Gotowe bibliografie tematyczne / Adequate gas exchange

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Gotowa bibliografia na temat „Adequate gas exchange”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Adequate gas exchange"

Wong, Kevin A., Ather Bano, Anita Rigaux, et al. "Pulmonary vagal innervation is required to establish adequate alveolar ventilation in the newborn lamb." Journal of Applied Physiology 85, no. 3 (1998): 849–59. http://dx.doi.org/10.1152/jappl.1998.85.3.849.

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To investigate the effects of bilateral intrathoracic vagotomy on the establishment of continuous breathing and effective gas exchange at birth, we studied 8 chronically instrumented, unanesthetized, sham-operated and 14 vagotomized newborn lambs after a spontaneous, unassisted vaginal delivery. Fetal lambs were instrumented in utero to record sleep states, diaphragmatic electromyogram, blood pressure, arterial pH, and blood-gas tensions. Six of eight sham-operated lambs established effective gas exchange within 10 min of birth, whereas 12 of 14 vagotomized animals developed respiratory acidos

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Aleksandrovich, Yu S., S. B. Dalzhinova, K. V. Pshenisnov, and I. V. Aleksandrovich. "Non-invasive ventilation provides adequate gas exchange minimizing pulmonary and extrapulmonary complications." Messenger of ANESTHESIOLOGY AND RESUSCITATION 17, no. 6 (2020): 22–30. http://dx.doi.org/10.21292/2078-5658-2020-17-6-22-30.

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Chung, Mabel, Ariel L. Shiloh, and Anthony Carlese. "Monitoring of the Adult Patient on Venoarterial Extracorporeal Membrane Oxygenation." Scientific World Journal 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/393258.

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Venoarterial extracorporeal membrane oxygenation (VA ECMO) provides mechanical support to the patient with cardiac or cardiopulmonary failure. This paper reviews the physiology of VA ECMO including the determinants of ECMO flow and gas exchange. The efficacy of this therapy may be determined by assessing patient hemodynamics and device flow, overall gas exchange support, markers of adequate oxygen delivery, and pulsatility of the arterial blood pressure waveform.

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Hasibuan, Sri Rahayu, Mayza Hanif Abbad Mahardika, Adnan Dahiya Addaruqutni, and Fitri Kartiasih. "Determination of macroeconomic factors on Indonesia's oil and gas imports: an ECM approach." Journal of Economics Research and Policy Studies 5, no. 2 (2025): 303–21. https://doi.org/10.53088/jerps.v5i2.1693.

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The oil and gas trade deficit can negatively impact Indonesia’s economy in the long term, highlighting the need to identify key factors influencing oil and gas imports. This study analyzes the effects of inflation, exchange rates, and foreign exchange reserves on oil and gas imports using the Error Correction Model (ECM), which captures both short-term and long-term dynamics. Monthly data from January 2003 to December 2023 were used, with a natural logarithm transformation applied to address non-stationarity. The results show that, in the long term, inflation and foreign exchange reserves sign

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Agusti, AG, and R. Rodriguez-Roisin. "Effect of pulmonary hypertension on gas exchange." European Respiratory Journal 6, no. 9 (1993): 1371–77. http://dx.doi.org/10.1183/09031936.93.06091371.

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This paper reviews the effects of pulmonary artery hypertension on gas exchange by exploring three different issues, namely: 1) how does gas exchange behave in diseases characterized by increased vascular tone (primary pulmonary hypertension (PPH), chronic obstructive pulmonary disease (COPD) and interstitial pulmonary fibrosis (IPF)) or decreased vascular tone ("hepatopulmonary syndrome"); 2) how does exercise, as a non-pharmacological tool of increasing pulmonary blood flow, modify gas exchange in these diseases; and 3) how do several drugs that lower (vasodilators) or increase (almitrine) t

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Calderón, M., R. Verdín, J. Galván, et al. "Low Flow Veno-Venous ECMO: An Experimental Study." Journal of ExtraCorporeal Technology 26, no. 2 (1994): 75–78. http://dx.doi.org/10.1051/ject/199426275.

