Últimos itens adicionados do Acervo: Universidade Tecnológica Federal do Paraná

A Universidade Tecnológica Federal do Paraná (UTFPR) é uma universidade pública mantida pelo governo federal e sua sede esta localizada na cidade de Curitiba, capital do estado brasileiro do Paraná.

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‣ Desenvolvimento e caracterização de tofu defumado

Daniels, Juliano
Fonte: Londrina Publicador: Londrina
Tipo: Dissertação de Mestrado
Português
Soy products such as tofu, are typically oriental, but despite their functional and nutritional properties, these foods are not consumed in the Brazilian diet, due to the characteristic odor and flavor. A possibility to change these attributes of tofu is the implementation of smoking, which was formerly used only as a method of preservation, but today is used to modify the sensory characteristics. The objective of this work was to develop and characterize smoked tofu. Soy beans were blanched, macerated, crushed and centrifuged to obtain soy extracts that were coagulated and pressed, thus obtaining the standard tofus, thereafter they were smoked at 42ºc, to obtain the smoked tofus. It was determined the amount of water absorbed in maceration of the grains, yield and proximal composition of soy extracts. The tofus were assessed in yield, proximal composition, color and sensory acceptance. When making tofu with soy BRS 232 and BRS 284 and coagulants CaSO4 and MgCl2 it was observed that soybean varieties and coagulators showed no influence in all parameters evaluated, only the coagulation time was greater when not homogenized in the mixture using CaSO4. There was no difference in levels of moisture, ash and protein in extracts of two soybean varieties used. In these smoked tofus the smoking process caused reduction in moisture content of 5.5% on average and dimming of these products...

‣ Classificação de genótipos de café arábica usando espectroscopia de infravermelho próximo

Marquetti, Izabele
Fonte: Campo Mourao; Medianeira Publicador: Campo Mourao; Medianeira
Tipo: Dissertação de Mestrado
Português
The environmental conditions in coffee cultivation, such as climate, soil type and altitude, associated with agronomic practices, are responsible for influence the final chemical composition of the bean. They directly influence the essential features of the beverage, increasing its aggregate price. Proof of geographic and genotypic origin of the coffee genotypes must be done using reliable methods. Thus, the near infrared spectroscopy (NIRS), in the 1100 to 2498nm range, was used for analyze different coffee genotypes that were cultivated in different cities (Brazil - Paraná State). As first approach linear methods, principal components analysis (PCA) and partial least squares with discriminant analysis (PLS-DA), were used for data interpretation due to the high complexity and amount of information contained in the spectra. The obtained PLS-DA models had an average sensitivity of 93.75% and a specificity of 100% for the geographical classification. While for genopyte classification, the PLS-DA performance was 93.75% for sensitivity and 97.13% for specificity. In an attempt to improve the performance and reliability of the developed classifiers, both the PCA scores and the PLS-DA latent variables were fed into two artificial neural networks...

‣ Estudo preliminar para produção de vinagre de farelo de arroz desengordurado por processo submerso

Siepmann, Francieli Begnini
Fonte: Campo Mourao; Medianeira Publicador: Campo Mourao; Medianeira
Tipo: Dissertação de Mestrado
Português
According to estimates of the National Supply Company (CONAB), in the period March 2013/14, Brazil produced approximately 12.8 million tons of rice, an increase of 8 % compared to the period of 2012/13. The grain processing results in by-products such as rice bran, which has B vitamins, proteins, tocopherols and over 40% carbohydrates, justifying their use in fermentation processes such as vinegar production. Vinegar is composed of 80% (v/v) water and 20% of a wide variety of other compounds such as organic acids, alcohols, minerals, polyphenols, amino acids, among others. The substrates used in vinegar production must provide fermentable carbohydrates to alcoholic fermentation, which is followed by acetic fermentation. The aims of this study were to investigate the hydrolysis process of defatted rice bran by enzymatic way, assess the stage of alcoholic fermentation to optimize ethanol production, and carry out production of vinegar by submerged fermentation and characterizing the final product. METHODS: Optimization of enzymatic hydrolysis was achieved using a sequential strategy of experimental design. Firstly, a Fractional Factorial Fesign including 25-1 trials plus 3 center points (19 runs) was applied to evaluate the effects of concentration of amylolytic enzymes...

