Estudo sobre o funcionamento de sistema de controle de tração em veículos automotores

This study explores the subject of traction control systems through bibliografy review on the spot of Mechanical Engineering. This paper has the objetivo of high light the main components and tecnology involved since MaxTrac system in 1971. It describes systems controled by throttle valve and breaks. Additionally, it i also presented basic knowlodged regarding electronic control unit and wheel sensors

Aplicação de adesivos estruturais em painéis de carros

The automobile industry is increasingly interested in reducing vehicle weight for greater speed, lower fuel consumption and emissions, through innovation of materials and processes. One way to do this is to seek the replacement of conventional processes by the use of structural adhesives. Structural adhesives are highly resistant materials, which can replace rivets, bolts and welds allowing the substrate / adhesive assemble is stronger than the substrate itself. One of the major advantages of gluing with respect to welding is its esthetic appearance, since it does not leave marks. For this reason, parts to be soldered require a minimum thickness so that the marks do not appear, since the pieces from gluing have no restriction as to the thickness. By replacing the vibration welding process for gluing process of the instrument panel parts of an automobile, one obtains a reduction of the thickness of the parts and therefore it decreases the weight of the car. This work aims to study the various structural adhesives that already exist on the market to be applied on the instrument panel. The mechanical test performed to measure the maximum adhesive strength was the Lap Shear Test at 23°C (room temperature), -35°C and 85°C. The types of adhesives used were the hot-melt and the bi-component. By the results obtained, it is in favor using the bi-component for application to the union of instrument panel parts

Conhecimento e atitudes da área da saúde frente ao risco de contaminação por hepatites ao fazer as unhas

Pós-graduação em Saúde Coletiva - FMB

Aços avançados de alta resistência: avaliação da microestrutura e propriedades dos aços DP 600 E DP 780

This work aims to study the Dual-Phase 600 and 780 steels, which are part of technology development project materials for the automotive industry. It is worth underscoring the antagonistic properties as the Dual-Phase steel assemble, high mechanical strength and elongation due its microstructure, ferrite and martensite. These properties are obtained by a intercritical heat treatment which facilitates the formation of a hardness metastable microstructure shaped plates of low carbon steels. The applicability of Dual Phase steel in the structure of vehicles is huge and its production is already on a commercial scale, so the study and development of this material implies lower cost in automobile manufacturing processes. The dual phase steels DP600 and DP780 underwent tensile, hardness and metallographic analysis to evaluate and comparing its properties. The results indicate that the DP780 steel has higher strength and hardness than the DP600 steel and its microstructure consists of martensite higher fraction which accounts for the higher resistance and hardness. However, the DP600 has higher conformability to DP780 steel

Estudos de pré-formulação e desenvolvimento de cosméticos Dimora Del Sole

De acordo com dados de 2014 da Associação Brasileira da Indústria de Higiene pessoal, Perfumaria e Cosméticos (ABIHPEC) o setor de Higiene Pessoal, Perfumaria e Cosméticos (HPPC) apresentou durante os últimos 18 anos crescimento médio próximo a 10% ao ano e de acordo com dados do Euromonitor de 2013 o Brasil é o terceiro maior mercado mundial de HPPC. Diante deste cenário, este estudo objetivou o desenvolvimento de uma linha de cosméticos composta de preparações capilares, corporais e faciais, a partir do conhecimento das técnicas de formulação e dos materiais cosméticos escolhidos. A indústria de cosméticos é um ramo da indústria química, e suas atividades estão vinculadas ao desenvolvimento e produção de produtos de aplicação ao corpo humano para embelezamento, limpeza sem alterar funções ou estruturas (GARCIA et al., 2000). A linha de cosméticos Dimora Del Sole foi desenvolvida através de testes com diversas substâncias cosméticas e diferentes técnicas de preparo realizadas no laboratório de cosmetologia na Faculdade de Ciências Farmacêuticas - UNESP - Araraquara até que se obtivesse à formulação desejada. Esta linha teve como foco a diversidade brasileira com inspirações da Itália, buscando os diferenciais que permitam sua aceitação e consumo no mercado pelos clientes. Ainda, os produtos desta linha foram preparados considerando-se os aspectos legislativos com relação à confecção das embalagens e rotulagem e ações de marketing. Palavras-chave: cosméticos, formulação de produtos cosméticos, matérias-primas, desenvolvimento técnico, manipulação de produtos, expectativa do mercado, marketing do produto.

