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  • 1
    Online Resource
    Online Resource
    Ciudad de México :Grupo Editorial Éxodo,
    Keywords: Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (312 pages)
    Language: Spanish
    Note: Física I -- Página legal -- Índice -- Prólogo -- Presentación -- Introducción -- Estudiante lo que debes saber -- Modelaje de la herramienta cognitiva -- Perfil de competencias -- Generalidades -- Importancia de la física -- Introducción -- La prehistoria -- La importancia de las mediciones -- Sistema de mediciones -- Filósofos precursores de la física -- Física -- Modelo, teorías y leyes -- El método científico -- Clasificación de la física -- Análisis dimensional -- Magnitudes físicas -- Conceptos de masa, fuerza y peso -- Unidades de fuerza y peso -- Problemas propuestos -- Álgebra vectorial -- Estática -- Fuerzas de contacto y a distancia -- Sistema de fuerzas -- Método del polígono -- Descomposición de una fuerza según dos direcciones -- Métodos analíticos -- Método analítico del triángulo (para dos vectores) -- Método analítico del paralelogramo (...) -- Problemas resueltos -- Problemas propuestos -- Definición de producto vectorial de dos vectores -- Examen 1 -- Examen 2 -- Cinemática -- Definición -- Movimiento rectilíneo uniforme (mru) -- Leyes del mru -- Estructura meso reticular -- Problemas resueltos -- Problemas propuestos -- El movimiento variado o uniformemente variado -- Problema resueltos -- Problemas propuestos -- Caida libre -- Problemas resueltos -- Problemas propuestos -- Tiro vertical -- Problemas resueltos -- Problemas propuestos -- Tiro horizontal -- Problemas resueltos -- Problemas propuestos -- Tiro parabólico -- Problemas resueltos -- Problemas propuestos -- Examen 1 -- Examen 2 -- Movimiento circular uniforme -- Fuerza centrípeta -- Fuerza centrífuga -- Problemas resueltos -- Problemas propuestos -- Movimiento circular uniformemente variado mcuv -- Problemas resueltos -- Problemas propuestos -- Examen 1 -- Examen 2 -- Dinámica -- Estudiante, lo que debes saber -- Dinámica -- Unidades de fuerza y peso. , Las leyes del movimiento de newton -- Primera ley de newton (equilibrio) (...) -- Segunda ley de newton (...) -- Tercera ley de newton (acción y reacción) -- Problemas con solución de newton -- Problemas resueltos -- Problemas propuestos -- Gravitación universal -- Problemas resueltos -- Problemas propuestos -- Leyes de kepler -- Rozamiento -- Problemas resueltos -- Problemas propuestos -- Trabajo, energía y potencia -- Energía y formas de energía -- Energía -- Potencia -- Equivalente mecánico del calor -- Problemas resueltos -- Problemas propuestos -- Examen 1 -- Examen 2 -- Transformaciones y formularios -- Bibliografia.
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  • 2
    Online Resource
    Online Resource
    Wageningen :Wageningen Academic Publishers,
    Keywords: Electronic books.
    Description / Table of Contents: This book is a contribution of the authors to the food - fuel debate. During 2007 and 2008 several factors led to the food inflation problem: growing population, income distribution, urbanization, biofuel, social programs, production scarcity etc.. Biofuel got most of the blame for food inflation but its responsibility was only limited. There are several possibilities of solving the food inflation problem that are discussed this book. It explores the example of Brazil's agricultural sector, where a quiet revolution occurred in the last 15 years. This development is leading to Brazil becoming one of the largest food exporters globally. This position will strengthen as an additional 100 million hectares becomes available for crop development. The second part of the book explores the basics of the sugar cane chain. Sugar cane occupies less than 2% of Brazilian arable land and supplies 50% of Brazilian car fuel. In 2010 Brazil produced 53% of the world's sugar. Sugar cane produces sugar, ethanol (used as car fuel), biogases that are used to co-generate electricity and other by-products. Biofuel is a booming industry. New technologies allow production of diesel and other fuels from cane. Sugar cane ethanol is the only renewable fuel that can currently compete with gasoline. Coca Cola just launched the plastic bottle with sugar cane plastic. This book helps us to understand Brazilian agribusiness and sugar cane economics from various perspectives e.g. international investments, sustainability, future trends and the strategic plan for the Brazilian industry.
