bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation and CO2 Sorption of a High Surface Area Activated Carbon Obtained from the KOH Activation of Finger Citron Residue
Authors: Dai Wei , Liu Yuchen , Su Wei , Hu Gengshen , Deng Gang , Hu Xin
Published: July 2012

A high surface area activated carbon was synthesized by potassium hydroxide (KOH) activation of Finger Citron residue. The pore structure of the as-synthesized activated carbon was characterized by nitrogen adsorption and its carbon dioxide (CO2) sorption capacities at different conditions were measured under high pressure. The BET surface area and total pore volume of the as-synthesized sample were 2887 m2/g and 1.23 cm3/g, respectively. The dry sample exhibited a CO2 adsorption capacity of 19.21 mmol/g at 276 K and 3.57 MPa. The CO2 adsorption uptake increased considerably when an amount of water was pre-adsorbed onto the sample, possibly as a result of the formation of CO2 hydrate in the pore spaces of the activated carbon. The maximum CO2 adsorption capacity of the wet sample was found to be 29.02 mmol/g at 273 K and 3.57 MPa. Overall, the results reported confirm that Finger Citron residue could prove a promising precursor for high surface area activated carbon and point to the potential application of activated carbon made from Finger Citron residue in carbon capture and storage.
Adsorption and Enrichment of Alkalids from Areca Nut by Means of Macroporous Resins
Authors: Ding Yan , Yang Xiao-Ming , Pan Guo-Bo , Ma Hai-Le , Liu Wei-Min
Published: July 2012

Resin adsorption as a means of separating and enriching areca alkalids from areca nut extracts was investigated. The adsorption/desorption properties of areca alkalids on six macroporous adsorption resins and a macroporous cation-exchange resin D151 were evaluated. The results showed that D151, AB-8 and XAD-7 resins presented a higher adsorption capacity, adsorption ratio and desorption ratio than the other resins studied. Equilibrium and kinetic adsorption data for areca alkalids onto these three resins were obtained. Such data were best fitted by the Langmuir isotherm model and the pseudo-first-order kinetic model. The thermodynamic and kinetic parameters showed that D151 resin possessed the greatest adsorption capacity and the highest adsorption rate of the three resins, with the adsorption of areca alkalids being spontaneous and endothermic.

To optimize the operating parameters for enriching areca alkalids, dynamic adsorption and desorption tests were undertaken employing a column packed with D151 resin. The optimum parameters for adsorption were an inlet areca alkalid concentration of 2.24 mg/mℓ, a feed volume of 7 BV and a flow rate of 6 BV/h; for desorption, the corresponding conditions were the use of ethanol as the elution solvent at a feed volume of 8 BV and a flow rate of 1.5 BV/h. After treatment for only one cycle with D151 resin, the content of areca alkalids in the product was increased from 8.28% to 81.78% with an overall recovery of 87.40%. Moreover, D151 resin exhibited excellent re-usability for at least three adsorption/desorption cycles. The results obtained showed that macroporous resin could provide a feasible means for the large-scale preparation of areca alkalids from areca nut extract.
Separation and Pre-Concentration of Cu(II) Ions by a Synthesized Ion-Imprinted Polymer
Authors: Faghihian H. , Adivi F. Ghanbari
Published: July 2012

A new ion-imprinted polymer (IIP) was prepared by the copolymerization of vinylpyridine as the monomer, ethylene glycol dimethacrylate as the cross-linker and benzoyl peroxide as the initiator in the presence of a Cu(II)–salen complex. The synthesized polymers were characterized by FT-IR, TGA and XRD techniques. To study the adsorption behaviour of the adsorbent, the Cu(II) ion which acts as the template in the salen-functionalized polymer was eluted with 0.1 M HNO3. The effect of different experimental conditions on the adsorption capacity was studied. At Cu(II) ion concentrations of 30 ppm and at a pH value of 6.2, an adsorption capacity of 26 mg/g was obtained. Such an adsorption capacity at low Cu(II) ion concentrations is very significant and much higher than that obtained for Zn(II), Ni(II) and Co(II) ions. The relative selectivity coefficient of IIP for Cu(II)/Zn(II), Cu(II)/Ni(II) and Cu(II)/Co(II) was calculated, when it was demonstrated that the polymer is highly selective towards Cu(II) ions. The method was also used for a real sample. The results showed that the new adsorbent can be used for the pre-concentration of Cu(II) ions at low concentration and in the presence of Zn(II), Ni(II) and Co(II) ions.
Use and Misuse of Sorption Kinetic Data: A Common Mistake That Should Be Avoided
Authors: Canzano Silvana , Iovino Pasquale , Leone Vincenzo , Salvestrini Stefano , Capasso Sante
Published: July 2012

Numerical simulation of sorption dynamics showed that the use of data recorded at (or very close to) equilibrium in the search for the kinetic equation that best describes the process frequently leads to incorrect conclusions. Notably, it has been demonstrated that the fit of the adsorption data at equilibrium (t/qt versus t) is a straight line irrespective of the sorption kinetics. In order to distinguish pseudo-first-order from pseudo-second-order sorption kinetics, the data near the equilibrium should be omitted from the least-squares fit and the result confirmed by a different method. A straightforward method based on Δ(qt/qe)/Δt versus 1 – qt/qe and versus (1 – qt/qe)2 plots is suggested. Some recent papers reporting incorrect sorption kinetic analyses are discussed.
Evaluation of Glass Beads Coated with Chitosan for the Adsorption of Copper(II) Ions from Aqueous Solution
Authors: Albarelli Juliana Q. , Luna Murilo T. , Vieira Rodrigo S. , Beppu Marisa M.
Published: July 2012