Validação de metodologia analítica para determinação de residual de detergente alcalino

O presente trabalho foi realizado nas dependências da FURP (Fundação para o Remédio Popular) de Américo Brasiliense - SP, com o objetivo de validar o método de determinação para residual de detergente alcalino nos equipamentos de revestimento de comprimidos. O trabalho foi desenvolvido no laboratório do Controle de Qualidade da FURP. A validação de limpeza é um tema pouco visto durante o curso de graduação em Farmácia - Bioquímica, porém bastante importante dentro da Indústria Farmacêutica. O processo de limpeza dos equipamentos utilizados na indústria farmacêutica deve ser validado para garantir a qualidade dos produtos. Determinar o residual de um produto de limpeza em um equipamento assegura que o agente de limpeza usado no processo, no caso o detergente alcalino, esteja em uma quantidade dentro do limite aceitável após a limpeza do equipamento. Primeiramente, validou-se o método analítico utilizado para determinar a quantidade de resíduo através da condutividade. Foram analisados os parâmetros linearidade, precisão e especificidade, que se encontraram dentro do limite permitido. Também foi realizado o estudo de recuperação (recovery) do resíduo de detergente do equipamento para confirmar a eficácia da técnica de amostragem juntamente com o método analítico quantitativo escolhido. Após a validação da metodologia analítica quantitativa e o estudo de recuperação foi possível definir um procedimento adequado para a análise do residual de detergente alcalino nos equipamentos submetidos ao processo de limpeza. Juntamente com o setor de Garantia da Qualidade, também foi realizado o estudo de validação da limpeza dos equipamentos da linha de sólidos da FURP (unidade Américo Brasiliense), neste estudo foi avaliado se o procedimento de limpeza estava sendo eficiente e também foi possível fazer a determinação de residual de detergente alcalino presente no equipamento após amostragem com swab, ...

Uma análise das estratégias de manufatura adotadas por seis montadoras da indústria automobilística mundial

The Brazilian automotive industry has undergone profound changes during the 90’s decade, as a consequence of the market opening up through the liberation of automobile imports. The exposure of the Brazilian domestic market to competition with imported products of high quality and lower prices indicated the need for significant changes in those auto industries operating in this country, with the intention of making them competitive. To achieve these objectives management and production concepts were adopted, such as: the just-in-time philosophy; lean manufacturing; outsourcing; reengineering and increasing the rate of automation in both production and management systems. These changes helped to increase productivity and, in turn, reduced the level of employment in the sector, especially in activities where the required qualification levels were low. Despite this modernization, the Brazilian companies have committed themselves to meet the specific needs of the Brazilian market. The objective of this paper is to analyze and present manufacturing strategies from six manufacturers of automotive vehicles: Toyota in Japan, Fiat in Italy, Volkswagen in Brazil and Germany and General Motors in the U.S. and Brazil. The predominant method of research was from reviewing relevant literature, whereas the empirical data was analyzed qualitatively. The article seeks to identify the manufacturing strategies adopted by manufacturers located in the above countries, electing one automotive manufacturer to represent each country. The research demonstrated that the processes for production of automobiles in four plants located in, the U.S. (GM); Italy (Fiat); Japan (Toyota) and Germany (VW) are similar to those adopted in Brazilian industrial plants of the same companies (GM and VW), with differences of operations only in the business strategies adopted by each of them.

Comparação entre soluções irrigadoras na endodontia: clorexidina x hipoclorito de sodio

The objective of this review was reporting an overview about the properties of two irrigating solutions, solution of sodium hypochlorite and chlorhexidine, used in the treatment of root canals. A solution must submit irrigating antimicrobial action, dissolve waste tissue, promote wetting to facilitate the instrumentation, and present biocompatibility with the adjacent tissues. The sodium hypochlorite used in different concentrations has been the solution of choice among professionals by presenting antimicrobial action and act as a solvent tissue. However, today, chlorhexidine has been widely used as an irrigating solution due to specific properties that enable its use, such as substantivity, antimicrobial effectiveness, and low toxicity. Thus the solution of chlorhexidine with different concentrations is presented as an alternative to irrigating solution for the treatment of root canals.

Aspectos atuais do tratamento da infecção endodôntica

Endodontics is a science that embodies etiology, diagnosis, prevention, and treatment of apical periodontitis and its repercussion in the organism. Technological resources in diagnosis and root canal negotiation, and new strategies , associated to mainly cleaning and eliminating the infection of the root canal system, shaping, and filling the endodontic space, according to biological bases, will allow us to reach higher standards of post-treatment success.

