21,350 research outputs found
Use of flight interception traps of Malaise type and attractive traps for social wasps record (Vespidae: Polistinae)
The literature provides different methodologies for sampling social
wasps, including, flight intercept trap type Malaise and Attractive
trap, however, there is no consensus on its use. In this respect, the
aim of this study was to evaluate the best use of Malaise traps and
Attractive trap in biodiversity work of social wasps, and generate a
collection protocol for the use of these traps. The study was conducted
in the Parque Estadual do Rio Doce, located in the east of the state
of Minas Gerais, in the years 2000, 2001, 2002 and 2004 and in the
Botanical Garden of the Federal University of Juiz de Fora, located in
the southeastern state of Minas Gerais, in years 2011, 2012 and 2013.
15 species were collected using Malaise traps, and, 26 species of social
wasps were collected using Attractive traps. Although the negative
aspects of both traps, complementary methodologies surveys varying
social wasps are useful and it is recommended to choose for using in
accordance with the logistical field
Accuracy of a teleported trapped field state inside a single bimodal cavity
We propose a simplified scheme to teleport a superposition of coherent states
from one mode to another of the same bimodal lossy cavity. Based on current
experimental capabilities, we present a calculation of the fidelity that can be
achieved, demonstrating accurate teleportation if the mean photon number of
each mode is at most 1.5. Our scheme applies as well for teleportation of
coherent states from one mode of a cavity to another mode of a second cavity,
both cavities embedded in a common reservoir.Comment: 4 pages, 2 figures, in appreciation for publication in Physical
Review
The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean
The stable isotope composition of dissolved silicon in seawater (δ30SiDSi) was examined at 10 stations along the GEOVIDE section (GEOTRACES GA-01), spanning the North Atlantic Ocean (40–60∘ N) and Labrador Sea. Variations in δ30SiDSi below 500 m were closely tied to the distribution of water masses. Higher δ30SiDSi values are associated with intermediate and deep water masses of northern Atlantic or Arctic Ocean origin, whilst lower δ30SiDSi values are associated with DSi-rich waters sourced ultimately from the Southern Ocean. Correspondingly, the lowest δ30SiDSi values were observed in the deep and abyssal eastern North Atlantic, where dense southern-sourced waters dominate. The extent to which the spreading of water masses influences the δ30SiDSi distribution is marked clearly by Labrador Sea Water (LSW), whose high δ30SiDSi signature is visible not only within its region of formation within the Labrador and Irminger seas, but also throughout the mid-depth western and eastern North Atlantic Ocean. Both δ30SiDSi and hydrographic parameters document the circulation of LSW into the eastern North Atlantic, where it overlies southern-sourced Lower Deep Water. The GEOVIDE δ30SiDSi distribution thus provides a clear view of the direct interaction between subpolar/polar water masses of northern and southern origin, and allow examination of the extent to which these far-field signals influence the local δ30SiDSi distribution
Metodologia científica: aperfeiçoamento metodológico para digestão assistida via micro-ondas na análise mineral de feijoeiro comum (Phaseolus vulgaris L.).
O objetivo deste trabalho foi determinar a eficiência na recuperação de minerais por meio do método de digestão em micro-ondas adaptado e analisar se essa recuperação é confiável com o uso de menor volume de ácido nítrico, otimizando-se, desta forma, o método. Neste comunicado, são relatadas todas as etapas e procedimentos para a condução das análises, assim como, discutidos os resultados e o alcance dos principais objetivos do trabalho com base em análise estatística e cálculo do Z Score.bitstream/item/30834/1/comt196.pd
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