National Repository of Grey Literature 48 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Utilization of solid sorbents for high temperature removal of halogenated compounds from pyrolysis of waste plastic
Šrámek, Vít
This work focuses on high temperature removal of halogenated compounds in model mixture with hydrocarbons and other compounds. The study was performed in laboratory apparatus under controlled temperature and gaseous mixture composition.\n
Influence of sorbent type on dehalogenation of reducing gas without condensing fraction.
Šrámek, Vít ; Skoblia, S. ; Staf, M. ; Beňo, Z. ; Pohořelý, Michael
Chemical recycling of plastics is one of possible option to process large amount of currently difficultly recycled plastic waste. It would be possible to fulfil goals of the amount of recycled waste by means of chemical recycling. Principle of chemical recycling is conversion of plastic waste to basic hydrocarbon substance that could be used in refineries or petrochemical industry. The main technological challenge is the presence of halogens in plastic waste (in plastics as substances containing chlorine in form of PVC or brome in form of additives/flame retardants). During chemical recycling via pyrolysis, these substances can transfer to products and cause problems in succeeding technologies (corrosion, poisoning of catalysts etc.). One of the solutions how to eliminate these unwanted substances could be high temperature sorption of primal pyrolysis gas on sorbents before its condensation. Experiments with model gas containing halogenated compounds and different inorganic sorbents were conducted for this purpose. Gained results allowed us to narrow down the amount of sorbents suitable for high temperature removal of halogenated compounds from primal pyrolysis gas produced during pyrolysis of plastics.
The role of ATP-MgCl2 in ischemia-reperfusion and sepsis
Nalos, Marek ; Kasal, Eduard (advisor) ; Matějovič, Martin (referee) ; Šrámek, Vladimír (referee)
The previously reported multiple beneficial effects of ATP-MgCl2 were tested in two clinically relevant large animal models. We observed mainly cardiovascular effects of ATP-MgCl2 likely related to purinergic receptors stimulation. Adding ATP and its metabolite adenosine to ex vivo LPS stimulated whole human blood cultures and measuring cytokine secretion we have further tested whether modulation of inflammation might be responsible for some of the ATP-MgCl2 effects. The results are summarized as follows: 1. Infusing ATP-MgCl2 intravenously in a porcine I-R injury model of thoracic aortic cross clamping provides better cardiovascular stability compared to currently used standard agent sodium nitroprusside. Although ATP-MgCl2 led to reduced gut lactate release we could not demonstrate any beneficial effects on numerous markers of reperfusion injury. Moreover the combination of sodium nitroprusside with esmolol provided hemodynamic control superior to ATP-MgCl2. 2. In long term hyperdynamic porcine model of sepsis ATP-MgCl2 increased portal venous blood flow, reduced ileal mucosal-arterial pCO2 gap and preserved hepatic arterial buffer response as well as metabolic coupling between lactate release from the gut and its utilization by the liver. Despite the beneficial effects of ATP-MgCl2 on hepatosplanchnic...
Optimization of Hemodynamics of Trauma Patients in Intensive Care Using Transesophageal Doppler Monitoring
Pradl, Richard ; Chytra, Ivan (advisor) ; Málek, Jiří (referee) ; Šrámek, Vladimír (referee)
Esophageal Doppler was confirmed as a useful non-invasive tool for management of fluid replacement in elective surgery. The aim of this study was to assess the effect of early optimization of intravascular volume using esophageal Doppler on blood lactate levels and organ dysfunction development in comparison with standard hemodynamic management in multiple-trauma patients. This was a randomized controlled trial. Multiple-trauma patients with blood loss of more than 2,000 ml admitted to the intensive care unit (1CU) were randomly assigned to the protocol group with esophageal Doppler monitoring and to the control group. Fluid resuscitation in the Doppler group was guided for the first 12 hours of ICU stay according to the protocol based on data obtained by esophageal Doppler, whereas control patients were managed conventionally. Blood lactate levels and organ dysfunction during ICU stay were evaluated. Eighty patients were randomly assigned to Doppler and 82 patients to control treatment. The Doppler group received more intravenous colloid during the first 12 hours of ICU stay (1,667±426 ml versus 682±322 ml; p < 0,0001), and blood lactate levels in the Doppler group were lower after 12 and 24 hours of treatment than in the control group (2,92±0,54 mmol/1 versus 3,23±0,54 mmol/1 [p = 0,0003] and 1,99±0,44...
Hemo elimination method in the treatment of sepsis and early multi-organ dysfunction
Sýkora, Roman ; Matějovič, Martin (advisor) ; Chytra, Ivan (referee) ; Maňák, Jan (referee) ; Šrámek, Vladimír (referee)
The most common cause of death in patients with sepsis/septic shock is deterioration of the function of multiple organs, termed multiple organ dysfunction syndrome. Although our understanding of mechanisms involved in the pathophysiology of sepsis-induced tissue damage has improved substantially, therapy of these syndromes still remains largely supportive. The hallmark of sepsis is an overwhelming systemic production of both pro- and anti-inflammatory mediators leading to generalized endothelial and epithelial damage, microcirculatory-mitochondrial distress, altered endocrine and coagulation homeostasis and cellular immune hyporesponsiveness. Therefore, the hypothesis that modulation of this excessive immunological and biological response to infection might improve patient outcome appears reasonable. Hemoelimination techniques represent biologically plausible way to provide non-specific removal of soluble pro- and anti-inflammatory mediators, although the concept of blood purification in sepsis remains a matter of considerable debate. The aim of this thesis was to elucidate effects of 1) high volume hemofiltration (HVHF) and 2) coupled plasma filtration adsorption (CPFA) in a long-term, hyperdynamic porcine septic shock model, which fulfils the criteria for human sepsis. We hypothesized that both HVHF and...
High Temperature Removal of Halogenated Compounds from Pyrolysis of Waste Plastic Polymers.\n
Šrámek, Vít
In this research the performance of selected adsorbents was tested in laboratory apparatus under model conditions with the mixture of\nHCl and simple non-condensing hydrocarbons.
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Forest condition monitoring in the Czech Republic: Annual report ICP Forests 2002
Boháčová, Ludmila ; Uhlířová, Hana ; Lomský, Bohumír ; Buriánek, V. ; Damašková, J. ; Fabiánek, P. ; Fadrhonsová, V. ; Hejdová, J. ; Šrámek, V. ; Vejpustková-Kroupová, M.
In the Year-book there are the methods of evaluation and the results presented, as obtained in assessment of the forest state within the Level I and Level II plots.
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Forest condition monitoring in the Czech Republic: Annual report Forest Focus – Data 2004
Boháčová, Ludmila ; Uhlířová, Hana ; Šrámek, Vít ; Buriánek, V. ; Fabiánek, P. ; Hejdová, J. ; Kapitola, P. ; Lachmanová, Z. ; Lomský, B. ; Neumann, L. ; Novotný, R.
In the yearbook the methods of assessment and evaluation are presented, and the results in the systematic network of plots and intensive monitoring plots (Level I and Level II).
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Forest condition monitoring in the Czech Republic: Annual report Forest Focus/ICP Forests 2005
Boháčová, Ludmila ; Uhlířová, Hana ; Šrámek, Vít ; Buriánek, V. ; Čapek, M. ; Fabiánek, P. ; Hejdová, J. ; Kapitola, P. ; Lachmanová, Z. ; Lomský, B. ; Maxa, M. ; Vortelová, L.
In the yearbook the methods of assessment and evaluation are presented, and the results in the systematic network of plots and intensive monitoring plots (Level I and Level II).
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7 Šrámek, Vladimír
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