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The work evaluated the nucleating effect of nanometric zirconia (Zr-NP), obtained by the green sol-gel synthesis route using Euclea natalensis root extract as a reductant, in the low-density polyethylene (LDPE). The Zr-NP was characterized with x-ray diffraction (XRD) and transmission electron microscopy (TEM) which confirmed the presence of Zr-NP in the cubic crystalline phase with an average particle size of 6.73 nm. The Zr-NP was incorporated into the polymeric matrix by solubilization in concentrations ranging between 0 wt% and 6 wt%. Non-isothermal DSC analyzes demonstrated that a small addition of 1 wt% changes the degree of crystallinity from ~23% to ~56%, an increase of ~137%. The addition of Zr-NP also caused a small increase in crystallization and melting temperatures, and a large increase in the total crystallization time of LDPE.

ABSTRACT Objective: This study aimed to compare the insertion torque (IT), flexural strength (FS) and surface alterations between stainless steel (SS-MIs) and titanium alloy (Ti-MIs) orthodontic mini-implants. Methods: Twenty-four MIs (2 x 10 mm; SS-MIs, n = 12; Ti-MIs, n = 12) were inserted on artificial bone blocks of 20 lb/ft3 (20 PCF) and 40 lb/ft3 (40 PCF) density. The maximum IT was recorded using a digital torque meter. FS was evaluated at 2, 3 and 4 mm-deflection. Surface topography and chemical composition of MIs were assessed by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). General linear and mixed models were used to assess the effect of the MI type, bone density and deflection on the evaluated outcomes. Results: The IT of Ti-MIs was 1.1 Ncm greater than that obtained for the SS-MIs (p= 0.018). The IT for MIs inserted in 40 PCF test blocks was 5.4 Ncm greater than that for those inserted in 20 PCF test blocks (p < 0.001). SS-MIs inserted in higher density bone (40 PCF) had significantly higher flexural strength than the other groups, at 2 mm (98.7 ± 5.1 Ncm), 3 mm (112.0 ± 3.9 Ncm) and 4 mm (120.0 ± 3.4 Ncm) of deflection (p< 0.001). SEM evidenced fractures in the Ti-MIs. EDS revealed incorporation of 18% of C and 2.06% of O in the loaded SS-MIs, and 3.91% of C in the loaded Ti-MIs. Conclusions: Based on the findings of this in vitro study, it seems that SS-MIs offer sufficient stability and exhibit greater mechanical strength, compared to Ti-MIs when inserted into higher density bone.

A partir de narrativas autobiográficas de professoras de Biologia, construídas em um dispositivo de pesquisa-formação, apresentamos um exercício interpretativo, tendo como fio condutor a relação entre tempo e narrativa, proposta por Paul Ricoeur (2010). Na análise, entendemos que os acontecimentos apresentados ocorrem em tempos distintos, pois alguns já aconteceram (passado) e outros são apenas esperados (futuro), desdobrando-se no triplo presente: passado, que contém imagens-vestígios das professoras; o do presente, das histórias de vida, partilha e edição no grupo, alcançando compreensões relacionadas à formação inicial; e o do futuro, que carrega imagens-sinais de projetos pessoais e profissionais.

ABSTRACT The application of silicon (Si) in plants benefits the performance of several species. However, the dynamics of the element, mainly in non-accumulating species such as tomatoes, are rarely analyzed. This study investigated the dynamics of Si in tomato plants cultivated under different forms of application and water conditions. The experiment was carried out in a completely randomized design with four replications, using a factorial scheme 2 x 4: two water conditions (60 and 100% of the evapotranspiration of the crop - ETc), and four forms of silicon application (without application, full dose applied at soil, split dose applied at soil, and foliar application). Si content in the soil and in the different plant organs were analyzed. Si content in the soil increased after the crop cycle depending on the application form (full or split doses). The dynamics of Si accumulation and extraction by tomato are influenced by the application form (higher in soil application) and water management, with fruits and leaves having the higher values. Si application, mainly in the soil, increased the rate of Si accumulation and extraction by tomatoes cultivated in different water conditions.

The Montmorillonite-Erucamide nanocomposite (MMT-EU) can be used to reduce and to control the values of coefficient of friction of low-density polyethylene films (LDPE), widely used by the food industry. In this work, the effect of the addition of 5 wt% and 10 wt% of MMT-EU on the mechanical properties of LLDPE films involving the weld region was investigated. The MMT-EU concentration range was defined considering its possible technological application as an additive to stabilize the friction coefficient of polymeric films. The result shows a significant improvement in the values of stiffness, strength and ductility of polymeric films. In addition, it did not change the coefficient of friction, but the brightness of the LLDPE films decreased and the opacity increased, due to the increase in the crystallinity degree of the LLDPE polymer promoted by MMT-EU, not being a problem for the application of these films.

This research was aimed to obtain biodegradable polymeric films with antifungal action against Aspergillus niger, through the addition of copper oxide nanoparticles (CuO-NPs) in the commercial polymer (Ecoflex®) and to evaluate its mechanical, morphological, biodegradation, and copper release properties. The microbiological results showed that the films with 4 wt% CuO-NPs inhibited 97.57% the growth of the fungus growth of 1×105 spores·mL-1 compared to the control. The morphological characterization revealed that the CuO-NPs presented irregular form with particles size of 50 to 400 nm and the XRD showed characteristic peaks of copper oxide. The addition of CuO-NPs to Ecoflex® provided increased maximum and rupture tension, strain, and elasticity modulus the obtained films with 1 wt% CuO-NPs and did not alter the biodegradability of the films. It can be said that, through the addition of CuO-NPs to Ecoflex®, it was possible to add antifungal activity for Aspergillus niger without compromising its biodegradability, meeting the safety standards established by legislation regarding the release of copper.

