Determinação de complexos de urânio em solo usando a técnica de difusão em filmes finos por gradiente de concentração (DGT)

This paper proposes to assess the lability of complexes of uranium in soil using the technique of Diffusion in Thin Films by concentration gradients (DGT) in the vicinity the Osamu Utsumi mine, located in the municipality of Caldas - MG. The technique is based on the 1ª Fick Law, where metal complexes diffuse through a gel, which in turn is adsorbed on a resin. The metals adsorbed are recovered by an analytical technique and quantified by optical emission spectrometer with plasma inductively coupled (ICP-OES) or mass spectrometry with inductively coupled plasma (ICP-MS)

Determinação de Cd, Cu, Ni, Pb e Zn em águas marinhas oriundas da Bacia Potiguar utilizando a técnica de difusão em filmes finos por gradiente de concentração (DGT)

The DGT technique has been used to determine and better understand the dynamics and bioavailability of metals in the sea near to marine outfalls. In this work, the DGT was assessed for the determination of Cd, Pb, Cu, Zn and Ni in marine water samples from Potiguar Basin in its conventional aspect (binding agent, Chelex-100 and diffusive agent: Diffusive polyacrylamide gel (D) and restrictive (R)) and determination of Pb and Cd through its alternative aspect (binding agent: Saccharomyces cerevisiae immobilized in agarose gels and diffusive agent: 3MM Chromatography Paper). The deployment curves for long periods of immersion in the sample, showed a good linear correlation for the conventional aspect to Zn (D: R²=0.9586, R: R²=0.9444), Ni (D: R²=0.9789, R: R²=0.9286) and Cu (D: R²=0.764, R: R²=0.8143), and alternative to Pb (R²=0.9228) and Cd (R²=0.9673). The results of the organic and inorganic composition analysis in conventional aspect, showed that for every element there is no significant fraction of organic compounds in the sample. In addition, considering the alternative aspect, the comparison of obtained and expected masses suggests that some of the Pb is not labile and that the main retention mechanism of Pb for S. Cerevisiae occurs through ion exchange

Estudo das políticas de obtenção dos assentamentos de reforma agrária no Brasil entre 1985 e 2009

Understanding the territorial transformations is important to the geographic knowledge, especially when it is related to structural questions as agrarian one. In this way, the land acquisition to agrarian reform enables us to understand some of these transformations, represented by territorialization of landless workers in rural settlements, that are concrete results of the struggle for land that boost the policies of agrarian reform in our country. The renewal of the agrarian structure is fundamental to the concept of land reform and also provides that advances social, political, cultural, economic, etc. Classified as a country with rates of the highest land concentration in the world, Brazilian government attempts to base his actions to take in the expropriation of land the main character of the land reform. However, new policies have been gradually used to obtaining the rural settlements, in a process that Fernandes (2010) called the reconceptualization of land reform. Starting in 1985, Brazil has 63% of the beneficiaries of land reform policies settled on expropriated land, the rest is a result of incorporation policies such as land regularization, of land reform and land purchase. Such policies generate changes in agrarian structure, that is the goal of land reform, but don´t concentrate to the land ownership. This attitude of the state in coping with the agrarian question is his response to the pressures of capitalist agriculture represented by landowners and agribusiness, coping catching an intense and uneven territorial dispute with peasant agriculture, in an attempt to impose its model of development for the field. The aimed of this present study is to understand better the land reform acquisition and its implications in the Brazilian territory, in order to understand it in their multiplicity.