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Clinical use of extracorporeal membrane oxygenation (ECMO) and carbon dioxide removal (ECCO2R) have become well established techniques for the treatment of severe respiratory failure; however they require full cardiopulmonary bypass, representing major procedures with high morbidity. We theorized the possibility of an efficient low flow venavenous extracorporeal membrane gas exchange method. Four mongrel 12kg dogs were submitted to vena-venous extracorporeal membrane gas exchange via a jugular dialysis catheter using a low flow (10 ml/min) roller pump and a membrane oxygenator for a period of

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Wünsche, Jens N., and John W. Palmer. "Portable Through-flow Cuvette System for Measuring Whole-canopy Gas Exchange of Apple Trees in the Field." HortScience 32, no. 4 (1997): 653–58. http://dx.doi.org/10.21273/hortsci.32.4.653.

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A monitoring and control system for sequentially measuring whole-tree-canopy gas exchange of four apple (Malus domestica Borkh.) trees in the field is described. A portable, highly transparent, open-top whole-canopy cuvette was developed for complete enclosure of the above-ground portion of the tree. The flux of whole-canopy CO2 and H2 0 vapor was estimated from differential CO2 concentration and H2O-vapor partial pressure between ambient/reference air entering the cuvette and analysis air leaving the cuvette, as measured by infrared gas analysis. The bulk air-flow rate through the chamber was

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Udoudo, Kufre Jerome, Ijeoma Emele Kalu, and Koyejo Oduola. "Impact of Liquefied Natural Gas Exports on the Nigerian Exchange Rate: An ARDL Cointegration Approach, 2000 to 2021." American Journal of Applied Statistics and Economics 3, no. 1 (2023): 1–14. http://dx.doi.org/10.54536/ajase.v3i1.2216.

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This study aimed to investigate the impact of liquefied natural gas (LNG) exports on the exchange rate of Nigeria. The investigation employed an autoregressive distributed lag model (ARDL) methodology to analyse data spanning the years 2000 to 2021 using a biannual dataset. The empirical findings provided evidence of a statistically significant and positive influence of liquefied natural gas exports on the exchange rate. This is supported by the results obtained from the short-term analysis. The research results revealed no causal link between the exports of LNG and the exchange rate in Nigeri

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Pelletier, Vincent, Steeve Pepin, Thomas Laurent, Jacques Gallichand, and Jean Caron. "Cranberry Gas Exchange under Short-term Hypoxic Soil Conditions." HortScience 51, no. 7 (2016): 910–14. http://dx.doi.org/10.21273/hortsci.51.7.910.

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Cranberries were grown under controlled environmental conditions to determine the effects of soil waterlogging on cranberry gas exchange in three growth stages and to investigate the recovery time after waterlogging. Photosynthesis declined by 28% after the first day of waterlogging at the bud elongation stage and was 46% lower after the fifth day. At the flowering stage, the reduction in photosynthesis started to be significant only after the fifth day, whereas no reduction was observed at the fruit development stage. Stomatal limitations were responsible, in part, for the observed decrease i

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Wenneck, Gustavo Soares, Reni Saath, Roberto Rezende, et al. "Silicon Application Contributes to Efficient Gas Exchange in Tomato Plants." Journal of Sustainable Development 17, no. 6 (2024): 110. http://dx.doi.org/10.5539/jsd.v17n6p110.

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The study aimed to analyze the effect of silicon application on tomato crops subjected to different water management conditions. The experiment was conducted in a completely randomized design with two water replacement conditions (60 and 100% of crop evapotranspiration - ETc), four forms of silicon application (no application, full-dose soil application, split soil application and foliar application) with four replicates. When the plants were in the reproductive stage, gas exchange analysis was performed in two periods (critical period before water replacement and after water replacement). The

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Książki na temat "Adequate gas exchange"

Khan, Nayema, and John Pawlowski. Disruption of Diffusion. Edited by Matthew D. McEvoy and Cory M. Furse. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780190226459.003.0020.