Influência da agulha irrigadora e da dilatação do canal radicular na eficácia da irrigação endodôntica

Introduction: The irrigation of root canals aims to their cleaning and disinfection, improving endodontic treatment success. Objective: To investigate the influence of the diameter and type of irrigation needle and the root canal enlargement on the mechanical efficacy of endodontic irrigation. Material and methods: Twelve human single-rooted mandibular incisors were used. During some instrumentation stages (enlargement by #20, #30, and #40 K file), root canals were filled with radiographic contrast solution mixed to propyleneglycol and zinc oxide. Needles with different diameters and designs were employed: G1 – 23G and lateral opening; G2 – 22G and apical opening; G3 – 30G and lateral opening; G4 – 30G and apical opening. The needles were inserted up to resistance, with 1 mm step-back to avoid root canal obliteration. The irrigation was performed with 2 mL of distilled water. Before and after irrigation/aspiration, teeth were radiographed at bucco-lingual and mesiodistal direction, using a digital radiographic system. Then, root canal areas, before (filled by contrast solution) and after irrigation (remnant of contrast solution), were submitted to image subtraction with Adobe Photoshop CS4 software. Subsequently, the areas were measured by Image Tool 3.0 software, allowing the obtaining of the cleaning percentage for each modality. Data were analysed by using Anova and Tukey’s test. The level of significance was set at P < 0.05. Results: For all root canal enlargements, 30G needles (G3 e G4) presented a better cleaning efficacy. In all groups, higher cleaning efficacy percentage was observed at #30 and #40 K file enlargement. Conclusion: Regardless their design, thinner needles were more effective; a better cleaning efficacy occurred in more enlarged root canals.

Conhecimento de mães sobre os procedimentos de emergência nos casos de avulsão dentária

Introduction: Despite tooth avulsion following trauma being relatively common in children, the available studies show that adults have limited knowledge about it. Aim: The purpose of this study was to assess, by a questionnaire, the mothers’ general knowledge about the immediate management of tooth avulsion. Material and method: This descriptive study was carried out on a convenient sample of mothers (n= 65) who participated of the “Pastoral da Criança”, from Araraquara, SP, Brazil. The questionnaire comprised 15 questions about personal data and knowledge on tooth avulsion management. Results: Participants were, on average, 35 years old. A total of 30.8% of the mothers reported that their children suffered dental trauma. The majority had never received advice on this subject (76.9%); and did not know how teeth are kept in the dental arch (69.2%). Almost a half of the sample believed that an avulsed tooth can be replanted (49.2%). In relation to the management of tooth avulsion, 40% of them would clean the avulsed tooth with water, even if it was not dirty (38.5%). Most of them (69.2%) would take the tooth by hand for cleaning purposes, regardless the tooth region; and believed that brushing the tooth was important to take the dirty out (67.7%). Conclusion: The general knowledge of mothers about the immediate management of tooth avulsion was considered inadequate endangering the successful treatment of tooth avulsion.

Radiographic evaluation of root canal cleaning, main and laterals, using different methods of final irrigation

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Análise comparativa dos métodos MQL, MQL/Água e convencional na retificação cilíndrica do aço ABNT 52100, com rebolo de óxido de alumínio

Pós-graduação em Engenharia Mecânica - FEB

Pesquisa de salmonella em mutuns (mitu mitu) mantidos em cativeiro

We collected 50 samples of curasow feces from the Scientific and Cultural Breeding Center in the city of Poços de Caldas. The samples were enriched in broth medium Tetrationato and Cystine-selenite and plated on Salmonella Shigella (SS), Mac Conkey (MC), endo-C (EC), Brilliant Green (VB) and Eosyn Methilen Blue EMB, remaining at 37 °C for 24h. Colonies suspected of Salmonella were inoculated in tubes containing Agar Triple Sugar Iron (TSI) and again incubated at 37 ºC for 24h. Tubes with characteristic growth were submitted to slide agglutination test with polyvalent somatic and flagellar serum. The medium SS, MC and VB were the most efficient for growing, and 36% of samples were positive for Salmonella spp. As birds are important reservoirs of Salmonella spp and it may represent a high risk to human health, there is a need to implement a cleaning routine in enclosures avoiding contamination between the enclosures and the consequent entrainment of these micro-organisms, by the keepers until their homes or other venues. The presence of Salmonella in breeding centers may be responsible for lower hatchability of eggs, undermining the purpose of the entity, which is to study and maintain the various birds species.

Responsabilidade socioambiental: conhecimento dos profissionais da saúde sobre o gerenciamento de resíduos no serviço público

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)