Estudo da concentração de material particulado em ambientes internos e externos de bibliotecas

Our twenty-first century society and the rhythm of life and work we have to face in our daily routine compel us to spend most of our lifetime in closed environments, in our houses, educational institutions, hospitals, airports, amongst as many others. The study of the air quality in internal environments (IAQ) is very important for monitoring people’s health effects and their environmental comfort in these locations. One essential parameter to analyze this measure is to evaluate the concentration of dispersed particulates in the air, specially focusing on those thinner particles (below the diameter of 2,5 μm), they can pose serious risks for human being because they can remain in the lungs, penetrate through the pores of our skin, amongst other harmful effects on human’s health. In this work the air quality inside the public library Profª Josina Vasques Ferrari and at Unesp public state library was evaluated, both located in Itapeva, as well as a third one, inside the Communitarian Library of the Federal University in Carlos (UFSCar) from march to may in 2012. In those environments it was analyzed if the concentration of particulates pose any real treat to the users. The equipment used for particle sampling in real time was DataRam 4 (Model DR 4000). The results given for those concentrations of particulates in both internal and external environments revealed figures within the safe standard established by the WHO (World Health Organization), from 25 to μg/m³, the only exception occurred on the fifth floor of the UFSCar library, where the average for concentration stayed at 25,30 of μg/m³

Avaliação de concentração de citocinas no soro de pacientes portadoras de lesão intraepitelial escamosa de baixo grau, lesão intraepitelial escamosa de alto grau e carcinoma cervical invasor

A infecção genital por Papilomavírus Humano (HPV) é uma das doenças sexualmente transmissíveis (DST), de origem viral, mais prevalente no mundo. As lesões intraepiteliais escamosas de baixo grau (LIEBG) e de alto grau (LIEAG), assim como carcinoma cervical invasor (CCI), estão associadas à presença do HPV. A resposta imune tem papel importante na infecção pelo HPV na cérvice uterina, sendo as citocinas importantes reguladoras da transcrição viral. Avaliar a concentração de IL-1β, IL-2, IL-4, IL-5, IL-6, IL-8, IL-10, IL-12, IFN-γ e TNF-α no soro de mulheres portadoras de LIEBG, LIEAG e CCI. Foram incluídas no estudo 40 mulheres com diagnóstico histopatológico de LIEBG (n=11), LIEAG (n=10), CCI (n=10) e 9 mulheres com suspeita de doença HPV induzida, mas sem alterações histopatológicas na biópsia do colo do útero (controle), atendidas no Ambulatório de Colposcopia da Faculdade de Medicina de Botucatu (UNESP) e no Ambulatório de Ginecologia Preventiva do Hospital Amaral Carvalho, Jaú, SP. O sangue periférico foi colhido por punção venosa e o soro armazenado até o processamento. A dosagem das citocinas no soro foi avaliada por ensaio imunoenzimático (ELISA). A pesquisa de HPV foi realizada empregando-se a técnica da reação em cadeia da polimerase (PCR). Os dados sócio-demográficos foram obtidos por entrevista no momento da consulta ginecológica. A mediana de idade das pacientes do grupo controle, LIEBG, LIEAG, e CCI foi de 38 (21-69), 32,5 (17-51), 39 (23-65) e 51,5 (29-72), respectivamente. Houve diferença estatisticamente significante de mediana de idade das pacientes do grupo CCI quando esta foi comparada com os demais grupos. Em relação às características das pacientes, 76% eram brancas, 68% relataram união estável, 31% concluíram o 2º grau, 42% eram fumantes, 37% das mulheres relataram 3 ou mais parceiros sexuais durante... (Resumo completo, clicar acesso eletrônico abaixo)

Geração de energia elétrica a partir da concentração solar

The current world's need for clean and renewable energy sources aligned with the strong Brazilian growth looking to diversify its electric power generation sources, highly dependent on hydropower and petroleum encourages the implementation of technologies that reach this growth with diversity and cleaning. The sun energy source is considered inexhaustible and can meet the demand for energy through thermo solar plants to generate electricity. Several technologies are being studied and developed in the world and they can be used to generate electricity from the solar concentration, but in Brazil its use is still not found commercially. It is therefore essential to understand these technologies and develop knowledge about them so they can be implemented in Brazil. This work brings an overview of the thermo solar generation in Brazil, showing the different technologies and a thermodynamic simulation of one of such technologies considering a hybrid plant with complementary generation biomass, aiming at the generation of 1 MW in the Brazilian Northeast

Concentração de tensões em peças e componentes estruturais - uma abordagem através do método dos elementos finitos

