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Готові списки джерел за темами / High-Pressure stabilization

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Добірка наукової літератури з теми "High-Pressure stabilization"

Автор: Grafiati

Опубліковано: 7 вересня 2022

Оновлено: 1 лютого 2023

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Статті в журналах з теми "High-Pressure stabilization"

1

Kurzydłowski, Dominik, and Patryk Zaleski-Ejgierd. "High-pressure stabilization of argon fluorides." Physical Chemistry Chemical Physics 18, no. 4 (2016): 2309–13. http://dx.doi.org/10.1039/c5cp05725f.

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Argon forms isolated molecules stable solely in low temperature matrices or supersonic jet streams. We present hybrid DFT theoretical investigations into a new high-pressure reaction pathway, which enables synthesis of argon difluoride (ArF₂) in bulk and at room temperature.

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2

Potekhin, S. A., A. A. Senin, N. N. Abdurakhmanov, and E. I. Tiktopulo. "High pressure stabilization of collagen structure." Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics 1794, no. 8 (August 2009): 1151–58. http://dx.doi.org/10.1016/j.bbapap.2009.04.005.

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3

Ruiz-González, M. L., C. Prieto, J. Alonso, J. Ramírez-Castellanos, and J. M. González-Calbet. "Stabilization of CuIIIunder High Pressure in Sr2CuGaO5." Chemistry of Materials 14, no. 5 (May 2002): 2055–62. http://dx.doi.org/10.1021/cm0111884.

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4

Castellari, M., G. Arfelli, C. Riponi, G. Carpi, and A. Amati. "High Hydrostatic Pressure Treatments for Beer Stabilization." Journal of Food Science 65, no. 6 (September 2000): 974–77. http://dx.doi.org/10.1111/j.1365-2621.2000.tb09402.x.

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5

Ershov-Pavlov, E. A., L. E. Krat'ko, N. I. Chubruk, and V. D. Shimanovich. "Stabilization of a high-pressure arc in hydrogen." Journal of Applied Spectroscopy 46, no. 3 (March 1987): 317–21. http://dx.doi.org/10.1007/bf00660224.

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6

Yegorov, A. Y., and S. A. Potekhin. "Lysozyme Stabilization under High Pressure: Differential Scanning Microcalorimetry." Molecular Biology 52, no. 1 (January 2018): 30–35. http://dx.doi.org/10.1134/s0026893318010028.

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7

Norrby, N., H. Lind, G. Parakhonskiy, M. P. Johansson, F. Tasnádi, L. S. Dubrovinsky, N. Dubrovinskaia, I. A. Abrikosov, and M. Odén. "High pressure and high temperature stabilization of cubic AlN in Ti0.60Al0.40N." Journal of Applied Physics 113, no. 5 (February 7, 2013): 053515. http://dx.doi.org/10.1063/1.4790800.

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8

Sena, Hadi. "Stabilization of High-Pressure Phase Semiconductors by Plastic Strain." Journal of the Society of Powder Technology, Japan 58, no. 2 (February 10, 2021): 66–72. http://dx.doi.org/10.4164/sptj.58.66.

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9

Capjack, C. E., A. H. Labun, H. J. J. Seguin, and W. D. Bilida. "Magnetic laser discharge stabilization scaling to high‐pressure systems." Journal of Applied Physics 70, no. 11 (December 1991): 6761–65. http://dx.doi.org/10.1063/1.349850.

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10

Zaleski-Ejgierd, Patryk. "High-pressure formation and stabilization of binary iridium hydrides." Physical Chemistry Chemical Physics 16, no. 7 (2014): 3220. http://dx.doi.org/10.1039/c3cp54300e.

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Більше джерел

Дисертації з теми "High-Pressure stabilization"

1

Garby, Romain. "Simulations of flame stabilization and stability in high-pressure propulsion systems." Phd thesis, Toulouse, INPT, 2013. http://oatao.univ-toulouse.fr/9706/1/garby.pdf.

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2

Mari, Raphaël. "Influence of heat transfer on high pressure flame structure and stabilization in liquid rocket engines." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/15616/1/Mari_1.pdf.

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Анотація:

This research work deals with the problem of the flame stabilization in the context of high pressure liquid rocket engines. Flame stabilization in a rocket engine is a critical feature. An instability can lead to important damages of the engine or the destruction of the launcher and the satellite. The engines (Vulcain 2 and Vinci) of the Ariane 5, and the future Ariane 6, use the hydrogen/oxygen propellants. One characteristic of this couple is its high specific impulse. The launcher performance is linked to the ratio of the payload to the total mass of propellants. For volume reasons the propellants are stored at low temperature of the order of a few tens of Kelvin. When injected in the combustion chamber, their combustion releases a huge amount of heat leading to temperature of 3500K. In order to predict the heat transfer between the flame, the solid injector and the cold propellants the Large Eddy Simulation, which allows to capture the unsteady features of the flow, is used in association with a thermal solver for the injector. This approach is validated with a low pressure experiment conducted at Centrale Paris, then a basic 1D configuration allows to understand the phenomena of high pressure flame-wall interaction. Finally a configuration representative of a coaxial rocket engine injector allows to evaluate the structure and the stabilization mechanisms of a cryogenic flame, the heat flux and the temperature of the injector.

