5,822 research outputs found
Copper phytoextraction and phytostabilization by Brachiaria decumbens Stapf. in vineyard soils and a copper mining waste.
Brachiaria decumbens is a high biomass plant with great potential for phytoremediation of copper-polluted soils. The current study aimed to evaluate B. decumbens plants for phytoextraction and phytostabilization use in two different copper contaminated vineyard soils and a copper mining waste. Also, the macro and micronutrients uptake were evalu- ated after plants growth in copper contaminated soils. B. decumbens was cultivated in two vineyard soils (Inceptisol and Mollisol) and a copper mining waste for 47 days of growth in greenhouse. Then, B. decumbens?s nutrient uptake was evaluated, and it?s potential application in phytoremediation techniques for the phytoextraction and phytostabilization of copper contamination. B. decumbens exhibited high levels of biomass production at contaminated soils and no negative effect on macronutrients uptake was found. Copper contaminated soils affected micronutrients uptake by Brachiaria plants. This Brachiaria specie showed high potential on copper phytoextraction with accumulation of copper concentra- tions in the shoots and roots of 70 and 585 mg·kg?1 of dry mass, respectively, in the vineyard Inceptisol soil, after 47 days of growth. Mollisol soil and copper mining waste also exhibited high copper concentration in the biomass in the entire plant with 371 and 466 mg·kg?1, respectively. Although Brachiaria exhibited low levels of translocation factor for copper, this specie showed high potential for copper phytoextraction on Inceptisol, Mollisol and copper mining waste with 1900, 1156 and 1363 g·ha?1 of copper, respectively. In summary, B. decumbens plants showed high potential for copper phytoextraction and phytostabilization of copper on contaminated vineyard soils and copper mining waste
Produção em larga escala de Baculovirus spodoptera em lagartas de Spodoptera frugiperda de diferentes idades e em dois periodos de inoculação.
Cannibalism and virus production in Spodoptera frugiperda (J. E. smith) (Lepidoptera: noctuidae) larvae fed with two leaf substrates inoculated with baculovirus spodoptera.
Cannibalism in the fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) (FAW), is a limiting factor in a baculovirus production system. To detect the impact of cannibalism, a two-step bioassay was conducted with different larval ages of FAW fed on two food sources (corn and castor bean leaves) contaminated with the S. frugiperda multiple-embedded nucleopolyhedrovirus. In a first bioassay, the food source affected the cannibalism, being higher for all larval ages tested (5-, 6- and 7-day-old larvae) in larvae fed on corn than on those fed on castor bean leaves. Larval mortality, weight equivalent and larval equivalents (LEs) per hectare decreased as the larval age increased. Larval weight, occlusion bodies (OBs)/larva and total OBs increased when the larval age increased. In a second bioassay, in which only 6-and 7-day-old larvae were used because of the performance in the first bioassay, the cannibalism rates were affected by the interaction between food sources and time of feeding (48 and 72 h), reaching the highest values for 6- and 7-day-old larvae fed on corn leaves for 72 h. Mortality of the FAW was affected by the interaction between food sources, larval age and time of feeding. The lowest mortalities were on 7-day-old larvae when they were fed on castor bean leaves for 48 and 72 h. Larval weight, OBs/larva, total OBs and LEs were affected by theinteraction between food sources and larval age. A significant correlation was observed between larval weight and OBs/larva that fed on both food sources, suggesting that larval weight can be used to achieve a concentration to be sprayed in 1 ha
Desenvolvimento de uma técnica de criação de Aganaspis pelleranoi em larvas de Anastrepha fraterculus.
Efeito do alimento na biologia de adultos de Doryctobracon areolatus (Hymenoptera: Braconidae).
Nurses and the Manchester: rearranging the work process and emergency care?