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Adequate gas exchange in the lungs requires a balance between three key processes: ventilation (V), the flow of gas from the environment to the alveoli; perfusion (Q), the circulation to the pulmonary capillary beds; and diffusion of the gas from the alveolar space into the alveolar capillaries. This chapter discusses the management of diseases of the air space, which include secretions, pneumonia, pulmonary edema, and hemoptysis. Collectively these conditions result in the build-up of fluid in the alveolar space and thickening of the alveolar membrane, leading to a mismatch in ventilation and

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Oliver, Charles M., and S. Ramani Moonesinghe. Setting rate, volume, and time in ventilatory support. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0093.

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Ventilator rate, volume, and time parameters are interrelated directly, mechanically, and physiologically, and interactions between intrinsic pulmonary physio-mechanics, pathology and the effects of mechanical ventilation complex. The physiological consequences of mechanical ventilation and risks of ventilator-induced trauma may be exacerbated by lung pathology. Programming of ventilator parameters should be considered within the context of an individualized ventilatory strategy to achieve adequate gas exchange, while minimizing attendant risks of mechanical ventilation. Recommended strategies

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Bauman, Kristy A., and Robert C. Hyzy. Volume-controlled mechanical ventilation. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0095.

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The goal of mechanical ventilation is to achieve adequate gas exchange while minimizing haemodynamic compromise and ventilator-associated lung injury. Volume-controlled ventilation can be delivered via several modes, including controlled mechanical ventilation, assist control (AC) and synchronized intermittent mandatory ventilation (SIMV). .In volume-controlled modes, the clinician sets the flow pattern, flow rate, trigger sensitivity, tidal volume, respiratory rate, positive end-expiratory pressure, and fraction of inspired oxygen. Patient ventilator synchrony can be enhanced by setting appro

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Delgado Martín, Jordi, Andrea Muñoz-Ibáñez, and Ismael Himar Falcón-Suárez. 6th International Workshop on Rock Physics: A Coruña, Spain 13 -17 June 2022: Book of Abstracts. 2022nd ed. Servizo de Publicacións da UDC, 2022. http://dx.doi.org/10.17979/spudc.000005.

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[Abstract] The 6th International Workshop on Rock Physics (6IWRP) was held A Coruña, Spain, between 13th and 17th of June, 2022. This meeting follows the track of the five successful encounters held in Golden (USA, 2011), Southampton (UK, 2013), Perth (Australia, 2015), Trondheim (Norway, 2017) and Hong Kong (China, 2019). The aim of the workshop was to bring together experiences allowing to illustrate, discuss and exchange recent advances in the wide realm of rock physics, including theoretical developments, in situ and laboratory scale experiments as well as digital analysis. While rock phys

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Chiarandini, Paolo, and Giorgio Della Rocca. Post-operative ventilatory dysfunction management in the ICU. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0362.

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Alterations in respiratory function and gas exchanges are frequently seen in patients during anaesthesia and in the post-operative period. Mechanical ventilation and drugs such as neuromuscular blocking agents can alter normal function of the respiratory system and cause damage to lungs. Protective ventilation strategies should always be adopted intra-operatively in mechanically-ventilated patients. A neuromuscular monitoring-guided use of decurarizating agents and post-operative adequate analgesia techniques are recommended to avoid post-operative residual curarization and pain. Pneumonia is

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Perry, Steven F., Markus Lambertz, and Anke Schmitz. Respiratory Biology of Animals. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199238460.001.0001.

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The aim of this book is to shed light on one of the most fundamental processes of life in the various lineages of animals: respiration. It provides a certain background on the physiological side of respiration, but it clearly focuses on the morphological aspects. In general, the intention of this book is to illustrate the impressive diversity of respiratory faculties (form–function complexes) rather than serving as an encyclopaedic handbook. It takes the reader on a journey through the entire realm of animals and discusses the structures involved in gas exchange, how they work, and most import

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Części książek na temat "Adequate gas exchange"

Cheng, Caroline, and Savis Gohari. "Exploring Multilevel Governance Networks in Deployment of Positive Energy Districts: Case of Salzburg." In Lecture Notes in Civil Engineering. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-69626-8_99.

