18 documents found, page 1 of 2
Variable-temperature NMR and conformational analysis of oenothein B
Santos,Suzana C.; Carvalho,Ariadne G.; Fortes,Gilmara A. C.; Ferri,Pedro H.; Oliveira,Anselmo E. deOenothein B is a dimeric hydrolysable tannin with a wide range of biological activities, such as antitumour, anti-inflammatory and antiviral. Its nuclear magnetic resonance (NMR) at room temperature show duplications and broadening of signals. Experiments of 1D and 2D NMR at lower temperatures were useful for the complete NMR assignments of all hydrogens and carbons. The 3D structure of the most stable conforme...
Chemotaxonomy of Marsypianthes Mart. ex Benth. based on essential oil variability
Hashimoto,Márcia Y.; Costa,Deomar P.; Faria,Maria T.; Ferreira,Heleno D.; Santos,Suzana C.; Paula,José R.; Seraphin,José C.; Ferri,Pedro H.Essential oils of four species of Marsypianthes (Lamiaceae) were investigated via gas chromatography and multivariate analysis. Each species was represented by two to seven populations, totaling seventeen populations. β-Elemene, (E)-caryophyllene, α-humulene, germacrene D, bicyclogermacrene, δ-cadinene, spathulenol, caryophyllene oxide, and globulol were found in all samples. Principal component and hierarchica...
Spatial chemometric analyses of essential oil variability in Eugenia dysenterica
Vilela,Eliane C.; Duarte,Alessandra R.; Naves,Ronaldo V.; Santos,Suzana C.; Seraphin,José C.; Ferri,Pedro H.Chemovariations in essential oils were used for studying the spatial chemical structure of eight E. dysenterica populations in Central Brazilian Cerrado. Previously, multivariate Mantel autocorrelogram and chemical matrix variation partitioning, using the spatial and environmental data sets as predictors, have suggested a highly significant spatial variation in essential oils. In the present study, spatial chem...
Assessment of Duguetia furfuracea genotoxic and cytotoxic activity in bacteria ...
Silva,Carolina R.; Vieira,Pabline M.; Santos,Suzana C.; Chen-Chen,LeeDuguetia furfuracea (St. Hil.) Benth & Hook f. (1862), popularly known as "sofre-do-rim-quem-quer" and "araticum-seco", is a shrub of the Annonaceae family that occurs in several regions of Brazil. In folk medicine the infusion of its leaves and twigs is used to treat rheumatism and renal colic, whereas the seed powder is mixed with water to treat pediculosis. Previous studies have described biological acti...
Influence of spatial, edaphic and genetic factors on phenols and essential oils...
Duarte,Alessandra R.; Santos,Suzana C.; Seraphin,José C.; Ferri,Pedro H.Essential oil chemical composition and phenolics (total phenols, tannins and anthocyanins), reducing sugar and fruit acidity contents of Myrciaria cauliflora were obtained from cultivated populations in six sampling sites. Canonical redundancy (RDA) and discriminant analyses revealed four clusters of samples based on contents of α-copaene, tannins, reducing sugar and fruit acidity as predictor variables. The to...
Spatial structure of Eugenia dysenterica based on essential oil chemovariations...
Vilela,Eliane C.; Carvalho,Thays C.; Duarte,Alessandra R.; Naves,Ronaldo R.; Santos,Suzana C.; Seraphin,José C.; Ferri,Pedro H.The chemical composition of essential oils was used to study the spatial structure of eight Eugenia dysenterica populations in central Brazilian Cerrado. Variation partitioning using spatial and environmental data sets as predictors was highly significant and explained 7.8 and 8.1% of oil chemovariations, respectively. Results suggested that essential oil polymorphism was genetically rather than environmentally...
Evaluation of chemical changes during Myrciaria cauliflora (jabuticaba fruit) f...
Fortes,Gilmara A. C.; Naves,Sara S.; Ferri,Pedro H.; Santos,Suzana C.Organic acids, sugars, alcohols, phenolic compounds, color properties, pH and titratable acidity were monitored during the commercial fermentation of jabuticaba (Myrciaria cauliflora) by ¹H nuclear magnetic resonance (NMR) spectroscopy, spectrophotometric assays and standard methods of analysis. Data collected was analyzed by principal component (PCA), hierarchical cluster (HCA) and canonical correlation (CCA) ...
Chemotaxonomic markers in essential oils of Hypenia (Mart. ex Benth.) R. Harley
Faria,Maria T.; Costa,Deomar P.; Vilela,Eliane C.; Ribeiro,Dalva G.; Ferreira,Heleno D.; Santos,Suzana C.; Seraphin,José C.; Ferri,Pedro H.Central Brazilian Cerrado is regarded as the center of origin and dispersion of Hypenia (Lamiaceae: subtribe Hyptidineae) in South America. The genus has either remained undivided or been divided into two or seven taxonomic sections, based almost exclusively on a limited range of floral features. Interspecific chemical delimitation to complement analyses of botanical traits is described. Multivariate analysis o...
Influence of foliar nutrients on phenol levels in leaves of Eugenia uniflora
Santos,Rosa M.; Fortes,Gilmara A. C.; Ferri,Pedro H.; Santos,Suzana C.Eugenia uniflora L., Myrtaceae, leaves contain high amounts of phenolic compounds which are responsible for several pharmacological activities. In order to evaluate the phenolics seasonal variation leaves were analysed on a monthly basis during the period of two years for the contents of hydrolysable tannins, total phenols, flavonoids, and nutrients (N, P, K, S, Ca, Mg, Mn, Zn, Cu, and Fe). Results were correla...
Influence of fruit biotypes on the chemical composition and antifungal activity...
Costa,Deomar P.; Alves Filho,Elenilson G.; Silva,Lorena M. A.; Santos,Suzana C.; Passos,Xisto S.; Silva,Maria do Rosário R.; Seraphin,José C.The multivariate chemical analysis of essential oils of Eugenia uniflora leaves with different fruit colours indicated the presence of three oil clusters regarding sample biotypes. The first cluster included yellowish, dark red and purple fruits with high percentages of germacrene B (11.1-30.7%), germacrone (9.8-54%) and atractylone (0-19.9%). In cluster II, with bright red fruit samples, the major constituents...