Woods Extracts
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Aplicação de análise multivariada aos dados de análise cromatográfica e espectroscopia para a diferenciação de extratos de madeira / Multivariate analysis applied to chromatography and spectroscopy data to differentiation woods extracts
A presença de 14 compostos fenólicos (ácido elágico, ácido gálico, vanilina, siringaldeído, sinapaldeído, coniferaldeído, ácido vanílico , siríngico ácido, a quercetina, trans-resveratrol, catequina, epicatequina, eugenol, e miricetina) e duas cumarinas (escopoletina e cumarina) foi investigada por HPLC-ESI-MSn em um total de 25 extratos de agua
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/04/2012
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2. Identificação de extratos etanólicos de madeiras utilizando seu espectro eletrônico de absorção e análise multivariada
The application of multivariate analysis to spectrophotometric (UV) data was explored for distinguishing extracts of cachaça woods commonly used in the manufacture of casks for aging cachaças (oak, cabreúva-parda, jatobá, amendoim and canela-sassafrás). Absorbances close to 280 nm were more strongly correlated with oak and jatobá woods, whereas absorba
Química Nova. Publicado em: 2012
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3. Desenvolvimento e aplicação de um novo ensaio para a determinação eletroquímica da capacidade antioxidante de compostos modelo e de matrizes complexas / Development and application of a new assay for the electrochemical determination of the antioxidant capacity of model compounds and of complex matrices
This work describes the development and practical applications of a novel and simple electrochemical methodology for the determination of the antioxidant capacity of specific model molecules and/or some complex food samples currently consumed in Brazil. Other systems having either theoretical or technological interest were also investigated. The method is ba
Publicado em: 2009
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4. Identificação de Madeiras de clones de Eucalyptus grandis, Eucalyptus urophylla e do híbrido Eucalyptus urograndis por RMN 13C. / Wood Identification of clones of Eucalyptus grandis, Eucalyptus urophylla and of the hybrid Eucalyptus urograndis by 13C NMR .
The Eucalyptus genus is represented for trees that have high growth rate, plasticity, straight way of stem growth, natural pruning and wood with the technological properties suitable for a diverse use. In function of ecological society pressure and the larger distance between the forest and the consumer center, the native woods have been substituted by eucal
Publicado em: 2008
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5. "Compostos fenólicos em madeiras brasileiras" / "Phenolics compounds in brazilian woods"
Maturation in oak barrels is an important widely spread pratice in the production of a high quality spirit. However, despite the biodiversity in Brazil, the cachaça aging in wodden barrels is not a commun pratice. The use mostly imported oak barrels for the cachaça maturation process. This producers barrel had been usual maturation previously for wine, cog
Publicado em: 2006
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6. Reductive Pentose Phosphate Cycle in Nitrosocystis oceanus1
Campbell, Ann E. (Woods Hole Oceanographic Institution, Woods Hole, Mass.), Johan A. Hellebust, and Stanley W. Watson. Reductive pentose phosphate cycle in Nitrosocystis oceanus. J. Bacteriol. 91:1178–1185. 1966.—Assays in cell-free extracts of Nitrosocystis oceanus, a marine chemoautotrophic bacterium, have demonstrated the presence of all of the enzyme
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7. Single-Cell Protein Production in Alkaline Mesquite Wood Extracts
A nine-member, mixed, cellulolytic, bacterial culture was used to evaluate the effects of sodium hydroxide normality, length and temperature of treatment, and the ratio of volume of alkali to mesquite wood on the suitability of alkali mesquite wood extractives as nutrients for bacterial growth. The presence or absence of air during the extraction process did
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8. Nystatin-Resistant Mutants of Yeast: Alterations in Sterol Content
Mutants of the genes nys1 and nys3 differ from sensitive strains (nys+) in their sterol content. Ultraviolet absorption spectra of the nonsaponifiable material extracted from cells of nys+ demonstrated the presence of ergosterol and 24(28)-dehydroergosterol. In nys1 mutants, the spectrum suggests the presence of a new sterol. The absorption spectrum of extra