Chitosan, a natural polymer obtained from the de-acetylation of chitin, has been extensively studied in adsorption applications because its amino and hydroxyl groups can act as chelation sites. However, this material is rarely used as an adsorbent, mainly because of mechanical strength limitations. A possible means of making its use viable is the immobilization of chitosan onto solid matrices using particle-coating techniques. Studies have shown that the use of immobilized chitosan not only improves the mechanical strength of the adsorbent, but also enhances its mass-transfer properties. In this context, the present study has investigated the adsorption application of chitosan coated onto glass beads in batch and dynamic systems for the removal of copper ions from aqueous solution. The adsorption equilibrium properties were measured at different temperatures (25, 40, 50 and 60 oC) and the Langmuir, Freundlich and Langmuir–Freundlich models were used to fit the equilibrium data. Kinetic studies showed that adsorption equilibrium was attained after 10 h. The pseudo-first-order and pseudo-second-order kinetic models in both linear and non-linear forms together with the intra-particle diffusion model were used to fit the adsorption kinetics data. The best fit was obtained with the pseudo-second-order kinetic model, thereby suggesting that the limiting factor to mass transfer was chemical adsorption. The results indicate that chitosan immobilized onto glass beads demonstrate a good adsorption performance, with similar or even better results relative to other chitosan-based materials. Dynamic adsorption studies using the coated beads in a fixed bed system demonstrated the viability of their use for wastewater treatment.
Electrosorption-Enhanced Micro-Column Solid-Phase Extraction of Traces of Cresol Red in Water Using Electrodes of Stainless Steel Wire Coated with Non-Conductive Polymer
Authors: Wang Sui , Deng Ai-Ni , Wei Jing , Guo Zhen , Zhang Ning , Guo Zhi-Yong
Published: July 2012

A non-conductive polymer was used as an extraction matrix in electrosorption procedures. The monolithic porous polymer was prepared by the in situ stepwise polymerization of epoxy resin and diethylenetriamine as the curing agent and polyethylene glycol (PEG-1540) as the pore-forming reagent. The working electrode consisting of a metal wire coated with epoxy resin-based polymer was connected to a direct high-voltage power supply, employing a platinum wire as the counter-electrode. The aqueous solution of Cresol Red selected as a model target analyte was extracted by electrosorption-enhanced micro-column solid-phase extraction, and the concentration determined by UV–vis spectrophotometric methods. The experimental conditions, including the electric potential, the extraction and desorption time, the pH of the initial solution and ionic strength, were optimized. The results showed that the adsorption rate and capacity towards Cresol Red could be improved significantly by anodic polarization, while cathodic polarization had a smaller effect on the adsorption process. The kinetics of the process were determined as Lagergren first-order. The electrosorption isotherm was in good agreement with the Freundlich and linear equations. The equilibrium adsorption capacity was four-times higher at 300 V and 20 min, in comparison with the absence of an electric field.
Removal of Amitriptyline from Aqueous Media Using Activated Carbons
Authors: Nabais J.M. Valente , Ledesma B. , Laginhas C.
Published: July 2012

This paper reports the removal of amitriptyline, a widely used tricyclic anti-depressant, from aqueous solutions by six activated carbons produced from cork, coffee endocarp and eucalyptus pulp. The results of this study showed that samples from cork and eucalyptus pulp, activated at 800 °C, exhibited the highest adsorption capacity of 120 mg/g and 110 mg/g, respectively. Samples produced from coffee endocarp showed the lowest capacity. Amitriptyline adsorption was almost independent of the pH of the solution and occurred via three different mechanisms based on the dispersive and chemical interactions between amitriptyline molecules and the carbon surface.
Ethylene Adsorption on Acid-Treated Clay Minerals
Authors: Alver Burcu Erdoğan , Sakızcı Meryem
Published: July 2012

The adsorption of ethylene (C2H4) on five clay minerals (sepiolite, two kaolinites and two bentonites) and on forms treated with 1 M HCl solution (SH, K1H, K2H, B1H and B2H) was investigated. Adsorption isotherms for ethylene on all clay minerals were obtained at 4 °C and 20 °C up to 37 kPa. X-Ray diffraction (XRD), thermal analysis (TG/DTA) and N2 adsorption analysis were used for structural and thermal characterization. It was found that the extent to which ethylene gas was adsorbed by natural and acid-treated sepiolites (0.424–0.859 mmol/g) was higher than that exhibited by natural and acid-treated bentonites (0.068–0.144 mmol/g) and by kaolinites (0.014–0.061 mmol/g) at both temperatures. The uptake of ethylene on the acid-treated clays increased in the order K1H < K2H < B1H < B2H < SH.
Characterization of preptin-induced insulin secretion in pancreatic β-cells
Authors: Cheng Kai-Chun , Li Ying-Xiao , Asakawa Akihiro , Ushikai Miharu , Kato Ikuo , Sato Yuki , Cheng Juei-Tang , Inui Akio
Published: July 2012

