Evaluation of the adsorption process of remazol black b dye in liquid effluents by green coconut mesocarp

The textile industry is economically important for the development of Brazil. However, the generated effluents from this activity present a complex molecular structure that gives a recalcitrant characteristic in its residuary waters. Due to this reality, it is necessary to develop viable technologies that remove those compounds, which are mostly dyes. In this study, the green coconut mesocarp was used to remove Remazol Black B dye of an aqueous solution using the adsorption technique. To perform the experiments, the green coconut mesocarp was dried at 60ºC, ground in a grinding mill, sifted, washed with distilled water and immersed in albumin for 24 hours. The process of adsorption was optimized in a batch mode, containing 0.5 g of adsorbent and 25 mL of synthetic solution of 10 mg L -1, at 30ºC, pH 4.0, stirring speed of 700 rpm, and granulometry G ￡ 0.149 mm. Afterwards, the influence of the pH of the solution, adsorbent granulometry and stirring speed were evaluated by means of factorial planning. Experiments of equilibrium and kinetics of adsorption were conducted in Erlenmeyer. Results indicated that among the main effects, the pH and the adsorbent granulometry significantly influenced the process of adsorption. Besides, the adsorption equilibrium was reached in 60 minutes of contact. The Langmuir model was adjusted to experimental results (R 2=0.9953) being obtained a maximum capacity of adsorptionof 2.93 mgg-1 and equilibrium constant of 0.26 Lmg-1. With the obtained results it could be concluded that the green coconut mesocarp could be a viable alternative for the treatment of textile effluents

Fractographic and rheological characterizations of CF/PP-PE-copolymer composites tested in tensile

This work shows the fractographic study of fractured surfaces resulted from tensile tests of thermoplastic composites based on poly(propylene-co-ethylene) (PP-PE) and modified PP-PE copolymers reinforced with continuous carbon fibers (CF). The PP-PE matrix was modified with two agents called AM1 (based on maleic anhydride) and AM2 (containing an elastomeric agent), respectively. Three different laminates - CF/PP-PE, CF/PP-PE(AM1) and CF/PP-PE(AM2) were manufactured. The best tensile strength and elastic modulus results were determined for the CF/PP-PE(AM1) laminate (507.6 +/- 11.8 MPa and 54.7 +/- 2.4 GPa, respectively). These results show that the AM1 agent contributed to increase the physicochemical interaction between the CF and the PP-PE matrix. This condition provided a better loading transfer from matrix to the reinforcement. Scanning electron microscopy analyses of the fracture surfaces show the fractographic aspects of the samples and allow evaluating the fiber/matrix-interfacial adhesion. Poor adhesion is observed for the CF/PP-PE and CF/PP-PE(AM2) laminates with the presence of fiber impressions on the polymer rich regions and fiber surfaces totally unprotected of polymer matrix. On the other side, a more consistent adhesion is observed for the CF/PP-PE(AM1) laminate. This result is in agreement with the tensile test data and show the presence of a good interaction between the laminate constituents. The correlation of the mechanical and fractographic results with the curves of complex viscosity versus temperature of the studied polymer matrices shows that the matrix viscosity did not affect the wettability of the reinforcement.CNPqCAPES/PVNSUniv Fed Sao Paulo Unifesp, Inst Ciencia & Tecnol, Sao Jose Dos Campos, SP, BrazilITA, Div Engn Aeronaut & Mecan, Sao Jose Dos Campos, SP, BrazilUniv Fed Sao Carlos UFSCar, Ctr Ciencias Gestao & Tecnol, Sorocaba, SP, BrazilUniv Fed Sao Paulo Unifesp, Inst Ciencia & Tecnol, Sao Jose Dos Campos, SP, BrazilCNPq: 150697/2014-7CNPq: 142314/2010-2CNPq: 303287/2013-6Web of Scienc