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3

Di, Corcia Sophie. "Bioguidage d'un procédé membranaire pour l'amélioration du potentiel santé d'un concentré d'agrumes enrichi en caroténoïdes dans le cadre de la prévention du syndrome métabolique." Thesis, Montpellier, 2022. http://www.theses.fr/2022MONTG009.

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Анотація:

Les agrumes sont des sources importantes de caroténoïdes provitaminiques A tel que la β-cryptoxanthine ou le β-carotène mais aussi d’autres caroténoïdes non-provitaminiques comme le lycopène. Ces microconstituants contribuent avec les flavonoïdes, les vitamines, minéraux et les fibres au bénéfice santé des agrumes. Dans ce contexte, ces travaux de thèse portent sur l’optimisation des effets santé de nouveaux concentrés d’agrumes enrichis en caroténoïdes en modulant leur procédé d’élaboration. Dans un premier temps, le travail s’intéresse à un procédé complet se basant sur de la microfiltration tangentielle couplée à d’autres opérations unitaires telles que la liquéfaction enzymatique, la diafiltration et la pasteurisation. L’impact des paramètres opératoires de toutes ces opérations unitaires est étudié. La stratégie innovante consiste à guider et optimiser le procédé en prenant en compte la bioaccessibilité des caroténoïdes des concentrés d’agrumes. Un plan d’expérience de criblage (Plackett-Burmann) est réalisé pour sélectionner les 7 paramètres opératoires les plus influents sur la bioaccessibilité des caroténoïdes reflétant la qualité nutritionnelle. Une fois sélectionnés, leurs effets sont évalués afin de trouver les conditions opératoires garantissant la meilleure bioaccessibilité des caroténoïdes tout en maintenant des performances satisfaisantes au niveau du procédé. Le traitement enzymatique est l’étape la plus influente sur la bioaccessibilité des caroténoïdes mais aussi sur les performances du procédé. La dose d’enzyme a des effets antagonistes sur la bioaccessibilité des caroténoïdes (effet négatif) et sur les performances du procédé (effet positif). Une dose de 50 µL.kg-1 permet d’obtenir le meilleur compromis entre la qualité nutritionnelle et les performances du procédé en fixant les 6 autres paramètres en faveur de la bioaccessibilité des caroténoïdes. Dans un deuxième temps, l’impact de la stabilisation par ha ute pression (voies isostatique et dynamique) sur la bioaccessibilité des caroténoïdes du concentré optimisé est évalué afin d’aboutir à un concentré au potentiel nutrition-santé optimal. Pour cela, les paramètres opératoires optimaux sélectionnés dans la partie précédente sont appliqués et la microfiltration est menée à un facteur de réduction massique égal à 8. L’application des hautes pressions ne diminue pas les teneurs en caroténoïdes et augmente leur bioaccessibilité. La voie dynamique permet de doubler la bioaccessibilité des caroténoïdes en comparaison avec la voie isostatique. Enfin, à partir du concentré optimisé et stabilisé obtenu, les effets santé impliqués dans la prévention du syndrome métabolique (Smet)et diabète de type 2 (DT2) sont évalués chez le rat, modèle de Smet/DT2 induit par fructose. La consommation de ce concentré permet de réduire les pathologies liées au Smet/dt2. En effet il améliore la régulation de la glycémie, diminue la dyslipidémie et favorise la b ioconversion des caroténoïdes en vitamine A. Ce produit à base d'agrumes pourrait être intégré en quantités appropriées, dans un régime alimentaire en tant qu'aliments à forte densité nutritionnelle
Citrus fruits are important sources of provitamin A carotenoids such as β-cryptoxanthin or β-carotene but also of other non-provitamin carotenoids like lycopene. These microconstituents contribute with flavonoids, vitamins, minerals and fibers to the health benefits of citrus fruits. In this context, this thesis work focuses on the optimization of the health effects of new citrus concentrates enriched with carotenoids by modulating their processing. In a first step, the work focuses on a complete process based on tangential microfiltration coupled with other unitary operations such as enzymatic liquefaction, diafiltration and pasteurization. The impact of the operating parameters of all these unit operations is studied. The innovative strategy consists in guiding and optimizing the process by taking into account the carotenoid bioaccessibility in citrus concentrates. A screening experimental design (Plackett-Burmann) is carried out to select the 7 most influential operating parameters on the carotenoids bioaccessibility reflecting nutritional quality. Once selected, their effects are evaluated in order to find the operating conditions that guarantee the best carotenoid bioaccessibility while maintaining satisfactory process performance. Enzyme treatment is the most influential step on the bioaccessibility of carotenoids but also on the process performance. The enzyme dose has antagonistic effects on carotenoid bioaccessibility (negative effect) and on process performance (positive effect). A dose of 50 µL.kg-1 provides the best compromise between nutritional quality and process performance by setting the other 6 parameters in favour of carotenoid bioaccessibility. Secondly, the impact of high-pressure stabilization (isostatic and dynamic ways) on the carotenoid bioaccessibility in the optimized concentrate is evaluated in order to obtain a concentrate with optimal nutritional and health potential. For this purpose, the optimal operating parameters selected in the previous section are applied and the microfiltration is conducted at a mass reduction factor of 8. The application of high-pressure does not decrease the carotenoid contents but increases their bioaccessibility. The dynamic way doubles the carotenoid bioaccessibility compared to the isostatic way. Finally, from the optimized and stabilized concentrate obtained, the health effects involved in the prevention of metabolic syndrome (Smet) and type 2 diabetes (T2D) are evaluated in the rat model of Smet/T2D induced by fructose. Consumption of this concentrate reduces the pathologies linked to Smet/T2D. Indeed, it improves glycaemia regulation, reduces dyslipidemia and promotes the bioconversion of carotenoids into vitamin A. This citrus-based product could be incorporated in appropriate quantities into a diet as a nutrient-dense food