    Type of Medium: Online Resource
    Pages: 1 online resource (148 pages)
    Edition: 1st ed.
    ISBN: 9789086867219
    Language: English
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  • 3
    Online Resource
    Online Resource
    Wageningen :Wageningen Academic Publishers,
    Keywords: Agriculture -- Economic aspects -- Brazil. ; Electronic books.
    Description / Table of Contents: This book is a contribution of the authors to the food - fuel debate. During 2007 and 2008 several factors led to the food inflation problem: growing population, income distribution, urbanization, biofuel, social programs, production scarcity etc.. Biofuel got most of the blame for food inflation but its responsibility was only limited. There are several possibilities of solving the food inflation problem that are discussed this book. It explores the example of Brazil's agricultural sector, where a quiet revolution occurred in the last 15 years. This development is leading to Brazil becoming one of the largest food exporters globally. This position will strengthen as an additional 100 million hectares becomes available for crop development. The second part of the book explores the basics of the sugar cane chain. Sugar cane occupies less than 2% of Brazilian arable land and supplies 50% of Brazilian car fuel. In 2010 Brazil produced 53% of the world's sugar. Sugar cane produces sugar, ethanol (used as car fuel), biogases that are used to co-generate electricity and other by-products. Biofuel is a booming industry. New technologies allow production of diesel and other fuels from cane. Sugar cane ethanol is the only renewable fuel that can currently compete with gasoline. Coca Cola just launched the plastic bottle with sugar cane plastic. This book helps us to understand Brazilian agribusiness and sugar cane economics from various perspectives e.g. international investments, sustainability, future trends and the strategic plan for the Brazilian industry.
    Type of Medium: Online Resource
    Pages: 1 online resource (138 pages)
    Edition: 1st ed.
    ISBN: 9789086867219
    DDC: 570
    Language: English
    Note: Intro -- Food and fuel -- Table of contents -- Introduction -- 1. The need for food and fuel production and the role of Brazilian agribusiness -- 1.1 The global economic/financial crisis -- 1.2 Food demand and food inflation -- 1.3 The road to addressing increased food demand and food inflation -- 1.4 Background and overview of Brazil's agricultural production -- 1.5 The importance of agribusiness for the Brazilian economy -- 1.6 The scenario for TNC investments: trends and global issues -- 1.6.1 The political-legal environment for investments in Brazil -- 1.6.2 The economic and natural environment for investments in Brazil -- 1.6.3 The socio-cultural environment for investments in Brazil -- 1.6.4 The technological environment for investments in Brazil -- 2. The sugar-energy value chain in Brazil -- 2.1 The sugar-energy supply chain -- 2.2 The sugar-ethanol evolution in Brazil -- 2.2.1 The sugar evolution in Brazil -- 2.2.2 The ethanol evolution in Brazil -- 2.3 Mapping and quantification of the sugar-energy supply chain in Brazil2 -- 2.4 Pre-farm statistics -- 2.4.1 Agricultural inputs -- 2.5 On-farm statistics: sugarcane production -- 2.6 Post-farm statistics -- 2.6.1 Equipment, industrial services, and supplies -- 2.6.2 Sugar mills and ethanol plants -- 2.6.3 Ethanol -- 2.6.4 Wholesale distributors and service stations -- 2.6.5 Sugar -- 2.6.6 Wholesale and retail -- 2.6.7 Bioelectricity -- 2.6.8 Yeast -- 2.6.9 Carbon credits -- 2.6.10 Bioplastics -- 2.7 Facilitating agents -- 2.7.1 Brazilian development bank (BNDES) -- 2.7.2 Outsourcing of cutting, loading, and transportation of sugarcane (CLT) -- 2.7.3 Sugar and ethanol road freight export -- 2.7.4 Tolls (road fees) for sugar and ethanol exportation -- 2.7.5 Cost at port (Port of Santos) -- 2.7.6 Research & -- development (R& -- D) -- 2.7.7 Events -- 