The realities of additively manufactured concrete structures in practice

Extrusion-based 3D Concrete Printing (3DCP) is rapidly gaining popularity in the construction industry. Trial projects are now being realized at an increasing rate around the world to test the viability of the technology against real-world requirements. This step, from the ‘simple’ deposition of filaments of self-stable concrete to its application in buildings and structures, with all associated requirements and interfaces, comes with challenges. These range from matching the design intent to the manufacturing capabilities (through structural analysis and approval, and reinforcement) to quality consistency (robustness) on large scale, and compatibility with other materials. In many of these areas, much simply remains unknown due to a lack of experimental data or information from projects where 3DCP has been applied. This paper aims at reducing this knowledge gap by presenting a systematic discussion, based on the analyses of eight realized 3DCP projects from around the world. It was found that the structural application of printed concrete is limited, due to a lack of regulatory framework for expedient approval, as well as limited reinforcement options which require to resort to unreinforced masonry analogies. The application of the technology features a host of practical issues that relate to the print process, material, site conditions, building integration and design – or to the 3DCP technology in general. Although some potential risks, such as shrinkage cracking and quality consistency are generally recognized, the measures taken to mitigate them vary considerably, and are largely based on individual expertise. The actual effectiveness is generally unknown. Finally, it was observed that, while the printing itself is fast, the preparation time is generally considerable. This is partially due to a lack of knowledge amongst professionals. In the practical production of a 3DCP project, three expertise areas are crucial: one for the digital part, one for the machine side, and one for the material side. Thus there is a strong need for educational institutions to develop dedicated training courses and incorporate relevant topics into their curricula

Quality of life of patients with diabetes mellitus types 1 and 2 from a regerral health care center in Minas Gerais, Brazil

Quality of life (QoL) characteristics are important in patients with diabetes mellitus (DM 1 and 2). Aim: Evaluate QoL and DM-associated factors among diabetic patients. Methods: Patients attending a University Hospital interviewed about sociodemographic, clinical and QoL characteristics, with QoL measured via the EQ-5D. Descriptive analysis, correlation, linear regression, univariate and multivariate analysis were performed. Results: 346 patients took part, comprising 67% women, 59% with DM2, and 32% DM1. DM 1 patients had a mean QoL of 0.7369, with retinopathy, depression, dyslipidemia and a serious hypoglycemic crisis significantly reducing QoL. Patients with DM type 2 had mean QoL 0.6582, with hypertension, neuropathy, depression, cancer and dyslipidemia significantly reducing QoL. Reduced QoL also correlated with a lack of physical exercise. Males with both DM1 and 2 had a better QoL. Conclusion: Need for better disease monitoring and control combined with effective activities to improve self-care, reduce complications and improve patients’ QoL

PRODUÇÃO E VALOR NUTRITIVO DA CANARANA ERECTA LISA (Echinocloa piramidalis Lam.) EM RESPOSTA A INTERVALOS DE CORTE

O objetivo do estudo foi comparar e explicar as variações na produção e valor nutritivo do capim canarana erecta lisa (Echinocloa pyramidalis Lam.) em diferentes intervalos de corte. Os tratamentos corresponderam aos intervalos de corte de 20, 27, 34, 41, 48, 55, 62 e 69 dias. O delineamento utilizado foi o de blocos completos casualizados com três repetições, totalizando 24 unidades experimentais de 6m² (3m x 2m) cada. Foi avaliado a produção de forragem, altura do dossel e valor nutritivo da forragem colhida. A produção de forragem variou de 11,517 a 12,324 kg MS ha-1 e a altura dossel de 48,8 a 234 cm com menores valores quando o capim foi cortado no menor intervalo de corte. Os teores de fibra detergente neutro (FDN) variaram de 68,80 a 71,13%, fibra detergente ácido (FDA) de 36,20 a 44,15%; proteína bruta (PB) de 11,43 a 5,85%; e digestibilidade "in vitro" da matéria seca (DIVMS) de 65,3 a 47,42%, ou seja, foram reduzidos quando os pastos foram cortados em intervalos de corte mais longos. Recomenda-se o corte do capim aos 35 dias de rebrotação favorendo a produção, valor nutritivo e a digestibilidade da forragem. Palavras chaves: acúmulo de forragem, altura do dossel, digestibilidade, idades de rebrotação