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4

Di, Corcia Sophie. "Bioguidage d'un procédé membranaire pour l'amélioration du potentiel santé d'un concentré d'agrumes enrichi en caroténoïdes dans le cadre de la prévention du syndrome métabolique." Thesis, Université de Montpellier (2022-….), 2022. http://www.theses.fr/2022UMONG009.

Повний текст джерела

Анотація:

Les agrumes sont des sources importantes de caroténoïdes provitaminiques A tel que la β-cryptoxanthine ou le β-carotène mais aussi d’autres caroténoïdes non-provitaminiques comme le lycopène. Ces microconstituants contribuent avec les flavonoïdes, les vitamines, minéraux et les fibres au bénéfice santé des agrumes. Dans ce contexte, ces travaux de thèse portent sur l’optimisation des effets santé de nouveaux concentrés d’agrumes enrichis en caroténoïdes en modulant leur procédé d’élaboration. Dans un premier temps, le travail s’intéresse à un procédé complet se basant sur de la microfiltration tangentielle couplée à d’autres opérations unitaires telles que la liquéfaction enzymatique, la diafiltration et la pasteurisation. L’impact des paramètres opératoires de toutes ces opérations unitaires est étudié. La stratégie innovante consiste à guider et optimiser le procédé en prenant en compte la bioaccessibilité des caroténoïdes des concentrés d’agrumes. Un plan d’expérience de criblage (Plackett-Burmann) est réalisé pour sélectionner les 7 paramètres opératoires les plus influents sur la bioaccessibilité des caroténoïdes reflétant la qualité nutritionnelle. Une fois sélectionnés, leurs effets sont évalués afin de trouver les conditions opératoires garantissant la meilleure bioaccessibilité des caroténoïdes tout en maintenant des performances satisfaisantes au niveau du procédé. Le traitement enzymatique est l’étape la plus influente sur la bioaccessibilité des caroténoïdes mais aussi sur les performances du procédé. La dose d’enzyme a des effets antagonistes sur la bioaccessibilité des caroténoïdes (effet négatif) et sur les performances du procédé (effet positif). Une dose de 50 µL.kg-1 permet d’obtenir le meilleur compromis entre la qualité nutritionnelle et les performances du procédé en fixant les 6 autres paramètres en faveur de la bioaccessibilité des caroténoïdes. Dans un deuxième temps, l’impact de la stabilisation par ha ute pression (voies isostatique et dynamique) sur la bioaccessibilité des caroténoïdes du concentré optimisé est évalué afin d’aboutir à un concentré au potentiel nutrition-santé optimal. Pour cela, les paramètres opératoires optimaux sélectionnés dans la partie précédente sont appliqués et la microfiltration est menée à un facteur de réduction massique égal à 8. L’application des hautes pressions ne diminue pas les teneurs en caroténoïdes et augmente leur bioaccessibilité. La voie dynamique permet de doubler la bioaccessibilité des caroténoïdes en comparaison avec la voie isostatique. Enfin, à partir du concentré optimisé et stabilisé obtenu, les effets santé impliqués dans la prévention du syndrome métabolique (Smet)et diabète de type 2 (DT2) sont évalués chez le rat, modèle de Smet/DT2 induit par fructose. La consommation de ce concentré permet de réduire les pathologies liées au Smet/dt2. En effet il améliore la régulation de la glycémie, diminue la dyslipidémie et favorise la b ioconversion des caroténoïdes en vitamine A. Ce produit à base d'agrumes pourrait être intégré en quantités appropriées, dans un régime alimentaire en tant qu'aliments à forte densité nutritionnelle
Citrus fruits are important sources of provitamin A carotenoids such as β-cryptoxanthin or β-carotene but also of other non-provitamin carotenoids like lycopene. These microconstituents contribute with flavonoids, vitamins, minerals and fibers to the health benefits of citrus fruits. In this context, this thesis work focuses on the optimization of the health effects of new citrus concentrates enriched with carotenoids by modulating their processing. In a first step, the work focuses on a complete process based on tangential microfiltration coupled with other unitary operations such as enzymatic liquefaction, diafiltration and pasteurization. The impact of the operating parameters of all these unit operations is studied. The innovative strategy consists in guiding and optimizing the process by taking into account the carotenoid bioaccessibility in citrus concentrates. A screening experimental design (Plackett-Burmann) is carried out to select the 7 most influential operating parameters on the carotenoids bioaccessibility reflecting nutritional quality. Once selected, their effects are evaluated in order to find the operating conditions that guarantee the best carotenoid bioaccessibility while maintaining satisfactory process performance. Enzyme treatment is the most influential step on the bioaccessibility of carotenoids but also on the process performance. The enzyme dose has antagonistic effects on carotenoid bioaccessibility (negative effect) and on process performance (positive effect). A dose of 50 µL.kg-1 provides the best compromise between nutritional quality and process performance by setting the other 6 parameters in favour of carotenoid bioaccessibility. Secondly, the impact of high-pressure stabilization (isostatic and dynamic ways) on the carotenoid bioaccessibility in the optimized concentrate is evaluated in order to obtain a concentrate with optimal nutritional and health potential. For this purpose, the optimal operating parameters selected in the previous section are applied and the microfiltration is conducted at a mass reduction factor of 8. The application of high-pressure does not decrease the carotenoid contents but increases their bioaccessibility. The dynamic way doubles the carotenoid bioaccessibility compared to the isostatic way. Finally, from the optimized and stabilized concentrate obtained, the health effects involved in the prevention of metabolic syndrome (Smet) and type 2 diabetes (T2D) are evaluated in the rat model of Smet/T2D induced by fructose. Consumption of this concentrate reduces the pathologies linked to Smet/T2D. Indeed, it improves glycaemia regulation, reduces dyslipidemia and promotes the bioconversion of carotenoids into vitamin A. This citrus-based product could be incorporated in appropriate quantities into a diet as a nutrient-dense food

