Tesis sobre el tema "Oxidation of VOC"
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Holzer, Frank. "Oxidation von organischen Verbindungen unter Nutzung von porösen und unporösen Feststoffen im nichtthermischen Plasma". [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970941927.
Texto completoReed, Corey William. "VOC Catalytic Oxidation on Manganese Oxide Catalysts Using Ozone". Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/28000.
Texto completoPh. D.
Osička, Tomáš. "Katalytická oxidace VOC na komerčně dostupných katalyzátorech". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241878.
Texto completoKumar, Sachin. "Gas Phase Oxidation of Dimethyl Sulfide by Titanium Dioxide Based Catalysts". Miami University / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=miami1081780904.
Texto completoGao, Yao. "A Novel Multifunctional Photocatalytic Oxidation (PCO) Gel Preventing Mold/Mildew Growth and Volatile Organic Compound (VOC) Emission". Scholarly Repository, 2011. http://scholarlyrepository.miami.edu/oa_dissertations/623.
Texto completoFerrandon, Magali. "Mixed metal oxide - noble metal catalysts for total oxidation of volatile organic compounds and carbon monoxide". Doctoral thesis, Stockholm, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3156.
Texto completoSihaib, Zakaria. "Oxidation of toluene traces in gas phase in presence of manganese-oxide based catalysts : relationship structure-activity". Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1029.
Texto completoIn the first part of my work, I have prepared four different catalysts based on manganese oxides: a perovskite (LaMnO3), via sol-gel method; a simple oxide (Mn2O3), by rapid method and an Octahedral Molecular Sieve (OMS-2) by two different preparation methods, via solid state (OMSs) and hydrothermal method (OMSh). The physicochemical properties of these catalysts were characterized by X-ray diffraction (XRD), N2 adsorption–desorption, TGA/DTA, ICP-OES and H2-TPR. Their catalytic performances were evaluated in the oxidation of toluene. Three consecutive catalytic cycles were performed for each catalyst in order to reach steady state performances. In order to assess the stability of the catalysts under reaction conditions, the catalytic performances were studied upon long-term experiments running for 24 h at 25% of toluene conversion. Tests of toluene oxidation over a typical industrial catalyst, such as a commercial Pd/Al2O3 catalyst containing 0.78 wt% Pd, were also performed for comparison purposes. The crystalline features detected in the XRD patterns are well consistent with the formation of the desired structures. Based on their specific surface area and their low-temperature reducibility, the catalysts were ranked as follows: OMSs> Mn2O3> OMSh> LaMnO3. This trend was in good agreement with the performances observed in the catalytic removal of toluene. A kinetic model was proposed and a good agreement was obtained upon fitting with the experimental data. In the second part of my work, LaMnO3 (LM) catalysts with molar ratio of citric acid (CA) to metal nitrates (Mn and La) ranging from 0.5 to 2 (LM 0.5 to LM 2) were synthesized by citrate sol–gel method, in order to study effect of citric acid ratio on the physico-chemical properties and the catalytic performances. The physicochemical properties of these catalysts were characterized by X-ray diffraction (XRD), N2 adsorption–desorption and by inductively coupled plasma atomic emission spectroscopy (ICP-AES). Over selected samples, additional characterizations by thermogravimetric and differential thermal analysis (TGA/DTA), temperature-programmed reduction by hydrogen (H2-TPR) and X-ray photoelectron spectroscopy (XPS) were carried out. The results show that the molar ratio of citric acid to metal nitrates significantly influenced the TGA/DTA profile of gels along with the physico-chemical properties of the catalysts. The crystalline features detected by XRD are well consistent with the formation of LaMnO3 perovskite phase. Small features of Mn2O3 were detected in the diffraction patterns of all LM catalysts except for high CA/Mn+La nitrates molar ratio (1.9 and 2.0). Conversely, La2O3 peaks appeared for values ranging from 1.6 to 2, the highest intensity being detected at molar ratio equal to 2. The catalytic performances were evaluated in the oxidation of toluene, performing three consecutive catalytic cycles in order to reach steady-state performances. In order to assess the stability of the catalysts under reaction conditions, long-term experiments running for 24 h at 17 % of toluene conversion were carried out. The catalysts LM1.2, LM1.3 and LM1.5 showed the best catalytic performances in terms of toluene conversion, LM0.8 was poor performing, while LM1 and LM1.7 exhibited an intermediate behaviour
Brummer, Vladimír. "Zařízení pro zneškodňování odpadních plynů katalytickou oxidací". Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-320159.
