand logging systems were the first adopted, mostly, in the exploitation of native forests, with no concern with the rationalization and productivity of such activities. In Brazil, the first activities of forest harvesting were carried out along the coast, at that time of discovery, when the main traded species was brazilwood. Machine selection and developme
Publicado em: 2007
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12. Fenologia e biologia reprodutiva do Pau-brasil (Caesalpinia echinata Lam., Leguminosae-Caesalpinioideae) em remanescente de floresta atlÃntica semidecidual em Pernambuco
O pau-brasil (Caesalpinia echinata Lam.) Ã uma Leguminosae arbÃrea nativa da Floresta AtlÃntica brasileira com grande valor histÃrico e econÃmico para o paÃs. Foi intensamente explorado desde o inÃcio da colonizaÃÃo, encontrando-se atualmente em perigo de extinÃÃo. O objetivo deste trabalho foi investigar a fenologia e a biologia reprodutiva da es
Publicado em: 2006