Any failure process that may occur in a part probably is located where the stress exceeded the level of resistance. When a part or component has a sharp change in geometry, such as slots, holes, grooves, bumps or other irregularities, there is an increased concentration of stress at a specific location of the part. The objective of this study is to determine the maximum stresses in structural parts and components using the equations of elasticity theory in conjunction with the stress concentration factor experiment and compare them with results obtained by finite element method

Análise da influência da concentração de feixeis de fibras de bambu em ensaios de piso

Bamboo has one of the highest growth rates among plants, however, its lignifications (which confers resistance) takes around a few years and, therefore, certain physical characteristics and mechanical, that depend on this process will only be acquired between the three to six years old. In addition, bamboo also has significant density variations in different parts of the stem, both in the radial direction as the axial. In particular the radial direction, where the density found in the inner and outer (near the bark) of a single stem can range on average from 0.5 to 0.9 g/cm3. Thus, the application of bamboo as a floor, there to examine whether both sides of the bamboo (internal and external), provide resistance properties required for that purpose. In this study sought to characterize and quantify the influence of the concentration of fiber bundles in the inner and outer sides of rules or bamboo strips of bamboo flooring through testing service. Analyses performed were based on ASTM D 2394- 83 for wooden floors and derivatives. This was necessary because of the absence of a specific prohibition of the use and testing of floors made of bamboo and its products. The data were analyzed by ball indentation test shooting, test for resistance to abrasion, indentation test for stress / load treadmill test and by indentation loads applied to small areas - test the jump. The results of the tests were extremely friendly bamboo, even this presents considerable differences between the resistances obtained from assay of the cover of the inner and outer face, being comparable with those of many commonly used to manufacture wood flooring. This comparison was made possible by information from technical trials of several floors made with wood

Avaliação da membrana de troca aniônica DE 81 como ligante ba técnica de difusão em filmes finos por gradientes de concentração (DGT) para a determinação de Cromo VI

It is known that there is a wide variety of bioavailable trace metals in aquatic systems, and its determination is fundamental to predict impacts to organisms in these environments. However, the determination of the total concentration of chemicals in aquatic systems, despite its importance, does not provide necessary information for decision making or even may lead to misinterpretation of the procedures and potential risks to the system in question. This study aimed to use the technique of diffusion in thin films by concentration gradients (DGT) to evaluate the anion exchange membrane Whatman DE 81 as binder alternative in determining Cr (VI). Experiments were carried out to determine the diffusion coefficients for the material used diffusion (agarose gel). The behaviors of the binders were analyzed before the main variables of the systems, immersion time, pH and ionic strength. Then was made the assessment of potential interferences, to finally proceed with testing using actual samples in the laboratory and in situ

A construção social da identidade territorial em dois assentamentos humanos na cidade de Huánuco - Peru

O trabalho analisa como se estabelece o processo de construção social de uma identidade territorial em dois assentamentos humanos na cidade de Huánuco, Peru. Os processos de assentamento se configuram por movimentos migratórios autônomos, por processo de migração forçada (refugiados), ou por políticas públicas específicas de assentamentos humanos, seja por instrumentos de reforma agrária e ou por reordenamento territorial, bem como por iniciativas concretas construídas pelos sujeitos a partir de sua atuação em movimentos sociais. Estes últimos se estabelecem de forma mais acentuada na América Latina, no campo e na cidade, por meio dos movimentos sociais de luta pela terra; no Brasil, em particular no campo, o MST se constitui em um grande protagonista, assim como em lutas por moradia também se encontra um movimento mais articulado denominado Movimento dos Sem Teto. Buscou-se compreender melhor como esses movimentos ocorrem no Peru e tendo como base empírica o município de Huánuco. Destaca-se que esse processo de reorganização espacial dos sujeitos gera dúvidas quanto a se constituir em um território de emancipação, de constituição de liberdade organizativa e de gestão, com capacidade de se transformar em elemento de alteridade, ou simplesmente de subordinação, confinamento, não permitindo a constituição de uma comunidade livre e autônoma. Diante destas questões exige-se uma reflexão sobre o processo de construção social de uma identidade territorial, como forma de entender as dinâmicas de apropriação territorial que se efetiva por comunidades nesta nova espacialidade ocupada e vivenciada, delimitando claramente se esta espacialidade constitui um território per si ou em si. Para Sartre o per si é o fazer conscientemente, construindo para si significação sobre sua existência prática e cotidiana no mundo... (Resumo completo, clicar acesso eletrônico abaixo)