Texto completoPommer, Linda. "Oxidation of terpenes in indoor environments : A study of influencing factors". Doctoral thesis, Umeå University, Ecology and Environmental Science, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-29.
Texto completoIn this thesis the oxidation of monoterpenes by O3 and NO2 and factors that influenced the oxidation were studied. In the environment both ozone (O3) and nitrogen dioxide (NO2) are present as oxidising gases, which causes sampling artefacts when using Tenax TA as an adsorbent to sample organic compounds in the air. A scrubber was developed to remove O3 and NO2 prior to the sampling tube, and artefacts during sampling were minimised when using the scrubber. The main organic compounds sampled in this thesis were two monoterpenes, alfa-pinene and delta-3-carene, due to their presence in both indoor and outdoor air. The recovery of the monoterpenes through the scrubber varied between 75-97% at relative humidities of 15-75%.
The reactions of alfa-pinene and delta-3-carene with O 3, NO2 and nitric oxide (NO) at different relative humidities (RHs) and reaction times were studied in a dark reaction chamber. The experiments were planned and performed according to an experimental design were the factors influencing the reaction (O3, NO2, NO, RH and reaction times) were varied between high and low levels. In the experiments up to 13% of the monoterpenes reacted when O3, NO2, and reaction time were at high levels, and NO, and RH were at low levels. In the evaluation eight and seven factors (including both single and interaction factors) were found to influence the amount of alfa-pinene and delta-3-carene reacted, respectively. The three most influencing factors for both of the monoterpenes were the O 3 level, the reaction time, and the RH. Increased O3 level and reaction time increased the amount of monoterpene reacted, and increased RH decreased the amount reacted.
A theoretical model of the reactions occurring in the reaction chamber was created. The amount of monoterpene reacted at different initial settings of O3, NO2, and NO were calculated, as well as the influence of different reaction pathways, and the concentrations of O3 and NO2, and NO at specific reaction times. The results of the theoretical model were that the reactivity of the gas mixture towards alfa-pinene and delta-3-carene was underestimated. But, the calculated concentrations of O3, NO2, and NO in the theoretical model were found to correspond to a high degree with experimental results performed under similar conditions. The possible associations between organic compounds in indoor air, building variables and the presence of sick building syndrome were studied using principal component analysis. The most complex model was able to separate 71% of the “sick” buildings from the “healthy” buildings. The most important variables that separated the “sick” buildings from the “healthy” buildings were a more frequent occurrence or a higher concentration of compounds with shorter retention times in the “sick” buildings.
The outcome of this thesis could be summarised as follows;
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Vilasi, Pauline. "Synthèse de nouveaux catalyseurs nanostructurés par dépôts physiques à base de pérovskite de lanthane". Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCA041.
Texto completoThis work was made in the frame of a scientific research relationships between the laboratory FEMTO-ST of the Technological University of Belfort-Montbéliard and the laboratory IRCELYON of the Claude Bernard University of Villeurbanne. This study aims at characterizing the feasibility of nanostructured lanthanum cobaltite thin films via magnetron sputtering. Indeed, it is well known these materials have interesting catalytic properties regarding the oxidation of volatile organic compounds such as propene (C3H6) or carbon monoxide (CO), the latter being the main source of air pollution. First, it has been shown that lanthanum cobaltites of formula LaCoO3 are not efficient for this type of application. The chemical composition of this material was then modified by incorporating silver so as to vary the physicochemical properties of the films and increase their catalytic performance. In consequence, the morphology of the films was directly impacted by the introduction of Ag since it evolved from a dense system to a "nanowire" system. Another series of deposits based on cobaltite modified by both silver and cerium additions have been also developed and tested during catalytic tests. It should be noted that the Ag containing thin films of LaCoO3 are rather efficient and then promising since they have catalytic performances close to those of platinum (the reference catalyst). Concerning the Ag and Ce containing perovskite films, although they still have this peculiar nanowired morphology, their chemical compositions have to be optimized in order to increase their catalytic activities
GHOSH, MONOJ. "Fabrication of Inorganic Oxide Nanofibers Using Gas Jet Fiber Spinning Process and Their Applications in Photocatalytic Oxidation". University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1478726324293037.