2.7.8 Specialty magazines. , 2.7.9 Health care and meals -- 2.7.10 Wage bill/jobs -- 2.7.11 Taxes -- 2.8 Managerial implications and discussion -- 3. Strategic plan for the sugar-energy value chain in Brazil -- 3.1 Introduction -- 3.1.1 Political-legal factors -- 3.1.2 Economic-natural factors -- 3.1.3 Socio-cultural factors -- 3.1.4 Technological factors -- 3.1.5 Strategic planning process -- 3.2 An application of the CHAINPLAN method -- 3.3 Understanding -- 3.4 External analysis: opportunities and threats -- 3.4.1 Biofuel drivers for investments in Brazil -- 3.5 Internal analysis: strengths and weaknesses -- 3.6 Objectives (goals) of the plan -- 3.7 Main strategies -- 3.8 Projects and decisions related to production, products, research, development, and innovation -- 3.9 Projects and decisions related to communication -- 3.10 Projects and decisions related to distribution and logistics -- 3.11 Projects and decisions related to training -- 3.12 Projects and decisions related to coordination and adequacy of the institutional environment -- 3.13 Conclusions -- 4. An overview of FDI in the sugar-energy sector in Brazil and lessons learned -- 4.1 Characterisation of the largest groups in the sugar-energy sector -- 4.2 The institutional and regulatory framework -- 4.3 The growth strategies in the sugar-energy sector -- 4.4 The role of investment funds (private equity) -- 4.5 Financing (leverage debt equity) -- 4.6 Corporate social responsibility -- 4.7 Environmental regulations and trends -- 5. Concluding remarks - FDI: suggestions for regulations, public policies, and incentives -- 5.1 How to evaluate the capacity of international investment to generate the regional development -- 5.2 How to promote and regulate international investments -- 5.3 A strategy for international investments -- 5.4 Planning strategies for 2010-2020 -- 5.5 Final discussion -- References and websites. , Annex 1. Most relevant M& -- A operations from 2007 to 2010. -- About the authors -- Keyword index.
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  • 4
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Keywords: Environmental sciences. ; Electronic books.
    Description / Table of Contents: In addition to detailing the latest techniques for evaluating electrodialysis processes, this volume assesses the potential applications of the membrane process in treating industrial effluent. The text draws on a decade of research in this high-profile field.
    Type of Medium: Online Resource
    Pages: 1 online resource (144 pages)
    Edition: 1st ed.
    ISBN: 9783642402494
    Series Statement: Topics in Mining, Metallurgy and Materials Engineering Series
    DDC: 363.728
    Language: English
    Note: Intro -- Preface -- Contents -- 307669_1_En_1_Chapter_OnlinePDF -- 1 Introduction -- 2 General Aspects of Membrane Separation Processes -- Abstract -- 2.1…Water and Wastewater Treatment for Reuse -- 2.2…Membrane Separation Processes -- 2.3…Electrodialysis as an Alternative for Reverse Osmosis -- References -- 3 General Aspects of Electrodialysis -- Abstract -- 3.1…Introduction -- 3.2…Assembling an Electrodialysis System -- 3.2.1 Membranes -- 3.2.2 Spacers -- 3.2.3 Electrodes and Electrode Reactions -- 3.3…Fouling and Scaling in Electrodialysis -- 3.4…Electrodialysis Reversal -- 3.5…Evaluation of the Process Efficiency -- 3.5.1 Percent Extraction -- 3.5.2 Current Efficiency -- 3.6…Electrodialysis Process Costs -- References -- 4 Electrodialysis Control Parameters -- Abstract -- 4.1…Membrane Permselectivity and Transport Number -- 4.2…Concentration Polarization and Limiting Current Density -- 4.3…Phenomena Accompanying Concentration Polarization -- 4.3.1 Water Dissociation and Exaltation Effects -- 4.3.2 Gravitational Convection -- 4.3.3 Electro-Convection -- 4.4…Chronopotentiometry -- 4.4.1 Principle -- 4.4.2 Applications -- 4.4.2.1 Limiting Current Density -- 4.4.2.2 Transport Number of Ions Through the Membrane -- 4.4.2.3 Heterogeneity of