19 research outputs found
Comparative analysis of the essential oil yield and chemical composition of leaves and fruits of Campomanesia xanthocarpa Berg and C. guaviroba (DC.) Kiaersk. (Myrtaceae).
Poster 209. SBOE 2015
Essential oil yield and composition of Baccharis species from Araucaria Forest of Parana State, Brazil.
Poster 207. SBOE 2015
Abundância de gavião-real e gavião-real falso numa área sob impacto de reservatório no Baixo e Médio rio Xingu
In the Brazilian Amazon, two monospecific genera, the Harpy Eagle and Crested Eagle have low densities and are classified by IUCN as Near Threatened due to habitat loss, deforestation, habitat degradation and hunting. In this study, we evaluate occurrence of these large raptors using the environmental surveys database from Belo Monte Hydroelectric Power Plant. Integrating the dataset from two methods, we plotted a distribution map along the Xingu River, including records over a 276-km stretch of river. Terrestrial surveys (RAPELD method) were more efficient for detecting large raptors than standardized aquatic surveys, although the latter were complementary in areas without modules. About 53% of the records were obtained during activities of wildlife rescue/flushing, vegetation suppression or in transit. Between 2012 and 2014, four Harpy Eagles were removed from the wild; two shooting victims, one injured by collision with power lines and one hit by a vehicle. Also, seven nests were mapped. The mean distance between Harpy Eagle records was 15 km along the river channel, with a mean of 20 km between nests near the channel, which allowed us to estimate 20 possible pairs using the alluvial forest, riverine forest and forest fragments. Territories of another ten pairs will probably be affected by inundation of the Volta Grande channel, which is far from the main river. The average distance between Crested Eagle records was 16 km along the river channel. The only nest found was 1.3 km away from a Harpy Eagle nest. The remnant forests are under threat of being replaced by cattle pastures, so we recommend that permanently protected riparian vegetation borders (APP) be guaranteed, and that forest fragments within 5 km of the river be conserved to maintain eagle populations. © 2015, Instituto Internacional de Ecologia. All rights reserved
Chiral Ligand-Exchange Chromatography on a RP-HPLC Column Coated with a New Chiral Selector Derived from L-Spinacine
A commercial reversed-phase (RP) C18 HPLC column has been dynamically coated with the
chiral selector N<n-decyI-L-spinacine and then loaded with copper(ll) ions. Several racemic
mixtures of underivatized amino acids and oligopeptides were resolved on the column by chiral
ligand-exchange chromatography. The most important experimental conditions affecting
column efficiency, retention, and selectivity (temperature and mobile phase flow rate and
composition) were extensively investigated