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Search Results: 1 - 10 of 342862 matches for " NEWTON J. J. SILVA "
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A rare but successful reproductive tactic in a social wasp (Hymenoptera:Vespidae): Use of heterospecific nests Una táctica reproductiva rara pero exitosa en una avispa social (Hymenoptera: Vespidae): Uso de nidos de otras especies
ANDRé R. DE SOUZA,NEWTON J. J. SILVA,FáBIO PREZOTO
Revista chilena de historia natural , 2012,
Abstract: Successful heterospecific use of abandoned nests has been reported in birds. Although the same behavior has been observed in wasps, the success of such tactic has not been demonstrated. We described two cases in which the social wasp Polistes versicolor successfully reared its brood in empty nests of the social wasps Mischocyttarus drewseni and Mischocyttarus cassununga (Hymenoptera: Vespidae). We showed that this is a rare but a viable reproductive tactic for both solitary and associative foundress. Unlike birds, which use heterspecific nests very similar to their own, wasps are able to use heterspecific nests that do differ from their own. El uso adecuado de los nidos abandonados ha sido reportado en aves. Aunque el mismo comportamiento se ha observado en avispas, pero el éxito de tal táctica no ha sido demostrada. Se describen dos casos en los que la avispa social Polistes versicolor utiliza con éxito los nidos vacíos de la avispa social Mischocyttarus drewseni y Mischocyttarus cassununga (Hymenoptera: Vespidae). Hemos demostrado que esta es una rara, pero una viable táctica reproductiva. A diferencia de las aves, que utilizan nidos muy similares a las suyas, las avispas son capaces de utilizar los nidos que difieran de los suyos.
Bacteriophages with Potential for Inactivation of Fish Pathogenic Bacteria: Survival, Host Specificity and Effect on Bacterial Community Structure
Carla Pereira,Yolanda J. Silva,Ana L. Santos,?ngela Cunha,Newton C. M. Gomes,Adelaide Almeida
Marine Drugs , 2011, DOI: 10.3390/md9112236
Abstract: Phage therapy may represent a viable alternative to antibiotics to inactivate fish pathogenic bacteria. Its use, however, requires the awareness of novel kinetics phenomena not applied to conventional drug treatments. The main objective of this work was to isolate bacteriophages with potential to inactivate fish pathogenic bacteria, without major effects on the structure of natural bacterial communities of aquaculture waters. The survival was determined in marine water, through quantification by the soft agar overlay technique. The host specificity was evaluated by cross infection. The ecological impact of phage addition on the structure of the bacterial community was evaluated by DGGE of PCR amplified 16S rRNA gene fragments. The survival period varied between 12 and 91 days, with a higher viability for Aeromonas salmonicida phages. The phages of Vibrio parahaemolyticus and of A. salmonicida infected bacteria of different families with a high efficacy of plating. The specific phages of pathogenic bacteria had no detectable impact on the structure of the bacterial community. In conclusion, V. parahaemolyticus and A. salmonicida phages show good survival time in marine water, have only a moderated impact on the overall bacterial community structure and the desired specificity for host pathogenic bacteria, being potential candidates for therapy of fish infectious diseases in marine aquaculture systems.
