Tesis sobre el tema "TCE"
Siga este enlace para ver otros tipos de publicaciones sobre el tema: TCE.
Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros
Consulte los 50 mejores tesis para su investigación sobre el tema "TCE".
Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.
También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.
Explore tesis sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.
1
Brown, Jillian. "Bacterial community composition, TCE degradation, isotopic fractionation and toxicity of a TCE contaminated aquifer". Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=33520.
Texto completo
2
Wei, Zongsu. "Trichloroethylene (TCE) Adsorption Using Sustainable Organic Mulch". University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1279301053.
Texto completo
3
Barroco, Mário André Lopes. "Articulação em disartria pós-TCE : análise acústica". Master's thesis, Universidade de Aveiro, 2008. http://hdl.handle.net/10773/1983.
Texto completoResumen
Mestrado em Ciências da Fala e da AudiçãoObjectivo/tema: Os Traumatismos Crânio Encefálicos são uma das causas de alterações de fala. Podem provocar vários tipos de lesões, entre as quais se encontram as perturbações motoras da fala. Dentro destas lesões temos a disartria, definida como um distúrbio da expressão verbal causada por alteração do controle muscular dos mecanismos da fala, nomeadamente dos órgãos fono-articulatórios. Na disartria existem alterações na produção do discurso, que podem ser analisadas, acusticamente, por diferentes parâmetros. Método: Foi realizada uma análise acústica de vários parâmetros (taxa de elocução, taxa de articulação, velocidade de leitura, diadococinésia e VOT) em produções de 2 pacientes, de géneros diferentes, com disartria póstraumatismo crânio-encefálico. Resultados: Como principais resultados, verificaram-se, de uma forma geral, uma lentificação na fala de ambos os sujeitos, com uma diminuição dos parâmetros analisados, à excepção das taxas de elocução e articulação para o sujeito masculino. Estes parâmetros para este sujeito encontram-se próximos dos valores normais, devido a este paciente se encontrar em fase final de tratamento. Discussão: Os resultados obtidos neste trabalho vêm ao encontro de muitos estudos (para outras línguas) consultados na revisão bibliográfica realizada, tendo-se verificado uma relação entre a severidade da disartria e as alterações de fala verificadas. Será importante, para estudos futuros, aumentar o número e a variabilidade de pacientes a analisar. ABSTRACT: Objective / theme: Traumatic brain injuries are one of the causes of changes in speech. They can cause various types of problems, among which are the motor disorders of speech. Within these we have dysarthria, defined as a verbal expression disorder caused by change on the control of the mechanisms of speech, particularly the phono-articulation organs. Method: Acoustic analysis of various parameters (speaking rate, articulation rate, speed reading, diadochokinesis and VOT) of productions of one male and one female patients with dysarthria due to traumatic brain injury. Results: The main result was the slower speech for both subjects, reflected on the alterations of several measured parameters, with the exception of speaking and articulation rates to the male subject. These parameters for the male subject, at the final stage of treatment, were close to normal. A relation between the severity of dysarthria and changes of recorded speech was found. Discussion: The results of this study are in agreement to the results reported for other languages. The use of only two subjects prevents generalization of the results, increasing the number and variety of patients should be a priority in future studies.
4
Dias, Susana Patrícia. "Fonação em disartria atáxica pós-TCE : análise acústica". Master's thesis, Universidade de Aveiro, 2008. http://hdl.handle.net/10773/1982.