Delimitar regiões sujeitas a inundações, relacionando quantitativamente a profundidade de submersão ao tempo de recorrência da chuva é essencial para subsidiar as decisões nas grandes metrópoles, fornecendo a base para que o poder público planeje suas ações a fim de mitigar danos à população. Este trabalho tem como objetivo a delimitação de manchas inundação para a bacia hidrográfica do Córrego Ipiranga, São Paulo – SP, com 23,1 km² de área de drenagem, que sofre recorrentemente com inundações. Para isso, foi realizada a modelagem hidrológica para eventos de chuva com Tempo de Retorno (TR) 10, 25 e 100 anos. As simulações foram realizadas, inicialmente, com parâmetros hidrológicos e hidráulicos estimados com base na bibliografia de referência e, posteriormente, calibrados com base em 11 eventos chuva-vazão monitorados na bacia. As vazões calibradas foram utilizadas para gerar as manchas de inundação correspondentes aos TRs estudados e apresentaram, em média, picos de vazão 16% aos valores obtidos antes da calibração. As manchas de inundação apresentaram área de 1,79 km² para TR 10, 1,98 km² para TR 25 e 2,21 km² para TR 100 e, atingem, respectivamente, cerca de 3019, 3423 e 3854 edificações. As manchas simuladas convergem em sua maioria com ocorrências de inundações mapeadas na bacia por outros autores, na altura dos distritos do Ipiranga, Cambuci, Vila Mariana, Cursino e Saúde, indicando que os resultados obtidos estão coerentes com os observados e podem contribuir no planejamento de prevenção às enchentes na região. Assim, visto a diferença das vazões de pico antes e após a calibragem, atenta-se para a necessidade da calibração das simulações hidrológicas com dados observados e, dado o número de imóveis atingidos, ressalta-se a importância de investir em medidas de prevenção de enchentes baseadas em estudos de custo-benefício das intervenções.

Ionic polymer-metal composites (IPMC) are typical electromechanical transducing materials suitable for use as soft actuators, bioinspired artificial muscles and sensors. However, IPMC produced with platinum films has the great disadvantage of the large number of cracks and wrinkles, which reduce the performance of the electrode. Polyaniline (PANI) is a promising conductive polymer that can address this issue, especially when it is electropolymerized on the platinum surface. An IPMC/PANI actuator was developed by potentiostatic electropolymerization of PANI at 0.9 V in 0.1 M and 0.3 M aniline solution. The characterization revealed that PANI is preferentially electropolymerized in the platinum film cracks and improve the electronic conduction mechanisms, which is not reported so far. The maximum tip displacement of the IPMC/PANI under 5 V was 8.3 mm, while for the IPMC was equal 5.2 mm. These results provide a simple and effective method to repair IPMCs and enhance their electromechanical performances.

Composites based on green high-density polyethylene (G-HDPE) and hydroxyapatite (HA) compatibilized with maleic anhydride grafted high-density polyethylene (HDPE-g-MAH) were developed in this work. The main objective was to evaluate the effects of HA and HDPE-g-MAH contents on the mechanical and thermal properties and hydrolytic degradation of composites through design of experiments and statistical analysis, as well as to evaluate the hemolytic stability. Hydroxyapatite acts as a reinforcing agent for the G-HDPE matrix while the HDPE-g-MAH acts as a compatibilizing agent, improving the dispersion of the HA particles in the polymer matrix and thus increasing the mechanical properties. The crystallization temperature and the degree of crystallinity of the polymer matrix were increased with the addition of HA, suggesting the filler acts as a heterogeneous nucleating agent. Hemolysis tests performed on a composite sample with best mechanical performance did not indicate significant hydrolytic degradation, which suggests this composite is a promising material to be used in bone tissue engineering, for application in implants and bone grafts.

Current trends in aero-engine design are oriented at designing high-lift low-pressure turbine blades to reduce engine weight and dimensions. Therefore, the validation of numerical methods able to correctly capture the boundary layer transition at cruise conditions with a steady inflow for high-speed blades is of great relevance for turbine designers. The present paper details numerical simulations of a novel open-access high-speed low-pressure turbine test case that are performed using RANS-based transition models. The test case is the SPLEEN C1 cascade, tested in transonic conditions at the von Karman Institute for Fluid Dynamics. Both physics-based and correlation-based transition models are employed to predict blade loading, boundary layer characteristics, and wake development. 2D simulations are run for a wide range of operating conditions ranging from low to high transonic Mach numbers (0.7–0.95) and from low to moderate Reynolds numbers (70,000–120,000). The γ-Re˜θt transition model shows a good performance over the whole range of simulated operating conditions, thus demonstrating a good capability in both reproducing blade loading and average losses, although the wake’s width is underestimated. This leads to an overestimation of the total pressure deficit in the center of the wake which can exceed experimental measurements by more than 50%. On the other hand, the k-ν2-ω model achieves satisfactory results at Ma6,is = 0.95, where the boundary layer state is affected by the presence of a weak shock impinging on the blade suction side which thickens the boundary layer, leading to a predicted shape factor equal to five, downstream of the shock. However, at low and moderate Mach numbers, the k-ν2-ω model predicts long or open separation bubbles contrary to the experimental findings, thus indicating insufficient turbulence production downstream of the boundary layer separation. The slow boundary layer transition in the aft region of the suction side that is exhibited by the k-ν2-ω model also affects the prediction of the outlet flow, featuring large peaks of a total pressure deficit if compared to both the experimental measurements and the γ-Re˜θt predictions. For the k-ν2-ω model, the maximum overestimation of the total pressure deficit is approximately 60%.