We aimed to characterize the effects of preptin on insulin secretion at the single-cell level, as well as the mechanisms underlying these changes, with respect to regulation by intracellular Ca2+[Ca2+]imobilization. This study assessed the effect of preptin on insulin secretion and investigated the link between preptin and the phospholipase C (PLC)/protein kinase C (PKC) pathway at the cellular level using fura-2 pentakis(acetoxymethyl) ester-loaded insulin-producing cells (Min 6 cells). Our results demonstrate that preptin promotes insulin secretion in a concentration-dependent manner. Using a PLC inhibitor (chelerythrine) or a PKC inhibitor (U73122) resulted in a concentration-dependent decrease in insulin secretion. Also, preptin mixed with IGF2 receptor (IGF2R) antibodies suppressed insulin secretion in a dose-dependent manner, which indicates that activation of IGF2R is mediated probably because preptin is a type of proIGF2. In addition, preptin stimulated insulin secretion to a similar level as did glibenclamide. The activation of PKC/PLC by preptin stimulation is highly relevant to the potential mechanisms for increase in insulin secretion. Our results provide new insight into the insulin secretion of preptin, a secreted proIGF2-derived peptide that can induce greater efficacy of signal transduction resulting from PLC and PKC activation through the IGF2R.
Scattering, Diffraction, and Geometric Light Trapping in Thin Film Amorphous Silicon Solar Cells on Plastic Substrates
Authors: de Jong M.M. , Baggerman J. , van Rijn C.J.M. , Sonneveld P.J. , Swinkels G.L.A.M. , Holterman H.J. , Rath J.K. , Schropp R.E.I.
Published: July 2012

In this study we compare light trapping in hydrogenated amorphous silicon (a-Si:H) solar cells deposited directly onto polycarbonate (PC) at low temperature (< 130°C). To that end, we embossed PC substrates with 400 nm and 10 μm square based pyramids to induce light trapping based on diffraction and on geometric effects. As a comparison, we deposited a-Si:H cells on flat glass substrates and on Asahi U-type TCO glass. The cells on PC generate current densities comparable (slightly higher) than cells on Asahi TCO glass, but suffer from a slightly lower Voc, resulting in cells with an initial efficiency of 6.8% and 7.4% on sub-micron pyramid and micro-pyramid structured PC substrates respectively, compared to 7.6% for cells on Asahi. This shows great potential for a-Si:H cells deposited directly onto cheap plastics.
Detection of Lectins using Glyco-Functionalized Nanosensors
Authors: Chen Yanan , Vedala Harindra , Kotchey Gregg P. , Audfray Aymeric , Cecioni Samy , Imberty Anne , Vidal Sébastien , Star Alexander
Published: July 2012

We have used single-walled carbon nanotube field-effect transistor (SWNT-FET) and chemically converted graphene field-effect transistor (CCG-FET) devices to probe the interactions between carbohydrates and their recognition lectins. Porphyrin- and pyrene-based glycoconjugates were used as receptor molecules and the target lectins were two bacterial lectins that present different carbohydrate preference, namely PA-IL, PA-IIL from Pseudomonas aeruginosa and a plant lectin Concanavalin A. The specific binding between lectin and carbohydrate can be transduced to the change in FET device conductance. An initial study with SWNT-FET noncovalently functionalized with porphyrin-based glycoconjugates showed both good selectivity and sensitivity. To compare SWNT and CCG performance, pyrene- and porphyrin-based glycoconjugates were functionalized noncovalently on the surface of CCG-FET and SWNT-FET devices, which were then treated with non-specific and specific lectins. The responses were compared and rationalized using computer-aided models of carbon nanostructure/glycoconjugate interactions. Fluorescence microscopy, atomic force microscopy, UV-vis-NIR spectroscopy and Isothermal titration microcalorimetry (ITC) measurements were used to confirm the electrical results.
Adrenal ganglioneuroma
Authors: Tarantino Roberta Magalhães , Lacerda Adriano Machado de , Cunha Neto Silvio Henriques da , Violante Alice Helena Dutra , Vaisman Mário
Published: July 2012

Adrenal incidentalomas (AI) are unsuspected adrenal masses discovered during investigation of unrelated diseases, and are increasing in frequency. The majority of the AI is non-secretory adenomas, although it can also represent primary or metastatic malignant neoplasia. However, less frequent diseases should not be forgotten in the differential diagnosis. We describe a case of a young woman with an adrenal mass without clinical or laboratorial signs of hormonal hyperfunction. Diagnosis was performed after an episode of acute pyelonephritis in which the imaging study was carried out in order to exclude local complications. During the surgical procedure, the fish flesh aspect of the mass raised the suspicion of a neurogenic tumor, which was diagnosed in the histophatological analysis. The patient presented the most common manifestation of adrenal ganglioneuroma, an incidentaloma.
Diversidade e dinâmica populacional de ácaros em pomar cítrico
Authors: Silva Marcos Zatti da , Sato Mário Eidi , Oliveira Carlos Amadeu Leite de
Published: July 2012

As plantas de citros hospedam diversas espécies de ácaros que causam sérios prejuízos à produção e qualidade de frutos no Brasil. Esta pesquisa teve por objetivo estudar a diversidade de ácaros e a dinâmica populacional das principais espécies de ácaros em pomar de citros, Citrus sinensis (L.) Osbeck, localizado no município de Descalvado, Estado de São Paulo. Foram realizadas 14 avaliações em um período de 12 meses, de fevereiro de 2007 a fevereiro de 2008. Em cada avaliação, foram coletadas dez folhas e cinco frutos na parte interna de cada uma das 40 plantas demarcadas no pomar. Foram encontradas 34 espécies de ácaros, distribuídas em 17 famílias. As espécies mais abundantes foram: Phyllocoptruta oleivora (Ashmed) (Eriophyidae), Panonychus citri (McGregor) (Tetranychidae), Brevipalpus phoenicis (Geijskes) (Tenuipalpidae) e Fungitarsonemus sp. (Tarsonemidae). Entre os ácaros predadores, a família Phytoseiidae foi a de maior riqueza (oito espécies) e abundância (1.072 indivíduos). A espécie predominante foi Euseius concordis (Chant), correspondendo a 98,3% dos ácaros desta família. Foram observadas correlações significativas entre densidades populacionais de E. concordis e dos ácaros fitófagos P. citri, B. phoenicis e P. oleivora. Também foram observadas correlações significativas entre densidades populacionais desses ácaros e fatores meteorológicos como temperatura e precipitação pluvial. Os resultados indicam que E. concordis atua como inimigo natural de P. citri, B. phoenicis e P. oleivora no pomar cítrico estudado.
Os sem-voto do Legislativo brasileiro: quem são os senadores suplentes e quais os seus impactos sobre o processo legislativo
Authors: Neiva Pedro , Izumi Mauricio
Published: July 2012