Texto completoFreisleben, Vít. "Studie potenciálu integrovaného řešení jednotky „waste-to-energy“". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400841.
Texto completoSedjame, Henri-Joël. "Élaboration de matériaux catalytiques pour l'élimination de polluants organiques en phase gaz". Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2283/document.
Texto completoThe results presented in this manuscript have aimed at preparing catalytic materials based on noble metals for the removal of volatile organic compounds (VOC). Thus, different platinum based catalysts have been prepared and their catalytic performances have been evaluated for n-butanol and acetic acid oxidation. A first study on oxidative and non-oxidative removal of n-butanol over alumina supported platinum based catalysts has been performed. This work focused on the study of the effect of the different parameters involved in the reaction (oxygen, water, metal). The adsorption-desorption phenomenon of the pollutant on the catalyst surface has also been studied.Inspired by the literature on the specific redox properties of ceria, the work was then focused on the effect of the addition of CeO2 to Pt/Al2O3 catalysts for n-butanol and acetic acid oxidation. The modification of the redox and acid-base properties as well as that of the catalytic performances of the material with the addition of CeO2 allowed to establish a relationship between catalytic oxidation activities, oxygen storage capacity and basicity. This correlation has been confirmed in the last study performed on the monolithic catalysts coated with different materials (Pt/Al2O3, Pt/CeO2, Pt/ZrO2, Pt/Al2O3-CeO2, Pt/Al2O3-ZrO2 and Pt/CeO2-ZrO2)
Vitola, Pasetto Leticia. "Étude et développement d'un procédé de traitement des odeurs par oxydation à l'ozone : application aux effluents gazeux d'usines de production de superphosphate". Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0061.
Texto completoIn the superphosphate-based fertilizers production process, the attack of phosphate rock by sulfuric acid generates odorous gaseous by-products. Although their emissions are within regulatory limits, superphosphate fertilizer plants are likely to cause odor nuisance to residents. This thesis proposes to study the feasibility of a process of odor treatment by ozonation in homogeneous gas phase. A first step of prioritization of the chemical compounds with the most important odorous potential has been realized. This ranking was established from a technical report provided by our industrial partner based on a campaign of olfactometric measurement and chemical characterization of the gases emitted by the chimney of a superphosphate fertilizer production plant. From the calculation of the odor activity value (OAV), two families of compounds were targeted: sulfur compounds - represented by hydrogen sulphide (H2S), ethylmethyl sulphide (MES) and dimethyl disulfide (DMDS) - and aldehydes (represented by propanal and butanal). Two analytical techniques (GC/FID and SIFT/MS) were applied in order to evaluate the elimination performance of these compounds, the difficulty of analyzing a gaseous matrix containing ozone having been demonstrated. Thus, ozone interference on GC/FID analysis of aldehydes has been identified. The SIFT/MS technique, in turn, required significant development. The ozonation of model gaseous effluents was carried out following the elimination of the target compounds under different operating conditions (residence time, reactor temperature, ozone concentration and moisture) in an experimental field compatible with the industrial constraints. The sulfur compounds exhibited high removal rates, particularly in the case of H2S, whose conversions reached about 80%. Organic monosulfides (MES) and disulfides (DMDS) were less reactive to ozone, as conversions remained quite low (around 30% for the same level of O3/sulfur ratio). In the range of operating conditions used, neither the moisture nor the residence time in the reactor showed considerable influence. The ozone concentration is the most influential process parameter, having a positive effect on the conversion rates of the three sulfur compounds studied. Meanwhile, for DMDS, an increase in reactor temperature also improved the conversion. Overall, the highest conversion rates were obtained for the highest O3/sulfur ratios and reactor temperature. Conversely, even when the most favorable reaction conditions have been applied (highest temperature and ozone concentration), the aldehydes have been inert to ozone. Despite the low conversions obtained, the use of SIFT/MS has identified the main by-products of the ozone-sulfur compounds gas phase reaction as methylethylsulfoxide (MESO), methylethylsulfone (MESO2), dimethyl thiosulfinate (DMSOS), isomers of dimethyl thiosulfonate (DMSO2S), dimethyldisulfoxide (DM(SO)2) and also sulfur dioxide (SO2) and trioxide (SO3). The odors treatment process by direct ozonation of the gases at the outlet of industrial chimney thus appears difficult to envisage because of the low efficiency of malodorous compounds elimination demonstrated in our tests. On the other hand, this technique coupled with chemical absorption could be interesting to eliminate the olfactory nuisances with a good efficiency
Olivet, Lilian. "Élaboration de matériaux innovants pour l'élimination de polluants organiques de l'air intérieur : application à l'oxydation catalytique du formaldéhyde". Thesis, Poitiers, 2019. http://www.theses.fr/2019POIT2312.