‣ Investigação do uso do processo fenton no tratamento terciário de efluente agroindustrial e na degradação do antibiótico norfloxacina

Almeida, Fernanda Salbego Colombari de
Fonte: Campo Mourao; Medianeira Publicador: Campo Mourao; Medianeira
Tipo: Dissertação de Mestrado
Português
There is a growing presence of persistent compounds, such as pharmaceuticals, personal care products, pesticides, cleaning products, and petroleum in industrial wastewaters to be toxic cause a lot of damage to the environment, when improperly discarded without undergo a treatment that makes them biodegradable. As a result, is increase of contamination of groundwater and surface water, sewage treatment plants and industrial wastewater . Because of this, new technologies capable of degrading this class of compounds, such as advanced oxidation processes, are being investigated, since the treatments most commonly used by industries, biological, are unable to degrade persistent compounds. Thus, the present study aimed to investigate the effectiveness of applying an advanced oxidation process (Fenton) in the tertiary treatment of wasterwaters from a swine slaughterhouse, and the degradation of the antibiotic norfloxacin (NFX). In a first step, the agro-industrial wasterwater and wherein the operating parameters of the process Fenton reaction pH, ratio [H2O2]/[COD] (w / w) ratio [Fe + 2]/[H2O2] (w/w) pH and coagulation were investigated depending on the removal efficiency of organic matter, through the evaluation of chemical oxygen demand (COD). In a first step the parameters were investigated by means of tests defined in 24-1 fractional factorial design with three replications at the center point and...

‣ Oxidation of cassava starch with ozone and hydrogen peroxide: effect on some functional properties

Menegol, Tania
Fonte: Campo Mourao; Medianeira Publicador: Campo Mourao; Medianeira
Tipo: Dissertação de Mestrado
Português
INTRODUÇÃO E OBJETIVOS: Os amidos oxidados são obtidos através do tratamento de suspensões de amidos com um agente oxidante, que transformam seus grupos hidroxilas em grupos carbonilas e carboxilas, conferindo-lhes propriedades de interesse na área de industrialização de alimentos, tais como sabor neutro, aderência a superfícies, baixa viscosidade de pasta, géis transparentes e baixa tendência a retrogradar. Diferentes tratamentos oxidantes têm sido aplicados para a obtenção de amido de mandioca com propriedade de expansão. No presente estudo discute-se a modificação ocorrida no amido de mandioca submetido ao par ozônio/peróxido de hidrogênio e o efeito da oxidação nas propriedades funcionais e de expansão do amido modificado, com o objetivo de obter através desse tratamento, amidos isentos de resíduos metálicos e com propriedade de expansão, claridade de pasta e baixa viscosidade, de interesse em aplicações alimentícias específicas. MÉTODOS: Para estudar o efeito das variáveis independentes, dosagem de ozônio (1, 3 e 5g) e teor de peróxido de hidrogênio (0,25, 0,5 e 0,75%) sobre propriedade de pasta, claridade de pasta, teor de amilose, volume específico dos biscoitos, somatório de carbonila e carboxila...

‣ A história das invenções contada por Monteiro Lobato: um olhar sobre o progresso, trabalho e tecnologia

Tszesnioski, Roberta Reis Bahia
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
The present dissertation aims to analyze the representations of the worker,work, technology and progress in child labor ―História das Invenções‖, of Monteiro Lobato, published in 1935. It is considered that the representations of technology, progress and work, present in the work, demonstrate the process of recontextualization, directed by Monteiro Lobato, by adapting the work of Hendrik van Loon, to the Brazilian context, which is marked by new political, economic and ideological tensions. To this end, it is necessary to verify that the perspective of progress is included in the work, since, for the Brazilian writer, progress is associated with some types of inventions, which impacted the world of work. Two progress concepts are presented in the narrative: at first the evolutionary process by which the human being passed, idea strongly related to evolutionary theories. In a second moment, the author shows the progress as a tool of modernization, being closely related to inventions. The inventions considered as a technological apparatus, are extensions of human bodies. Also discusses the approach of Monteiro Lobato on the use of the machinery and its relationship with the employee. It will be seen that, for the Brazilian writer...