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5

Mendez, Ecoscia Ana Carolina. "Experimental Study of Emulsion Polymerization of Vinylidene Fluoride." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1203.

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Le développement d’un procédé de polymérisation en émulsion est complexe de par la nature hétérogène de ce type de réaction. En outre, dans le cas de la polymérisation en émulsion du fluorure de vinylidène, la difficulté est d’autant plus accrue que le monomère est habituellement en phase gazeuse ou supercritique dans les conditions d’intérêt. Or la littérature manque d’informations concernant ce type de procédé de synthèse du PVDF sous une pression comprise entre 30 bar et 90 bar.Ainsi cette thèse a pour objectif de contribuer à une meilleure compréhension des mécanismes cinétiques et de stabilisation intervenants dans la polymérisation radicalaire en émulsion du VDF dans des conditions supercritiques et, plus particulièrement, de fournir des données expérimentales nécessaires à l’élaboration de futurs modèles.Avant même d’entreprendre les études expérimentales, cette thèse s’intéresse d’abord aux aspects d’installation et d’automatisation de l’unité de polymérisation ainsi qu’au démarrage et à l’optimisation du réacteur. Ensuite, plusieurs tests sont réalisés afin de comprendre certaines caractéristiques du latex produit ainsi que certaines propriétés du tensioactif fluoré. Une nouvelle méthode a spécialement été développée afin de suivre le phénomène de coagulation des particules de polymère.Finalement des réactions sont réalisées par lot et en semi-continu et une étude paramétrique des conditions opératoires et de la composition des réactifs est effectuée afin d’évaluer leur impact sur l’évolution de la polymérisation en émulsion. Notamment, le profil de vitesse de polymérisation est obtenu par calorimétrie, à partir d’une approche pratique fondée sur un estimateur d’état en cascade, ainsi que sur la mesure de la consommation de monomère, et sur l’analyse gravimétrique réalisée par prélèvement
The heterogeneous nature of the conventional emulsion polymerization can render the process quite complex. In the case of the emulsion polymerisation of vinylidene fluoride (VDF), the situation is more complicated than for the majority of industrial processes because the monomer is typically either a gas or a supercritical fluid under the polymerization conditions of interest. Given the relatively high pressure required for this process (30bar

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6

Collaudin, Bernard. "Stabilisation d'hydrogène atomique polarisé en champ magnétique intense (B [inférieur ou égal à] 14 T)." Grenoble 1, 1986. http://www.theses.fr/1986GRE10059.