The influence of unsteady wakes incoming from the upstream stages is of high relevance in modern high-speed, low-pressure turbines (LPT) operating at transonic exit Mach numbers and low Reynolds numbers for their potential to trigger transition and influence the separation of the boundary layer on the blade suction side. The aim of this paper is the experimental characterization of the influence of incoming wakes on the 2D aerodynamics of a high-speed LPT cascade operating at a low Reynolds number and transonic exit Mach number. A detailed analysis of the status of the flow along the blade under investigation and its impact on the profile loss are presented for a range of Mach numbers from 0.70 to 0.95 and Reynolds numbers from 70k to 120k under steady and unsteady inflow conditions. Tests were conducted at on- and off-design engine realistic conditions in the VKI S-1/C wind tunnel on the SPLEEN C1 transonic cascade. The wakes incoming from an upstream blade row have been replicated using a set of rotating bars, which shed wakes at an engine-representative reduced frequency (f+=0.95) and flow coefficient (Φ=0.80). A set of densely instrumented traversable blades were used to sample the surface pressure distributions. The development of the boundary layers along the blade suction side is examined through quasi-wall shear stress obtained with surface-mounted hot-film sensors. Wake traverses were carried out downstream of the cascade with a miniaturized L-shaped five-hole probe to characterize the blade losses. The introduction of periodic incoming wakes promotes variations in the flow topology over the blade. The effect on the suction side separation bubble is shown to depend on the exit flow conditions. At low Mach numbers, the incoming wakes determine a reduction in the size of the bubble; in contrast, this effect is not registered as the exit Mach number increases. Consistently, a high dependence of the unsteady wake effect on the profile loss on the exit Reynolds and Mach numbers is demonstrated.

The aerodynamics of a high-speed low-pressure turbine (LPT) cascade were investigated under steady and unsteady inlet flows. The tests were performed at outlet Mach (M) and Reynolds numbers (Re) of 0.90 and 70k, respectively. Unsteady wakes were simulated by means of a wake generator equipped with bars. A bar reduced frequency (f+) of ∼0.95 was used for the unsteady case. The inlet flow field was characterized in terms of the total pressure profile and incidence. The blade aerodynamics at midspan and the secondary flow region were investigated by means of pneumatic taps and hot-film sensors. The latter provided a novel view into the impact of the secondary flows on the heat transfer topology on the blade suction side (SS). The cascade performance was quantified in terms of the outlet flow angle and losses by means of a directional multi-hole probe. The results report the phase-averaged impact of unsteady wakes on the secondary flow structures in an open test case high-speed LPT geometry.

Foreign bodies in the external ear are very common. The same cannot be said about foreign bodies in the Eustachian tube (ET). We report the case of a 63-year-old woman with a history of painless left side otorrhea and hearing loss. She reported a left ear surgery when she was 30-year-old but she did not know the diagnosis that was made at that time neither the kind of surgery performed. Otoscopic examination revealed an inferior perforation of the eardrum. Audiologic evaluation demonstrated a unilateral, moderate-severe mixed hearing loss. Computed tomography scan showed, in left ear, a soft tissue density filling the middle ear cavity and a foreign body in ET. The patient underwent middle ear exploration which required endoscopic assistance to visualize and remove the foreign body. It appeared to be a stapes prothesis of Robinson type. The displacement of a stapes prosthesis to the ET has not been reported in the literature. Surgeries in this region are challenging. This case highlights the importance of the integration of endoscopy into otologic surgery.

The objective of this study was to evaluate the efficiency of dissolved ozone flotation (DOF) in comparison to dissolved air flotation (DAF) for treatment of milk industry wastewater (MW). In the first phase of the experiment, a synthetic milk wastewater (SMW) was used to evaluate DOF and DAF, with and without addition of hydrogen peroxide, at pH 4.0 and pH 11.4. In the DOF tests, the concentration of ozone was equal to 19 (± 0.5) mg L-1 and in the tests with addition of hydrogen peroxide, the H2O2/O3 ratios tested were 0.5, 1.0 and 1.5. In the second phase, tests were performed using three MW from three different industries to validate the results obtained and to determine the DOF system's ability to treat this type of effluent. The parameters tested during validation were turbidity, total suspended solids, oils and greases (O&G), chemical oxygen demand (COD), biochemical oxygen demand (BOD), total nitrogen (TN) and total phosphorus (TP). It was observed that the efficiency of the treatments was better at pH 4.0. The results showed a reduction of the efficiency with the use of DOF. The addition of H2O2 in DAF and DOF also resulted in reduced system efficiency. The results obtained with SMW only approximated those obtained with the MW from one of the industries that contained the largest traces of milk and cheese.

Este artigo tem como objetivo compreender os desafios e as necessidades de professores de Ciências e/ou Biologia dos estados que compõem a SBEnBio – Regional 4 (MG/GO/TO/DF), diante do ensino remoto emergencial. A partir da escuta sensível das demandas dos professores, com embasamento teórico e metodológico freireano e da decolonialidade, propusemos um curso de extensão: “Escolas e territorialidades em contextos de incertezas: construindo BIONAS”. Os resultados apresentam como desafios, entre outros, a falta de formação e experiência prévia dos professores para produzirem as atividades remotamente, as habilidades básica e intermediária com as TDICs e a conciliação do ensino remoto com os cuidados domésticos. Diante dessa conjuntura pandêmica, consideramos emergencial resistir a uberização do trabalho docente e a mcdonização do currículo.

Abstract The loss of continuity of the nerve structure interrupts the transmission of nerve impulses and leads to the disorganization of functional activities. Many methods, as the use of neurogenic factors, aid in the process of neural regeneration by accelerating or improving peripheral nerves neoformation. The adipose tissue is abundant in the human body, and it has presented promising results in the regeneration of peripheral nerves. We carried out a randomized controlled study in 9 months, using 45 male Wistar rats, 80 days old, and the sciatic nerve was chosen for analysis. The control animals were divided into three groups – Initial group (IG), Final group (FG), and denervated group (DG) – with seven animals each. The experimental groups, with twelve animals each, were polyethylene tube filled with fat (EGF) and polyethylene tube without filling (EGwf). All groups, except IG, were submitted to 10 sessions of hyperbaric oxygen treatment of 1h 45 min in alternating days. Functional evaluation by walking-track was assessed using the Catwalk XT® software and tissues were harvested and stained with 1% toluidine blue for histological analysis. Quantitative data were first analyzed with the Kolmogorov Smirnov normality test. Comparison between the four groups was analyzed by ANOVA followed by Tukey Test. We concluded that hyperbaric oxygen therapy had positive results on morphometric and functional parameters. However, no significant differences were found regarding the use of autologous fat graft.