Este artigo tem dois objetivos principais. O primeiro é elaborar um perfil dos suplentes de Senadores no Brasil em comparação com os Senadores titulares. O segundo objetivo é avaliar a sua atuação política, no intuito de identificar se exercem algum impacto sobre o funcionamento do Senado e sobre a sua relação com o Poder Executivo. Sugerimos que o fato de os suplentes não serem eleitos contribui para que eles sejam designados para tarefas "espinhosas" que poderiam gerar custos políticos para os Senadores titulares. Verificamos também que eles oferecem um apoio ligeiramente maior ao Poder Executivo, especialmente nas coalizões que contam com uma participação maior dos partidos de direita.
Orgulho e preconceito: a "objetividade" como mediadora entre o jornalismo e seu público
Authors: Biroli Flávia , Miguel Luis Felipe
Published: July 2012

O artigo discute o valor da "objetividade" na construção do discurso e na orientação das práticas jornalísticas. A análise de revistas brasileiras semanais de informação permite observar que o ideal da objetividade e a afirmação dos valores morais não são excludentes: "fatos objetivos" e julgamentos complementam-se na legitimação do jornalismo como guardião dos valores sociais. O compartilhamento de posições sociais - e preconceitos - entre os jornalistas e seu público permite que perspectivas e interesses específicos sejam vocalizados como se correspondessem à totalidade, naturalizando um padrão de valores e transmutando julgamentos em fatos. No jornalismo, a neutralidade corresponde à validação de discursos hegemônicos.
Financiamento eleitoral, representação política e gênero: uma análise das eleições de 2006
Authors: Sacchet Teresa , Speck Bruno Wilhelm
Published: July 2012

Este artigo compara a arrecadação de campanha de mulheres e homens candidatos aos cargos de deputados federal e estadual no pleito de 2006, no Brasil. Com base em análise de dados desagregados por sexo a partir do banco estatístico do Tribunal Superior Eleitoral foi considerado se mulheres e homens têm arrecadações distintas de financiamento de campanha, e em que medida este pode constituir-se em um fator explicativo para o baixo desempenho eleitoral delas. Os dados evidenciam que as mulheres têm arrecadações de campanha significativamente menores que a dos homens, e que dada a alta correlação existente entre financiamento e sucesso eleitoral, este pode ser um dos elementos centrais para explicar o seu baixo desempenho eleitoral.
Elecciones 2009 en Uruguay: permanencia de lealtades políticas y accountability electoral
Authors: Selios Lucía , Vairo Daniela
Published: July 2012

En este artículo se indagan las principales características asociadas al comportamiento electoral en las elecciones nacionales uruguayas en el año 2009. Através de la estimación de modelos probit en base a una encuesta electoral, se encuentra que la evaluación de la gestión del gobierno, la percepción de la economía y los aspectos ideológicos aparecen jugando fuertemente en esta elección caracterizada por la baja volatilidad. Estos hallazgos indican la existencia de fuertes lealtades a los partidos agrupados en familias ideológicas, combinadas con aspectos evaluativos sobre el desempeño económico y político, que pautan el voto de los uruguayos en esta elección.
Modelagem multicriterial aplicada a problemas de regulação em áreas portuárias privatizadas
Authors: Gartner Ivan Ricardo , Rocha Carlos Henrique , Granemann Sérgio Ronaldo
Published: July 2012

O objetivo deste trabalho é apresentar uma proposta de modelagem multicriterial aplicada a problemas de regulação em áreas portuárias privatizadas, tratando da hierarquização de áreas com fins de rateio de investimentos em questões de arrendamento. Os métodos multicriteriais de análise de decisão (MMAD) mostraram-se mais apropriados para a modelagem, pois o problema é de natureza multidisciplinar, envolve juízos de valor socioeconômico, ambiental e político e maior número de atores, apresenta muitos grupos de interesses com objetivos conflitantes e requer soluções de compromisso. A modelagem contou com a participação de técnicos e gerentes em regulação da Agência Nacional de Transportes Aquaviários (ANTAQ) e de pesquisadores especializados no tema. Na modelagem, foi considerada a conjugação do método de análise hierárquica (AHP) a procedimentos de normalização, resultando em um sistema de classificação de áreas portuárias segundo escalas de atratividade. A aplicação piloto considerou uma situação com cinco áreas hipotéticas a serem arrendadas e, ao término do processo, os técnicos em regulação podiam identificar instantaneamente a repercussão de suas escolhas na classificação final das áreas e na parcela correspondente do investimento para fins de arrendamento.
A influência da apresentação do preço sobre as avaliações dos clientes
Authors: Vieira Valter Afonso , Matos Celso Augusto de
Published: July 2012