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Pour l'etude de h|, mise au point d'un appareil compose d'un refrigerateur a dilution de forte puissance (2mw a 100mk) fonctionnant sous champ magnetique intense (14t) produit par des bobines supraconductrices en bain superfluide non sature. Mesures thermodynamiques de temperature, pression et densite apres developpement de jauges de pression tres sensibles (10**(-4)pa) et d'un bolometre pour mesurer l'energie de recombinaison (10**(10) atomes h). Realisation de la stabilisation de h| a des densites superieures a 10**(16) at/cm**(3), entre 0,25 et 0,55k, dans des champs jusqu'a 13,2t

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7

Mallardeau, Catherine. "L'hydrogène atomique polarisé : interaction avec les films d'Helium : expérience de compression." Paris 6, 1986. http://www.theses.fr/1986PA066186.

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Etude expérimentale de certains mécanismes de recombinaison de H| afin de comprendre les limites à l'obtention de la condensation de Bose Einstein. Mesure de l'énergie d'adsorption de H sur une couche mince 4He en fonction de l'épaisseur de la couche, paramètre qui donne les limites de stabilisation de H à basse température; obtention de la stabilisation sur des couches biomoléculaires. Construction d'un dispositif expérimental pour comprimer le gaz H| en champ magnétique de 20t, pour étudier le taux de recombinaison à 3 corps de H à haute densité et en champ magnétique intense.

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Книги з теми "High-Pressure stabilization"

1

Nadkarni, Vinay, Robert M. Sutton, and Robert A. Berg. Resuscitation and Stabilization. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199918027.003.0001.

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The authors provide essential information on providing care during the four phases of cardiac arrest and cardiopulmonary resuscitation (CPR): (1) prearrest, (2) no flow (untreated cardiac arrest), (3) low flow (CPR), and (4) postresuscitation. They discuss the most common precipitating events for out-of-hospital and in-hospital cardiac arrests in children and the how to deliver high-quality CPR. Medications used to treat cardiac arrest are presented (specifically vasopressors, including epinephrine; antiarrhythmics, including lidocaine, amiodarone, and magnesium sulfate; calcium; and sodium bicarbonate), along with the clinical indications and rationale for their use. Appropriate goals for care after return of spontaneous circulation are delineated, with guidelines for targeted temperature management and blood pressure.

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2

Pisklakov, Sergey, Haitham Ibrahim, and Ingrid A. Fitz-James Antoine. Elevated ICP. Edited by David E. Traul and Irene P. Osborn. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190850036.003.0023.

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Perioperative management of a patient with elevated intracranial pressure (ICP) is of paramount importance in neuroanesthesiology. Should this clinical emergency remain unaddressed, disability and death will ensue. Suboptimal care of a patient with elevated ICP is associated with avoidable morbidity and predictable mortality unless timely medical interventions, a focused history, targeted physical findings and a high degree of clinical suspicion confirmed by selective imaging result in medical stabilization and more definitive neurosurgical intervention. This may require interinstitutional transport. Understanding the physiologic and pathologic concepts that underlie elevated ICP permit anticipatory interventions to avert inexorable deterioration. The etiology of elevated intracranial pressure is often multifactorial. The deleterious effects of rising ICP demand a clear understanding of the relationship between ICP, mean arterial pressure (MAP), cerebral perfusion pressure (CPP), and cerebral autoregulation. Maintaining optimal CPP to prevent cerebral ischemia is the neuroanesthesiologist’s ultimate goal while managing a patient with an elevated ICP.

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Частини книг з теми "High-Pressure stabilization"

1

Verret, C., P. Ballestra, L. Jacquet, and A. El Moueffak. "Stabilization of Agaricus Bisporus Mushrooms by Combined Action of High Pressure and Heat." In Advances in High Pressure Bioscience and Biotechnology II, 375–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05613-4_67.

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2

Demazeau, G. "Stabilization of Unusual Oxidation States of Transition Metals in Oxygen Lattices: Correlations with the Induced Electronic Phenomena." In Frontiers of High Pressure Research II: Application of High Pressure to Low-Dimensional Novel Electronic Materials, 1–11. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0520-3_1.

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3

Pivovarov, S. P., L. A. Vasilevskaya, and A. Bakhtigereyeva. "High Pressure Influence on Processes of Free Radical Stabilization in Irradiated Polymethylmethacrylate Copolymers." In 25th Congress Ampere on Magnetic Resonance and Related Phenomena, 358. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-76072-3_186.

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4

Helmstaedt, H. H. "Tectonic Relationships Between E-Type Cratonic and Ultra-High-Pressure (UHP) Diamond: Implications for Craton Formation and Stabilization." In Proceedings of 10th International Kimberlite Conference, 45–58. New Delhi: Springer India, 2013. http://dx.doi.org/10.1007/978-81-322-1170-9_4.