‣ A integração da tecnologia nos cursos de licenciatura em Letras do estado do Paraná a partir da perspectiva dos professores: um estudo de métodos mistos

Martins, Claudia Beatriz Monte Jorge
Fonte: Curitiba Publicador: Curitiba
Tipo: Tese de Doutorado
Português
The objective of this study was to analyze the integration of technology, or rather CALL – Computer Assisted Language Learning – in the classroom of Modern Languages courses in the state of Paraná. The Diffusion of Innovations Theory and the Spherical Model of L2 Teachers’ Integration of CALL Technology into the Classroom were the theoretical and analytical models that respectively guided the research. This is a mixed methods study that adopted a sequential explanatory design that consisted of two distinct phases: a first phase with a quantitative approach and a second phase with a qualitative approach. The final inferences were made from the results of both phases of the study. Analytically, the use of technology in the classroom was not considered a unitary construct, but rather multifaceted. Contextually, different higher educational institutions, not just one or two universities were investigated. The purpose was to avoid methodological, analytical and contextual constraints commonly found in studies on the integration of CALL. For the first quantitative phase a questionnaire was developed to collect data. The instrument was validated by a panel of experts, tested in a pilot study and, finally, applied to a sample of 152 teachers from 33 Modern Languages courses from public and private institutions throughout the state of Paraná. Statistical analyzes were performed to examine the relationship between the three sets of factors from the Spherical Model and the multifaceted uses of technology by the teachers of undergraduate language courses in the state of Paraná. The results identified four different uses and also the influences of individual factors...

‣ Avaliação experimental do desgaste de canto durante o processo de eletroerosão do AISI H13

Campos, José Alexandre de
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
The manufacture of molds and dies are rich in detail and complex geometries, requiring more innovative and precise technologes. One of the processes that stands out in the manufacture of molds and dies, is to EDM by penetration (Electrical Discharge Machining - EDM). The cutting by electrical discharge is classified as a non-defined geometry manufacturing process where material removal is carried out by repeated electrical discharge between two electrodes electrically conductive. The tool wear is a major measurement parameters in machining performance by EDM. The biggest problem caused by the electrode corner wear is the tool geometry change during the machining by changing the geometric tolerance and dimensional cavity. This paper proposes dimensional evaluation of the electrode corner wear, during the machining of the EDM process, varying the front surface of the electrode angle. Another purpose is to create an index, called rounding rate, which takes into account the areas of electrode corner wear due to the removed area of the workpiece material. The results showed that the copper electrode, copper tungsten and graphite, has a large corner radius growth at the beginning of machining, stabilizing these values with higher process time. The front surface of the electrode angle influence directly on the electrode corner wear. Graphite electrodes showed no corner wear rounding behavior during the tests. For rounding rate index tungsten copper electrodes had the lowest value presented in the machining of AISI H13.; A fabricação de moldes e matrizes são ricas em detalhes e geometrias complexas...

‣ Estudo, desenvolvimento e implementação de algoritmos de aprendizagem de máquina, em software e hardware, para detecção de intrusão de rede: uma análise de eficiência energética

França, André Luiz Pereira de
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
The increasing network speeds, number of attacks, and need for energy efficiency are pushing software-based network security to its limits. A common kind of threat is probing attacks, in which an attacker tries to find vulnerabilities by sending a series of probe packets to a target machine. This work presents the study, development, and implementation of a network packets feature extraction algorithm in hardware and three machine learning classifiers (Decision Tree, Naive Bayes, and k-nearest neighbors), in software and hardware, for the detection of probing attacks. The work also presents detailed results of classification accuracy, throughput, and energy consumption for each implementation.; CAPES; CNPq; O constante aumento na velocidade da rede, o número de ataques e a necessidade de eficiência energética estão fazendo com que a segurança de rede baseada em software chegue ao seu limite. Um tipo comum de ameaça são os ataques do tipo probing, nos quais um atacante procura vulnerabilidades a partir do envio de pacotes de sondagem a uma máquina-alvo. Este trabalho apresenta o estudo, o desenvolvimento e a implementação de um algoritmo de extração de características dos pacotes da rede em hardware e de três classificadores de aprendizagem de máquina (Árvore de Decisão...

‣ Desenvolvimento de senso crítico, analítico e científico em alunos participantes de clube de ciências

Grein, Adriane Cristina Veigantes
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Acompanha: Sugestão de roteiro de atividades para o clube de ciências; The participation of students in Science Clubs, is an opportunity to develop their curiosity and Science spirit. To the teacher is a possibility to develop several projects and themes, which inflexible curricula sometimes would not allow. This work presents a study of the critical, analytic and scientific development of the students from final grades of Elementary School from Olavo Bilac School in Cantagalo – PR, for their participation in a Science Club. This club is in the mentioned school, and attends the Program of Complementary Course in After School Activities, of the State Department of Education. The research conducted at the Science Club, have used several activities, such as group work, video presentations, conduction of experiments and the use of world wide web. In the dissertation of this work, it has presented what a Science Club is and means, and which is its role, and importance to the teaching of subjects, taking into account the Theory of Meaningful Learning. In addition, it is conducted an approach about interdisciplinary and the importance of experimentation. The theme chosen for study was Material Analysis in a sustainable perspective. The materials analyzed were paper...

