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Search Results: 1 - 10 of 114958 matches for " Michelle Leit?o Sossela "
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Michelle Leito Sossela,Eduardo Borba Neves
Revista Uniandrade , 2011,
Abstract: Esta pesquisa tem por objetivo avaliar as conseqüências do Assédio Moral para trabalhadores, organiza o e Governo. Para tanto, foi realizada uma revis o da literatura a fim de se compreender a problemática levantada. O Assédio Moral pode acarretar problemas para a saúde física e mental do trabalhador, podendo levá-lo ao afastamento de suas fun es; para a organiza o, prejuízo com treinamento e contrata o de pessoal substituto; e gastos excessivos, com a saúde do trabalhador, para os cofres públicos. Sugere-se a cria o de uma lei específica que venha a evitar a produ o e prolifera o deste fen meno.
Bioeconomy: The Challenge in the Management of Natural Resources in the 21st Century  [PDF]
Alexandra Leito
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.411002
Countries and regions around the world face a number of economic, environmental and social challenges. Increased demand for energy, primary resources (agricultural, forestry and fishing), industrial products and services (healthcare in particular) put significant pressure on the sustainability of the ecosystems that support our society. One option to provide a more sustainable base for the economy would be the transition towards bioeconomy in which the importance of biotechnology and biomass- based production to generate economic output is significantly greater than today. Bioeconomy is considered to encompass all economic activity connected with the utilization of renewable biological resources. The aim of this paper is to draw attention to the importance of bioeconomy in the management of natural resources in the 21st century, providing many answers to resolve the previous challenges together with environmental preservation. The concept has gained scientific and political attention during the recent years, especially in Europe but also globally. From the review and analysis of the literature, this paper addresses the emerging bioeconomy, definitions and conceptual bases, and its great potential in different sectors of economic activity and development of new products. Special emphasis is placed on the case of the European Union. We present the concerns of European authorities at this level and best practices already in force in two Nordic countries that can be regarded as the beginning of a general transition to bioeconomy.
The Use of HRP in Decolorization of Reactive Dyes and Toxicological Evaluation of Their Products
Michelle Reis da Silva,Lívian Ribeiro Vasconcelos de Sá,Carlos Russo,Elita Scio,Viridiana Santana Ferreira-Leito
Enzyme Research , 2010, DOI: 10.4061/2010/703824
Abstract: This work studied the potential use of horseradish peroxidase (HRP) in the decolorization of the following textile dyes: Drimarene Blue X-3LR (DMBLR), Drimarene Blue X-BLN (DMBBLN), Drimarene Rubinol X-3LR (DMR), and Drimarene Blue CL-R (RBBR). Dyes were individually tested in the reaction media containing 120?mg·L-1, considering the following parameters: temperature (20–45°C), H2O2 concentration (0–4.44?mmol·L-1), and reaction time (5 minutes, 1 and 24?h). The following conditions: 35°C, 0.55?mmol·L-1, and 1h, provided the best set of results of color removal for DMBLR (99%), DMBBLN (77%), DMR (94%), and RBBR (97%). It should be mentioned that only 5 minutes of reaction was enough to obtain 96% of decolorization for DMBLR and RBBR. After the decolorization reactions of DMBLR, DMR, and RBBR, it was possible to observe the reduction of Artemia salina mortality and the no significant increase in toxicity for the products generated from DMBBLN. 1. Introduction The textile industry is a large consumer of energy and potable water, mainly after dyeing in the washing procedures. During industrial processing, up to 40% of the used dyestuffs are released in the effluent. Considering the high discharged volumes and their composition, wastewater from textile industries can be considered as one of the most polluting in all industrial sectors, thus requiring appropriate treatment technologies [1]. The removal of color from effluent is one of the major problems that the textile industry faces. The presence of color hinders the absorption of solar radiation, thus reducing the natural photosynthetic activity, causing changes in aquatic biota. Moreover, many of these dyes present acute or chronic toxicity on the ecosystems [2]. When compared to natural dyes, reactive dyes are extensively used in the textile industry due to their easy use, cost effectiveness in synthesis, stability, variety of colors, and better dyeing processing conditions [3–5]. On the other hand, many synthetic dyes are resistant to biological degradation due to the presence of large content of aromatic structure, complex molecules, and synthetic origin; thus, the decolorization of textile dye effluent does not occur when treated in conventional effluent treatment systems [3, 6, 7]. Different techniques of color removal have been studied, such as adsorption, precipitation, oxidation, coagulation-flocculation, chemical degradation and photodegradation. These methods have different color removal capabilities and capital costs. Coagulation and adsorption are the most commonly used but generate large
Prevalência da co-infec??o HIV-sífilis em um hospital universitário da cidade do Rio de Janeiro no ano de 2005
Signorini, Dario José Hart Pontes;Monteiro, Michelle Carreira Miranda;Sá, Carlos Alberto Morais de;Sion, Fernando Samuel;Leito Neto, Hilton Gueiros;Lima, Dulcino Pirovani;Machado, Jo?o Dario do Carmo;
Revista da Sociedade Brasileira de Medicina Tropical , 2007, DOI: 10.1590/S0037-86822007000300006
Abstract: this was a study on the prevalence of hiv-syphilis coinfection among 830 hiv/aids patients who were being followed up as outpatients at a hospital in rio de janeiro between january and may 2005. the participants underwent laboratory tests at the venereal disease research laboratory (vdrl) consisting of cd4+/cd8+ cell counts and viral load tests. they answered questions about their sociodemographic characteristics and past medical history of syphilis. the prevalence of syphilis was 2.7% (22 patients) and the ratio between men and women with coinfection was approximately 4:1. homosexual men were the category most affected. we did not find any association between coinfection and age, schooling and the laboratory parameters tested. out of the total number of patients with syphilis, 73% (16) reported previous treatment; of these, 14 (88%) were reinfected, while two (12%) underwent inappropriate treatment. the presence of hiv-syphilis coinfection among patients undergoing routine follow-up signals the need to advise them to adopt safe sex practices, during their outpatient visits.