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5

Clark, D. S., M. M. Sun, L. Giarto, P. C. Michels, A. Matschiner, and F. T. Robb. "Stabilization of Thermophilic Enzymes by Pressure." In High Pressure Bioscience and Biotechnology, Proceedings of the International Conference on High Pressure Bioscience and Biotechnology, 195–202. Elsevier, 1996. http://dx.doi.org/10.1016/s0921-0423(06)80035-3.

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6

El Moueffak, A., C. Cruz, M. Montury, A. Deschamps, A. Largeteau, and G. Demazeau. "Stabilization of black truffle of Perigord (Tuber melanosporum) by high pressure treatment." In High Pressure Bioscience and Biotechnology, Proceedings of the International Conference on High Pressure Bioscience and Biotechnology, 401–4. Elsevier, 1996. http://dx.doi.org/10.1016/s0921-0423(06)80068-7.

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7

Martín-Sánchez, Francisco J., Òscar Miró, and Héctor Bueno. "Acute heart failure: immediate management/stabilization." In ESC CardioMed, 1917–21. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0440.

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Acute heart failure (AHF) is a potentially life-threatening medical condition requiring emergency hospital evaluation. This chapter highlights aspects of early diagnosis, risk stratification, and treatment. The high-risk patient with AHF is characterized by the presence of severe respiratory failure and haemodynamic instability with or without systemic hypoperfusion, and the presence of potentially life-threatening AHF causes CHAMP (acute Coronary syndrome, Hypertensive emergency, Arrhythmias, acute Mechanical cause, and acute Pulmonary embolism). This high-risk patient is a potential candidate for respiratory and circulatory support, invasive monitoring with an arterial line, and the treatment of CHAMP. After ruling out a high-risk situation, AHF diagnosis must be confirmed with clinical evaluation and additional investigations, including 12-lead electrocardiography, chest X-ray, and laboratory assessment with natriuretic peptide levels. This non-high-risk patient requires non-invasive monitoring and early initiation of appropriate therapy guided by systolic blood pressure.

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8

Stricsek, Geoffrey, Omaditya Khanna, Alexandra Emes, and James Harrop. "Acute Spinal Cord Injury." In Medical Management of Neurosurgical Patients, 88–102. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780190913779.003.0006.

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Spinal cord injury (SCI) can be a complex injury pathology with high rates of morbidity and mortality. Care for the patient with spinal cord injury is dictated by their neurological status and the structural morphology of their injury and begins with prehospital management, thorough neurological assessment, and advanced imaging. Often surgical intervention is required for fracture stabilization and decompression of spinal cord pressure. Vigilance needs to remain high after surgery as SCI patients are at increased risk for multiple medical complications as a result of their injuries. Focused, comprehensive care delivered by the hospitalist and care team can facilitate improved outcomes.

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9

Plonsker, Jillian, Michael Brandel, Usman Khan, and Michael L. Levy. "Penetrating Craniocerebral Injury in Pediatric Patients." In Frontiers In Traumatic Brain Injury. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.106549.

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Penetrating head trauma is rare in the pediatric population, and rarer still in the civilian pediatric population. The high rehabilitation potential of children and the higher likelihood of a low-velocity, survivable injury necessitates careful management to minimize morbidity due to secondary injury from ischemia or infection. Management of penetrating injuries includes patient stabilization, appropriate imaging, and if surgery is needed, entry/exit site debridement with dural closure to prevent cerebrospinal fluid leak. Post-operative care includes infection prevention, intracerebral pressure management, and early identification of vasospasm and pseudoaneurysm formation.

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10

Brockmeyer, Douglas. "Traumatic Atlanto-Axial Dislocation." In Pediatric Neurosurgery, 101–7. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780190617073.003.0012.

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The presence of atlanto-axial dislocation (AOD) must be ruled out in pediatric patients with high-energy traumatic injuries. Young children are particularly prone to AOD given the high ratio of head to body size and mass. Dynamic x-rays and distracting cervical collars should not be used if a suspicion of AOD is present, as these can lead to neurologic compromise. A condylar-C1 interval (CCI) of greater than 4 mm on cervical spine CT with coronal and sagittal reconstructions is consistent with AOD. MRI will confirm the diagnosis and extent of ligamentous injury. Careful immobilization and elevation of blood pressure should be initiated and surgical stabilization with an occiput to C2 fusion planned. Instrumentation of the craniocervical spine may be challenging based on age and anatomy. Careful intraoperative technique will result in high rates of fusion.

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Тези доповідей конференцій з теми "High-Pressure stabilization"

1

Hiller, Sven-Jürgen, Jakob Hermann, and Robert Widhopf-Fenk. "High Pressure Compressor Stabilization by Controlled Pulsed Injection." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68460.

