The Experts below are selected from a list of 59781 Experts worldwide ranked by ideXlab platform
Patrick Pelayo - One of the best experts on this subject based on the ideXlab platform.
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Maximal lactate steady state does not correspond to a complete physiological steady state.
International journal of sports medicine, 2003Co-Authors: Bertrand Baron, Jeanne Dekerle, Sophie Robin, R. Neviere, Ludovic Dupont, Régis Matran, Jacques Vanvelcenaher, H. Robin, Patrick PelayoAbstract:The purpose of this study was to verify whether the maximal lactate steady state (MLSS) corresponds to a physiological steady state. Eight male trained subjects performed a 30-min test on a cycle ergometer at a constant power corresponding to their own MLSS which had been previously determined. No significant variation was observed between the 10 th and the 30 th min for arterial lactate concentration, redox state, arterial oxygen pressure, arterial oxygen saturation, bicarbonates concentration, base excess, hematocrit, hemoglobin concentration, plasma volume, oxygen uptake, carbon dioxide Output, Gas exchange ratio, minute ventilation, ventilatory equivalents for oxygen and carbon dioxide, and arterial systolic blood pressure values. However, arterial carbon dioxide pressure and pH values were significantly different between the 10 th and the 30 th min (p
Irini Angelidaki - One of the best experts on this subject based on the ideXlab platform.
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Process performance and microbial community structure in thermophilic trickling biofilter reactors for bioGas upgrading
Science of the Total Environment, 2019Co-Authors: Hugo Porté, Panagiotis G. Kougias, Natalia Alfaro, Laura Treu, Stefano Campanaro, Irini AngelidakiAbstract:This study evaluated the process performance and determined the microbial community structure of two lab-scale thermophilic trickling biofilter reactors used for biological methanation of hydrogen and carbon-dioxide for a total period of 94 days. Stable and robust operation was achieved by means of a single-pass Gas flow. The quality of the Output Gas (>97%) was comparable to the methane purity achieved by commercial bioGas upgrading systems fulfilling the specifications to be used as substitute to natural Gas. The reactors' methane productivity reached >1.7 L CH4 /(L R ·d) at hydrogen loading rate of 7.2 L H2 /(L R ·d). The spatial distribution of the microbial consortia localized in the liquid media and biofilm enabled us to gain a deeper understanding on how the microbiome is structured inside the trickling biofilter. Sequencing results revealed a significant predominance of Methanothermobacter sp. in the biofilm. Unknown members of the class Clostridia were highly abundant in biofilm and liquid media, while acetate utilising bacteria predominated in liquid samples.
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Ex-situ bioGas upgrading and enhancement in different reactor systems.
Bioresource Technology, 2016Co-Authors: Panagiotis G. Kougias, Laura Treu, Daniela Peñailillo Benavente, Stefano Campanaro, Irini AngelidakiAbstract:Abstract BioGas upgrading is envisioned as a key process for clean energy production. The current study evaluates the efficiency of different reactor configurations for ex-situ bioGas upgrading and enhancement, in which externally provided hydrogen and carbon dioxide were biologically converted to methane by the action of hydrogenotrophic methanogens. The methane content in the Output Gas of the most efficient configuration was >98%, allowing its exploitation as substitute to natural Gas. Additionally, use of digestate from bioGas plants as a cost efficient method to provide all the necessary nutrients for microbial growth was successful. High-throughput 16S rRNA sequencing revealed that the microbial community was resided by novel phylotypes belonging to the uncultured order MBA08 and to Bacteroidales . Moreover, only hydrogenotrophic methanogens were identified belonging to Methanothermobacter and Methanoculleus genera. Methanothermobacter thermautotrophicus was the predominant methanogen in the biofilm formed on top of the diffuser surface in the bubble column reactor.
Bertrand Baron - One of the best experts on this subject based on the ideXlab platform.
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Maximal lactate steady state does not correspond to a complete physiological steady state.
International journal of sports medicine, 2003Co-Authors: Bertrand Baron, Jeanne Dekerle, Sophie Robin, R. Neviere, Ludovic Dupont, Régis Matran, Jacques Vanvelcenaher, H. Robin, Patrick PelayoAbstract:The purpose of this study was to verify whether the maximal lactate steady state (MLSS) corresponds to a physiological steady state. Eight male trained subjects performed a 30-min test on a cycle ergometer at a constant power corresponding to their own MLSS which had been previously determined. No significant variation was observed between the 10 th and the 30 th min for arterial lactate concentration, redox state, arterial oxygen pressure, arterial oxygen saturation, bicarbonates concentration, base excess, hematocrit, hemoglobin concentration, plasma volume, oxygen uptake, carbon dioxide Output, Gas exchange ratio, minute ventilation, ventilatory equivalents for oxygen and carbon dioxide, and arterial systolic blood pressure values. However, arterial carbon dioxide pressure and pH values were significantly different between the 10 th and the 30 th min (p
Kamal Ad-din Abedi - One of the best experts on this subject based on the ideXlab platform.