Texto completoAir pollution was considered responsible for 7 million premature deaths in 2015 and comes from two main sources: outdoor and indoor air. Indeed, the lack of air renewal in confined spaces such as houses, offices or schools leads to higher pollutant concentrations than in open spaces. Volatile organic compounds are considered to be one of the largest families of pollutants. Among them, formaldehyde, which causes irritation at low levels and has recently been classified as a carcinogenic 1B, can be found in significant amounts in confined spaces following combustion phenomena, from plastics, wooden furniture, cleaning products or insulating materials.Heterogeneous catalysis can be an effective way to remove these harmful molecules by transforming formaldehyde into carbon dioxide at the lowest temperature possible. In order to replace noble metals, whose activity is very high but whose cost and rarity are obstacles to their use, the performances of 3 families of materials were discussed during this work. At first, the use of zeolites of the H-ZSM5 type modified by post synthesis isomorphic substitution seemed to be an interesting solution due to the adsorbent properties of the parent material on the one hand and on the other hand thanks to the oxidative function provided by the presence of new elements such as cobalt, iron, manganese or even cerium. The modification of the parent zeolite led to a clear improvement in catalytic activity since the total conversion was achieved in the case of zeolites modified with manganese, iron and cerium from 300°C for the most active sample while the parent material allowed a conversion of only 70% at 500°C. However, the manganese sample stood out for its much higher activity than the other materials in the series. However, the catalytic activities observed were far from the performance observed on samples containing noble metals.A second part of this study concerned materials based on cerium oxides which also seemed to be good candidates for oxidation reactions due to their ability to store and remove oxygen. These materials, cerina-zirconia doped with copper, cobalt, iron or manganese, prepared by an epoxid sol-gel method, showed that the synthesis conditions used mainly led to the production of mixed non-homogeneous oxides. Catalytic tests have shown that the addition of a transition metal to ceria-zirconia materials can improve their catalytic activity. The most active material for the oxidation reaction of formaldehyde was copper-containing material. The main improvement was the selectivity of the reaction. Indeed, doping with these transition metals mainly leads to the formation of CO2 while forming formic acid and CO, but also to reduction product, methanol, which confirms one of the few studies on the subject in the litterature.Finally, previous studies having shown the existence of a synergistic effect in CuO-ZnO-Al2O3 materials for the hydrogenation reaction of CO2 to methanol, a more exploratory part was then dedicated to the study of these solids in the catalytic oxidation reaction of formaldehyde. It has been observed that materials containing copper oxide provide the best catalytic activities while avoiding the formation of undesirable reaction co-products. This study showed the high potential of these materials for the oxidation of formaldehyde with cheap, very abundant, active and highly CO2 selective metals, thus allowing to reduce indoor pollution
Silva, Thalita Oliveira da. "Estudo da emissão de aldeídos e COV por óleos de dendê e soja em diferentes condições, sob aquecimento a temperatura de processos de fritura". Programa de Pós-Graduação em Química da UFBA, 2007. http://www.repositorio.ufba.br/ri/handle/ri/10017.