No artigo, questionamos: quais seriam os motivos da atribuição aos IFs da função de formar professores? Com que prerrogativas legais os IFs realizam esse trabalho? Em quais regiões do Brasil predominam seus cursos de formação de professores? Quais cursos são privilegiados? Que contribuições os IFs têm dado ou podem dar à formação professores? Para respondê-las utilizamos como fonte documental pesquisas sobre o tema dos IFs e da formação de professores, a Lei nº 11.892/2008, bem como dados da Plataforma Nilo Peçanha. As licenciaturas nos IFs supririam parte da carência de professores no país, contribuíram para a universalização do Ensino Médio e poderiam resolver o problema da atuação de tecnólogos e/ou bacharéis na docência. Até o ano de 2018, há 647 campi de IFs, oferecendo 26 licenciaturas, distribuídas em 771 cursos, sendo 62,3% da área de ciências e matemática, 25,5% de ciências humanas e sociais e 12,2% de formação de professores para EPT. As contribuições dos IFs à formação de professores levam em conta a qualidade da Educação Básica de nível médio e da EPT e ainda o fato de que os IFs podem ampliar a formação docente para as áreas da EPT, que tanto sofrem por falta de professores especializados.

A consorciação de milho e Urochloa ruziziensis apresenta potencial para os sistemas de produção agrícola, permitindo a produção de grãos e biomassa remanescente. O estudo tem como objetivo avaliar a produtividade e a viabilidade econômica das modalidades de consórcio de milho e U. ruziziensis na região noroeste do Paraná. O experimento foi conduzido em Maringá-PR, em delineamento inteiramente casualizado com cinco tratamentos (milho solteiro; U. ruziziensis solteira; milho com U. ruziziensis na entre linha; milho com U. ruziziensis na mesma linha; milho com U. ruziziensis em linhas intercaladas) e quatro repetições. Foi analisado o desenvolvimento inicial e produtividade de grãos do milho, e produção de biomassa de milho e U. ruziziensis. Os dados foram submetidos a análise de variância e as médias comparadas pelo teste Tukey com significância de 5%. No desenvolvimento inicial das plantas de milho não houve diferença significativa em função da consorciação. U. ruziziensis em sistema consorciado apresentou redução na produção de biomassa. O cultivo em linhas intercaladas apresentou produtividade de grãos superior as demais modalidades de consorciação e semelhante ao cultivo de milho solteiro.

Crop biomass plays an important role, especially in tropical and subtropical crops that adopt the no-tillage system, whose decomposition is related to material composition and environmental conditions. The objective of this work was to analyze the decomposition of straw remaining from autumn/winter crops in the development of soybean in succession in the Midwest region of Paraná. The experiment was conducted between 2019 and 2021 in a completely randomized design, with eight treatments (spontaneous, black oat, brachiaria, corn, wheat, oilseed radish, corn + brachiaria, and black oat + oilseed radish) and four replications. After autumn/winter cultivation, biomass samples were dried and placed in nylon bags, returning to the original plot during soybean sowing. The decomposition bags were collected in seven periods over 120 days, coinciding with the soybean cycle. The decomposition rate was analyzed by regression. The regression equations and the amount of biomass remaining from the autumn/winter seasons were determinate the half-file and the remaining mass on the soil surface at sowing and at 30, 60, 90, and 120 days after sowing. Biomass production and decomposition rate varied with the season, depending on environmental conditions. Wheat had the lowest decomposition rate with a half-life greater than 100 days. Intercropping crops reduce the decomposition rate.

ABSTRACT Computational fluid dynamics (CFD) techniques have become an important tool for investigating and predicting flow behavior in many industrial and engineering processes. In the last two decades, CFD has been used for the study, design, and improvement of irrigation equipment. Numerical simulations can be used to predict fluid flow, heat transfer, and chemical reactions within complex systems. The objective of this review is to provide an overview of the uses of CFD in irrigation engineering applications. The paper is organized into two main sections: fundamentals of CFD and irrigation engineering applications. The first section presents the main methods used in numerical simulations, basic equations to predict fluid flow parameters, meshing concerns, and convergence criteria. In the second section, we present applications related to friction and local head losses in pipes, liquid and solid-liquid flow simulation in drippers, chemical scaling, filters, sprinklers, direct-acting pressure-regulating valves, and Venturi injectors. The briefly described applications indicated that CFD modeling can be an accurate, quick, and feasible method for the investigation of flow parameters in irrigation pipes, fittings, emitters, and accessories. The CFD simulations can be useful for designing new products as well as for improving and optimizing existing products. Computational fluid dynamics uses in irrigation engineering must be encouraged, particularly for innovation purposes resulting from the cooperation between academia and irrigation companies.

The mini-laparoscopic cholecystectomy (MLC) was first performed in 1996, as the logical advancement of the conventional laparoscopic cholecystectomy. In Brazil, mini-laparoscopy was first performed in 1998, by Professors Peter Goh and Go Wakabaiashi, who performed a cholecystectomy using 3-mm instruments. The first study, with a considerable number of patients, was performed in Recife by Dr. Carvalho, and he reported that 719 patients were submitted to a MLC with a small rate of conversion for conventional laparoscopy. We discuss the development of mini-laparoscopy in Brazil for the past 20 years.