Texto completoResumen
Mestrado em Ciências da Fala e da AudiçãoObjectivos: Conhecer valores de análises acústicas de voz para os parâmetros F0, jitter, shimmer e HNR de pessoas com disartria atáxica, por TCE, e contribuir para uma caracterização objectiva do tipo de voz destas pessoas. Métodos: Criou-se um corpus e efectuou-se a gravação de voz de duas pessoas de género diferente, ambas com disartria atáxica por TCE. Realizou-se a anotação de vogais, a extracção dos parâmetros acústicos referidos e, posteriormente, a análise acústica. Resultados: Os valores obtidos foram distintos entre informantes. O informante masculino, com severidade ligeira, obteve resultados próximos dos valores considerados para a normalidade. A informante feminina, com severidade moderada, apresentou resultados significativamente desviantes da normalidade, na maioria dos parâmetros. Para ambos, a F0 foi o parâmetro com valores médios mais próximos do dito normal. Jitter e, principalmente, shimmer apresentaram os valores mais desviantes da normalidade. Conclusão: Foram obtidos valores para a análise acústica de voz de pessoas com disartria atáxica, por TCE, para F0, jitter, shimmer e HNR. Os valores foram diferenciados para as duas fases evolução presentes neste estudo: severidade ligeira e moderada. ABSTRACT: Objectives: Find values of acoustics voice analyses for the parameters F0, jitter, shimmer and HNR of people with ataxic dysarthria, for TBI and contribute for an objective characterization of the type of voice of this people. Methods: It was created a corpus and it was effectuated the record of voice of two people of different genre, both with ataxic dysarthria for TBI. It was made the annotation of vowels, the extraction of the cited parameters and, afterward, the acoustic analysis. Results: The obtained values were distinct between the informers. The masculine informer, with mild severity, had average results near to values considered for normality. The feminine informer, with moderate severity, presented results significantly out of normality, in the majority of the parameters. For both, F0 was the parameter nearer to normal. Jitter and, mainly, shimmer, had values more distant from normality. Conclusions: There were achieved values for acoustic analysis of people with ataxic dysarthria, for TBI, for F0, jitter, shimmer and HNR. The values had been differentiated for the two phases of evolution on this study: mild and moderate severity.
5
Wang, Lei. "Tetrachloroethene (PCE) and trichloroethene (TCE) biogradation with bioreactors /". free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3036865.
Texto completo
6
Ma, Wei. "Bioremediation of water contaminated with BTEX, TPH, and TCE". Thesis, University of Macau, 2008. http://umaclib3.umac.mo/record=b1795652.
Texto completo
7
Hawley, Harmonie A. "TCE removal utilizing coupled zeolite sorption and advanced oxidation". Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0428103-150434.
Texto completo
8
Menezes, Filho Carlos. "A influência da Escola de Contas e Gestão do TCE na percepção da mudança da imagem da marca do TCE: a percepção dos servidores". reponame:Repositório Institucional do FGV, 2008. http://hdl.handle.net/10438/17020.
Texto completoResumen
Submitted by Rafaela Moraes (rafaela.moraes@fgv.br) on 2016-09-08T12:49:07Z
No. of bitstreams: 1
Dissertacao_CarlosMenezes.pdf: 2839521 bytes, checksum: fa6e03cda8060d170b8c16f0e84bd9fd (MD5)Approved for entry into archive by Rafaela Moraes (rafaela.moraes@fgv.br) on 2016-09-08T12:52:28Z (GMT) No. of bitstreams: 1 Dissertacao_CarlosMenezes.pdf: 2839521 bytes, checksum: fa6e03cda8060d170b8c16f0e84bd9fd (MD5)
Approved for entry into archive by Rafaela Moraes (rafaela.moraes@fgv.br) on 2016-09-08T13:08:19Z (GMT) No. of bitstreams: 1 Dissertacao_CarlosMenezes.pdf: 2839521 bytes, checksum: fa6e03cda8060d170b8c16f0e84bd9fd (MD5)
Made available in DSpace on 2016-09-08T13:08:58Z (GMT). No. of bitstreams: 1 Dissertacao_CarlosMenezes.pdf: 2839521 bytes, checksum: fa6e03cda8060d170b8c16f0e84bd9fd (MD5) Previous issue date: 2008
O objetivo deste estudo é levantar a influência da criação da Escola de Consta e Gestão do Tribunal de Contas do Estado do Rio de Janeiro na mudança da percepção da imagem da marca coorporativa do Tribunal de Contas do Estado do Rio de Janeiro segundo a percepção dos servidores. O estudo foi feito sob o enfoque da fenomenologia, sendo dado tratamento de categorias filosóficas para a percepção e para a imagem. O conceito de marca foi analisado sob o enfoque do marketing. A pesquisa de campo foi feita por meio de entrevistas semi-estruturadas e desenhos elaborados pelos respondentes. Chegou-se à conclusão que a criação da ECG influenciou a percepção de mudança na imagem do TCE, embora tal influência não tenha sido notada na percepção da missão institucional da organização.
9
Lewis, Amy C. "Assessment and Comparison of Two Phytoremediation Systems Treating Slow-Moving Groundwater Plumes of TCE". Ohio University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1149163196.