Regiões competitivas agrícolas e vulnerabilidade territorial: o papel do Consórcio Pesquisa Café

This academic work presents the final results of the undergraduate research about new agricultural technical systems developed by “Consórcio Pesquisa Café” (CPC), which main objective was to analyze the impacts of scientific inputs in different coffee producing regions, particularly in South of Minas Gerais. The creation of the CPC meets the demands of a global scientific coffee-growing (SANTOS, 2000) under development in the current period technical-scientific-informational (SANTOS, 2009). On this period, also called globalization, the technoscience, the information and the finances guide the actions of companies and institutions submitted by imperative of competitiveness on international market. The Brazilian’s coffee-growing regions (South of Minas Gerais, Cerrado Mineiro, Espírito Santos Ridge’s, Western Bahia, among others) on search of higher productivities, begin gather technical, informational and communicational densities (SANTOS, 2009). Considering these facts, we detail in this research, the major agricultural technical systems developed by “Consórcio Pesquisa Café” (CPC), expressed in new management techniques, new cultivars and new chemicals, mechanical and biological inputs. In the concluding part of this undergraduate research we analyze how these new technical systems contribute to increased competitiveness and vulnerability of South of Minas Gerais in front of international market

As políticas de crédito do BNDES e suas consequências no desenvolvimento territorial do estado de São Paulo (2006 - 2010)

Based on investment strategies, the history of the BNDES and the economic policy current between the years 2006 and 2010, this paper presents an analysis of the support given by the Bank in the state of São Paulo, trying to see how these influenced the territorial structure and development of this state in the period

Avaliação da membrana P81 como agente ligante da técnica de difusão em filmes finos por gradiente de concentração (DGT) para determinação de mercúrio em sistemas aquáticos

Worldwide environmental degradation is an undesirable byproduct resulting from the increasing demand for natural resources. Water sources are suffering intense contamination since they usually receive a huge amount of domestic and industrial effluents - which are mostly wasted without proper treatment - inserting a large number of pollutants in the environment, heavy metals included. Mercury holds great toxicological importance because, under some physicochemical conditions in a water environment, Hg (II) ion turns into methylated compounds stemming from this element, such as methylmercury CH3Hg, which is highly toxic for the aquatic community in which bioaccumulation occurs. Nowadays passive sampling techniques are being developed to enable the analytical procedures which are applied in environmental monitoring. Diffusive gradients in thin-films technique (DGT) has been proven an interesting tool for the determination of labile metal species due to its in situ application. The DGT technique consists of a piston-like device on which the following series of agents is disposed: a binding agent (conventionally Chelex 100 resin), a diffusive agent, usually a polyacrylamide gel, and a membrane filter. Nevertheless, the agents conventinally used for this technique don't usually show satisfactory results in mercury sampling. The main goal of this study was to evaluate the phosphate-treated cellulose membrane (Whatman P 81), an alternative material, as binding agent in the DGT to determine labile mercury fractions in aquatic systems. In this context, we conducted a study of the behavior of this material in relation with system variables, pH and ionic strength. Afterwards we performed immersions of the DGT devices in real and enriched samples and in situ aiming the determination of mercury

Políticas públicas e desenvolvimento Territorial: o Programa Territórios da Cidadania no Estado de São Paulo

Pós-graduação em Geografia - FCT

Efeitos da redução da concentração de sódio na solução de hemodiálise e no conteúdo de sódio da dieta sobre a resposta inflamatória de pacientes com doença renal crônica

Pós-graduação em Fisiopatologia em Clínica Médica - FMB