Membranes. Conductive and Non-conductive Regions -- 4.4.2.4 Fouling by Organic Molecules and Mineral Deposits -- 4.4.2.5 Side Effects Associated with Concentration Polarization -- 4.4.2.6 Transport Properties for Bipolar Membranes -- References -- 5 Ionic Membranes -- Abstract -- 5.1…Membrane Materials -- 5.1.1 Polymer Intrinsically Conducting (PICs) Membranes -- 5.1.1.1 Membranes Obtained by In Situ Polymerization -- 5.1.1.2 Membrane Obtained Through PICs and Conventional Polymer Mixture -- 5.1.1.3 Membrane Obtained by Interpenetrating Polymer Nets -- 5.2…Membrane Characterization. , 5.2.1 Heterogeneous Ion Exchange Membranes -- 5.2.2 Homogeneous Ion Exchange Membrane -- 5.2.3 Special Membranes -- 5.3…Membrane Properties -- 5.3.1 Permselectivity of Membranes -- 5.3.2 Mechanical Properties of Membranes -- 5.3.3 Chemical Stability of Membranes -- 5.3.4 Electrical Resistance of Membranes -- 5.3.5 Ion Exchange Capacities of Membranes -- 5.4…Electrodialysis Membranes -- 5.4.1 Preparation of Homogeneous Ion Exchange Membranes -- 5.4.2 Preparation of Heterogeneous Ion Exchange Membranes -- References -- 6 Electrodialysis in Water Treatment -- Abstract -- 6.1…Introduction -- 6.2…Water Quality -- 6.3…Conventional Drinking Water Treatment System -- 6.4…Membrane Processes Applied to Drinking Water Production -- 6.5…Electrodialysis Applied to the Desalination and Purification of Brackish Water -- 6.6…Electrodialysis Aapplied to Nitrate Contaminated Potable Water -- 6.7…Concluding Remarks -- References -- 7 Electrodialysis Treatment of Refinery Wastewater -- Abstract -- 7.1…Water Use and Wastewater Generation in Refineries -- 7.2…Conventional Wastewater Treatment in Refineries -- 7.2.1 Preliminary Treatment -- 7.2.2 Primary Treatment -- 7.2.3 Secondary Treatment -- 7.3…Electrodialysis to Process Water Production -- 7.4…Comparison of Electrodialysis Reversal and Reverse Osmosis -- 7.5…Water Pretreatment for Electrodialysis Reversal -- 7.6…Energy Consumption -- 7.7…Operational Control and Maintenance -- 7.8…Concluding Remarks -- References -- 8 Electrodialysis Treatment of Tannery Wastewater -- Abstract -- 8.1…Introduction -- 8.2…Generation of Effluents in Tanneries -- 8.3…Tannery Wastewater Characteristics -- 8.4…Conventional Tannery Wastewater Treatment -- 8.5…Electrodialysis to Process Wastewater -- 8.6…Concluding Remarks -- References -- 9 Electrodialysis Treatment of Phosphate Solutions -- Abstract -- 9.1…Introduction. , 9.2…The use of Phosphate Solutions in the Metal-Mechanics Industry -- 9.3…Conventional Phosphate Wastewater Treatment -- 9.4…Electrodialysis in the Water Purification Process -- 9.5…Fouling and Scaling in Phosphating Wastewater Treatment -- 9.6…Concluding Remarks -- References -- 10 Electrodialysis for the Recovery of Hexavalent Chromium Solutions -- Abstract -- 10.1…Introduction -- 10.2…The Use of Hexavalent Chromium in the Electroplating Processes -- 10.3…Characteristics and Contaminants of Hexavalent Chromium Solutions -- 10.4…Conventional Treatment of Hexavalent Chromium Solutions -- 10.5…Electrodialysis for the Recovery of Water and Chromium Solutions -- 10.6…Concluding Remarks -- References -- 11 Electrodialysis Treatment of Metal-Cyanide Complexes -- Abstract -- 11.1…Introduction -- 11.2…The Transport of Metal Cyanide Complexes Through Ion Exchange Membranes -- 11.3…Solutions of Zinc Cyanide Complexes -- 11.4…The Transport of Zinc Cyanide Complexes Through Ion Exchange Membranes -- 11.5…Solutions of Cadmium Cyanide Complexes -- 11.6…The Transport of Cadmium Cyanide Complexes Through Ion Exchange Membranes -- 11.7…Influence of the Presence of Other Metallic Ions (Copper, Iron, Chromium) -- 11.8…Concluding Remarks -- References -- 12 Electrodialysis Treatment of Nickel Wastewater -- Abstract -- 12.1…Introduction -- 12.2…The Use of Nickel in Electroplating Processes -- 12.3…Conventional Nickel Wastewater Treatment -- 12.4…Electrodialysis for Water and Nickel Recovery -- 12.5…Concluding Remarks -- References.