Texto completoMade available in DSpace on 2013-04-23T14:07:52Z (GMT). No. of bitstreams: 1 Thalita Silva.pdf: 824830 bytes, checksum: 144a9fb3d8d0b2ef49b28207c4f7d487 (MD5) Previous issue date: 2007
O consumo de frituras é significativo no hábito dos brasileiros e tem aumentado nos últimos anos, isto por ser este um método rápido de preparação e por conferir características agradáveis de aroma e sabor aos alimentos fritos. Durante o processo de fritura, os óleos vegetais são continuamente ou repetidamente expostos a temperaturas elevadas, na presença de oxigênio atmosférico, levando os mesmos à degradação por diferentes tipos de reação. Alguns dos produtos de degradação formados, como por exemplo compostos carbonílicos, como formaldeído, acetaldeído e acroleína, podem ter efeitos adversos sobre a saúde humana. Neste trabalho determinou-se as taxas de emissão de compostos carbonílicos (CC), produzidos por óleos de dendê e soja quando submetidos a aquecimento a 180°C e exposição ao ar por diferentes intervalos de tempo, em processos contínuo e descontínuo e diferentes razões superfície:volume (S/V). Os CC foram coletados e derivatizados em cartuchos de sílica funcionalizados com C18 e impregnados com solução ácida de 2,4-DNPH, sendo a seguir extraídos e analisados por CLAE-DAD e, em alguns casos, CLAE-EM com ionização por eletrospray. Dentre os CC identificados nas emissões, destacaram - se no óleo de dendê, formaldeído; acetaldeído; acroleína; propanal; butanal; pentanal; hexanal; (E)-2-heptenal; heptanal; (E)-2-octenal; octanal; nonanal e (E)-2-decenal, enquanto no óleo de soja destacaram-se formaldeído; acetaldeído; acroleína; hexanal e (E)-2-heptenal. Dentre os quantificados, o que apresentou as maiores taxas de emissão nos dois óleos, nas três relações S/V estudadas, foi a acroleína, emitida em maiores taxas pelo óleo de soja. Em seguida, vieram o hexanal e o (E)-2- heptenal. No estudo da influência da relação S/V, as taxas de emissão estiveram, em geral, diretamente relacionadas à razão superfície/volume de óleo utilizado, embora CC saturados e insaturados tenham se comportado de maneira diferente frente à oxidação. Durante aquecimento descontínuo, houve uma tendência ao aumento nas taxas de emissão, ao longo do tempo, para os aldeídos saturados. Aldeídos insaturados, ao contrário, tiveram uma diminuição ao longo do tempo, devida provavelmente à alta reatividade da dupla ligação presente nestes compostos. Outros compostos orgânicos voláteis (COV) foram avaliados qualitativamente por extração do headspace e análise por CGAR-EM. As principais classes de compostos identificadas foram, mais uma vez, aldeídos alifáticos saturados e insaturados, embora também álcoois insaturados, ácidos carboxílicos e o 2-pentil-furano, todos provenientes de degradação lipídica. Finalmente, esse estudo mostra que a relação superfície/volume, o tempo de fritura, a forma de aquecimento (contínua ou descontínua), o tipo de óleo utilizado e a presença ou não de antioxidantes são fatores importantes na degradação dos óleos vegetais. Vale ressaltar que embora as emissões de acroleína e de outros aldeídos possam ser elevadas mesmo após períodos curtos de aquecimento do óleo, isso não corresponde necessariamente à altas exposições pelos trabalhadores em cozinha, uma vez que essas vão ser afetadas por outros fatores, tais como o grau de ventilação/exaustão do ar no ambiente. Todavia, elas podem servir como alerta para ações de prevenção.
Salvador
Pham, Huu Thien. "Contribution à l'étude de la dépollution de l'air chargé en composés organiques volatils par un procédé associant un plasma de décharge à barrière diélectrique impulsionnelle et des catalyseurs". Thesis, Orléans, 2014. http://www.theses.fr/2014ORLE2022/document.