Objective: to understand the changing roles of nurses in labor division organization in hospitals from the Manchester Triage System implementation in an emergency hospital. Methods: this is an ethnographic study that used different production techniques and data analysis. Results: the Manchester Triage System organized flows and places resulting in quality of care and changes in work processes. Conflict relationships related to disagreements in risk stratification were present. Final considerations: the traditional roles of nurses have been transformed, but it cannot be said that there was a structural change in their position in labor division organization in hospitals. The frontiers of autonomy, therefore of increasing the professionalization of nurses, are neither fixed nor stable, expanding or contracting according to the micropolitical changes in the governance of care.info:eu-repo/semantics/publishedVersio
Lay agency and the generation of Public-Private mix health care maps
O artigo problematiza parte dos resultados de estudo realizado em dois municípios do ABCD paulista no período de 2010 a 2012 com o objetivo de evidenciar a existência de lógicas regulatórias não estatais na viabilização do acesso e consumo de serviços de saúde. Na primeira etapa, foram realizadas entrevistas com atores estratégicos (gestores e políticos) e atores-trabalhadores-chave. Na segunda, foram coletadas histórias de vida de 18 pessoas com elevada frequência de utilização de serviços de saúde. O estudo revelou o papel protagonista dos usuários na construção de “mapas do cuidado”, com destaque para a utilização frequente de recursos públicos e privados nos seus percursos, contornando ou se mesclando com a regulação governamental, para a obtenção do cuidado de que necessitam. Os diferentes formatos do mix público-privado observados transcendem as concepções “oficiais” ainda vigentes sobre a distinção nítida entre os dois sistemas, revelando a importância desse tema para a gestão pública da saúde.info:eu-repo/semantics/publishedVersio
Efeito de nim sobre Ceratitis capitata (Wied.) (Diptera: tephritidae) via isca tóxica em laboratório.
O presente trabalho tem por objetivo avaliar os efeitos de diferentes concentrações de formulação a base de nim sobre adultos de C. capitata
From Dusty Filaments to Cores to Stars: An Infrared Extinction Study of Lupus 3
We present deep NIR observations of a dense region of Lupus 3 obtained with
ESO's NTT and VLT. Using the NICE method we construct a dust extinction map of
the cloud, which reveals embedded globules, a dense filament, and a dense ring
structure. We derive dust column densities and masses for the entire cloud and
for the individual structures therein. We construct radial extinction profiles
for the embedded globules and find a range of profile shapes from relatively
shallow profiles for cores with low peak extinctions, to relatively steep
profiles for cores with high extinction. Overall the profiles are similar to
those of pressure truncated isothermal spheres of varying center-to-edge
density contrast. We apply Bonnor-Ebert analysis to compare the density
profiles of the embedded cores in a quantitative manner and derive physical
parameters such as temperatures, central densities, and external pressures. We
examine the stability of the cores and find that two cores are likely stable
and two are likely unstable. One of these latter cores is known to harbor an
active protostar. Finally, we discuss the relation between an emerging cluster
in Lupus 3 and the ring structure identified in our extinction map. Assuming
that the ring is the remnant of the core within which the cluster originally
formed we estimate that a star formation efficiency of ~ 30% characterized the
formation of the small cluster. Our observations of Lupus 3 suggest an intimate
link between the structure of a dense core and its state of star forming
activity. The dense cores are found to span the entire range of evolution from
a stable, starless core of modest central concentration, to an unstable,
star-forming core which is highly centrally concentrated, to a significantly
disrupted core from which a cluster of young stars is emerging.Comment: Accepted for publication in the Astrophysical Journal. Go to
http://cfa-www.harvard.edu/~clada/ or http://cfa-www.harvard.edu/~pteixeir/ a
version with higher resolution figure
TESLA Technical Design Report Part III: Physics at an e+e- Linear Collider
The TESLA Technical Design Report Part III: Physics at an e+e- Linear
ColliderComment: 192 pages, 131 figures. Some figures have reduced quality. Full
quality figures can be obtained from http://tesla.desy.de/tdr. Editors -
R.-D. Heuer, D.J. Miller, F. Richard, P.M. Zerwa
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