‣ Uso e divulgação do software livre Tracker em aulas de física do ensino médio

Oliveira, Fábio Anastácio de
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Inclui: Manual para usuários iniciantes no software Tracker, p. 113.; This work relates to videoanalysis as a learning tool in high school Physics classes. It presents results on the use of free software Tracker, which aims at motion video frame by frame measurement and analysis. Our main goal is to provide alternatives to the lack of physics teaching laboratories, which is a major problem faced by many Brazilian schools. Videoanalysis is a powerful tool made possible by common digital cameras, including the ones present in mobile phones. Videos are recorded allowing for data collection and analysis with Tracker together with any usual spreadsheet software. The project was applied to students attending the first year of a public high school in Curitiba. The school is located in a region characterized by poverty and social risk. The obtained results were assessed by a report consisting of six questions, related to the subject freefall, proposed to the students. The developed material offered students a different learning perspective, aiming at improving students’ motivation towards learning Physics. The lectures were also an efficient way of stimulating critical thinking together with inclusive use of technology in the school environment.; O presente trabalho apresenta uma aplicação em sala de aula do software livre Tracker...

‣ Enterococcus isolados de alimentos: caracterização molecular e perfil de resistência a antimicrobianos

Giraldi, Cátia
Fonte: Campo Mourao; Medianeira Publicador: Campo Mourao; Medianeira
Tipo: Dissertação de Mestrado
Português
Enterococci are pathogens with considerable ability to express resistance to multiple antimicrobials and abundant representation in foods. This study aimed to carry out the isolation of strains of the genus Enterococcus in food, represented by chicken and pork (raw and processed), to analyze the profile of antimicrobial resistance by the disk diffusion method and by molecular techniques to identify species isolates and genes encoding resistance to vancomycin and tetracycline. 36 samples, totaling 54 strains belonging to the genus Enterococcus were analyzed. The species detected in most occurred in isolates from raw chicken meat (40 %) and raw pork (29%) was isolated in E. faecalis and processed meat products (100%) E. faecium. E. casseliflavus / E. flavencens had its isolation only in the processed product. The species E. gallinarum was confirmed between food samples surveyed. E. faecalis and E. faecium isolates from raw chicken meat isolated were significantly more resistant than the other samples, showing high percentage of resistance to: streptomycin, ciprofloxacin, norfloxacin, erythromycin, vancomycin and tetracycline. The isolated raw poultry and swine gene showed resistance to tetracycline and vancomycin. Therefore, it is suggested that food of animal origin may play an important role in the dissemination and transfer resistant enterococci and / or resistance genes to humans.; Os enterococos são patógenos com considerável capacidade de expressar resistência a vários antimicrobianos e com abundante representatividade em alimentos. Este estudo teve por finalidade realizar o isolamento de cepas do gênero Enterococcus em alimentos...

‣ Avaliação de técnicas de microencapsulação de lactobacillus acidophilus empregando proteínas do leite acompanhada de maltodextrina como agentes encapsulantes

Corti, Daiane
Fonte: Campo Mourao; Medianeira Publicador: Campo Mourao; Medianeira
Tipo: Dissertação de Mestrado
Português
A dissertação é composta por 5 artigos; Consumidores modernos estão cada vez mais preocupados com a saúde e almejam o consumo de alimentos saudáveis ou capazes de prevenir doenças. Neste contexto, destacam-se os alimentos funcionais, que além de fornecerem a nutrição básica, possuem potencial para promover a saúde através de mecanismos não previstos pela nutrição convencional. Surgem então, os probióticos que podem ser definidos como micro-organismos vivos, que administrados em quantidade adequada, conferem benefícios à saúde do hospedeiro. Porém, devido à instabilidade dos mesmos, a prática de microencapsulação vem sendo pesquisada para manterá estabilidade desses micro-organismos durante o processamento e estocagem dos alimentos. Levando-se em consideração que a microencapsulação é uma técnica viável para aumentar a estabilidades dos probióticos e que a eficácia é dependente, também, do método e do material de encapsulação empregado, o objetivo do trabalho foiestudar o processo de microencapsulação do micro-organismo probiótico Lactobacillus acidophilus empregando proteínas do leite e maltodextrina como agentes encapsulantes, através das técnicas de gelificação enzimática e atomização.; 2016-10-31