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Steady tip injection with re-circulated air as a reliable method for high pressure compressor stabilization has the disadvantage to reduce the efficiency due to the usage of already compressed air. Therefore, the minimization of recirculation air and/or a large extension of the stable operation range is mandatory. The paper describes an alternative approach by using an active compressor stability control system with modulating valves. The system was tested at a high pressure compressor. It recognized evolving stall cells reliable. The achieved available stable throttling range of the compressor (in terms of mass flow) was more than doubled by active controlled injection compared to steady tip injection at 90% aerodynamic speed. The other way round, depending on the tip flow structure and the aerodynamic speed injection mass flow saving up to 50% at a similar surge margin compared to steady injection was achieved.

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2

Gao, Xiaohui, Gauri Patwardhan, Bonggu Shim, Tenio Popmintchev, Henry C. Kapteyn, Margaret M. Murnane, and Alexander L. Gaeta. "Intensity Stabilization of Ionizing Pulses in High-Pressure, Gas-Filled Capillaries." In CLEO: QELS_Fundamental Science. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/cleo_qels.2016.fm4a.5.

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3

Parsapajouh, Ali, Siavash Litkouhi, and Bahram Amini. "A Case Study on Excavation Stabilization Using Ground Anchors and High Pressure Injection." In Proceedings of the Fourth International Conference on Grouting and Deep Mixing. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412350.0092.

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4

Newport, Seth, Geoffrey Ormston, Michael Benedict, and Ayyoub Mehdizadeh Momen. "High-Performance Microchannels Development Using Magnetic Stabilization." In ASME 2017 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2017 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/ipack2017-74147.

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Creating a large surface area from a packed bed of particles is a necessary step for many packing, chemical, and heat transfer applications. However, the excessive pressure drop across the packed bed is not desirable in many of these applications. This problem can be addressed by using microchannels instead of the packed bed of particles, providing a high heat transfer rate at the acceptable pressure drop range. Microchannels offer a reduced amount of pressure drop due to their ability to introduce a low resistance flow passage while still providing the large surface area for heat and mass transfer. In this study, a magnetic stabilization process was developed to fabricate microchannels from the fine ferrite particles. The experimental hydrodynamic performance evaluation of such structures is described in this paper. This unique microchannel fabrication method can significantly improve thermal and hydrodynamic performance, while providing additional flexibility to control the porosity of the packed bed of particles.

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5

Lammel, Oliver, Tim Rödiger, Michael Stöhr, Holger Ax, Peter Kutne, Michael Severin, Peter Griebel, and Manfred Aigner. "Investigation of Flame Stabilization in a High-Pressure Multi-Jet Combustor by Laser Measurement Techniques." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26376.

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In this contribution, comprehensive optical and laser based measurements in a generic multi-jet combustor at gas turbine relevant conditions are presented. The flame position and shape, flow field, temperatures and species concentrations of turbulent premixed natural gas and hydrogen flames were investigated in a high-pressure test rig with optical access. The needs of modern highly efficient gas turbine combustion systems, i.e., fuel flexibility, load flexibility with increased part load capability, and high turbine inlet temperatures, have to be addressed by novel or improved burner concepts. One promising design is the enhanced FLOX® burner, which can achieve low pollutant emissions in a very wide range of operating conditions. In principle, this kind of gas turbine combustor consists of several nozzles without swirl, which discharge axial high momentum jets through orifices arranged on a circle. The geometry provides a pronounced inner recirculation zone in the combustion chamber. Flame stabilization takes place in a shear layer around the jet flow, where fresh gas is mixed with hot exhaust gas. Flashback resistance is obtained through the absence of low velocity zones, which favors this concept for multi-fuel applications, e.g. fuels with medium to high hydrogen content. The understanding of flame stabilization mechanisms of jet flames for different fuels is the key to identify and control the main parameters in the design process of combustors based on an enhanced FLOX® burner concept. Both experimental analysis and numerical simulations can contribute and complement each other in this task. They need a detailed and relevant data base, with well-known boundary conditions. For this purpose, a high-pressure burner assembly was designed with a generic 3-nozzle combustor in a rectangular combustion chamber with optical access. The nozzles are linearly arranged in z direction to allow for jet-jet interaction of the middle jet. This line is off-centered in y direction to develop a distinct recirculation zone. This arrangement approximates a sector of a full FLOX® gas turbine burner. The experiments were conducted at a pressure of 8 bar with preheated and premixed natural gas/air and hydrogen/air flows and jet velocities of 120 m/s. For the visualization of the flame, OH* chemiluminescence imaging was performed. 1D laser Raman scattering was applied and evaluated on an average and single shot basis in order to simultaneously and quantitatively determine the major species concentrations, the mixture fraction and the temperature. Flow velocities were measured using particle image velocimetry at different section planes through the combustion chamber.