Centro de Análise Sirgas - IBGE: novas estratégias de processamento e combina??o, e a influência da mudan?a do referencial global nos resultados
Costa, Sonia Maria Alves;Silva, Alberto Luis Da;Lima, Marco Aurélio De Almeida;Moura Júnior, Newton José De;
Boletim de Ciências Geodésicas , 2012, DOI: 10.1590/S1982-21702012000100004
Abstract: currently, the sirgas (geocentric reference system for the americas) is performed by a permanent gnss network called sirgas- con, where there are about 240 permanent stations in operation, distributed in south, central americas and caribbean region. the sirgas analysis centers were established in order to systematically determine the sirgas-con station coordinates, following the standards established internationally in order to support the maintenance of the system and the activities of the sirgas working group gt-i (reference system). since august 2008 the coordination of geodesy of the brazilian institute of geography and statistics - ibge officially took over the activities of an analysis center. this is a kind of daily work to which bigher and bigher dedication is given as the number of stations in the south american continent has been increasing rapidly in the recent years. other results are coming out; the station coordinates time series, thus enabling the determination of the station displacements due to the movement of the earth crust, local movements such as subsidence and / or local crustal uplift caused by natural phenomena such as earthquakes, as well as seasonal effects caused by several factors. at the same time, ibge also carried out the weekly combination of solutions from nine weekly sirgas analysis centers. this combination aims at comparing to the results to those obtained by dgfi (deutsches forschungsinstitut geod?tisches), which provides the final weekly solution from sirgas-con network. due to result accuracy, the change of any information in the processing can lead to certain changes in the coordinates and hence discontinuities in the time series of each station. recently, on april 17, 2011 (gps week 1632), the orbits (rapid and final fast), the corrections of the satellite clocks and model calibration of antennas provided by the international gnss service - igs, started to be referred to the new igs realization, named igs08. since then, there
Caracteriza??o físico-química do extrato fluido e seco por nebuliza??o de Symphytum officinale L.
Silva Júnior, José Otávio Carréra;Vieira, José Luiz Fernandes;Barbosa, Wagner Luiz Ramos;Pereira, Newton Lindolfo;
Revista Brasileira de Farmacognosia , 2006, DOI: 10.1590/S0102-695X2006000500014
Abstract: this work reports the obtaining of the symphytum officinale l. fluid extract dried by spray-drying and its physicochemical characterization by thermogravimetric analysis, spectroscopic and chromatographic techniques. hydroxyethylcellulose at 1,5% was used as technological adjuvant. we observed that the drying process by spray-dryer, on the established operational conditions, did not have influence in the characteristics of the dry extract constituents in relation to the fluid extract by the used techniques.
Diferentes fontes de P no desenvolvimento do meloeiro e disponibilidade de fósforo no solo
Silva, Michelangelo de Oliveira;Stamford, Newton Pereira;Amorim, Laerte Bezerra de;Almeida Júnior, Agenor Bezerra de;Silva, Monikely de Oliveira;
Revista Ciência Agron?mica , 2011, DOI: 10.1590/S1806-66902011000200003
Abstract: this work assessed the development of melon crops,and the availability of phosphorus in the soil with the use of biofertilizer phosphate after three cycles of culture. the treatments were distributed into randomized block design with three repetitions, arranged in a factorial 2 x 3 x 7, corresponding to two types of soils (yellow latossol and fluvic neosol); three sources of phosphorus (triple superphosphate, bio-fertilizer phosphate and rocks) and seven levels of phosphorus (0; 0.5; 1.0; 1.5; 2.0; 2.5; 3.0 of recommended for the culture and for each soil). the triple superphosphate fertilizer, biofertilizer rock phosphate and rock phosphate showed no significant differences in dry matter production, but the biofertilizer was the most available p in both soils after three cycles of the same culture.
Autonomic dysfunction in chronic liver disease
Frith J, Newton JL
Hepatic Medicine: Evidence and Research , 2011, DOI: http://dx.doi.org/10.2147/HMER.S16312
Abstract: utonomic dysfunction in chronic liver disease Review (3349) Total Article Views Authors: Frith J, Newton JL Published Date August 2011 Volume 2011:3 Pages 81 - 87 DOI: http://dx.doi.org/10.2147/HMER.S16312 James Frith, Julia L Newton NIHR Biomedical Research Centre in Ageing, Institute for Ageing and Health, Newcastle University, Newcastle, UK Abstract: It is becoming increasingly clear that quality of life (QOL) is impaired in those with chronic liver disease (CLD). One of the most important contributors to impaired QOL is the symptomatic burden which can range from slight to debilitating. Autonomic dysfunction accounts for a significant proportion of these symptoms, which can be common, non-specific and challenging to treat. Investigating the autonomic nervous system can be straight forward and can assist the clinician to diagnose and treat specific symptoms. Evidence-based treatment options for autonomic symptoms, specifically in CLD, can be lacking and must be extrapolated from other studies and expert opinion. For those with severely impaired quality of life, liver transplantation may offer an improvement; however, more research is needed to confirm this.