Texto completo
10
Narjoux, Adeline. "Biodégradation du trichloroéthylène (TCE) dans un réacteur couplé anaérobie/aérobie". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0019/MQ57421.pdf.
Texto completo
11
Costa, Ingrid Biermann de Azevedo. "A GED no TCE-PB: representações sociais de seus usuários". Universidade Federal da Paraíba, 2014. http://tede.biblioteca.ufpb.br:8080/handle/tede/5914.
Texto completoResumen
Made available in DSpace on 2015-05-14T12:20:08Z (GMT). No. of bitstreams: 1
arquivototal.pdf: 3011942 bytes, checksum: 09fdcff192548380181dd230b82f6dcb (MD5)
Previous issue date: 2014-02-20Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Identify the GED user s social representations in TCE-PB, by tracing the user s profile and reconstructing the deployment process. The approach used was qualitative and quantitative, using the theory of social representations and discourse of the collective subject method. There were used as technical procedures the literature research and fieldwork procedures. Data were collected through the application of mixed questionnaires sent by mail or delivered by hand to the TCE-PB server s that work in the departments of management municipal auditory I and II. This study found that the GED has improved the daily executions tasks and work routines, required less time and effort to fulfill the goals and that users are satisfied with the current conditions. Even brought negative evidences that need to be improved, such as dissatisfaction with the network speed and with the functionality and information foment to SAGRES system, as well as the possibility that current working conditions may affect health.
Apreender as representações sociais dos funcionários do TCE-PB a respeito da GED, traçando-se o perfil dos usuários e reconstruindo-se o processo de implantação. A abordagem utilizada foi qualiquantitativa, com a utilização da teoria das representações sociais e o método do discurso do sujeito coletivo. Utilizaram-se como procedimentos técnicos a pesquisa bibliográfica documental e a pesquisa de campo. Os dados foram coletados através da aplicação de questionários mistos enviados por e-mail ou entregues em mãos aos funcionários do TCE-PB lotados nos Departamentos de Auditoria da Gestão Municipal I e II. O estudo apontou que o GED melhorou as execuções cotidianas das tarefas e rotinas de trabalho, exigiu menos tempo e esforço para o cumprimento das metas e que os usuários encontram-se satisfeitos com as atuais condições de trabalho. Trouxe ainda evidências negativas que precisam ser melhoradas, como insatisfação com a velocidade da rede e com a funcionalidade e fomento de informações do SAGRES, assim como a possibilidade de que as atuais condições de trabalho possam afetar a saúde.
12
Brucha, Gunther. "Avaliação da diversidade microbiana de consórcios anaeróbios enriquecidos a partir de amostras de sedimento lacustre na degradação anaeróbia do tricloroetileno - TCE, empregando-se a técnica de eletroforese em gel com gradiente desnaturante - DGGE". Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-30012017-102026/.
Texto completoResumen
Sedimento do reservatório hipereutrófico de Salto Grande, localizado na cidade de Americana, São Paulo, foi cultivado em condições anaeróbias em meio mineral adicionado de compostos orgânicos (ácidos voláteis e álcoois) com a finalidade de favorecer a metanogênese do sistema. Com a produção de 70% de metano o sedimento foi utilizado para o teste de degradação anaeróbica do TCE. Os testes foram realizados sob atmosfera de N2/CO2 (70:30%) em frascos reatores a 25ºC e agitação constante de 150 rpm. Os frascos reatores foram preparados com meio mineral, acrescido de fontes orgânicas (5 mM de ácidos acético, fórmico e butírico, mas 2,5 mM de ácido lático e 5 mM de etanol e metanol) e inoculado com 5 g de sólidos totais voláteis por litro. Foram preparados frascos com 12 e 6 mg de tricloroetileno por litro. Dois tipos de controles foram preparados, um sem tricoroetileno e outro sem inóculo. Análise da diversidade microbiana utilizando a metodologia do DGGE - Eletroforese em Gel com Gradiente Desnaturante - foram feitas com amostras dos frascos reatores no final do experimento. O DNA da comunidade foi extraído de acordo com o protocolo descrito por TSAI & OLSON (1991) e fragmentos do DNAr 16S foram amplificados com \"primers\" do Domínio Archaea e Bacteria. Os resultados dos testes de degradação do TCE demonstraram a remoção biótica de 68% e 66% nos reatores