‣ Uso de modelo digital de elevação gerados a partir do ASTER GDEM e SRTM para caracterização de rede de drenagem

Tomazoni, Julio Caetano; Guimarães, Elisete; Gomes, Tayoná Cristina; Silva, Taisller Guimarães da
Fonte: Revista Brasileira de Geografia Física; Francisco Beltrao Publicador: Revista Brasileira de Geografia Física; Francisco Beltrao
Tipo: Artigo de Revista Científica
Português
This paper assesses the suitability of using digital elevation models, resulting from manipulation of altimetric mission SRTM and ASTER instrument, to update maps of the drainage network in the municipality of Renaissance PR. To characterize the drainage network from SRTM and ASTER data used the software SPRING 5.1.7. The hydrographic network, obtained by these two methods was crossed with a mesh extracted from hydrographic maps of the army and orthorectified images of the SPOT 5 satellite. The results show that the drainage system, derived from SRTM and ASTER data is not satisfactory because they do not determine the vast majority of streams of first and second orders. Already the third, fourth and fifth orders, which are identified in the vast majority are located outside the actual course of the letters found by the army and orthorectified images. The data show that the riparian vegetation are acquired by SRTM and ASTER and interfere with the variations in altitude and therefore the bad design of drainage networks.; Este trabalho avalia a adequação do uso de modelos digitais de elevação, provenientes da manipulação de dados altimétricos da missão SRTM e do instrumento imageador ASTER, para atualização de mapas da rede de drenagem do município de Renascença PR. Para caracterização da rede de drenagem a partir de dados SRTM e ASTER utilizou-se o software SPRING 5.1.7. A rede hidrográfica...

‣ Simulador de alta velocidade em FPGA de circuitos LUT de lógica combinacional de topologia arbitrária para algoritmos evolucionários

Cabrita, Daniel Mealha
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
This work presents an architecture for simulation of combinational logic circuits of arbitrary topology, meant to be interfaced with evolutionary algorithms for hardware generation. It was implemented in FPGA using the VRC technique. The simulator allows for circuits composed of LUTs of parametrizable number of imputs. The free interconectivity between LUTs allows the construction of cyclic circuits. The architecture is modular and of simple interfacing. High performance is obtained by the use of multiple simulation modules in parallel, bringing results that surpass the ones obtained from other works based on DPR.; Este trabalho apresenta uma arquitetura para simulação de circuitos de lógica com binacional de topologia arbitrária, visando interfaceamento com algoritmos evolutivos para fins de geração de hardware. A implementação é em FPGA utilizando a técnica VRC. O simulador permite circuitos compostos por LUTs de número de entradas parametrizável. A livre interconectividade entre as LUTs permite a construção de circuitos cíclicos. A arquitetura é modular e de interfaceamento simples. Alta performance é obtida através do uso de múltiplos módulos de simulação em paralelo, trazendo resultados que ultrapassam os obtidos em outros trabalhos utilizando DPR.

‣ Avaliação da geração de resíduos em disciplinas de química orgânica e inorgânica e propostas de redução

Barbosa, Ricardo
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
The Academic Department of Chemistry and Biology of UTFPR- Campus Curitiba today has 30 laboratories dedicated to teaching and research activities. Currently, waste generated by these laboratories are collected and proceed to final disposal. In this study, we conducted a survey of the current situation of the generation of laboratory chemical waste in the Department. Initially teaching laboratories were selected for execution of work for meeting more students and their frequent activity, were identified that met more students and where they were executed more practical classes. Studied the characteristics of the waste generated in these classes, based on the teaching plans, monitoring of some subjects during the execution of experiments and records the warehouse. There was the possibility of experimental changes, preventing the generation of waste, as set out the principles of green chemistry. Thus, the disciplines of Inorganic and Organic Chemistry were considered with good opportunities for intervention. The experimental manuals of these subjects were studied, and the inventory of the waste generated by them showed the generation of hazardous waste according to NBR 10004 of ABNT. We developed five new routes of practical classes and methodological changes proposed involved the replacement of reagents that could give rise to hazardous waste containing barium...