Autonomic dysfunction in chronic liver disease
Frith J,Newton JL
Hepatic Medicine: Evidence and Research , 2011,
Abstract: James Frith, Julia L NewtonNIHR Biomedical Research Centre in Ageing, Institute for Ageing and Health, Newcastle University, Newcastle, UKAbstract: It is becoming increasingly clear that quality of life (QOL) is impaired in those with chronic liver disease (CLD). One of the most important contributors to impaired QOL is the symptomatic burden which can range from slight to debilitating. Autonomic dysfunction accounts for a significant proportion of these symptoms, which can be common, non-specific and challenging to treat. Investigating the autonomic nervous system can be straight forward and can assist the clinician to diagnose and treat specific symptoms. Evidence-based treatment options for autonomic symptoms, specifically in CLD, can be lacking and must be extrapolated from other studies and expert opinion. For those with severely impaired quality of life, liver transplantation may offer an improvement; however, more research is needed to confirm this.Keywords: quality of life, treatment, fatigue, angiotensin II
Information Geometric Nonlinear Filtering
Nigel J. Newton
Mathematics , 2015, DOI: 10.1142/S0219025715500149
Abstract: This paper develops information geometric representations for nonlinear filters in continuous time. The posterior distribution associated with an abstract nonlinear filtering problem is shown to satisfy a stochastic differential equation on a Hilbert information manifold. This supports the Fisher metric as a pseudo-Riemannian metric. Flows of Shannon information are shown to be connected with the quadratic variation of the process of posterior distributions in this metric. Apart from providing a suitable setting in which to study such information-theoretic properties, the Hilbert manifold has an appropriate topology from the point of view of multi-objective filter approximations. A general class of finite-dimensional exponential filters is shown to fit within this framework, and an intrinsic evolution equation, involving Amari's $-1$-covariant derivative, is developed for such filters. Three example systems, one of infinite dimension, are developed in detail.
Infinite-Dimensional Statistical Manifolds based on a Balanced Chart
Nigel J. Newton
Statistics , 2013,
Abstract: We develop a family of infinite-dimensional Banach manifolds of measures on an abstract measurable space, employing charts that are "balanced" between the density and log-density functions. The manifolds, (\tilde{M}_\lambda, \lambda\in[2,\infty)), retain many of the features of finite-dimensional information geometry; in particular, the \alpha-divergences are of class C^{\lceil \lambda \rceil-1}, enabling the definition of the Fisher metric and \alpha-derivatives of particular classes of vector fields. Manifolds of probability measures, (M_\lambda, \lambda\in[2,\infty)), based on centred versions of the balanced charts are shown to be C^{\lceil \lambda \rceil-1}-embedded submanifolds of the \tilde{M}_\lambda. The Fisher metric is a pseudo-Riemannian metric on \tilde{M}_\lambda. However, when restricted to finite-dimensional embedded submanifolds it becomes a Riemannian metric, allowing the full development of the geometry of \alpha-covariant derivatives. \tilde{M}_\lambda and M_\lambda provide natural settings for the study and comparison of a variety of embedded parametric statistical models in a large class of estimation problems.
Medicinal plants used by the Kaiowá and Guarani indigenous populations in the Caarapó Reserve, Mato Grosso do Sul, Brazil
Bueno, Norlene Regina;Castilho, Rachel Oliveira;Costa, Reginaldo Brito da;Pott, Arnildo;Pott, Vali J.;Scheidt, Gessiel Newton;Batista, Marcelo da Silva;
Acta Botanica Brasilica , 2005, DOI: 10.1590/S0102-33062005000100005
Abstract: this ethnobotanical survey carried out with the kaiowá and guarani populations in the caarapó reserve (mato grosso do sul, brazil) showed that 34 plant species of 22 families with medicinal properties, are used for treating diverse pathologies. local names in portuguese and guarani are provided, along with therapeutic indications, modes of preparation, and a description of the plant parts used. these folk-medicine plants have been mostly used for the treatment of influenza, abdominal pain, fever and rheumatism, and for wound healing.
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