O objetivo do trabalho foi investigar o efeito das distintas formas de apresentação do preço sobre as percepções dos clientes, tomando como base a intenção de compra, a comunicação boca a boca, o valor percebido, a confiança no anúncio e a percepção de preço caro. Com base nos trabalhos de Smith e Nagle (2005a, b) e Krishna, Briesch, Lehmann e Yuan (2002), os autores utilizam a teoria de valor agregado de preço para explicar a avaliação do cliente. Os achados do Estudo 1 mostraram que, quando o preço era apresentado na forma de Na concorrência R$ 2.299,00, aqui R$ 1.599,00 (versus a forma de controle com preço tradicional), o varejista obtinha melhores resultados em termos de intenção de compra dos participantes. Esse resultado foi salientado com produtos de alto envolvimento e com alto valor monetário, ou seja, valores acima de R$ 1.500,00. Os achados do Estudo 2 mostraram que o preço apresentado na forma somente neste final de semana teve melhores resultados para o varejista, aumentando significativamente a intenção de compra do cliente. O Estudo 3 mostrou que um desconto de 5% (versus nenhum, versus 10%, versus 15%) criou a maior intenção de compra. A contribuição da pesquisa está em suportar a tese de que a diferença na forma da apresentação de preço influencia positivamente na percepção do cliente, aumentando o valor percebido (confirmando Nagle, Hogan, & Zale 2011; Urbany, Bearden, & Weilbaker 1988) e rejeitando alguns estudos (Blech, 1981; Golden, 1979; Goodwin, & Etgar, 1980).
Políticas de gestão de pessoas, confiança e bem-estar: estudo em uma multinacional
Authors: Horta Priscila , Demo Gisela , Roure Patricia
Published: July 2012

Os principais autores da área de Gestão de Pessoas (GP), como Legge (2006) e Wilkinson, Bacon, Redman e Snell (2010), concordam que as pessoas assumiram papel estratégico e relevante nas organizações. Considerando que as políticas de GP precisam contribuir para um maior bem-estar e fortalecer a confiança dos colaboradores nas organizações (Mariotti & Souza, 2009; Nishii, Lepak, & Schneider, 2008; Turner, Huemann, & Keegan, 2008), esta pesquisa propôs-se a avaliar a relação existente entre essas variáveis segundo a percepção de 141 colaboradores de uma multinacional de tecnologia da informação. Foram feitas análises de regressão linear múltipla e foi utilizada modelagem por equações estruturais (SEM) por meio do método da máxima verossimilhança, de modo a testar os modelos propostos de relações entre as variáveis. Desta forma, foi possível identificar e confirmar a influência das políticas de GP na confiança do colaborador e no bem-estar no trabalho, assim como a influência da confiança nesse bem-estar. Esta pesquisa contribui para o avanço de estudos da área de Gestão de Pessoas e Comportamento Organizacional ao trazer uma relação entre um conjunto de variáveis ainda não explorado e, para a organização pesquisada, serve como um diagnóstico, subsidiando os gestores da empresa em suas tomadas de decisão no afã de melhorar o bem-estar de seus colaboradores.
Impactos do índice Dow Jones, commodities e câmbio sobre o Ibovespa: uma análise do efeito contágio
Authors: Vartanian Pedro Raffy
Published: July 2012

O objetivo da pesquisa é avaliar a existência do efeito contágio do índice Dow Jones, preços das commodities e taxa de câmbio sobre a trajetória do Ibovespa no período 1999-2010, além de verificar as relações de longo prazo entre as variáveis. O marco teórico baseia-senoefeito contágio, em que ocorre a propagação de perturbações no mercado de um país para outro, conforme abordado por Dornbusch, Park e Claessens (2000), Pericoli e Sbracia (2003) e Forbes e Rigobon (2002), além de estudos empíricos como os de Lamounier e Nogueira (2007), Tabak e Lima (2003), Grôppo (2006) e Pimenta (2004), entre outros, complementando com pesquisas dos impactos dos preços de commodities sobre o mercado acionário, conforme pode ser observado em Barr e Kantor (2002). Para tanto, foi aplicado teste de cointegração de acordo com procedimento sugerido por Johansen (1991), além de um modelo de vetores autorregressivos (VAR), proposto inicialmente por Sims (1980) e Sims (1986). Os resultados do teste de cointegração de Johansen não indicaram a existência de relações de longo prazo entre as variáveis. Em termos dos efeitos de curto prazo, as funções de resposta a impulso mostraram que o índice de ações brasileiro reage positivamente aos choques nos preços das commodities e ao índice Dow Jones, além de demonstrar uma reação positiva à depreciação cambial, o que sugere a presença do efeito contágio.
Dona Flor: desintermediar ou ser desintermediada!
Authors: Stange Aline , Montagna Carolina de Arantes , Almeida Victor Manoel Cunha de
Published: July 2012

O caso de ensino Dona Flor apresenta o momento em que Pedro Brasil, sócio-fundador de uma empresa revendedora de produtos eróticos para mulheres por meio de vendas diretas, buscava alternativas não só para manter-se no mercado, como também para crescer. Uma das possibilidades residia no fato de que as consumidoras não reconheciam marcas específicas de produtos, uma vez que não existiam grandes empresas no setor de produtos eróticos. No entanto, a estrutura de canais da empresa apresentava desvantagens para o aproveitamento desta oportunidade. O caso evidencia a fragilidade da empresa na relação com os fornecedores e sua dependência dos distribuidores de catálogos. Os alunos devem avaliar as opções de desintermediação dos elos a montante e a jusante, e suas implicações para os negócios. Além disso, o caso permite avaliar a possibilidade de a própria Dona Flor ser desintermediada e suas opções estratégicas para mitigar esse risco, entre as quais figura a criação de uma marca própria. O objetivo é que os alunos sejam capazes de desenhar o path-tomarket descrito no caso e, a partir dele, elaborar alternativas para a empresa, considerando as vantagens e as desvantagens de cada proposta. Devem ainda perceber a importância do diferencial de privacidade da Dona Flor e as limitações que ele impõe à exploração dos diferentes canais de distribuição.
Demographic, clinical, laboratory and treatment characteristics of spondyloarthritis patients with and without acute anterior uveitis
Authors: Gehlen Marcelo , Regis Kelly Cristina , Skare Thelma Larocca
Published: July 2012