GMM Estimator: An Application to Intraindustry Trade
Nuno Carlos Leit o
Journal of Applied Mathematics , 2012, DOI: 10.1155/2012/857824
Abstract: This paper investigates the determinants of intraindustry trade (IIT), horizontal IIT (HIIT), and Vertical IIT (VIIT) in the automobile industry in Portugal. The trade in this sector between Portugal and the European Union (EU-27) was examined, between 1995 and 2008, using a dynamic panel data. We apply the GMM system to solve the problems of serial correlation and the endogeneity of some explanatory variables. The findings are consistent with the literature. The difference between per capita incomes and factor endowments present a positive sign. These results are according to Heckscher-Ohlin predictions. The economic dimension has a positive impact on trade. A negative effect of the distance on bilateral trade was expected and the results confirm this, underlining the importance of neighbour partnerships for all trade.
Mudan?as no sistema tributário e no mercado de crédito e seus efeitos sobre a informalidade no Brasil
Paes, Nelson Leito;
Nova Economia , 2010, DOI: 10.1590/S0103-63512010000200004
Abstract: in this paper we analyze the impacts of some changes in tax and credit policies on informal business in brazil. to do this, we use a computable general equilibrium approach. the main findings shows that a reduction in 1% of tax rates on production or on labor income or capital income can reduce the size of the informal sector and the number of informal jobs, without reducing tax revenue.a more accurate result can be obtained with a reduction in the cost of credit instead of using lower tax rates. the most effective policy seems to be the reduction of taxes on production.
Os impactos da altera??o da contribui??o previdenciária patronal para a indústria
Paes, Nelson Leito;
Estudos Econ?micos (S?o Paulo) , 2012, DOI: 10.1590/S0101-41612012000400005
Abstract: for various reasons, the brazilian industry is losing internal and external competitiveness. recently launched the program "brasil maior" includes, among other actions, the change in the incidence of employer pension contributions of some sectors, leaving the incidence on the payroll to focus into the gross revenue (mp 540/2011). this paper has estimated the impact of this change, considering a 20% increase in rates of cofins to maintain tax neutrality. the results suggest there will not be major macroeconomic consequences, although the industrial sector showed strong growth of output and employment, with small reductions in agriculture and services.
Reforma tributária: os efeitos macroecon?micos e setoriais da PEC 233/2008
Paes, Nelson Leito;
Estudos Econ?micos (S?o Paulo) , 2011, DOI: 10.1590/S0101-41612011000200011
Abstract: in spite of a disappointed historical, the brazilian government sent a new tax reform proposal to the national congress, pec 233/2008. the proposals unify some of the federal consumption taxes into a federal vat, simplifies icms legislation, reduce investment and social securities rates and rates applied to essential goods. in order to analyze this change, it was constructed a general equilibrium model with 55 firms of the economy. the results suggest a moderate expansion of aggregate output, consumption, employment and investment with a little loss in revenues and a gain in welfare. also, we have substantial changes in sectorial output, with a tendency of increasing the share of farm and industrial sectors in detriment of services.
Semiconductors and Dirichlet-to-Neumann maps
Leito, Antonio;
Computational & Applied Mathematics , 2006,
Abstract: we investigate the problem of identifying discontinuous doping profiles in semiconductor devices from data obtained by the stationary voltage-current (vc) map. the related inverse problem correspond to the inverse problem for the dirichlet-to-neumann (dn) map with partial data.
Argumenta??o e desenvolvimento do pensamento reflexivo
Leito, Selma;
Psicologia: Reflex?o e Crítica , 2007, DOI: 10.1590/S0102-79722007000300013
Abstract: the main goal of this article is to offer a perspective from which the relations between argumentation and reflection can be investigated. the main argument proposed is that the same semiotic-dialogic mechanism that constitutes argumentation (supporting a view with reasons, considering objections and responding to opposition) has a built-in capacity to place the arguer's thinking in a metacognitive framework. together, they are effective in orienting the thinking a person does towards examining the bases and limits of his/her own thoughts. they do so by introducing into the person's psychological field a new object for reflection the arguer's own thoughts. at the second section of the article, the analysis of some fragments of children's argumentation produced in classroom illustrates how the framework proposed can be used in investigating the development of self-regulated reflection.
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