542 research outputs found

    OPM3® Portugal project: information systems and technologies organizations: outcome analysis

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    Increasing the maturity in Project Management (PM) has become a goal for many organizations, leading them to adopt maturity models to assess the current state of its PM practices and compare them with the best practices in the industry where the organization is inserted. One of the main PM maturity models is the Organizational Project Management Maturity Model (OPM3®), developed by the Project Management Institute. This paper presents the Information Systems and Technologies organizations outcome analysis, of the assesses made by the OPM3® Portugal Project, identifying the PM processes that are “best” implemented in this particular industry and those in which it is urgent to improve. Additionally, a comparison between the different organizations’ size analyzed is presented

    Endogenous iron as a photo-Fenton reaction catalyst for the degradation of Pah's in soils

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    Polycyclic aromatic hydrocarbon (PAH) components of diesel fuel are considered hazardous, due to their toxicity. We report the degradation of 16 PAHs using photo-Fenton and photo-Fenton-like processes in two different soil samples (S1 and S2) artificially contaminated with diesel oil. Experimental factorial designs were used to determine the most effective treatment conditions, with a view to achieving economical feasibility. For photo-Fenton reactions, the best degradation conditions resulted in an overall PAH concentration reduction of 94.6% and 95.6% for soils S1 and S2, respectively. The photo-Fenton-like processes also led to satisfactory degradation levels, obtained with only endogenous iron, low hydrogen peroxide concentration, short exposure time and no soil pH adjustment. These results demonstrate the viability of photo-Fenton-like processes to treat PAH contaminated areas.Hidrocarbonetos policíclicos aromáticos (HPA) estão presentes no óleo diesel, sendo considerados perigosos devido à sua toxicidade. Neste estudo relatamos a degradação de 16 HPA em dois solos diferentes (S1 e S2) contaminados artificialmente com óleo diesel, usando processos foto-Fenton e pseudo-foto-Fenton. Planejamentos fatoriais foram usados para obter condições de tratamento mais eficientes e econômicas. Para a reação foto-Fenton, as condições mais favoráveis resultaram 94,6% e 95,6% de degradação dos HPA para os solos S1 e S2, respectivamente. O processo pseudo-foto-Fenton também apresentou um nível satisfatório de degradação, obtido em condições econômicas, com ferro endógeno, baixa concentração de peróxido, curto tempo de exposição à radiação e sem ajuste do pH do solo. Os resultados demonstram a eficiência do processo pseudo-foto-Fenton para tratar áreas contaminadas por HPA.329336Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES

    Termites as natural agents of postdepositional taphonomic alterations in a human skeleton from Toca do Enoque archaeological site (Piauí, Brazil)

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    Las termitas son insectos que aparecen muchas veces en contextos arqueológicos en Brasil y casi nunca son objeto de estudio como procesos naturales de formación de los depósitos y contextos arqueológicos. La probabilidad de que se encuentren marcas de estos insectos modificadores de carcasas de animales y humanos en sitios arqueológicos en Brasil y en Sudamérica hace pertinente su estudio. A partir de una aproximación teórica - metodológica que comprende la Icnoarqueología y la Arqueoentomología Funeraria, presentamos el caso de estudio de un esqueleto humano con señales de bioerosión debidas a la acción de termitas subterráneas en el sitio arqueológico Toca do Enoque (Piauí, nordeste de Brasil) del Holoceno Medio. Guiados por un protocolo de estudio actualístico, pudimos registrar que el patrón de daños  observado en los huesos resultó ser consistente con el comportamiento osteofágico de ciertas especies de termitas endémicas de la región Neotropical (Familia: Termitidae). El análisis macroscópico muestra la importancia de reconocer a los isópteros subterráneos como agentes tafonómicos naturales que pueden actuar en la degradación postdeposicional de restos óseos humanos provenientes decontextos funerarios arqueológicos.Termites are insects that often appear in archaeological contexts in Brazil, that are almost never studied as natural processes of deposit formation and archaeological contexts. The probability of founding marks of these insects that modify carcasses of animals and humans in archaeological sites in Brazil and South America makes their study relevant. From a theoretical - methodological approach that includes Icnoarchaeology and Funeral Archeoentomology, we present the case study of a human skeleton with signs of bioerosion due to the action of subterranean termites in the archaeological site at Toca do Enoque (Piauí, northeastern Brazil) from the Middle Holocene. Guided by an actualist study protocol, we were able to record that the pattern of damage observed in the bones was consistent with the osteophageal behaviour of certain termite species endemic to the neotropical region (Family: Termitidae). The macroscopic analysis shows the importance of recognizing subterranean termites as natural taphonomic agents that act in postdepositional degradation of human bone remains from archaeological burial contexts

    Grazing Management Flexibility in Pastures Subjected to Rotational Stocking Management: Herbage Production and Chemical Composition of Kikuyu-Grass Swards

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    Several recent papers published on tropical pastures have pointed out that under rotational stocking management regrowth should be interrupted when canopy light interception is 95% (LI). Further, these studies have revealed a positive and high correlation between LI and sward height, allowing LI management targets to be defined in terms of sward height. However, there are some indications that lower pre-grazing heights relative to those targets would result in similar leaf accumulation without interfering with sward persistence. The objective of this paper was to verify a possible flexibility of such pre-grazing height targets. A replicated experiment was conducted with treatments corresponding to four pre-grazing height targets (25 cm, corresponding to a canopy light interception of 95%; 20; 15 and 10 cm), which were associated with a single severity of grazing equivalent to removal of 50% of initial height, leaving four post-grazing heights (12.5, 10.0, 7.5 and 5 cm, respectively). Preliminary results indicated that there were no differences in rate of herbage accumulation, herbage yield and crude protein, NDF and ADF contents on swards managed with the pre-grazing targets of 15, 20 and 25 cm. Swards managed with the 10 cm pre-grazing target had the highest contents of CP and lowest contents of NDF and ADF, but herbage accumulation was reduced. Overall, the findings indicate that there may be some flexibility in targets of pre-grazing sward height, provided that defoliation severity is moderate and does not interfere with herbage yield and quality. In that context, targets of pre-grazing sward height defined in terms of canopy light interception would correspond to the maximum value of the possible range of values to be used