contendo 6 e 12 mg TCE/L, respectivamente, depois de 56 dias de incubação. No final do experimento morfologias similares aos gêneros Methanosarcina e Methanosaeta estavam presentes. A análise da diversidade microbiana não revelou uma significativa na comunidade após a adição do TCE, demonstrando que a microbiota enriquecida proveniente do reservatório de Salto Grande foi resistente à concentração do TCE estudada podendo ser responsável pelo processo de degradação sob metanogênese.Sediments from the supereutrophic reservoir of Salto Grande, City of Americana, São Paulo State, Brazil, were cultivated under anaerobic conditions in a mineral medium added of organic compounds (volatile fatty acids and alcohols) in order to produce methane. Under 70% of methane production, sediment samples were used for tests of TCE anaerobic degradation. The tests were carried out under N2/CO2 (70:30%) atmosphere in reactor flasks, at 25°C, and constant shaking at 150 rpm. The reactor flasks were prepared with mineral medium, added with organic sources [5 mM of acetic, formic and butyric acids, plus 2.5 mM of lactic acid and 5 mM of ethanol and methanol each], and inoculated with 5 g of STV/L of the sediments. Amounts of 6 and 12 mg/L of TCE concentrations were evaluated. Two types of control reactors were prepared, without TCE and without sediments. Diversity analyses using the DGGE - Denaturing Gradient Gel Eletrophoresis - technique were done with samples from the reactor flasks at the end of the experiment. The community DNA was extracted as described by TSAl & OLSON (1991) and fragments of the 16SDNAr were magnified using the PCR methodology, with Bacteria and Archaea domain primers. The results showed degradation of 40% of TCE at concentrations of 6 mg/L and 12 mg/L after 13 days of incubation time, and complete organic acids removal with 40% of methane in the atmosphere. A second addition of 9 mM of the former organic acids indicated and 4.5 mM of lactic acid resulted in 90% of TCE removal, with 50% of methane, after 56 days of incubation time. Morphologies similar to the genera Methanosarcina, Methanosaeta and Methanospirillum were verified. The microbial diversity analysis did not reveal significant differences among Bacteria and Archaea domains under TCE additions. It was possible to assume that the enriched microbiota from the Salto Grande reservoir was resistant to the concentrations of TCE studied and can be responsible for the degradation processes under methanogenesis.
13
Quintella, Luciano Augusto de Brito Miraldes. "O controle das relações entre o estado e organizações da sociedade civil: as perspectivas do TCU e do TCE-RJ". reponame:Repositório Institucional do FGV, 2008. http://hdl.handle.net/10438/3606.
Texto completoResumen
Made available in DSpace on 2009-11-18T18:56:51Z (GMT). No. of bitstreams: 1
Quintella1.pdf: 542242 bytes, checksum: f560286492e1ed0d3e043bd1e9466b55 (MD5)
Previous issue date: 2008This dissertation is an analysis of how is happening in practice, the control of relations between the public sector and civil society organisations (NGOs) after the establishment of the legal framework of the third sector at the end of the decade of 90. This analysis focuses on the prospects of two organisations of the Brazilian government: Tribunal de Contas da União (TCU) and Tribunal de Contas do Estado do Rio de Janeiro (TCE-RJ). This study addresses the problem from the description of the historical context in relation to recent changes in the role of the state and public management. We proceed a review of the literature on the new models of public management, detailing the relevant aspects. It was also, briefly, as Brazil is facing these changes, the new legal framework of the third sector and the question of control of the relationship between state and civil society organizations. To evaluate the situation on the control of NGOs is held, initially, a survey of information collected in several audits conducted by TCU and TEC-RJ, as well as interviews with representatives of these organisations to achieve the main issues involving the control of transfers of public resources for these entities in the third sector. The analysis of results suggests that the control of the results expected in the new legal framework of the third sector is not consolidated in practice, and even in relation to traditional bureaucratic control there remain significant gaps that put at risk the correct application of public funds earmarked for NGOs.