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AbstractPositive Energy Districts (PEDs) represent innovative place-based strategic approaches aimed at advancing our climate goals within the built environment. PEDs are increasingly recognized as a vital component in the journey toward achieving climate neutrality and fostering smart cities. Success in deploying PEDs necessitates holistic consideration of political, social, environmental, procedural, economic, technological, and contextual factors, involving shifting constellations of stakeholders. Achieving human-centric PEDs requires a transdisciplinary collaboration and a cocreation appro

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Cumpstey, Andrew, and Mike Grocott. "Gas Exchange." In Oxford Textbook of Respiratory Critical Care. Oxford University PressOxford, 2023. http://dx.doi.org/10.1093/med/9780198766438.003.0003.

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Abstract Summary Inadequate gas exchange (respiratory failure) is the most common reason for admission to critical care and associated with high mortality rates. Effective gas exchange requires adequate ventilation, diffusion, and perfusion. Hypoxaemia (low blood oxygen saturation) will result if any of these are inadequate, whereas hypercapnia typically results from inadequate ventilation. Two different types of respiratory failure can be considered clinically—normocapnic (sometimes called ‘Type 1’), where oxygenation is impaired but ventilation and therefore clearance of carbon dioxide (CO2)

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Hlastala, Michael P., and Albert J. Berger. "Overview and Physical Principles." In Physiology of Respiration. Oxford University PressNew York, NY, 2001. http://dx.doi.org/10.1093/oso/9780195138467.003.0001.

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Abstract The respiratory system is composed of the airways and lungs as well as the respiratory muscles that regulate gas movement into and out of these structures. Within the lungs, exchange of molecules of oxygen (02) and carbon dioxide (CO2) between the gas and blood occurs. The need for gas exchange is met in different ways by various organisms. In single-cell organisms, it can be met by simple molecular diffusion across the cell membrane to and from the external environment. There is no need for specialized gas exchange or a blood-pumping and distribution system. It has been estimated tha

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Farela, Andrea, and Tatiana Jamroz. "Ventilation/Perfusion." In Basic Anesthesia Review, edited by Alaa Abd-Elsayed. Oxford University PressNew York, 2024. http://dx.doi.org/10.1093/med/9780197584569.003.0217.

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Abstract Lung ventilation and pulmonary perfusion are essential components of the normal function of the lung, but it is their ratio (V/Q) that determines adequate gas exchange. This chapter on ventilation/perfusion defines the main concepts about gas exchange in the lungs and different factors involved in its variability throughout the lung. It reviews the concepts of dead space and shunt, and its effects on V/Q, as well as the mechanisms involved in V/Q mismatch. It also mentions the most common pathologies that exemplify dead space and shunt. A typical example of pathology causing V/Q misma

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Bukunmi Ogunro, Olalekan, and Oluwaseun Ruth Olasehinde. "Respiratory Failure in COVID-19 Condition." In Respiratory Insufficiency [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.111380.

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Respiratory failure, characterized as the unsuccessful maintenance of adequate gas exchange, is associated with abnormalities of arterial blood gas tensions. The coronavirus disease-2019 (COVID-19) is majorly a respiratory disease capable of causing infection caused by the newly discovered coronavirus (SARS-CoV-2) with a consequential effect on respiratory failure. Simply put, respiratory failure is the major clinical demonstration of COVID-19 and the frontline cause of the associated mortality. Respiratory failure instigated by COVID-19 has some clinical features in affected patients. Disorde

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Howitt, Samuel, and Marc O. Maybauer. "Airway Management in ECMO Patients." In Extracorporeal Membrane Oxygenation, edited by Marc O. Maybauer. Oxford University Press, 2022. http://dx.doi.org/10.1093/med/9780197521304.003.0007.