    Expression of Hsp60 and its cell location in Paracoccidioides brasiliensis

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    Paracoccidioides species cause paracoccidioidomycosis (PCM), a systemic mycosis highly prevalent in Brazil. Therapy of PCM has some issues that make studies for new therapeutic and vaccine targets relevant, such as the P. brasiliensis 60-kDa-heat-shock protein (PbHsp60), an immunogenic antigen that induces protection in experimental mice infection. Here, we investigated the relative expression of mRNA for PbHsp60 in P. brasiliensis in the different morphotypes of P. brasiliensis and in morphological transition phases. In addition, antibodies to rPbHsp60 were produced and used to analyze the location of PbHsp60 in yeast and hyphae by electron microscopy. The analyses showed a substantial increase in the relative amounts of HSP60 mRNA in yeast when compared to mycelium and an intermediate expression in transitional forms. Regarding the cell location, immunoelectron microscopy analysis revealed that PbHsp60 is within the cell wall. These observations suggest that this protein may be involved in the maintenance of the cell wall integrity and the interaction with the host for colonization, infection and pathogenesis

    Major aspects of the mercury cycle in the Negro River Basin, Amazon

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    Despite the low level of industrial activity and human density, Hg concentration in the Negro River basin is relatively high. Soil enriched with naturally high Hg concentrations and atmospheric deposition are the main sources of the metal in this watershed. Differences between invasive and evasive fluxes at the water/air and soil/air interfaces indicate Hg accumulation in the basin at a rate of 39.9 t y-1. The type of soil, which is the main source of mercury for the water bodies, the hydrological cycle with floods and dry periods, act markedly on the water redox chemistry. A complex interaction between many seasonable variables such as solar intensity, water pH, age of the naturally occurring organic matter and the hydrological cycle alter the redox characteristics of these black water bodies, thus markedly affecting the consumption of Hg0 and the degradation of methylmercury present in the water. Although methylation is favored in black waters, photodegradation counterpoints this formation, thus regulating the methylmercury burden in the water column.Embora com pouca atividade humana, as concentrações de Hg na bacia do Rio Negro são relativamente altas. A presença natural de Hg em solos e a deposição atmosférica são as principais fontes deste metal. O balanço entre fluxos invasivos e evasivos sugerem o seu acúmulo no interior da bacia em 39.9 t ano-1. O tipo de solo, fonte de metal para os rios, e o ciclo hidrológico com períodos de cheia e seca atuam sobre a química redox das águas. A conjunção sazonal de fatores como a natureza da matéria orgânica, pH ácido e radiação solar permitem que as águas pretas oscilem de redutora a oxidante, onde, por sua vez, ocorre o consumo de Hg0 e degradação do metilmercúrio. Deste modo, o fluxo do mercúrio pode ser invasivo ou evasivo. Embora a metilação seja mais favorecida em águas pretas, a fotodegradação do metilmercúrio se contrapõe ao seu acúmulo, contribuindo para regular o estoque deste composto na coluna água.11271134Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

    Major aspects of the mercury cycle in the Negro River Basin, Amazon

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    Despite the low level of industrial activity and human density, Hg concentration in the Negro River basin is relatively high. Soil enriched with naturally high Hg concentrations and atmospheric deposition are the main sources of the metal in this watershed. Differences between invasive and evasive fluxes at the water/air and soil/air interfaces indicate Hg accumulation in the basin at a rate of 39.9 t y(-1). The type of soil, which is the main source of mercury for the water bodies, the hydrological cycle with floods and dry periods, act markedly on the water redox chemistry. A complex interaction between many seasonable variables such as solar intensity, water pH, age of the naturally occurring organic matter and the hydrological cycle alter the redox characteristics of these black water bodies, thus markedly affecting the consumption of Hg-0 and the degradation of methylmercury present in the water. Although methylation is favored in black waters, photodegradation counterpoints this formation, thus regulating the methylmercury burden in the water column

    An Inherited Small Microdeletion at 15q13.3 in a Patient\ud with Early- Onset Obsessive-Compulsive Disorder

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    Copy number variations (CNVs) have been previously associated with several different neurodevelopmental psychiatric\ud disorders, such as autism, schizophrenia, and attention deficit hyperactivity disorder (ADHD). The present study consisted of\ud a pilot genome-wide screen for CNVs in a cohort of 16 patients with early-onset obsessive-compulsive disorder (OCD) and\ud 12 mentally healthy individuals, using array-based comparative genomic hybridization (aCGH) on 44K arrays. A small rare\ud paternal inherited microdeletion (,64 kb) was identified in chromosome 15q13.3 of one male patient with very early onset\ud OCD. The father did not have OCD. The deletion encompassed part of the FMN1 gene, which is involved with the\ud glutamatergic system. This finding supports the hypothesis of a complex network of several genes expressed in the brain\ud contributing for the genetic risk of OCD, and also supports the glutamatergic involvement in OCD, which has been\ud previously reported in the literature.We wish to thank the patients and heathy controls who volunteered to participate in this study.This study was supported by grants to Dras Cappi and Brentani from the Foundation for Research Support of the State of São Paulo (FAPESP); grant number: 2008/11537-7, and from the Brazilian National Council for Scientific and Technological Development (CNPq; protocol number MCT/CNPq 14/2008). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript
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