Results 121 to 130 of about 213 (147)
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Ageing of brazilwood dye in wool – a chromatographic and spectrometric study
Journal of Cultural Heritage, 2013Abstract Brazilwood was used in this work to dye wool mordanted with different amounts of copper(II) sulfate, alum and iron(II) sulfate. Two different dyeing methods were used: premordanting (MD) and simultaneous mordanting (M+D) procedures. In order to evaluate the influence of the mordant ion in the brazilein chromophore photodegradation, samples ...
Ana Manhita +2 more
exaly +3 more sources
A Spectroscopic Study of Brazilwood Paints in Medieval Books of Hours
Applied Spectroscopy, 2014In this work, microspectrofluorimetry was for the first time applied to the identification of the red organic lakes that are characteristic of the lavish illuminations found in 15th century books of hours. Microspectrofluorimetry identified those red paints, ranging from opaque pink to dark red glazes, as brazilwood lakes.
Maria João Melo +2 more
exaly +5 more sources
Light as an indicator of ecological succession in brazilwood (Caesalpinia echinata Lam.) [PDF]
Brazilian Journal of Plant Physiology, 2009 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.
Eliemar Campostrini +2 more
exaly +3 more sources
Protoplasma, 2022
Paubrasilia echinata (brazilwood) is an endangered native tree from the Brazilian Atlantic Forest whose seeds tolerate maturation drying, but, unlike classic orthodox seeds, they quickly lose viability after shedding. This work analyzed the biochemical and ultrastructural changes during the maturation of brazilwood seeds, with particular attention to ...
Claudio JOSÉ Barbedo +2 more
exaly +3 more sources
Paubrasilia echinata (brazilwood) is an endangered native tree from the Brazilian Atlantic Forest whose seeds tolerate maturation drying, but, unlike classic orthodox seeds, they quickly lose viability after shedding. This work analyzed the biochemical and ultrastructural changes during the maturation of brazilwood seeds, with particular attention to ...
Claudio JOSÉ Barbedo +2 more
exaly +3 more sources
Occurrence of Platypus mutatus Chapuis (Coleoptera: Platypodidae) in a brazilwood experimental plantation in Southeastern Brazil [PDF]
Neotropical Entomology, 2006 The hardwood of Caesalpinia echinata Lam. (brazilwood, Pernambuco, ibirapitanga) is currently the most profitable material used for violin bow due to the unique vibrational properties and dimensional stability. Although this species is resistant to the wood decay caused by termites and rot fungi, an experimental plantation in Southeastern Brazil has ...
Marcia R Braga
exaly +6 more sources
International Biodeterioration and Biodegradation, 2007
The heartwood of Caesalpinia echinata Lam. (Leguminosae) (commonly called brazilwood) is used for violin bow manufacture due to the unique vibrational and physical properties found in the wood. In the present work, the effects of Pycnoporus sanguineus (white-rot fungus), Gloeophyllum trabeum (brown-rot fungus), Chaetomium globosum (soft-rot fungus ...
Sérgio Brazolin +2 more
exaly +3 more sources
The heartwood of Caesalpinia echinata Lam. (Leguminosae) (commonly called brazilwood) is used for violin bow manufacture due to the unique vibrational and physical properties found in the wood. In the present work, the effects of Pycnoporus sanguineus (white-rot fungus), Gloeophyllum trabeum (brown-rot fungus), Chaetomium globosum (soft-rot fungus ...
Sérgio Brazolin +2 more
exaly +3 more sources
Brazilwood Reds: The (Photo)Chemistry of Brazilin and Brazilein
The Journal of Physical Chemistry A, 2013The ground and excited state (in the singlet state, S1) acid–base equilibria, together with the photophysical properties of the two main constituents of brazilwood, brazilin and brazilein, have been investigated in aqueous solutions in the pH range: −1 < pH < 10.
Raquel, Rondão +5 more
openaire +2 more sources
Vibrational Spectroscopy, 2002
Abstract In this work, the vibrational spectra (FT-Raman and infrared spectra) of brazilin, the major component of brazilwood Caesalpinia echinata (from Bahia, Brazil), and brazilein, the oxidised pigment, are investigated. The FT-Raman spectra of the compounds show different patterns in the carbonyl stretching region, where brazilein presents a ...
Luiz Fernando C De Oliveira +2 more
exaly +2 more sources
Abstract In this work, the vibrational spectra (FT-Raman and infrared spectra) of brazilin, the major component of brazilwood Caesalpinia echinata (from Bahia, Brazil), and brazilein, the oxidised pigment, are investigated. The FT-Raman spectra of the compounds show different patterns in the carbonyl stretching region, where brazilein presents a ...
Luiz Fernando C De Oliveira +2 more
exaly +2 more sources
Fourier-transform Raman characterization of brazilwood trees and substitutes
The Analyst, 2002In this work we have applied Fourier-transform Raman spectroscopy to the analysis of several archival samples of brazilwoods from different geographical origins and of different ages. Samples of Caesalpinia echinata Lam. (from Brazil, South America), Caesalpinia sappan L.
Howell G M, Edwards +2 more
openaire +2 more sources
Studies in Conservation, 2016
A multi-analytical approach for the study of brazilwood and its lake pigments was carried out based on historically accurate reconstructions. Recipes for brazilwood lakes from the fifteenth century technical text Livro de como se fazem as cores and the Winsor & Newton nineteenth century colourman's archive were reproduced and compared.
Tatiana Vitorino +2 more
exaly +2 more sources
A multi-analytical approach for the study of brazilwood and its lake pigments was carried out based on historically accurate reconstructions. Recipes for brazilwood lakes from the fifteenth century technical text Livro de como se fazem as cores and the Winsor & Newton nineteenth century colourman's archive were reproduced and compared.
Tatiana Vitorino +2 more
exaly +2 more sources