A qualidade da água captada para abastecimento desempenha papel significativo na seleção das tecnologias de tratamento. Esta qualidade pode ser determinada, de forma reduzida, através do Índice de Qualidade das Águas (IQA). Por meio do IQA, pode-se classificar os corpos hídricos em classes ou níveis de qualidade. Neste estudo, foi determinado o IQA em um ponto do ribeirão São Bartolomeu, no município de Viçosa-MG, especificamente, no reservatório de acumulação de água, localizado no campus da Universidade Federal de Viçosa (UFV), onde há captação da água por parte do Serviço Autônomo de Água e Esgotos (SAAE) para abastecimento de parte da zona urbana do município e captação por parte da UFV para abastecimento do campus. As amostras foram analisadas quanto aos parâmetros físicos, químicos e microbiológicos: pH, turbidez, temperatura, oxigênio dissolvido, saturação de oxigênio, fósforo total, nitrogênio total, nitrato, demanda bioquímica de oxigênio (DBO), demanda química de oxigênio (DQO), condutividade elétrica, sólidos totais (ST), sólidos dissolvidos totais (SDT), sólidos suspensos totais (SST), sólidos sedimentáveis (SP), alcalinidade, coliformes totais e termotolerantes. As amostragens de água foram realizadas durante o período seco, de março a julho de 2016. A determinação do IQA permitiu classificar as águas do trecho onde ocorre a captação para abastecimento como de média qualidade, portanto, são apropriadas para tratamento convencional visando o abastecimento público. Das variáveis estudadas, apenas os SDT e a DBO não atenderam aos padrões estabelecidos na Resolução Conama 357/2005 para rios de classe 2.

ABSTRACT Objectives: to describe the use of affinity chromatographies and laboratory serologies in the evaluation of immunodiagnoses during prenatal. Methods: quantitative study, characterized as a descriptive observational research. Data was collected from the records of 46 pregnant women who were in prenatal follow up in the Primary Health Care in a capital in the South of Brazil. The data found was codified and analyzed using descriptive statistics. Results: a mean of 43.1 days was found to take place between the request of laboratory serology and the evaluation by a professional. It was also found that 21.7% of pregnant women did not collect the serologies requested during the first prenatal consultation, and that the affinity chromatographies were only applied in 10.8% of the participants. Conclusions: in spite of the studies for the improvement of prenatal consultations, for the provision of new technologies and for the permanent education offered to the professionals, there are still questions that make the actual implementation of affinity chromatographies more difficult.

Spontaneous rupture of the urinary bladder (SRUB) is a rare urological emergency and even more uncommon in the puerperium. Post-partum bladder rupture might be associated with fetal pressure on the not emptied bladder wall during labor. We report a case of SRUB three days after normal vaginal delivery with high values of creatinine and absence of hematuria, surgically managed in an emergency hospital in the Amazon.

Goal: This article describes a simulation exercise based on the premises of the experiential learning approach, using Lego® blocks to build a production plant model. Design / Methodology / Approach: The simulation was applied to groups of 4 to 6 participants, enrolled in production management or similar classes. Results: The use of this approach promoted a learning environment with greater interaction and stimulated the students to put their reasoning, decision-making and communication skills into practice. Limitations of the investigation: Because the simulation is only a representation of reality, it can generate some generalization, and since it is a controlled experiment, all the variables are known in advance. Therefore, the practices using the simulation should be discussed and contrasted with real-world practices after application of the method. Practical implications: This simulation enables examining themes such as inventories, supply chains, production planning and scheduling, layout, MRP, and mainly integration of organizational processes in practice, promoting hands-on experience. Originality / Value: The reports of the participants indicated a positive impact of the proposed simulation, by stimulating the development of skills and capabilities for their training as future managers.

We describe the original technique used for the treatment of a patient who presented with pain and bulging in the abdomen, who was diagnosed with Spigelian hernia (SH) using ultrasound. In this case, the hernia occurred in the anterolateral abdominal wall with herniation of the distal ileum and mesentery, in addition to a large right inguinal hernia. A mini-laparoscopic approach was proposed; due to Child-A hepatic cirrhosis, it was done by a hybrid technique, using a harmonic scalpel. The primary closure of the hernia defects was performed, followed by the placement of a polypropylene mesh in the preperitoneal space. The mesh was fixed. In this case, the inguinal hernia was homolateral to the SH. Following the surgery, the patient had no further complications, being discharged the day after the procedure.

A female patient, 20 years old, with a history of a progressive increase in abdominal volume on the left side, starting 3 years ago, with no associated symptoms and no history of trauma. Ultrasonography and a computed tomography scan of the abdomen were performed, which revealed a large splenomegaly, and a partial minilaparoscopic splenectomy was indicated. We opted for unroofing of the cyst, and the procedure was uneventful, with a total surgical time of 47 min. The patient progressed clinically well, without abdominal pain, being discharged on the 2nd post-operative day.

A female patient, 59-year-old, was complaining of abdominal pain in the right hypochondrium and mesogastrium for 6 months. Ultrasonography and abdominal computed tomography were performed, both confirming a large hepatic cyst (10.6 cm × 7.6 cm × 7.3 cm) on the left lobe. A hybrid minilaparoscopic resection was proposed. We opted for unroofing the cyst, and the procedure was uneventfully performed, with a total surgical time of 60 min. In the post-operative the patient did well, with minimal abdominal pain, being discharged on the 5th post-operative day, after drain removal due to the use of intravenous antibiotic therapy.

Introduction. This report aims at demonstrating the treatment of complex mandibular fracture functional reimplantation of the maxillary alveolar fragment (FRAF), denoting the possibility and feasibility of this reduction with an excellent prognosis. Case Report. Patient E.M.S, 25 years old, male, leucoderma, referred to the Emergency Room of our institute. He reported being a victim of physical aggression, occlusal alteration, limitation of mouth opening, sensibility loss in the mentalis region, right infraorbital, and denied visual alteration. On physical examination, during the inspection and palpation, the crackling was observed in the right mandibular region and apical displacement of the maxillary alveolar process, corresponding to elements 13, 14, and 15. Conclusion. The rigid fixation of the complex jaw fracture and alveolar maxilla process, through functional reduction, indicated satisfactory applicability, and favorable prognosis.