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Airway management in patients requiring extracorporeal life support (ECLS) in the form of mechanical circulatory support (MCS) or extracorporeal membrane oxygenation (ECMO) can be problematic. In addition to the generic risks of airway management common to all patients undergoing anesthesia, preexisting cardiorespiratory compromise may be exacerbated by induction of anesthesia, leading to rapid and marked deterioration. Consequently, the choice of techniques and drugs to be used requires careful consideration. Recently published guidelines provide a framework for planning and clinical decision

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Gabriel, Rodney A., and Michael R. Pinsky. "Monitoring Cardiovascular Function in Critically Ill Patients." In Oxford Textbook of Respiratory Critical Care. Oxford University PressOxford, 2023. http://dx.doi.org/10.1093/med/9780198766438.003.0017.

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Abstract Summary Haemodynamic monitoring is an essential aspect of the care of patients with respiratory failure because cardiovascular compromise may occur as a result of respiratory failure and mechanical ventilation. Monitoring needs to be personalized based on the severity of respiratory failure, its aetiologies, and concerns of either too much or too little fluid resuscitation on gas exchange. Monitoring includes non-invasive and invasive measures that can be both intermittent and continuous in their recordings. In general, one starts with the least invasive monitoring and escalates to mo

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Gabriel, Rodney A., and Michael R. Pinsky. "Monitoring Cardiovascular Function in Critically Ill Patients." In Oxford Textbook of Respiratory Critical Care, edited by Suveer Singh, Paolo Pelosi, Andrew Conway Morris, and Matthew P. Wise. Oxford University PressOxford, 2023. https://doi.org/10.1093/med/9780198766438.003.0017_update_001.

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Abstract Haemodynamic monitoring is an essential aspect of the care of patients with respiratory failure because cardiovascular compromise may occur as a result of respiratory failure and mechanical ventilation. Monitoring needs to be personalized based on the severity of respiratory failure, its aetiologies, and concerns of either too much or too little fluid resuscitation on gas exchange. Monitoring includes non-invasive and invasive measures that can be both intermittent and continuous in their recordings. In general, one starts with the least invasive monitoring and escalates to a more inv

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Ternes, Tyler H. "Endotracheal and Enteric Tubes." In Chest Imaging. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780199858064.003.0007.

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The Endotracheal and Enteric Tubes chapter addresses these frequently used medical devices. An endotracheal tube (ETT) is a catheter placed into the airway for mechanical ventilation. It serves to protect the airway and provide adequate gas exchange. The ideal position of the endotracheal tube tip is approximately 5 cm above the carina. Complications of ETT placement include inadequate ventilation if placed too high or too low, esophageal intubation and tracheal injury. Tracheostomy tubes are used in patients who require long-term intubation. Enteric tubes are thin flexible hollow catheters th

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Umbrello, Michele, Paolo Formenti, and Davide Chiumello. "Acute Respiratory Distress Syndrome." In Oxford Textbook of Respiratory Critical Care. Oxford University PressOxford, 2023. http://dx.doi.org/10.1093/med/9780198766438.003.0021.

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Abstract Summary Acute respiratory distress syndrome (ARDS) is characterized by non-cardiogenic pulmonary oedema with bilateral chest X-ray opacities and reduction in respiratory system compliance. The hallmark of the syndrome is hypoxaemia refractory to oxygen therapy. Although the standard supportive treatment remains mechanical ventilation (both non-invasive and invasive), adjuvant therapies can be considered. Therapeutic approaches to ARDS, including lung-protective ventilation, prone positioning, inhaled vasodilators, neuromuscular blockade, steroids, and recruitment manoeuvres, will be r

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Streszczenia konferencji na temat "Adequate gas exchange"

O’Neill, Tyler. "Laser Cleaning for Surface Preparation for Pre-Weld and Pre-Bonding Applications." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-18182.