Texto completoThe focus of this thesis is the application of non-thermal plasma and catalysis in chemical processing, in particular for the removal of Volatile Organic Compounds (VOC) diluted in air. In a first part, the oxidation of three pollutants (methane, propene, and toluene) is studied experimentally in a pulsed dielectric barrier discharge (DBD) reactor and in a catalyst reactor working independently. In a second part, a hybrid plasma-catalyst reactor either in a single-stage or in a two-stages configuration, in which the catalyst is located inside or downstream from the plasma reactor, respectively. Catalyst materials based on Pd, Mn, Cu, and Co supported on alumina beads were tested and characterized by ICP-OES, TEM/EDX, XRD, XPS, and DRIFTS. Products were analyzed and quantified by infrared spectroscopy. Achieved VOCs removal efficiencies and CO/CO2 selectivity, as well as nature and concentrations of the formed products, were evaluated as function of many factors, particularly the specific input energy, the gas temperature, the initial VOCs concentration, the nature of catalyst (size support, metal loading), and the hourly space velocity. It has been successfully demonstrated that the combination of plasma and catalyst in the both configurations has many benefits compared to traditional thermal-catalysis and plasma alone treatment including a lowering of the catalyst operating temperature, an improvement of the conversion of VOCs at similar temperatures, and a better end-products selectivity and energy efficiency. The mutual interaction lead to a synergistic effect in plasma-catalysis especially when the discharge is in direct contact with the catalyst whatever the VOCs studied
Brandt, Cirsten Maja. "Oxidation und epitaktische Oxidation von Nickel und Nickellegierungen". [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=966154002.
Texto completoRaciulete, Monica. "Synthèse de matériaux nano structurés dans des solvants non aqueux". Phd thesis, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00809196.
Texto completoWölk, Hans-Jörg. "Katalytisch-induzierte Änderungen der Morphologie von Kupferkatalysatoren". [S.l.] : [s.n.], 2002. http://edocs.tu-berlin.de/diss/2002/woelk_hans.pdf.
Texto completoFigueira, Tiago Rezende [UNESP]. "Efeito do exercício prévio sobre os parâmetros da cinética do VO2 durante o exercício moderado em ciclistas e indivíduos sedentários". Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/87431.
Texto completoCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O objetivo deste estudo foi analisar a influência do estado de treinamento aeróbio sobre os efeitos do exercício prévio nos parâmetros da cinética do consumo de oxigênio (VO2) durante o exercício moderado. Para isto, 14 voluntários não treinados (GNT: massa corporal, 81,2 + 10,3 kg; estatura, 1,78 + 0,07 m; idade, 21,2 + 4,0 anos) e outros 14 ciclistas treinados (GT: massa corporal, 68,2 + 6,9 kg; estatura, 1,75 + 0,05 m; idade, 21,4 + 3,5 anos) (indivíduos com no mínimo dois anos de engajamento no treinamento e competições) realizaram um teste progressivo até a exaustão voluntária para a determinação do VO2 máximo (VO2max) e do limiar de lactato (LL). Posteriormente, realizaram em diferentes dias e em ordem aleatória, duas transições repouso-exercício (seis minutos na carga correspondente a 80% do LL), sendo uma delas precedida em oito minutos pelo exercício prévio (dois tiros de um minuto na carga correspondente a 120% VO2max, com um minuto de recuperação entre eles). Durante estes testes foram coletadas amostras de sangue capilar para a determinação da concentração de lactato sanguíneo e também monitoradas as variáveis cardiopulmonares a cada incursão ventilatória. O VO2 de repouso foi aumentado (p < 0,05) pelo exercício prévio (EPS) em ambos os grupos (GNT: 0,836 + 0,061 vs. 0,506 + 0,194 L/min; GT: 0,373 + 0,055 vs. 0,577 + 0,137 L/min). O tempo da resposta média do VO2 (constante tempo da resposta geral 0-360 s) foi significantemente reduzido na condição EPS apenas para o GNT (32,9 + 7,4 vs. 28,6 + 7,7 s; p < 0,05; GT: 25,7 + 5 vs. 23,3 + 5,8 s; p > 0,05). No GT, a Assimptota (VO2 médio dos últimos dois min de exercício) mostrou-se significantemente...