Tetracycline is used to treat various diseases in animals and humans, so its high use causes this substance to be frequently found in effluents and in potable water reservoirs, causing serious problems for human health and the environment. Many processes are applied and evaluated in an attempt to removal tetracycline found in environment, such as adsorption. The application of iron-carbon nanoparticles with core-shell structure (Fe3O4@C) as adsorbent, can be an alternative to removal of these contaminants. In the present study Fe3O4@C nanoparticles were synthesized and used to adsorb tetracycline in aqueous solutions. The core-shell characterization was performed using X-ray diffraction techniques, infrared spectroscopy, surface area, chemical analysis and morphology, and adsorption capacity through isotherms. The results indicated that Fe3O4@C nanoparticles presented good tetracycline removal capability, 73.3%, when applied an initial concentration of antibiotic of the 30 mg L-1 and 0.5 g of adsorbent.

Zinc is an important chemical element in many metabolic mechanisms at low concentrations, but can be toxic when administrated in doses higher than 500 µg·g-1 or 3 mg·L-1. This metal has been detected in many aquatic environments due to several industry activities and swine manure effluents. Thus, the contaminant removal of water and wastewater has been a major challenge. Many processes are applied and evaluated in an attempt to removal zinc found in environment, such as adsorption. In the present study Fe3O4@C core-shell nanoparticles were synthesized and used to adsorb ionic zinc species in aqueous solutions. The core-shell nanoparticles exhibited excellent zinc removal capacity, with a maximum efficiency equal 65% where applied in an aqueous solution containing 10 mg·l-1 of this ionic metal.

Forest land-use planning and restoration requires effective tools for mapping and attributing linear disturbances such as roads, trails, and asset corridors over large areas. Most existing linear-feature databases are generated by heads-up digitizing. While suitable for cartographic purposes, these datasets often lack the fine spatial details and multiple attributes required for more demanding analytical applications. To address this need, we developed the Forest Line Mapper (FLM), a semi-automated software tool for mapping and attributing linear features using LiDAR-derived canopy height models. Accuracy assessments conducted in the boreal forest of Alberta, Canada showed that the FLM reliably predicts both the center line (polyline) and footprint (extent polygons) of a variety of linear-feature types including roads, pipelines, seismic lines, and power lines. Our analysis showed that FLM outputs were consistently more accurate than publicly available datasets produced by human photo-interpreters, and that the tool can be reliably deployed across large application areas. In addition to accurately delineating linear features, the FLM generates a variety of spatial attributes associated with line geometry and vegetation characteristics from input canopy height data. Our statistical evaluation indicates that spatial attributes generated by the FLM may be useful for studying and classifying linear features based on disturbance type and ground conditions. The FLM is open-source and freely available and is aimed to assist researchers and land managers working in forested environments everywhere.

Because of the anterior disposition on the face and the fragility of the anatomy, the mandible is commonly affected in facial fractures, and the angle region represents 32% of the mandibular fractures; therefore, the objective of the paper was to present a proposal for late correction of the mandibular fracture already consolidated and with occlusal alteration. Patient J.C.P.R., 32, during anamnesis reported loss of sensibility in the mentalis region as well as unilateral posterior open bite for having been a victim of an automobile accident about 1 year and 3 months ago. Physical examination showed elevation in the right mandibular angle region due to the poor positioning of fractured stumps. It has been found that the patient suffered a simple fracture at the mandibular angle, but that had not been treated previously, and it was necessary to treat the fracture sequel. Refraction was performed with a new reduction and fixation through titanium plates and screws, showing that, even being late, the procedure to reduce the fracture sequela was effective, even with the correct functional occlusal adjustment.

Water used for human consumption may contain various impurities and solid particles in suspension that increase its turbidity level. Moringa oleifera Lam is a plant that has the potential to be used as coagulating agent in removing turbidity. The objective of this work was to evaluate the efficiency of Moringa oleifera seeds used in shells and without shells in the removal of turbidity from waters with different degrees of turbidity. Waters were used with 70, 250 and 400 initial NTU obtained synthetically. The extract of moringa seeds was prepared using unshelled and shelled seeds, seeking a simplified procedure and practice. The sedimentation times and dose of coagulant solution used were based on existing recommendations in the literature. All treatments were performed with three replicates and the averages depicted in graphs. The results showed that the use of extract of moringa seeds in shells was more efficient than with unshelled seeds in the removal of turbidity of all treatments and that the shelled seeds removed more than 99% of the initial turbidity of the water samples. Furthermore, there was a direct relationship between turbidity removal efficiency and the level of initial turbidity of the samples. The seeds were more efficient in removing turbidity of the water with a higher level of initial turbidity.

Engagement with social media is increasing within medical professionals. There are many different platforms, such as Facebook, Instagram, Whatsapp, Twitter, Telegram, and so on. Social media is a new and important tool for surgical education. More and more surgeons are joining restricted groups to discuss surgical techniques, manuscripts, etc in a daily basis. It is important that residents and surgeons have a very critical opinion about what they look online. Not everything is good or feasible.

Here is presented a computational tool named AzimuthFinder, for functioning inside the set of programs of ArcGis®. The developed program is intended to facilitate and optimize the generation of azimuth data tables, using structural lineaments previously traced in maps that are being worked on that automatic information system. The characteristics of AzimuthFinder allow that, upon the user’s choice, different tables get generated for the same analysis object, depending on the relative weight attributed to the lineaments, giving for example greater weight to those of greater extension. Another characteristic of the tool is the file exportation in TXT format, which is universal to several types of programs, with specific formatting to one the software between Stereo32, Win Tensor, OpenStereo and StereoNet7, which are all free software prepared to the confection of rose diagrams. Tests with the program showed that it is very efficient and fast for generating the azimuth data tables, effectively allowing easier confection of rose diagrams, which are necessary for the structural analysis in areas submitted to fragile deformation.