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ABSTRACT As laser cleaning continues to gain popularity as a source for surface prep and coating removal, this study will explore the use of laser ablation to remove contaminant oxidation and other contamination from metallic substrates. Laser cleaning systems can target coatings while having a minimal impact to the metallic substrates. This study will demonstrate how using laser cleaning technology can improve the surface free energy of a substrate and promote successful welding and adhesive bonding. The process of ablation is created when the laser wavelength is absorbed into the contaminant

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Bakker, W. T., and R. A. Perkins. "Laboratory Study of Superheater Corrosion in Coal Gasification Power Plants." In CORROSION 1989. NACE International, 1989. https://doi.org/10.5006/c1989-89525.

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Abstract Alloys for use in high temperature heat exchangers of coal gasification plants must resist sulfidation in H2S and HCl containing, highly reducing gas mixtures as well as aqueous corrosion by acid condensates. At temperatures below about 400°C, commercially available high chromium alloys containing molybdenum are adequate, i.e., for use in evaporators. At superheater temperatures (&gt;500°C), molybdenum adversely affects the sulfidation resistance of high chromium alloys, thus increasing corrosion rates to 0.5-1 mm/yr. The use of vanadium instead of molybdenum to provide aqueous co

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Nagarajan, Ravi, Steve Liebhart, Pedro Escudero, and Shahab Soltaninia. "Bio Fuel Feedstock and Finish Products – Linings Case Study." In CONFERENCE 2023. AMPP, 2023. https://doi.org/10.5006/c2023-18898.

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Abstract The production of Renewable Fuels has been embraced by the Global Oil and Gas Industry to adopt more environmentally sustainable practices. This remarkable technology switch has been made possible by concerted research and design changes to traditional sourcing, handling, refining, and storing of natural oils feedstocks and bio-based finish products. Each end of the production chain of biofuels presents corrosion challenges to the infrastructure being used in the process and they must be separately and thoroughly understood by the coatings industry. This presentation examines lessons

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Boettner, Daisie D., Cheryl A. Massie, and Darrell D. Massie. "Lessons Learned From Residential Experience With Proton Exchange Membrane Fuel Cell Systems for Combined Heat and Power." In ASME 2004 2nd International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2004. http://dx.doi.org/10.1115/fuelcell2004-2480.

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As part of a one-year Department of Defense demonstration project, proton exchange membrane fuel cell systems have been installed at three residences to provide electrical power and waste heat for domestic hot water and space heating. The 5 kW-capacity fuel cells operate on reformed natural gas. These systems operate at preset levels providing power to the residence and to the utility grid. During grid outages, the residential power source is disconnected from the grid and the fuel cell system operates in standby mode to provide power to critical loads in the residence. This paper describes le

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Chmielniak, Tadeusz, Włodzimierz Wro´blewski, Grzegorz Nowak, and Daniel Wec˛el. "Coupled Analysis of Cooled Gas Turbine Blades." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38657.

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The paper presents solution aspects of the heat transfer modeling and fluid flow prediction of the convective cooled gas turbine blade. The heat transfer problem within the blade material is solved using finite element method whereas the flow problem employs the finite volume method. The flow field is calculated by solving the Navier-Stokes (NS) equations. The problem can be faced in two ways which are presented in this work. The first one is the uncoupled field method which does not take into consideration the interaction between the flowing medium and the blade. This way of solution is simpl

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Wanker, R., J. C. Wurzenberger, and D. Higbie. "1D and 3D CFD Simulation of Exhaust-Gas Aftertreatment Devices: Parameter Optimization via Genetic Algorithm." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-3088.

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Future limits on emissions for both gasoline and Diesel engines require adequate and advanced systems for the aftertreatment of the exhaust gas. Computer models as a complementary tool to experimental investigations are indispensable to design reliable after-treatment devices such as catalytic converters and Diesel particulate filters. Therefore, the objective of this contribution is to present an integrated 1D to 3D simulation workflow of catalytic converters (Three-Way-Catalyst, Diesel Oxidation Catalyst, Selective Catalytic Reduction Catalyst, ...) and Diesel particulate filters. The parame

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Hallow, K. Melissa, and Samir N. Ghadiali. "Effect of Cytoskeletal Structure and Mechanics on Epithelial Cell Adhesion During Airway Reopening." In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-192420.