‣ Cartografia: uma introdução aos conceitos de geometria não euclidiana na educação básica

Mülhbauer, Marlon
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
This project propose the introduction to non Euclidean geometries, especially Spherical Geometry in high school for second graders in order to improve the processes of teaching and learning that discipline. Includes a brief history of geometry, with names like Euclides, Bolyai, Lobachevsky and Riemann, and its importance to the improvement of this content. Furthermore, cartography topics were explained to level the knowledge and can achieve an important result: the determination of the distance between two points on the surface of a sphere. The activities implemented for students appearing in the appendix, after all the explanation of the classes and worked contents.; Esse trabalho tem como objetivo propor a introdução a Geometrais não Euclidianas, principalmente Geometria Esférica, no Ensino Médio, para alunos da segunda série, a fim de melhorar os processos de ensino e aprendizagem dessa disciplina. Conta com um breve histórico de geometria, com nomes como Euclides, Bolyai, Lobachevsky e Riemann, e a importância desses pensadores para o aperfeiçoamento deste conteúdo. Além disso, tópicos de cartografia foram explicitados, para nivelar os conhecimentos e conseguimos alcançar um resultado importante: a determinação da distância entre dois pontos da superfície de uma esfera. As atividades aplicadas para os alunos aparecem no apêndice...

‣ Pagamento por serviços ambientais para conservação de áreas protegidas particulares

Silveira, Gilberto Borges da
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Environmental Service Payment (Pagamento por Serviço Ambiental - PSA) is addressed to meet the need of conciliating rural property economic interests and environment conservation, according to the new environment laws. Since Law n. 4771/1965 established the Forestry Code, Brazil uses the natural resources’ Legal Reserves and Permanent Preservation Areas (Área de Preservação Permanente- APP) as mechanisms to help maintaining private protected areas preserved. As provided in the Brazilian Constitution of 1988, rural property exploration is subjected to socio-environmental liabilities in order to assure the preservation of natural resources and maintain ideal environmental conditions in behalf of the society interests. The Environmental Service Payment, in force both at Federal and State levels, seeks the conciliation between the producer private interest and the environment quality social interests. Law n. 12651/2012, which changed the Forestry Code, provides economic tools addressed to encourage rural property owners to maintain protected areas within their private properties through increasing the natural resources value. In the State of Paraná, Law n. 17134/2012 established the Environmental Service Payment. The aforementioned laws need rules...

‣ Aplicação da Moringa oleifera na remoção de células de Microcystis aeruginosa e metabólitos por flotação por ar dissolvido e filtração rápida

Carvalho, Maiara Soares de
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Nutrient inputs leads to more frequent algal blooms in water supply reservoir which causes operational problems in water treatment plants due to high density of cells, aside from complications induced by its capacity of production of cyanotoxins and taste and odour compounds. The present study had as purpose an evaluation of the applicability of Moringa oleifera Lam as a coagulant with and without polyaluminium chloride (PACl) in the removal of Microcystis aeruginosa cells, microcystins, 2-MIB and geosmin using dissolved air flotation and filtration, using granulated activated carbon (GAC). First, NaCl and CaCl2 salts were studied for extraction of the coagulant. Samples were obtained by the addition of humic acid and M. aeruginosa cells in synthetic water in order to obtain 25 NTU. Coagulant obtained with 1M CaCl2 showed a better performance for color, turbidity and cells removal, being indicated 50 mg L-1 dosage. CaCl2 would not extract better the active component of M. oleifera seeds, but participate on flocs formation. Based on this, PACl addition was evaluated and added in the ranges of 10 to 50% substitution of the saline coagulant. 70:30 and 60:40 proportions of M.oleifera:PACl were indicated in order to to remove turbidity...

‣ Desenvolvimento de sensores planares em tecnologia de circuitos impressos para detecção de umidade em madeiras e presença de água em dutos hidráulicos

Reis, Diego Dias dos
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
In this work it was used the conventional manufacturing technology for printed circuits, which presents advantages of being low cost, known technology, for developing two basic types of planar sensors. The first one operates by capacitive measurements of variation of permittivity of medium and a second type of passive, wireless, resonant (PWR) which changes the resonant frequency as a function of permittivity or permeability. Furthermore, two types of sensors are described from the point of view of mathematical analysis, simulations, and measurements. Tests were performed to detect the presence of water in hydraulic ducts and moisture of wood samples. The results indicate that evaluated sensors serve the purpose and can be used for their specific applications.; CNPq; Capes; Neste trabalho é utilizado a tecnologia convencional de fabricação de circuitos impressos, que possuem vantagens de ser de baixo custo, facilidade de produção, tecnologia conhecida e divulgada, para se desenvolver dois tipos básicos de sensores planares. O primeiro um capacitivo que opera pela detecção da variação da permissividade do meio e um segundo do tipo passivo, wireless e ressonante (PWR) que varia a frequência ressonante em função da permissividade ou permeabilidade do meio. Além disso...