Operation
Mostrando 1-12 de 5494 artigos, teses e dissertações.
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1. Sedimentation and rheological behavior of reactive and non-reactive magnesium hydroxide pulps for industrial spray dryer processing
Abstract Two different reactive concentrated magnesium hydroxide (HM) pulps, produced in a lab reactor mill, and a synthetic and non-reactive HM-pulp, for comparative analyses, have been prepared and studied. Sodium polyacrylate was selected as a dispersant for improving the HM pulp fluidity, with concentrations varying from 0.42% to 2.0% on a dry basis. The
Cerâmica. Publicado em: 2023
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2. The environment in Petrobrás magazine (1961-1979): Meaning mobilized by corporate discourse
Abstract Purpose This study analyzes the ideological constructions of Petrobras’ corporate environmental discourse during the period from 1961 to 1979. Theoretical framework The paper uses Thompson’s (2011) critical conception of ideology, specifically its modes of operation and strategies of symbolic construction. Design/methodology/approach The stud
Revista Brasileira de Gestão de Negócios. Publicado em: 2023
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3. Operating Model and Estimation of the Insurance Premium for an Energy Futures Clearing House in Brazil
Abstract Purpose We propose and analyze a new operating model for an energy futures exchange that could be implemented in Brazil, where there is low liquidity for these contracts. The clearing house temporarily assumes the position of customers who fail to answer the margin call, instead of closing the position, as would normally be done under normal condit
Revista Brasileira de Gestão de Negócios. Publicado em: 2023
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4. Analgesic efficacy of Intraoperative lidocaine infusion in patients undergoing thyroidectomy
SUMMARY OBJECTIVE: A significant proportion of patients may experience moderate pain requiring treatment in the postoperative first 24 h following thyroidectomy. The aim of this study was to investigate the evaluation of postoperative patient-reported pain from intraoperative intravenous infusion of lidocaine in patients undergoing thyroidectomy surgery. M
Revista da Associação Médica Brasileira. Publicado em: 2023
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5. Syndecan-1 as a marker to predict acute kidney injury after isolated coronary artery bypass graft operations
SUMMARY OBJECTIVE: Postoperative acute kidney injury is an important problem that can occur after coronary artery bypass graft operations, and it is important to identify risky patient groups preoperatively. This study aimed to investigate the importance of preoperative syndecan-1 levels in predicting acute kidney injury after elective coronary artery bypas
Revista da Associação Médica Brasileira. Publicado em: 2023
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6. Outcomes Following Supracoronary Ascending Aortic Replacement with Aortic Valve Resuspension versus Modified Bentall's Operation for Acute Type A Aortic Dissection
Abstract Introduction: Type A acute aortic dissection (AAD) remains a challenging cardiac emergency despite the availability of various management strategies. This study compared the outcomes of supracoronary ascending aortic replacement (SCAAR) with aortic valve (AV) resuspension with those of modified Bentall's operation for type A AAD and the progression
Brazilian Journal of Cardiovascular Surgery. Publicado em: 2022
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7. DESIGN AND EXPERIMENT OF SELF-PROPELLED SYSTEM FOR PADDY FIELD WEEDER BASED ON THE INTERACTION MECHANISM OF WHEEL-SOIL
ABSTRACT Aiming at the low mechanization of paddy field weeding and lack of dedicated agricultural machinery for paddy field weeding in China, a self-propelled system of paddy field weeding machine was designed. The overall structure and working principle of self-propelled system were illustrated and analyzed. The interaction mechanism of wheel-soil during w
Engenharia Agrícola. Publicado em: 2022
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8. Analgesic effect of intercostal nerve block given preventively or at the end of operation in video-assisted thoracic surgery: a randomized clinical trial
Abstract Objective To compare the analgesic effect of intercostal nerve block (INB) with ropivacaine when given preventively or at the end of the operation in patients undergoing video-assisted thoracic surgery (VATS). Methods A total of 50 patients undergoing VATS were randomly divided into two groups. The patients in the preventive analgesia group (PR gr
Brazilian Journal of Anesthesiology. Publicado em: 2022
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9. The Effect of Low Tidal Volume Ventilation on Inflammatory Cytokines During Cardiopulmonary Bypass
Abstract Introduction: Halting ventilation during cardiopulmonary bypass (CPB) is implemented to operate in a less bleeding setting. It sustains a better visualization of the operation area and helps to perform the operation much more comfortably. On the other hand, it may lead to a series of postoperative lung complications such as atelectasis and pleural
Brazilian Journal of Cardiovascular Surgery. Publicado em: 2022
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10. Comparison of different local analgesia protocols in postoperative pain management after total knee arthroplasty
Abstract Objectives This study was to compare the effects of different local analgesia protocols on osteoarthritis patients undergoing total knee arthroplasty (TKA). Methods Medical records of 148 osteoarthritis patients who underwent unilateral TKA between October 2016 and October 2017 in our hospital were retrospectively analyzed. All these patients were
Brazilian Journal of Anesthesiology. Publicado em: 2022
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11. Performance analysis of the beneficiation process of bauxite from the Juruti Mine. Industrial sampling and performance evaluation
Abstract Sampling campaigns were conducted at the industrial bauxite wash circuit of the Juruti Bauxite Mine in Pará, Brazil. The beneficiation circuit consisted of crushing, scrubber washing, wet screening, hydrocyclone classification, and fltration. Considering laboratory processing of samples and statistical analyses of historical operation databases, ma
REM - International Engineering Journal. Publicado em: 2022
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12. Minimal Invasive Thoracoscopic Mitral Valve Surgery
ABSTRACT Introduction: The totally thoracoscopic approach for mitral valve (MV) disease is a minimally invasive method. We investigated the procedure’s feasibility, safety and effectiveness when it was performed by an experienced operator. Methods: We retrospectively analysed 96 consecutive patients with MV disease treated between March 2016 and November
Brazilian Journal of Cardiovascular Surgery. Publicado em: 2022