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Chlorobenzene degeradation by non-thermal plasma combined with EG-TiO2/ZnO as a photocatalyst: Effect of photocatalyst on CO2 selectivity and byproducts reduction
Journal of hazardous materials, 2016Co-Authors: Farshid Ghorbani Shahna, H. Ebrahimi, B. Jaleh, A. Bahrami, Iraj Alimohammadi, Rassuol Yarahmadi, Mastaneh Gandomi, Kamal Ad-din AbediAbstract:The non-thermal plasma (NTP) technique, which suffers from low selectivity in complete oxidation of volatile organic compounds to CO2 and H2O, creates unwanted and harmful byproducts. NTP in concert with photocatalyst can resolve this limitation due to additional oxidation. TiO2 and ZnO nanoparticles were coated on the surface of the expanded graphite and placed downstream of the NTP reactor under UV light. In this study, to compare the performance of NTP and the combined system, chlorobenzene removal, selectivity of CO2 and byproducts formation were investigated. The results showed that the combined system enhanced both the removal efficiency and CO2 selectivity. The Output Gas of the NTP reactor contained chlorobenzene, phosgene, O3, NO, NO2, CO, CO2, HCL and CL. The bulk of these byproducts was oxidized on the surface of the nanocomposite; as a result, the content of the byproducts in the Output Gas of the combined system decreased dramatically. The removal efficiency and CO2 selectivity increased by rising the applied voltage and residence time because the collision between active species and pollutant molecules increases. Based on these results, the combined system is preferred due to a higher performance and lower formation of harmful byproducts.
A. Bahrami - One of the best experts on this subject based on the ideXlab platform.
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Chlorobenzene degeradation by non-thermal plasma combined with EG-TiO2/ZnO as a photocatalyst: Effect of photocatalyst on CO2 selectivity and byproducts reduction
Journal of hazardous materials, 2016Co-Authors: Farshid Ghorbani Shahna, H. Ebrahimi, B. Jaleh, A. Bahrami, Iraj Alimohammadi, Rassuol Yarahmadi, Mastaneh Gandomi, Kamal Ad-din AbediAbstract:The non-thermal plasma (NTP) technique, which suffers from low selectivity in complete oxidation of volatile organic compounds to CO2 and H2O, creates unwanted and harmful byproducts. NTP in concert with photocatalyst can resolve this limitation due to additional oxidation. TiO2 and ZnO nanoparticles were coated on the surface of the expanded graphite and placed downstream of the NTP reactor under UV light. In this study, to compare the performance of NTP and the combined system, chlorobenzene removal, selectivity of CO2 and byproducts formation were investigated. The results showed that the combined system enhanced both the removal efficiency and CO2 selectivity. The Output Gas of the NTP reactor contained chlorobenzene, phosgene, O3, NO, NO2, CO, CO2, HCL and CL. The bulk of these byproducts was oxidized on the surface of the nanocomposite; as a result, the content of the byproducts in the Output Gas of the combined system decreased dramatically. The removal efficiency and CO2 selectivity increased by rising the applied voltage and residence time because the collision between active species and pollutant molecules increases. Based on these results, the combined system is preferred due to a higher performance and lower formation of harmful byproducts.
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Decomposition of Gas-phase chloroform using nanophotocatalyst downstream the novel non-thermal plasma reactor: by-products elimination
International Journal of Environmental Science and Technology, 2015Co-Authors: F. Ghorbani Shahna, H. Ebrahimi, B. Jaleh, A. BahramiAbstract:Combination the non-thermal plasma technique by photocatalytic oxidation can enhance volatile organic compounds degradation. In this study, the decomposition of chloroform vapors in a novel non-thermal plasma reactor as well as an integrated system of this reactor in conjunction with the photocatalysis process was investigated. Expanded graphite was used as discharge electrode of dielectric barrier discharge reactor and the support of TiO_2 and ZnO catalysts as well. Results showed that chloroform degradation increased in hybrid system. The non-thermal plasma reactor had high content of NO and NO_2, whereas the concentration of these two pollutants dropped dramatically in hybrid system; moreover, the generated ozone from the non-thermal plasma process was degraded on the photocatalyst and consequently was not detected in the Output Gas of the combined system. The generated organic by-products in non-thermal plasma process (phosgene and trichloroacetaldehyde) were reoxidized with un-oxidized chloroform in the second stage of the combined system. This increased the selectivity of CO_2 and Cl_2.