The aim of this study was to analyze the influence of aerobic fitness on the effects of prior exercise on VO2 kinetics parameters during moderate-intensity exercise. Fourteen untrained subjects (UG: body mass, 81.2 + 10.3 kg; height, 1.78 + 0.07 m; age, 21.2 + 4.0 years) and fourteen well trained cyclists (TG: body mass, 68.2 + 6.9 kg; height, 1.75 + 0.05 m; age, 21.4 + 3.5 years) (more than two years of engagement in endurance training and competition) performed one incremental test to voluntary exhaustion, in order to determine the lactate threshold (LT) and maximal VO2 (VO2max). Thereafter, they performed in different days and in random order, two rest to moderate-intensity exercise transitions (six minutes at 80% of LT), preceded by either no prior exercise or prior supra-maximal exercise (two bouts of one min at 120% of VO2max, with rest of one min between them). During the tests, capillary blood samples were collected to determine lactate concentration and the pulmonary gas exchanges were monitored continuously breath-by-breath. Resting VO2 was significantly (p < 0.05) increased by prior exercise (EPS) in both groups (UG, 0.836 + 0.061 vs. 0.506 + 0.194 L/min; TG, 0.373 + 0.055 vs. 0.577 + 0.137 L/min). Mean response time (time constant of overall VO2 response - 0 - 360 s) was significantly speeded by EPS in untrained group (UG: 32.9 + 7.4 vs. 28.6 + 7.7 s, p < 0.05; TG: 25.7 + 5.0 vs. 23.3 + 5.8 s, p > 0.05). In the trained group, the Assimptota (mean last two minutes VO2 value of moderate exercise) was significantly increased by EPS (TG: 2.208 + 0.383 vs. 2.067 + 0.266 L/min, p < 0.05; UG: 1.600 + 0.269 vs. 1.600 + 0.292 L/min, p > 0.05). It can be concluded... (Complete abstract click electronic access below)
Feussner, Ivo. "Oxidation von Polyenfettsäuren durch Lipoxygenasen". [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=961705108.
Texto completoMüller, Birgit [Verfasser]. "Oxidation von Diorganodichalkogeniden / Birgit Müller". Berlin : Freie Universität Berlin, 2010. http://d-nb.info/1028494351/34.
Texto completoGathen, David. "Reduktion und Oxidation von Ceroxiden". Aachen Shaker, 2007. http://d-nb.info/989943046/04.
Texto completoGathen, David. "Reduktion und Oxidation von Ceroxiden /". Aachen : Shaker, 2008. http://d-nb.info/989943046/04.
Texto completoXi, Yan. "Ozone Decomposition and Acetone Oxidation on Manganese Oxide Catalysts". Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/33112.
Texto completoMaster of Science
Gathen, David [Verfasser]. "Reduktion und Oxidation von Ceroxiden / David Gathen". Aachen : Shaker, 2008. http://d-nb.info/1162793473/34.
Texto completoMärkle, Wolfgang. "Oxidation von Benzaldehydphenylhydrazonen - Untersuchungen mit elektrochemischen Methoden". [S.l. : s.n.], 2005. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11719693.
Texto completoKah, Stefan. "Entwicklung und Einsatz von Mikrostrukturreaktoren mit katalytisch wirksamen Strömungskanälen für die partielle Gasphasen-Oxidation von 1-Buten". [S.l. : s.n.], 2004. http://archiv.tu-chemnitz.de/pub/2004/0098.
Texto completoStreitel, Reinhard. "Oxidation von CoGa Oberflächen untersucht mit oberflächensensitiver Röntgenbeugung". [S.l. : s.n.], 2003. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11051836.
Texto completoHaas, Julian [Verfasser], Michael [Akademischer Betreuer] Müller y Stefan [Akademischer Betreuer] Weber. "Alcohol Dehydrogenase-catalyzed oxidations for regio- and stereoselective synthesis of triketides = Alkoholdehydrogenase-katalysierte Oxidationen für die Regio- und Stereoselektive Synthese von Triketiden". Freiburg : Universität, 2017. http://d-nb.info/114725639X/34.
