Alianças eleitorais em Natal (2008): O PT e seus aliados

Este estudo faz uma abordagem sobre as alianças eleitorais, destacando duas vertentes importantes nos processos de suas formações nas arenas políticas. Na primeira parte do trabalho é feita uma análise mais geral a respeito da problemática em questão. Onde dois ciclos políticos são analisados, apresentando o comportamento político-partidário dos partidos no Brasil. No primeiro ciclo, uma breve compreensão da política café-com-leite na República Velha, na qual, PRP e PRM dominam politicamente a arena nacional. O segundo ciclo, compreendido de 1945 a 1964, foram analisados os processos eleitorais estaduais e nacionais. Nestes, os resultados analíticos mostram o que refletem no comportamento político-partidário dos partidos do passado e do presente no país. Outro aspecto importante também abordado na primeira parte foi a verticalização das alianças eleitorais, a qual teve como objetivo impor harmonia partidária entre os partidos nas formações das alianças eleitorais. Revendo esse processo político, vimos que, a imposição da verticalização não resolveu o problema da inexistência harmônica dos partidos no ato da formação das alianças eleitorais tocante ao espectro ideológico. A segunda parte da pesquisa está dividida em duas partes. A primeira faz uma análise sobre a trajetória política do PT e suas políticas de alianças, que se inicia no V Encontro Nacional do Partido em 1987. Como consequência da expansão partidária, outras políticas de alianças são aprovadas pelo Partido dos Trabalhadores. Na segunda parte, é trabalhada as eleições municipais de 2008 em Natal, que observa analiticamente a campanha do PT e as alianças eleitorais realizadas pelo Partido para participar do pleito. Os velhos adversários políticos e oligárquicos formaram alianças com PT. Partido que nasceu combatendo as velhas práticas da política conservadora no nosso país, nos estados e nos municípios brasileiros

Efeito nernst anômalo em Materiais com anisotropia magnetocristalina (110)

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Anisotropia magnética (110) em Nanofilmes de Permalloy sobre MgO(100)

The study and fabrication of nanostructured systems composed of magnetic materials has been an area of great scientific and technological interest. Soft magnetic materials, in particular, have had great importance in the development of magnetic devices. Among such materials we highlight the use of alloys of Ni and Fe, known as Permalloy. We present measurement results of structural characterization and magnetic films in Permalloy (Ni81Fe19), known to be a material with high magnetic permeability, low coercivity and small magneto- crystalline anisotropy, deposited on MgO (100) substrates. The Magnetron Sputtering technique was used to obtain the samples with thicknesses varying between 9 150 nm. The techniques of X- ray Diffraction at high and low angle were employed to confirm the crystallographic orientation and thickness of the films. In order to investigate the magnetic properties of the films the techniques of Vibrant Sample Magnetometry (VSM), Ferromagnetic Resonance (FMR) and Magnetoimpedance were used. The magnetization curves revealed the presence of anisotropy for the films of Py/MgO (100), where it was found that there are three distinct axis - an easy-axis for θH = 0°, a hard-axis for θH = 45° and an intermediate for θH = 90°. The results of the FMR and Magnetoimpedance techniques confirm that there are three distinct axes, that is, there is a type C2 symmetry. Then we propose, for these results, the interpretation of the magnetic anisotropy of Py/MgO ( 100 ) is of type simple C2, ie a cubic magnetic anisotropy type ( 110 )

Degradação eletroquímica de benzeno, tolueno e xileno via oxidação eletroquímica utilizando eletrodo Ti/Pt

This work is directed to the treatment of organic compounds present in produced water from oil using electrochemical technology. The water produced is a residue of the petroleum industry are difficult to treat , since this corresponds to 98 % effluent from the effluent generated in the exploration of oil and contains various compounds such as volatile hydrocarbons (benzene, toluene, ethylbenzene and xylene), polycyclic aromatic hydrocarbons (PAHs), phenols, carboxylic acids and inorganic compounds. There are several types of treatment methodologies that residue being studied, among which are the biological processes, advanced oxidation processes (AOPs), such as electrochemical treatments electrooxidation, electrocoagulation, electrocoagulation and eletroredution. The electrochemical method is a method of little environmental impact because instead of chemical reagents uses electron through reactions of oxide-reducing transforms toxic substances into substances with less environmental impact. Thus, this paper aims to study the electrochemical behavior and elimination of the BTX (benzene, toluene and xylene) using electrode of Ti/Pt. For the experiment an electrochemical batch system consists of a continuous source, anode Ti/Pt was used, applying three densities of current (1 mA/cm2, 2,5 mA/cm2 and 5 mA/cm2). The synthetic wastewater was prepared by a solution of benzene, toluene and xylene with a concentration of 5 ppm, to evaluate the electrochemical behavior by cyclic voltammetry and polarization curves, even before assessing the removal of these compounds in solution by electrochemical oxidation. The behavior of each of the compounds was evaluated by the use of electrochemical techniques indicate that each of the compounds when evaluated by cyclic voltammetry showed partial oxidation behavior via adsorption to the surface of the Ti/Pt electrode. The adsorption of each of the present compounds depends on the solution concentration but there is the strong adsorption of xylene. However, the removal was confirmed by UV-Vis, and analysis of total organic carbon (TOC), which showed a percentage of partial oxidation (19,8 % - 99,1 % TOC removed), confirming the electrochemical behavior already observed in voltammetry and cyclic polarization curves