CONTEXT AND OBJECTIVE: Acute anterior uveitis is a common extra-articular manifestation in spondyloarthritis patients. The aim of this study was to compare demographic, clinical, laboratory and treatment data among spondyloarthritis patients with and without acute anterior uveitis. DESIGN AND SETTING: This was a cross-sectional analytical study at the Rheumatology Outpatient Clinic of the Evangelical University Hospital, Curitiba, Brazil. METHODS: Spondyloarthritis patients with without acute anterior uveitis were compared regarding demographic data, spondyloarthritis subtype, peripheral arthritis, enthesitis, disease activity, functional index, physical examination, radiological involvement, HLA-B27 and treatment. RESULTS: Presence of acute anterior uveitis was not found to have any relationship with functional index, degree of radiological involvement, peripheral arthritis or enthesitis. Acute anterior uveitis showed a negative association with skin manifestations (P = 0.04) and a trend towards higher disease activity (P = 0.06). CONCLUSION: In the study sample, it could not be shown that AAU had any association with the functional and radiological prognoses. The patients with spondyloarthritis with and without acute anterior uveitis did not differ clinically except for a higher proportion of ankylosing spondylitis and smaller presence of skin involvement in those with uveitis.
Blood pressure control in hypertensive patients within Family Health Program versus at Primary Healthcare Units: analytical cross-sectional study
Authors: Martins Telma Lima , Atallah Álvaro Nagib , Silva Edina Mariko Koga da
Published: July 2012

CONTEXT AND OBJECTIVE: Hypertension is a public health problem due to its high prevalence and long-term cardiovascular complications. In Brazil in 2005, cardiovascular diseases were responsible for 28% of all deaths. Efforts are being made within primary care to achieve adequate hypertension control. The Family Health Program (FHP) has the aims of promoting quality of life and intervening in factors that put this at risk. The objective of this study was to evaluate the rate of blood pressure control among patients followed up at FHP units compared with those at primary healthcare units (PHUs). DESIGN AND SETTING: Analytical cross-sectional study in the municipality of Petrópolis, Rio de Janeiro, from January to December 2005. METHODS: Five hundred patients with a diagnosis of hypertension were included: 250 were being followed up at two FHP units and 250 at two PHUs. The diagnosis of hypertension was based on the Fourth Brazilian Hypertension Consensus, and the patients needed to have been under follow-up at the units for at least 12 months. Patients' blood pressure was considered to be under control if it was less than 140/90 mmHg at the last consultation. RESULTS: Blood pressure was under control in 29.2% (n = 73) at FHP units and 39.23% (n = 98) at PHUs (odds ratio = 0.64; confidence interval = 0.44-0.93; P = 0.024). CONCLUSION: Blood pressure control was better among patients followed up at PHUs than among those followed up at FHP units.
Auditory processing in children and adolescents in situations of risk and vulnerability
Authors: Murphy Cristina Ferraz Borges , Pontes Fernanda , Stivanin Luciene , Picoli Erica , Schochat Eliane
Published: July 2012

CONTEXT AND OBJECTIVE: Children and adolescents who live in situations of social vulnerability present a series of health problems. Nonetheless, affirmations that sensory and cognitive abnormalities are present are a matter of controversy. The aim of this study was to investigate aspects to auditory processing, through applying the brainstem auditory evoked potential (BAEP) and behavioral auditory processing tests to children living on the streets, and comparison with a control group. DESIGN AND SETTING: Cross-sectional study in the Laboratory of Auditory Processing, School of Medicine, Universidade de São Paulo. METHODS: The auditory processing tests were applied to a group of 27 individuals, subdivided into 11 children (7 to 10 years old) and 16 adolescents (11 to 16 years old), of both sexes, in situations of social vulnerability, compared with an age-matched control group of 10 children and 11 adolescents without complaints. The BAEP test was also applied to investigate the integrity of the auditory pathway. RESULTS: For both children and adolescents, there were significant differences between the study and control groups in most of the tests applied, with significantly worse performance in the study group, except in the pediatric speech intelligibility test. Only one child had an abnormal result in the BAEP test. CONCLUSIONS: The results showed that the study group (children and adolescents) presented poor performance in the behavioral auditory processing tests, despite their unaltered auditory brainstem pathways, as shown by their normal results in the BAEP test.
Enteral nutrition during bone marrow transplantation in patients with pediatric cancer: a prospective cohort study
Authors: Garófolo Adriana
Published: July 2012