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6

Pusey, John, and John Caccese. "Geotechnical Case History for Sinkhole Investigation and Stabilization Methods along a High Pressure Petroleum Pipeline." In National Cave and Karst Research Institute Symposium 2. National Cave and Karst Research Institute, 2013. http://dx.doi.org/10.5038/9780979542275.1108.

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7

Severin, Michael, Oliver Lammel, Holger Ax, Rainer Lückerath, Wolfgang Meier, Manfred Aigner, and Johannes Heinze. "High Momentum Jet Flames at Elevated Pressure: B — Detailed Investigation of Flame Stabilization With Simultaneous PIV and OH-LIF." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-64556.

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A model FLOX® combustor, featuring a single high momentum premixed jet flame, has been investigated using laser diagnostics in an optically accessible combustion chamber at a pressure of 8 bar. The model combustor was designed as a large single eccentric nozzle main burner (Ø 40 mm) together with an adjoining pilot burner and was operated with natural gas. To gain insight into the flame stabilization mechanisms with and without piloting, simultaneous Particle Image Velocimetry (PIV) and OH Laser Induced Fluorescence (LIF) measurements have been performed at numerous two-dimensional sections of the flame. Additional OH-LIF measurements without PIV-particles were analyzed quantitatively resulting in absolute OH concentrations and temperature fields. The flow field looks rather similar for both the unpiloted and the piloted case, featuring a large recirculation zone next to the high momentum jet. However, flame shape and position change drastically. For the unpiloted case, the flame is lifted, widely distributed and isolated flame kernels are found at the flame root in the vicinity of small scale vortices. For the piloted flame, on the other hand, both pilot and main flame are attached to the burner base plate, and flame stabilization seems to take place on much smaller spatial scales with a connected flame front and no isolated flame kernels. The single shot analysis gives rise to the assumption that for the unpiloted case small scale vortices act like the pilot burner flow in the opposed case and constantly impinge and ignite the high momentum jet at its root.

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8

Chi, John N. "Unsteady Loading of Rotor Blades by High Pressure Air Injection." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10465.

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A gas turbine engine consists of three primary components: a compressor, a combustion chamber, and a turbine. The operating range, performance, and reliability of gas turbine engines are limited by aerodynamic instabilities that occur in the compressor at low mass flow rates. Two of such compressor instabilities are rotating stall and surge. The stabilization of compression systems by means of active control has been demonstrated on several research compressors using different actuators such as inlet guide vanes, bleed valves, and air injection to manipulate the compressor flow field. This paper presents experimental and model simulated results of the steady and unsteady behaviors of air injection in high speed axial flow compressors that can be used for feasibility studies and control algorithm development. A control oriented model of the unsteady response of the transonic compressor blade rows to steady air injection is presented. This behavior was modeled by one-dimensional flow in a diffusing passage subject to a time varying inlet flow condition in the rotor relative reference frame. The one-dimensional model was then used to provide simplified input boundary conditions for a computational fluid dynamic (CFD) model that predicted aerodynamic loading on a transonic rotor blade due to steady air injection. The aerodynamic loading on a transonic rotor blade due to steady air injection were then simulated from the computational fluid dynamic (CFD) model. The simulation results for an evenly circumferentially spaced discrete number of jet actuators show that the fluctuating loading due to jet injection are non-sinusoidal and periodic. Total pressure, total temperature, and absolute flow angle survey measurements that map out the effect of high pressure air injection on a transonic compressor rotor for different levels of steady injection and different orientations are also presented.

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9

Maruyama, Naoki, Yuji Masuda, Kazushige Nagata, Yukio Ito, and Masafumi Hirota. "Temperature Stabilization of Pulsating Flow in High Pressure Field Using Coaxial Tube Heat Exchanger with Liquid Oil Tuner." In 10th International Energy Conversion Engineering Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-4076.

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10

Barreto, Andres Felipe Moreno, Giuseppe Vignali, and Luca Sandei. "Effect of High Pressure Processing on enzymatic activity for strawberries, sour cherries and red grapes." In the 7th International Food Operations and Processing Simulation Workshop. CAL-TEK srl, 2021. http://dx.doi.org/10.46354/i3m.2021.foodops.004.

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Color degradation is an important factor that affect the quality and acceptability of fruit juices and purees; several enzymes, as well as the microbial endogenous population are not only responsible for this phenomenon but for changes in flavor and texture. Traditional stabilization methods have been used to preserve these kind of products; however, there is a negative impact on vitamins and bioactive compounds composition. High Pressure Processing (HPP) is a non-thermal alternative that has been applied for the extension of shelf life of fresh products, reducing the adverse effects of classical treatments. The aim of this review is to provide a scientific base on the effect of HPP technology in terms of enzymatic inactivation (peroxidase, polyphenol oxidase, ascorbate oxidase and β-glucosidase) in comparison with a conventional pasteurization process in strawberries, sour cherries and red grapes, and to propose an optimization strategy for the operational parameters to achieve the greatest inactivation

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