Doença periodontal associada ao trauma oclusal: relato de caso

Introduction: Periodontal disease (PD) is a condition whose etiopathogenesis is oral bacterial biofilm associated with an immunoinflammatory response and causes destruction of periodontal tissues, which may be associated with occlusal trauma. Objective: This report aims to present a case of periodontal disease with occlusal trauma as a risk factor. Case Report: Female patient, 38 years old, non-smoker, without systemic involvement and without previous allergic condition, attended the specialization clinic of a periodontics course with the main complaint of compromised aesthetics by large anterior teeth, she says she feels become “tooth”. During clinical examination, presence of fixed appliance, protrusion and diastema of teeth in the anterior region, presence of dental and lingual biofilm, supra and subgingival calculus, bleeding on probing, mobility, loss of clinical attachment and average probing depth (PS) were verified. of 4mm on teeth 12, 11, 21 and 22. During the occlusal evaluation, premature contact was observed precisely on teeth 12, 11, 21 and 22, which characterizes as occlusal trauma that would be aggravating the mobility of the aforementioned teeth. Imaging exams indicated severe interproximal bone loss in the midline, the patient was diagnosed with chronic periodontal disease (PD), stage II, slow and generalized progression, the region of teeth 11, 21 (midline) stage III, progression slow and localized, configuring an area of greater severity of PD, and in teeth 12, 11, 21 and 22, PD is associated with occlusal trauma. The treatment plan indicated non-surgical scaling and root planing (RAR) sessions and 1 surgical RAR session, oral hygiene instructions and supportive periodontal therapy, as the patient does not have the clinical and economic conditions to carry out rehabilitation with implants. Conclusion: It is concluded from this report that a broad diagnosis is needed to identify coadjuvant factors in the progression of periodontal disease in order to achieve greater treatment efficacy and further studies are needed associating occlusal trauma with PD.Introducción: La enfermedad periodontal (EP) es una condición cuya etiopatogenia es el biofilm bacteriano bucal asociado a una respuesta inmunoinflamatoria y que provoca la destrucción de los tejidos periodontales, lo que puede estar asociado a un traumatismo oclusal. Objetivo: Este relato tiene como objetivo presentar un caso de enfermedad periodontal con trauma oclusal como factor de riesgo. Caso Clínico: Paciente del sexo femenino, 38 años, no fumadora, sin compromiso sistémico y sin padecimiento alérgico previo, acudió a la consulta de especialización de un curso de periodoncia con la principal queja de compromiso estético por dientes anteriores grandes, dice sentirse deformada ”. Durante el examen clínico se verificó presencia de aparatología fija, protrusión y diastema de dientes en la región anterior, presencia de biopelícula dentaria y lingual, cálculo supra y subgingival, sangrado al sondaje, movilidad, pérdida de inserción clínica y profundidad de sondaje (PS) promedio. . de 4mm en los dientes 12, 11, 21 y 22. Durante la evaluación oclusal se observó contacto prematuro precisamente en los dientes 12, 11, 21 y 22, lo que caracteriza un trauma oclusal que estaría agravando la movilidad de los dientes antes mencionados. Los exámenes de imagen indicaron pérdida ósea interproximal severa en la línea media, el paciente fue diagnosticado con enfermedad periodontal crónica (EP), estadio II, progresión lenta y generalizada, la región de los dientes 11, 21 (línea media) estadio III, progresión lenta y localizada, configurando zona de mayor severidad de la EP, y en los dientes 12, 11, 21 y 22 la EP se asocia a trauma oclusal. El plan de tratamiento indicaba sesiones de raspado y alisado radicular (RAR) no quirúrgico y 1 sesión de RAR quirúrgico, indicaciones de higiene bucal y terapia periodontal de apoyo, ya que el paciente no cuenta con las condiciones clínicas y económicas para realizar la rehabilitación con implantes. Conclusión: Se concluye de este informe que se necesita un diagnóstico amplio para identificar factores coadyuvantes en la progresión de la enfermedad periodontal para lograr una mayor eficacia del tratamiento y se necesitan más estudios que asocien el trauma oclusal con la EP.Introdução: A doença periodontal (DP) é uma condição que tem como etiopatogenia o biofilme bacteriano oral associado a resposta imunoinflamatória e causa destruição dos tecidos periodontais, que pode estar associado ao trauma oclusal. Objetivo: O presente relato tem como objetivo apresentar um caso de doença periodontal com o trauma oclusal como fator de risco.Relato de Caso: Paciente sexo feminino, parda, 38 anos, não fumante, sem comprometimento sistêmico e sem quadro alérgico prévio compareceu a clínica de especialização de um curso de periodontia com a queixa principal de estética comprometida por dentes anteriores avantajados, a mesma diz sentir-se “dentuça”. Durante exame clínico verificou-se presença de aparelho fixo, protusão e diastema dos dentes na região anterior, presença de biofilme dentário e lingual, cálculos supra e subgengivais, sangramento a sondagem, mobilidade, perda de inserção clínica e profundidade de sondagem (PS) média de 4mm nos dentes 12, 11, 21 e 22. Durante a avaliação oclusal observou-se contato prematuro justamente nos dentes 12, 11, 21 e 22 o que caracteriza como trauma oclusal que estaria agravando o quadro de mobilidade dos dentes supracitados. Os exames de imagem indicaram perda óssea interproximal severa na linha mediana, a paciente teve como diagnóstico de doença periodontal (DP) crônica, estágio II, progressão lenta e generalizada, sendo a região dos dentes 11, 21 (linha mediana) estágio III, progressão lenta e localizada, configurando uma área de maior gravidade da DP, sendo que nos dentes 12, 11, 21 e 22 a DP está associada ao trauma oclusal. No plano de tratamento foi indicado sessões de raspagem e alisamento radicular (RAR) não cirúrgico e 1 sessão RAR cirúrgica, instruções de higiene oral e terapia periodontal de suporte, pois paciente não tem condições clínicas e econômicas de realizar reabilitação com implantes. Conclusão: Conclui-se deste relato que é necessário um diagnóstico amplo que identifique fatores coadjuvantes na progressão da doença periodontal para assim alcançar maior eficácia de tratamento e são necessários mais estudos associando o trauma oclusal com a DP