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  • 5
    Online Resource
    Online Resource
    New York, NY :Springer,
    Keywords: Artificial intelligence -- Data processing. ; Games -- Data processing. ; Electronic books.
    Description / Table of Contents: This reviews the integration of current academic AI techniques into electronic entertainment games, including pathfinding, decision making, learning complex behavior, and the latest real-time search methods, all aimed at closer interaction with the player.
    Type of Medium: Online Resource
    Pages: 1 online resource (210 pages)
    Edition: 1st ed.
    ISBN: 9781441981882
    Language: English
    Note: Intro -- Artificial Intelligence for Computer Games -- Preface -- Contents -- Contributors -- Real-Time Heuristic Search for Pathfinding in Video Games -- Embedding Information into Game Worlds to Improve Interactive Intelligence -- Empowering Designers with Libraries of Self-Validated Query-Enabled Behaviour Trees -- Game AI for Domination Games -- Case-Based Reasoning and User-Generated Artificial Intelligence for Real-Time Strategy Games -- Game AI as Storytelling -- Intelligent Machinima Generation for Visual Storytelling -- Intelligent Adaptive Lighting -- Index.
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  • 6
    Online Resource
    Online Resource
    Ciudad de México :Grupo Editorial Éxodo,
    Keywords: Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (473 pages)
    Language: Spanish
    Note: FÍSICA MODERNA I: ESTÁTICA Y CINEMÁTICA (...) -- PÁGINA LEGAL -- ÍNDICE -- PRÓLOGO -- PRESENTACIÓN -- INTRODUCCIÓN -- MÉTODOS DIDÁCTICOS -- SOLUCIÓN DE PROBLEMAS -- BREVE EXPLICACIÓN DEL ORIGEN DE LA FÍSICA -- IMPORTANCIA DE LA FÍSICA -- LA IMPORTANCIA DE LAS MEDICIONES -- SISTEMAS DE MEDICIONES -- FILÓSOFOS PRECURSORES DE LA FÍSICA -- PERSONAJES QUE FUNDAMENTARON LAS LEYES (...) -- UNIDAD I FÍSICA -- MODELOS, TEORÍA Y LEYES -- EL MÉTODO CIENTÍFICO -- CLASIFICACIÓN DE LA FÍSICA -- DEFINICIÓN DE TEMAS DE LA FÍSICA -- ANÁLISIS DIMENSIONAL -- MAGNITUDES FÍSICAS -- CARACTERÍSTICAS DE UN VECTOR -- MÉTODOS GRÁFICOS -- EJERCICIOS DE MAGNITUDES -- CONCEPTO DE MASA, FUERZA U PESO -- UNIDAD II ALGEBRA VECTORIAL -- DEFINICIÓN -- FUERZAS EN CONTACTO Y A DISTANCIA -- MÉTODOS ANALÍTICOS -- PROBLEMAS RESUELTOS DE ANÁLISIS VECTORIAL -- PROBLEMAS PROPUESTOS DE ANÁLISIS VECTORIAL -- DEFINICIÓN DE PRODUCTO ESCALAR DE DOS VECTORES -- PRODUCTO VECTORIAL DE DOS VECTORES -- MOMENTO O TORCA -- CONDICIONES DE EQUILIBRIO -- PROBLEMAS RESUELTOS DE CONDICIONES DE MOMENTOS -- PROBLEMAS DE TENSIONES -- PROBLEMAS DE TENSIONES Y CONDICIONES DE (...) -- PROBLEMAS PROPUESTOS DE MOMENTOS, TENSIONES (...) -- CENTRO DE GRAVEDAD -- ECUACIONES DE DINÁMICA DE ROTACIÓN -- IMPULSO ANGULAR -- CENTROIDE -- PROBLEMAS RESUELTOS DE CENTROIDES -- PROBLEMAS PROPUESTOS DE CENTROIDES -- EXÁMENES PARA 1º DEPARTAMENTAL EXAMEN 1 -- EXÁMENES PARA 2º DEPARTAMENTAL EXAMEN 2 -- UNIDAD III CINEMÁTICA -- DEFINICIÓN -- MOVIMIENTO RECTILÍNEO UNIFORME MRU -- PROBLEMAS CON SOLUCIÓN DE MRU -- PROBLEMAS PROPUESTOS DE MRU -- EL MOVIMIENTO VARIADO O UNIFORMEMENTE VARIADO -- PROBLEMAS CON SOLUCIÓN DE MRUV -- PROBLEMAS PROPUESTOS DE MRUV -- CAÍDA LIBRE -- PROBLEMAS RESUELTOS DE CL -- PROBLEMAS PROPUESTOS DE CL -- TIRO VERTICAL -- PROBLEMAS RESUELTOS DE TV -- PROBLEMAS PROPUESTOS DE TV -- TIRO HORIZONTAL. , PROBLEMAS RESUELTOS DE TH -- PROBLEMAS PROPUESTOS DE TH -- TIRO PARABÓLICO -- PROBLEMAS RESUELTOS DE TIRO PARABÓLICO (...) -- PROBLEMAS PROPUESTOS DE TP -- EXÁMENES PARA 2º DEPARTAMENTAL EXAMEN 1 -- EXÁMENES PARA 2º DEPARTAMENTAL EXAMEN 2 -- UNIDAD IV MOVIMIENTO CIRCULAR UNIFORME -- DEFINICIÓN -- FUERZA CENTRÍPETA -- FUERZA CENTRIFUGA -- PROBLEMAS RESUELTOS DE MCU -- PROBLEMAS PROPUESTOS DE MCU -- MOVIMIENTO CIRCULAR UNIFORMEMENTE VARIADO -- PROBLEMAS RESUELTOS DE MCUV. -- PROBLEMAS PROPUESTOS DE MCUV -- PROBLEMAS PROPUESTOS DE MCUV CON SOLUCIÓN -- MOVIMIENTO ARMÓNICO SIMPLE -- PROBLEMAS CON SOLUCIÓN DE MAS -- PROBLEMAS PROPUESTOS DE MAS -- EXÁMENES PARA 3º DEPARTAMENTAL EXAMEN 1 -- EXÁMENES PARA 3º DEPARTAMENTAL EXAMEN 2 -- MODELOS MATEMÁTICOS -- BIBLIOGRAFÍA.
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  • 7
    Publication Date: 2013-01-23
    Description: High heat flow and ocean acidification at a nascent rift in the northern Gulf of California Nature Communications 4, 1388 (2013). doi:10.1038/ncomms2390 Authors: Rosa Ma Prol-Ledesma, Marco-Antonio Torres-Vera, Riccardo Rodolfo-Metalpa, Catalina Ángeles, Carlos H. Lechuga Deveze, Ruth Esther Villanueva-Estrada, Evgueni Shumilin & Carlos Robinson
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2013-02-27
    Description: ABSTRACT The aim of the present study was to evaluate the efficacy of QMiX, SmearClear, and 17% EDTA for the debris and smear layer removal from the root canal and its effects on the push-out bond strength of an epoxy-based sealer by scanning electron microscopy (SEM). Forty extracted human canines ( n  = 10) were assigned to the following final rinse protocols: G1-distilled water (control), G2–17% EDTA, G3-SmearClear, and G4-QMiX. The specimens were submitted to a SEM analysis to evaluate the presence of debris and smear layer, respectively, in the apical or cervical segments. In sequence, forty extracted human maxillary canines with the root canals instrumented were divided into four groups ( n  = 10) similar to the SEM analysis study. After the filling with AH Plus, the roots were transversally sectioned to obtain dentinal slices. The specimens were submitted to a push-out bond strength test using an electromechanical testing machine. The statistical analysis for the SEM and push-out bond strength studies were performed using the Kruskal–Wallis and Dunn tests ( α  = 5%). There was no difference among the G2, G3, and G4 efficacy in removing the debris and smear layer ( P  〉 0.05). The efficacy of these groups was superior to the control group. The push-out bond strength values of G2, G3, and G4 were superior to the control group. The ability to remove the debris and smear layer by SmearClear and QMiX was as effective as the 17% EDTA. The final rinse with these solutions promoted similar push-out bond strength values. Microsc. Res. Tech., 2013 . © 2013 Wiley Periodicals, Inc.