CONTEXT AND OBJECTIVE: Cancer patients undergoing bone marrow transplantation (BMT) often require nutritional therapy due to treatment toxicities. The aim here was to evaluate the use of tube feeding and its applicability, indications, contraindications and complications in these patients. DESIGN AND SETTING: Prospective observational study conducted at a public university in São Paulo between January 2002 and August 2007. METHODS: The patients were followed up daily in the BMT unit by a research dietitian. Tube feeding was indicated when oral supplementation proved to be insufficient, when the patient had severe malnutrition or there was an impediment to use of oral feeding. It was contraindicated in the presence of gastrointestinal toxicity of grade 3 and 4 or other conditions that implied a risk or hindered its use or placement. Complications of tube feeding were divided into minor and major, according to whether they had life-threatening implications. RESULTS: Forty-two (47.2%) patients had indications for tube feeding: the main reasons were transplantation inadequate food and supplement intake, insufficient intake with malnutrition or weight loss, severe malnutrition or need for oral fasting. Thirty-one (73.8%) received tube feeding: 11 autologous and 20 allogenic patients (P = 0.04). The main contraindications were severe gastrointestinal toxicities and sinusitis. Minor complications from tube feeding were more prevalent in patients with allogenic BMT, but no major complications were observed. CONCLUSION: Enteral nutrition is a feasible procedure in patients undergoing BMT and should be encouraged. The main difficulty in BMT patients, in relation to tube feeding, is gastrointestinal toxicities.
Clinical investigations for SUS, the Brazilian public health system
Authors: Paula Ana Patrícia de , Giozza Silvana Pereira , Pereira Michelle Zanon , Boaventura Patrícia Souza , Santos Leonor Maria Pacheco , Sachetti Camile Giaretta , Tamayo César Omar Carranza , Kowalski Clarissa Campos Guaragna , Elias Flavia Tavares Silva , Serruya Suzanne Jacob , Guimarães Reinaldo
Published: July 2012

CONTEXT AND OBJECTIVE: Scientific and technological development is crucial for advancing the Brazilian health system and for promoting quality of life. The way in which the Brazilian Ministry of Health has supported clinical research to provide autonomy, self-sufficiency, competitiveness and innovation for the healthcare industrial production complex, in accordance with the National Policy on Science, Technology and Innovation in Healthcare, was analyzed. DESIGN AND SETTING: Descriptive investigation, based on secondary data, conducted at the Department of Science and Technology, Ministry of Health. METHODS: The Ministry of Health's research management database, PesquisaSaúde, was analyzed from 2002 to 2009, using the key word "clinical research" in the fields "primary sub-agenda" or "secondary sub-agenda". The 368 projects retrieved were sorted into six categories: basic biomedical research, preclinical studies, expanded clinical research, clinical trials, infrastructure support and health technology assessment. From a structured review on "clinical research funding", results from selected countries are presented and discussed. RESULTS: The amount invested was R$ 140 million. The largest number of projects supported "basic biomedical research", while the highest amounts invested were in "clinical trials" and "infrastructure support". The southeastern region had the greatest proportion of projects and financial resources. In some respects, Brazil is ahead of other BRICS countries (Russia, India, China and South Africa), especially with regard to establishing a National Clinical Research Network. CONCLUSION: The Ministry of Health ensured investments to encourage clinical research in Brazil and contributed towards promoting cohesion between investigators, health policies and the healthcare industrial production complex.
Gynecomastia: physiopathology, evaluation and treatment
Authors: Barros Alfredo Carlos Simões Dornellas de , Sampaio Marcelo de Castro Moura
Published: July 2012

Gynecomastia (GM) is characterized by enlargement of the male breast, caused by glandular proliferation and fat deposition. GM is common and occurs in adolescents, adults and in old age. The aim of this review is to discuss the pathophysiology, etiology, evaluation and therapy of GM. A hormonal imbalance between estrogens and androgens is the key hallmark of GM generation. The etiology of GM is attributable to physiological factors, endocrine tumors or dysfunctions, non-endocrine diseases, drug use or idiopathic causes. Clinical evaluation must address diagnostic confirmation, search for an etiological factor and classify GM into severity grades to guide the treatment. A proposal for tailored therapy is presented. Weight loss, reassurance, pharmacotherapy with tamoxifen and surgical correction are the therapeutic options. For long-standing GM, the best results are generally achieved through surgery, combining liposuction and mammary adenectomy.
Treatment of bilateral mammary ptosis and pectus excavatum through the same incision in one surgical stage
Authors: Rocha Fernando Passos , Pires Jefferson André , Torres Vinicius Franchini , Fagundes Djalma José
Published: July 2012

CONTEXT: Congenital deformities of the anterior thoracic wall are characterized by unusual development of the costal cartilages. All these medical conditions are frequently associated with a variety of breast deformities. Several surgical techniques have been described for correcting them, going from sternochondroplasty to, nowadays, minimally invasive techniques and silicone prosthesis implantation. CASE REPORT: The present article reports the case of a young female patient who presented bilateral mammary ptosis and moderate pectus excavatum that caused a protrusion between the eighth and the tenth ribs and consequent esthetic disharmony. The proposed surgical treatment included not only subglandular breast implants of polyurethane, but also resection of part of the rib cartilage and a bone segment from the eighth, ninth and tenth ribs by means of a single submammary incision in order to make the scar minimally visible. Correction through a single incision benefited the patient and provided an excellent esthetic result. CONCLUSIONS: The techniques used to repair bilateral mammary ptosis and pectus excavatum by plastic and thoracic surgery teams, respectively, have been shown to be efficient for correcting both deformities. An excellent esthetic and functional result was obtained, with consequent reestablishment of the patient's self-esteem.
El gerente pÃºblico: un profesional indispensable para el desarrollo
Authors: Duque Fernando
Published: July 2012

En mi presentación, deseo describir lo que entiendo por el profesional llamado Gerente Público. Primero, trataré de dar una descripción conceptual y luego ésta, intentaré explicarla e ilustrarla a través de una metáfora. En segundo lugar, trataré de discutir las funciones primordiales que este profesional debe desempeÃ±ar. A continuación discutiré la malla curricular que, a mi juicio, este profesional necesita para su formación acadómica. Finalmente trataré de hacer un anÃ¡lisis del sistema político nacional, concluyendo que este tipo de profesional debe crearse en Chile a la brevedad posible.
Empresarização e controle organizacional: um estudo nos clubes de futebol em Santa Catarina
Authors: Costa Carlos Everaldo Silva da , Silva Rosimeri Carvalho da
Published: July 2012