Fixation of the short-term central venous catheter. A comparison of two techniques

Purpose: To compare the fixation of the central venous catheter (CVC) using two suture techniques. Methods: A clinical, analytical, interventional, longitudinal, prospective, controlled, single-blind and randomized study in adult, intensive care unit (ICU) patients. After admission and indication of CVC use, the patients were allocated to the Wing group (n = 35, catheter fixation with clamping wings and retainers) or Shoelace group (n = 35, catheter fixation using shoelace cross- tied sutures around the device). Displacement, kinking, fixation failure, hyperemia at the insertion site, purulent secretion, loss of the device, psychomotor agitation, mental confusion, and bacterial growth at the insertion site were evaluated. Results: Compared with the Wing group, the Shoelace group had a lower occurrence of catheter displacement (n = 0 versus n = 4p = 0.04), kinking (n = 0 versus n = 8p = 0.001), and fixation failure (n = 2 versus n = 8p = 0.018). No significant difference was found in bacterial growth (n = 20 versus n = 14p = 0.267) between groups. Conclusion: The Shoelace fixation technique presented fewer adverse events than the Wing fixation technique.Univ Vale Sapucai UNIVAS, Profess Masters Program Appl Hlth Sci, Pouso Alegre, MG, BrazilUniv Vale Sapucai, Profess Masters Program Appl Hlth Sci, Pouso Alegre, MG, BrazilUniv Vale Sapucai, Hosp Clin Samuel Libanio, Dept Cardiac Surg, Pouso Alegre, MG, BrazilUniv Vale Sapucai, Dept Biostat, Pouso Alegre, MG, BrazilUniv Vale Sapucai, Res Lab, Pouso Alegre, MG, BrazilUniv Vale Sapucai, Hosp Clin Samuel Libanio, Pouso Alegre, MG, BrazilUniv Vale Sapucai, Hosp Clin Samuel Libanio, Intens Care Dept, Pouso Alegre, MG, BrazilUniv Vale Sapucai, Pouso Alegre, MG, BrazilUniv Fed São Paulo UNIFESP, Div Plast Surg, São Paulo, BrazilUniv Fed São Paulo UNIFESP, Div Plast Surg, Dept Surg, São Paulo, BrazilUniv Fed São Paulo UNIFESP, Div Plast Surg, São Paulo, BrazilUniv Fed São Paulo UNIFESP, Div Plast Surg, Dept Surg, São Paulo, BrazilWeb of Scienc

Improved objective bayesian estimator for a PLP model hierarchically represented subject to competing risks under minimal repair regime

In this paper, we propose a hierarchical statistical model for a single repairable system subject to several failure modes (competing risks). The paper describes how complex engineered systems may be modelled hierarchically by use of Bayesian methods. It is also assumed that repairs are minimal and each failure mode has a power-law intensity. Our proposed model generalizes another one already presented in the literature and continues the study initiated by us in another published paper. Some properties of the new model are discussed. We conduct statistical inference under an objective Bayesian framework. A simulation study is carried out to investigate the efficiency of the proposed methods. Finally, our methodology is illustrated by two practical situations currently addressed in a project under development arising from a partnership between Petrobras and six research institutes