Prostate cancer represents the most frequent non-cutaneous neoplasia in males. This type of neoplasia can develop peculiar patterns of evolution, presenting, in many cases, precocious relapses and metastasis. Bone metastasis in the mouth is extremely rare, and represents 1% of all malignant mouth neoplasias. The aim of the present study is to report a clinical case of bone metastasis in the mandibular region associated with a tumoral prostate adenocarcinoma, as well as to discuss connected aspects about diagnosis, prognosis and integrated treatment of this condition.

The aim of this study was to verify the prevalence of malocclusion in all preschool aged children in the municipality of Lavrinhas, SP, to know the most common orthodontic problems thus allowing proper orientation. Clinical examinations of 257 children were performed by viewing the dental arches, relating them to the criteria used to classify normal occlusion, transversal, vertical, sagittal and space problems. Data were tabulated and submitted to descriptive statistical analysis (%) and Pearson correlation test (0.05). A high incidence of malocclusion (91.05%) was found as well as negative correlation (r=-0.189) and statistically significant (p=0.002) between cavity and diastema, and between the absence of malocclusion and caries (r=-0.668; p=0.0001); and positive correlation (r=0.418) and statistically significant association between open bite and Class II (p=0.0001), atresia and crossbite (r=0.425; p=0.0001); atresia, cross and open bite (r=0.235; p=0.0001) and Class II, open bite, atresia and crosses (r=0.443; p=0.0001). The results demonstrate the need for establishment of orthodontic treatment, and appropriate guidelines for hygiene, nutrition and the removal of deleterious habits. The payment of orthodontics in public health services is important and, when initiated at an early stage (preventive/interceptive), has much lower costs enabling a possible treatment.

CONTEXTO: Hemocultura positiva associada a cateter venoso central tem sido estudada em unidades de terapia intensiva (UTI), mas ainda é controverso se o acesso jugular tem maior incidência de complicações infecciosas que o acesso na veia subclávia. OBJETIVO: Comparar índice de infecção entre os acessos na jugular interna e os na veia subclávia em pacientes internados nas enfermarias de cirurgia. MÉTODOS: Estudo prospectivo, descritivo e comparativo com 114 cateteres em 96 pacientes admitidos nas enfermarias de cirurgia de um Hospital Quaternário, tendo como variáveis o local de inserção, número de lumens, tempo de uso, comparando-os com o índice de complicações infecciosas. RESULTADOS: O índice de infecção foi de 9,64% (11 cateteres), sem significância estatística quando comparados o número de lumens (mono versus duplo) e infecção (p=0,274); também sem significância estatística a comparação entre o tempo de uso (>14 dias) e infecção (p=0,156). Comparando os acessos jugular e subclávia, encontramos significância estatística tendo infecção em 17,2% na subclávia e 1,8% na jugular, com p=0,005. Índice de Hemocultura positivo associado a cateter venoso central foi maior no acesso subclávia quando comparado com jugular interna, com OR 11,2, IC95% (1,4-90,9; p=0,023). CONCLUSÕES: O acesso venoso central na jugular interna tem menor risco de infecção se comparado com subclávia em enfermarias.BACKGROUND: Positive hemoculture associated with central venous catheters has been studied in intensive care units (ICU), but is still controversial if the internal jugular vein access has a higher incidence of infection than subclavian or femoral vein access. OBJECTIVE: To compare catheter-related bloodstream infection (CABSI) rates between internal jugular and subclavian vein access in patients admitted to surgical wards. METHODS: This is a prospective, descriptive and comparative study of 114 central venous catheters placed in 96 patients admitted to the surgical wards of a tertiary-care hospital. The following parameters were studied: local of insertion of the catheter (internal jugular versus subclavian), number of lumens (single versus double) and duration of use (longer or shorter than 14 days), in order to determine their influence in CABSI rates. RESULTS: The CABSI rate was 9,64% (11 catheters), with no significant statistical differences regarding the number of lumens (p=0.274), and duration of use (p=0.156). The CABSI rate was higher in the subclavian vein than in the internal jugular vein access (OR 11.2, 95%CI 1.4-90.8; p=0.023). CONCLUSIONS: The internal jugular vein access has a lesser incidence of CABSI than subclavian vein access in patients admitted to surgical wards.

Resumo: Os autores apresentam um caso clínico de uma doente de 41 anos a quem foi efectuado o diagnóstico de sarcoidose com base em manifestações clínicas nasais e laríngeas. Os autores fazem uma breve revisão bibliográfica sobre as manifestações clínicas da sarcoidose em ORL, nomeadamente no que concerne ao diagnóstico, terapêutica e prognóstico desta entidade clínica.Rev Port Pneumol 2010; XVI (5): 829-835 Abstract: The authors present the case of a 41-year-old woman with nasal and laryngeal involvement by sarcoidosis, review the literature and discuss the otolaryngologic manifestations, the diagnostic evaluation, treatment and prognostic of this entity.Rev Port Pneumol 2010; XVI (5): 829-835 Palavras-chave: Sarcoidose, nasal, laringe, otorrinolaringologia, Key Words: Sarcoidosis, nasal, laryngeal, otolaryngologic manifestations

Os autores apresentam um caso clínico de uma doente de 41 anos a quem foi efectuado o diagnóstico de sarcoidose com base em manifestações clínicas nasais e laríngeas. Os autores fazem uma breve revisão bibliográfica sobre as manifestações clínicas da sarcoidose em ORL, nomeadamente no que concerne ao diagnóstico, terapêutica e prognóstico desta entidade clínica.The authors present the case of a 41-year-old woman with nasal and laryngeal involvement by sarcoidosis, review the literature and discuss the otolaryngologic manifestations, the diagnostic evaluation, treatment and prognostic of this entity.