    Print ISSN: 1059-910X
    Electronic ISSN: 1097-0029
    Topics: Natural Sciences in General
    Published by Wiley-Blackwell
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  • 9
    Publication Date: 2012-03-02
    Description: Based on the fact that vitamin A in clinical doses is a potent pro-oxidant agent to the lungs, we investigated here the role of nitric oxide (NO • ) in the disturbances affecting the lung redox environment in vitamin A-treated rats (retinol palmitate, doses of 1000–9000 IU·kg –1 ·day –1 ) for 28 days. Lung mitochondrial function and redox parameters, such as lipid peroxidation, protein carbonylation and the level of 3-nytrotyrosine, were quantified. We observed, for the first time, that vitamin A supplementation increases the levels of 3-nytrotyrosine in rat lung mitochondria. To determine whether nitric oxide (NO •) or its derivatives such as peroxynitrite (ONOO-) was involved in this damage, animals were co-treated with the nitric oxide synthase inhibitor L-NAME (30 mg·kg –1 , four times a week), and we analysed if this treatment prevented (or minimized) the biochemical disturbances resulting from vitamin A supplementation. We observed that L-NAME inhibited some effects caused by vitamin A supplementation. Nonetheless, L-NAME was not able to reverse completely the negative effects triggered by vitamin A supplementation, indicating that other factors rather than only NO• or ONOO- exert a prominent role in mediating the redox effects in the lung of rats that received vitamin A supplementation. Copyright © 2011 John Wiley & Sons, Ltd.
    Print ISSN: 0263-6484
    Electronic ISSN: 1099-0844
    Topics: Biology , Medicine
    Published by Wiley-Blackwell
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  • 10
    Publication Date: 2012-04-20
    Description: The aim of this study was to evaluate the penetration of endodontic sealer into the dentin tubules, the integrity of the sealer layer perimeter, and the sealer area at the apical third after different filling techniques by confocal laser scanning microscopy (CLSM). Forty-five mandibular premolars were mechanically prepared with ProTaper files, until F5 file. Thereafter, they were filled with an epoxy-resin sealer (AH Plus) mixed with Rhodamine B dye (0.1% proportion) and allocated in three groups: Group 1, single master cone; Group 2, cold lateral compaction; and Group 3, Thermafil. For confocal laser scanning microscopy analysis, the specimens were transversely sectioned at 4 mm from the apex. The images at ×10 and ×40 were analyzed by Imagetool 3.0 software. Significant differences were not found among the three experimental groups according the dentin-impregnate area by the sealer ( P = 0.68) and between the sealer and root canal perimeter ( P = 0.18). However, root canal filling techniques were significantly different when apical sealer areas were compared ( P = 0.001). Thermafil group showed smaller sealer areas (8.09%) while cold lateral compaction and gutta-percha master cone showed similar areas (17.37 and 21.18%, respectively). The dentin-impregnated area was not dependent on the root canal filling technique. Single master cone, cold lateral condensation and Thermafil techniques presented integrity of the sealer perimeter close to 100% and Thermafil resulted in a significantly thinner sealer layer. Microsc. Res. Tech. 2012. © 2012 Wiley Periodicals, Inc.
    Print ISSN: 1059-910X
    Electronic ISSN: 1097-0029
    Topics: Natural Sciences in General
    Published by Wiley-Blackwell
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