O futebol é um dos principais esportes praticados no Brasil, tendo grande relação com a identidade do povo brasileiro. Sua divulgação no país, iniciada em 1894 junto a uma elite, não parou de se expandir e atinge hoje todas as classes sociais. O futebol é atualmente gerido por clubes que, na maioria, são organizações sem fins lucrativos, mas que parecem passar por transformações significativas em um processo de mercantilização do esporte. Este artigo busca analisar o quanto clubes que fizeram parte da série A1 (primeira divisão) do campeonato catarinense de futebol de 2000 a 2004 passam a utilizar mecanismos empresariais em suas ações e as transformações que tal utilização implica para o controle organizacional. Como fundamento do estudo, utiliza-se a teoria desenvolvida por Solè (2004) sobre empresarização e para o controle organizacional, entre outros autores, o modelo de Carvalho (1998). Percebeu-se um processo de empresarização acentuado em um clube (Figueirense) e mediano em outros quatro (Joinville, Avaí, Chapecoense e Criciúma). Dois dos clubes analisados parecem oferecer maior resistência ao processo de empresarização.
De French e Raven (1959) ao modelo poder/interação de influência interpessoal: uma discussão sobre poder e influência social
Authors: Mendonça José Ricardo Costa de , Dias Sônia Maria Rodrigues Calado
Published: July 2012

Na literatura sobre comportamento organizacional (CO), observa-se que poder é um tema bastante discutido. Somech e Drach-Zahavy (2002) salientam que a tipologia de French e Raven (1959) tem sido uma das abordagens mais populares para a coneeituação das bases de poder na influência interpessoal. Podemos perceber uma influência do entendimento de French e Raven (1959) acerca de poder e influência e o uso freqüente da tipologia de poder apresentada por eles em livros da área de CO publicados no Brasil. Entretanto, avanços obtidos por Raven não são discutidos. Com base no anteriormente exposto, procura-se neste ensaio resgatar as palavras de French e Raven (1959), de forma a apresentar a idéia original dos autores sem a influência de paráfrases e traduções, partindo do ponto de vista de que tal procedimento pode contribuir para melhor compreendermos os construtos "poder" e "influência". Além disso, é apresentado o modelo poder/interação de influência interpessoal, desenvolvido e discutido em diversos textos por Raven. Utilizando-se as teorias sobre gerenciamento de impressões é feita uma crítica ao modelo poder/interação e proposta uma alteração em relação à sua concepção original.
Managing the employee's soul: Foucault applied to modern management technologies
Authors: Villadsen Kaspar
Published: July 2012

This paper presents an alternative approach to analyse power in modern organisations. It does so by applyingFoucauldian concepts to new types of management technologies, which are directed at the employee's personality. Most often, studies of power and management focus on organisational structures, power games between groups and issues of how to manage processes within and between organisations. We rarely talk about whatcould be termed 'the management of personality'. This paper argues, however, that this kind of Human Resource Management is becoming increasingly important and should be a key focus in critical organisational analysis. It also discusses the consequences and possibilities for employees facing a proliferation of management-ofpersonality technologies.
Pragmatismo e os pragmáticos nos estudos organizacionais
Authors: Meneghetti Francis Kanashiro
Published: July 2012

O objetivo central deste ensaio teórico é avaliar as contribuições do pragmatismo nos Estudos Organizacionais e, os específicos, avaliar se as contribuições teóricas de Charles Peirce e John Dewey possibilitam afirmar o pragmatismo como senso comum, ciência ou teoria do conhecimento; analisar as contribuições - possibilidadese limites - do pragmatismo como conhecimento científico; compreender os percursos do pragmatismo nos Estudos Organizacionais. Chaga-se a conclusão de que ser pragmático é diferente de conceber estudos articulados no campo epistemológico do pragmatismo. O sujeito pragmático vê na sua utilidade e na necessidade deação, o ponto de tensão que coloca em dúvida a veracidade dos pressupostos do pragmatismo como ciência. O que ocorre nos Estudos Organizacionais éa conversão do pragmatismo como conhecimento científico emsubordinação irracional à utilidade e à ação prática, sobretudo, no campo da economia, da política, da ciência, da cultura, da educação, e assim por diante.
Projeto Russas: um exemplo de intervenção sociológica
Authors: Matos Fátima Regina Ney , Almeida Ana Marcia
Published: July 2012

O processo de intervenção analisado neste artigo foi chamado de Projeto Russas e teve início no ano 2000, no município de Russas, no Ceará. O objetivo do projeto foi erradicar e prevenir o trabalho infantil, sob o patrocínio da Fundação BankBoston em parceria com outros atores sociais, como o Conselho Municipal dos Direitos daCriança e do Adolescente, a Pastoral do Menor, a prefeitura municipal e os empresários locais. O Projeto Russas foi um exemplo bem-sucedido de intervenção social: uma ação sistemática contra a exploração da mão-de-obra infantil, viabilizada por seu modelo de participação, que mobilizou toda uma comunidadepara um objetivo. No Projeto Russas, sempre ficou claro o papel da comunidade como partícipe nas decisões. A comunidade mostrou sua competência para descrever seu próprio mundo, sua própria realidade, identificarsuas dificuldades e oferecer sugestões viáveis. Os técnicos souberam ouvir e, assim, conseguiram intervir no sentido de subverter a realidade instituída, de promover uma ruptura no equilíbrio social existente, resgatando uma dignidade há muito perdida na teia econômica. Foi um projeto de intervenção que rendeu dividendos para todos os participantes, principalmente para as crianças e adolescentes. O município de Russas erradicou o trabalho infantil.