As sinusites e rinites são processos inflamatórios da mucosa sinusal e nasal que, na população infantil, freqüentemente se sobrepõem e dificultam o correto diagnóstico. A prescrição de antibióticos para crianças com infecções virais como tentativa de impedir possíveis complicações bacterianas não tem se mostrado adequada. O tratamento antimicrobiano das rinossinusites, seja aguda ou crônica, geralmente é realizado de maneira empírica, baseado em dados microbiológicos (culturas e sensibilidade a antimicrobianos in vitro, etc.). As principais diferenças entre os tratamentos dizem respeito às doses e tempo de tratamento, mostrando uma grande divergência de idéias quanto à dose e período adequado, principalmente em se tratando de crianças. São necessários mais estudos para a definição destes itens e uma atualização do Consenso Brasileiro.

INTRODUÇÃO: A craniectomia descompressiva (CD) é técnica utilizada para tratamento da hipertensão intracraniana (HIC) pós-traumática. Sua indicação ainda não está bem definida na população pediátrica. OBJETIVO: Relatar a utilização desta técnica em sete casos pediátricos. MÉTODO: Estudo retrospectivo de sete pacientes (2 a 17 anos) que receberam CD unilateral para tratamento de HIC. Todos tiveram monitorização pós-operatória da pressão intracraniana (PIC) e a CD foi classificada em ultra-precoce (24h) de acordo com o seu tempo de realização após o trauma. O seguimento mínimo foi seis meses. RESULTADOS: Os pacientes foram seguidos por tomografia e quadro clínico, sendo classificados de acordo com a Escala de Outcome de Glasgow (GOS). Três pacientes faleceram (GOS1), um estava em estado vegetativo (GOS2), dois com déficit neurológico moderado (GOS3 e 4) e um com reabilitação funcional completa (GOS5) à época da alta hospitalar. Após período mínimo de seis meses, o paciente que estava em estado vegetativo e um dos que tinha déficit neurológico moderado melhoraram. Perdeu-se seguimento do paciente com alta em GOS4. Como complicação, ocorreram coleção subdural (2), hidrocefalia (1) e infecção superficial (1). Dos quatro que sobreviveram, dois receberam cranioplastia autóloga e os outros dois, heteróloga. CONCLUSÃO: A CD é método eficaz para redução da PIC, mas não é isenta de complicações. Sua aplicação ainda não está bem definida na população pediátrica, carecendo de estudos multicêntricos.INTRODUCTION: Decompressive craniectomy (DC) is a surgical technique used to treat patients with elevated intracranial pressure often found in head injury. Its indication remains a controversial issue in the pediatric population. OBJECTIVE: To report seven cases managed with this technique. Method: Retrospective study of seven patients, aged from 2 to 17 years, treated with unilateral DC due to increased intracranial pressure (ICP) as a consequence of head injury. All patients had ICP monitored post operatively and the DC classified as ultra-early (24h) according to the time of its application. The minimum follow-up was six months. RESULTS: Patients were evaluated with CT scans and clinical exams, and graded according the Glasgow Outcome Scale (GOS). Three patients deceased (GOS1), one was in vegetative state (GOS2), two recovered but still requiring nursing care (GOS3 and 4), and one had a full recovery (GOS5) at hospital discharge. After six months the GOS2 and a GOS3 patients achieved full recovery (GOS5). Subdural collection (2), hydrocephalus (1) and superficial infection (1) occurred as complication. Two patients had autologous cranioplasty and the other two heterologous cranioplasty. CONCLUSION: Decompressive craniectomy remains a feasible treatment method to lower the ICP, but is not safe from complications. A multicentric study should be done for appropriate protocol treatment of pediatric patients.

Apresenta-se uma ferramenta computacional denominada de AzimuthFinder, para funcionamento dentro do conjunto de programas do ArcGis®. O programa desenvolvido na linguagem Python tem por finalidade facilitar e otimizar a geração de tabelas de dados azimutais, a partir de lineamentos estruturais previamente traçados em imagens de satélite, fotografias aéreas ou mapas geológicos em meio digital. As características do AzimuthFinder permitem que, a critério do usuário, sejam geradas diferentes tabelas para o mesmo objeto de análise, dependendo do peso relativo atribuído aos lineamentos, por exemplo dando maior peso àqueles de traçado mais longo. Outra característica da ferramenta é a exportação dos dados no formato TXT, que é universal para vários tipos de programas, com formatação específica para softwares como o Stereo32, Win Tensor, OpenStereo e StereoNet 7, que por sua vez são softwares livres preparados para a confecção de diagramas de rosetas. Os testes com a ferramenta demonstraram que é bastante eficiente e rápida para a geração das tabelas azimutais, facilitando de maneira eficaz a confecção de diagramas de rosetas necessários à análise estrutural em áreas essencialmente submetidas à deformação frágil.

O condicionamento morfotectônico na evolução do relevo da Serra do Mar paranaense foi investigado a partir da análise de parâmetros geomorfométricos, geológicos e geográficos. Em cinco áreas com escarpamento associado a grandes lineamentos estruturais, foram verificadas morfoestruturas morfotectonicamente condicionadas. As escarpas estruturais, knickpoints alinhados segundo a direção de importantes estruturas, depósitos aluvionares segmentados por falhas, anomalias de drenagens, remanescentes de paleosuperfícies deformados e bacias suspensas apontaram para evidências que permitem concluir por deformações recentes superimpostas a morfoestruturas mais antigas na formação da paisagem, em especial associadas a estruturas com direções NNE-SSW e E-W. Essas evidências apontam para a atividade neotectônica na conformação do relevo regional.

O trabalho objetivou percorrer a constituição dos museus de ciências pelos séculos XVII ao XXI, sem a pretensão de esgotar o assunto, entendendo que essas instituições produzem discursos sobre a Ciência e a Educação. As mudanças mais evidentes nesses espaços dizem respeito ao acesso do público, à especialização temática, à forma de expor os objetos e à maneira de conceber a relação museu-público. O discurso científico veiculado por essas instituições remonta à superioridade da Ciência perante outros saberes, já o discurso pedagógico nesses espaços reflete uma concepção para além da educação escolarizada, e se associam à formação cultural dos indivíduos.