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Patients suffering from acute respiratory distress syndrome (ARDS) require mechanical ventilation in order to maintain adequate gas exchange. However, ventilation can contribute to further lung damage through overdistension and/or the reopening of fluid-filled airways which causes epithelial cell (EpC) death and detachment and an upregulated inflammatory response [1]. While previous research has focused on minimizing the injurious mechanical forces generated during ventilation [2], an alternative approach is to alter the way that forces are transmitted from the cell surface to its structural e

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Ugolo, J. U., M. C. Iwegbu, and A. Onwuchei. "Comparative Study for the Successful Implementation of Compressed Natural Gas (CNG) Solution in Developed and Developing Countries." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2024. http://dx.doi.org/10.2118/221725-ms.

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Abstract Nigeria in the recent past has faced dual-fuel (petrol and diesel) shortages. The non-functional or sub-functional refineries have made the availability of these products even more scarce and expensive for the average Nigerian. The key source for the petroleum commodities identified has been importation, which has further depleted the much-desired forex required by the nation. Inversely, Nigeria has abundant Natural Gas Reserves estimated at 209 trillion cubic feet (NUPRC, 2023). A large chunk of her natural gas reserves is produced and exported leaving the domestic market with a meag

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Ramos-Alvarado, Bladimir, Abel Hernandez-Guerrero, Daniel Juarez-Robles, Cuauhtemoc Rubio-Arana, and Francisco Vital-Flores. "CFD Analysis of a Constructal Flow Distributor as a Bipolar Plate for PEMFC’s." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11113.

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A plate-type constructal flow distributor is implemented as a gas distributor for a proton exchange membrane fuel cell. A 3D complete model is simulated using CFD techniques. The fuel cell model includes the gas flow channels, the gas diffusion layers and the membrane electrode assembly (MEA). The governing equations for the mass and momentum transfer are solved including the pertinent source terms due to the electrochemical reactions in the different zones of the fuel cell. Similar configurations have been already presented in previous studies but using the flow distributor as a heat remover;

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Schuler, P., W. Kurz, K. Dullenkopf, and H. J. Bauer. "The Influence of Different Rim Seal Geometries on Hot-Gas Ingestion and Total Pressure Loss in a Low-Pressure Turbine." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22205.

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In order to prevent hot-gas ingestion into the rotating turbo machine’s inside, rim seals are used in the cavities located between stator- and rotor-disc. The sealing flow ejected through the rim seal interacts with the boundary layer of the main gas flow, thus playing a significant role in the formation of secondary flows which are a major contributor to aerodynamic losses in turbine passages. Investigations performed in the EU project MAGPI concentrate on the interaction between the sealing flow and the main gas flow and in particular on the influence of different rim seal geometries regardi

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Raporty organizacyjne na temat "Adequate gas exchange"

Guevara-Castañeda, Diego Alejandro, Leonardo Villar-Gómez, Olga Lucía Acosta-Navarro, et al. Report of the Board of Directors to the Congress of Colombia, February 2025. Banco de la República, 2025. https://doi.org/10.32468/inf-jun-dir-con-rep-eng.01-2025.

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In 2024, the macroeconomic adjustment process continued, characterized by a sustained reduction in inflation that began in 2023 and a decline in the current account deficit of the balance of payments. This adjustment took place in the context of a contractionary monetary policy, with a gradual reduction in the monetary policy interest rate. GDP grew by 1.7%, driven by investment and consumption, while employment increased by 2.2%. Foreign reserves remained at adequate levels, and Banco de la República recorded a profit of COP 10,041 billion, benefiting from the returns on foreign reserves. Mac

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