Texto completoYeomans, Vera. "Einfluss von Antioxidantien auf die Oxidation von Low-density-Lipoproteinen (LDL)". [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964386216.
Texto completoStucki, Alfred. "Elektronenspektroskopische Untersuchungen der Oxidation von festem und flüssigem Aluminium /". [S.l.] : [s.n.], 1985. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=7901.
Texto completoRenaud, Philippe. "Chirale nicht racemische Synthesebausteine durch elektrochemische Oxidation von Carbonsäuren /". [S.l.] : [s.n.], 1986. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=8155.
Texto completoSolbrig, Jochen. "Untersuchungen zur Oxidation von Eisenfilmen mittels Fourier-Transform-Infrarotspektroskopie". [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=961925477.
Texto completoRohwerder, Thore. "Untersuchungen zur enzymatischen Oxidation von Elementarschwefel bei acidophilen Laugungsbakterien". [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=966299418.
Texto completoMirescu, Agnes Viorela. "Selektive Oxidation von niedermolekularen Kohlenhydraten und Diolen mit Edelmetallkatalysatoren". [S.l.] : [s.n.], 2006. http://deposit.d-nb.de/cgi-bin/dokserv?idn=979584086.
Texto completoBirkenseer, Matthias [Verfasser]. "Adsorptive Abtrennung und katalytische Oxidation von Geruchstoffen / Matthias Birkenseer". Aachen : Shaker, 2010. http://d-nb.info/1122546394/34.
Texto completoSpittler, Markus. "Untersuchungen zur troposphärischen Oxidation von Limonen Produktanalysen, Aerosolbildung und Photolyse von Produkten /". [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=96450927X.
Texto completoFrind, Robert. "Synthese und Charakterisierung SiC-basierter Katalysatorsysteme und deren Anwendung in der Oxidation von Methan". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-70484.
Texto completoKah, Stefan. "Entwicklung und Einsatz von Mikrostrukturreaktoren mit katalytisch wirksamen Strömungskanälen für die partielle Gasphasen-Oxidation von 1-Buten". Doctoral thesis, Universitätsbibliothek Chemnitz, 2005. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200400981.
Texto completoZhang, Haixin. "Uniformity of VO2 Phase Change Material (PCM) Thin Films Produced by Thermal Oxidation of Vanadium". University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton162125573238112.
Texto completoBulat, Stephan. "Aerobe Oxidation von primären Alkoholen Modelle für die Galactose-Oxidase /". [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962868523.
Texto completoTamm, Ulf. "Beseitigung von organischen Schadstoffen in Abgasen durch Oxidation mit Ozon". [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=967158524.
Texto completoHünnekes, Edgar Viktor. "Untersuchungen zur katalytischen Oxidation von submikronen Kohlenstoffpartikeln aus motorischen Abgasen". [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=967409659.
Texto completoBartels, Oliver. "Darstellung, Charakterisierung und Eigenschaften von Phthalocyanin-Molekularsiebkompositen in der photokatalysierten Oxidation von Natriumsulfid". [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=975326333.
Texto completoBesselmann, Sonja. "Temperaturprogrammierte und schwingungsspektroskopische Untersuchungen von V2O5/TiO2-Katalysatoren zur selektiven Oxidation von Alkylaromaten". [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=96270122X.
Texto completoMatzerath, Ingo. "Neue Wege zur Synthese von Weinsäure: Untersuchungen zur übergangsmetallkatalysierten Oxidation von 5-Ketogluconsäure". [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973256265.
Texto completoFoss, Sabine. "Mikrobieller Abbau isoprenoider Naturstoffe: anaerobe Oxidation von Monoterpenen durch nitratreduzierende Bakterien /". Göttingen : Cuvillier, 1998. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=008259594&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Texto completoKleinschmidt, Olaf. "Photokatalytische Oxidation von Alkenen und Alkanen mit Sauerstoff an belichtetem Titandioxid". [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962781142.
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