Esta dissertação faz uma análise sobre como vem ocorrendo, na prática, o controle das relações entre o poder público e as organizações da sociedade civil (ONGs) após o estabelecimento do marco legal do terceiro setor no final da década de 90. Esta análise se concentra nas perspectivas de dois órgãos de controle externo da administração pública brasileira: o Tribunal de Contas da União (TCU) e o Tribunal de Contas do Estado do Rio de Janeiro (TCE-RJ). Este estudo aborda o problema partindo da descrição do contexto histórico recente em relação às mudanças no papel do Estado e na gestão pública. Para embasar a análise procede-se a uma revisão da literatura sobre os novos modelos de gestão pública, conceituando-os e detalhando aspectos relevantes. Aborda-se também, resumidamente, como o Brasil se situa diante destas mudanças, o novo marco legal do terceiro setor e a questão do controle da relação entre o Estado e as organizações da sociedade civil. Com o objetivo de avaliar a situação do controle das ONGs, realiza-se, inicialmente, um levantamento das informações colhidas em diversas auditorias realizadas pelo TCU e TCE-RJ, além de entrevistas com representantes destes órgãos para se obter as principais questões que envolvem o controle das transferências de recursos públicos para estas entidades do terceiro setor. A análise dos resultados leva a crer que o controle de resultados previsto no novo marco legal do terceiro setor não se consolidou na prática, e mesmo em relação ao tradicional controle burocrático ainda persistem falhas significantes que colocam em risco a correta aplicação dos recursos públicos destinados às ONGs.
14
Hicks, Kristin Adair. "Alternative Substrates for Estimating TCE-degrading Capabilities of Toluene-oxidizing Bacteria". NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-07172002-182546/.
Texto completoResumen
One of the primary impediments to the implementation of bioremediation is uncertainty about success in the field. Soils and microbial populations are heterogeneous and it is difficult to extrapolate biodegradation rates from small samples to field scale. While biodegradation rates can be estimated from microcosm studies, in situ methods offer a more meaningful gauge of resident microbial activity. One method used to estimate biodegradation rates in the field is the newly developed Push-Pull technique. While this technique can be conducted on site, it is normally not possible to use target pollutants as the reactive substrates. Consequently, alternative, benign reactive tracers must be used. Ideally, these alternative, reactive tracers interrogate the same enzyme systems that are responsible for the biodegradation of the target pollutant. The objective of this study was to develop a reactive tracer system that could be used to assess toluene-dependent trichloroethylene (TCE) degradation. Our approach has been to determine whether a series of pure strains of toluene-oxidizing bacteria (Burkholderia cepacia G4, Pseudomonas putida F1, Pseudomonas putida mt2, Pseudomonas mendocina KR1), each with different toluene-oxidizing enzymes systems, are capable of cometabolically oxidizing a series of eleven potential alternative substrates. These substrates include simple alkenes, alkanes, and cyclic alkanes. The kinetics (Ks and Vmax) of the biotransformation of these compounds have been determined. While oxidation products were observed for a number of these substrates in connection with one or more of the test organisms, isobutylene was co-oxidized by all test organisms. Oxidation of isobutylene by each organism yielded kinetics constants comparable to the corresponding kinetics of TCE degradation. The enzyme system expressed by Burkholderia cepacia G4 catalyzed the epoxidation of isobutylene while the remaining enzyme systems catalyzed allylic alcohol formation. Isobutylene has potential in field scale Push-Pull studies as a tool for evaluating rates of aerobic toluene-dependent TCE degradation and of differentiating the relative contributions of the TCE-degrading population. A pilot study of this alternative substrate at Edwards Air Force Base will test whether it can be used successfully to estimate in situ degradation of TCE. Analysis of isobutylene oxidation products in toluene-enriched ground water may offer an inexpensive and effective method of measuring the degradation of TCE at contaminated sites nationwide.
15
He, Ruo. "MEMBRANE IMMOBILIZED REACTIVE Fe/Pd NANOPARTICLES: MODELING AND TCE DEGRADATION RESULTS". UKnowledge, 2012. http://uknowledge.uky.edu/cme_etds/14.
Texto completoResumen
Detoxification of chlorinated organic compound is an important and urgent issue in water remediation nowadays. Trichloroethylene (TCE), as a model compound in this study, has been proved to be degraded effectively by bimetallic nanoparticles (NPs) in solution phase. In this study, Fe/Pd bimetallic NPs were synthesized in poly (acrylic acid) (PAA) functionalized polyvinylidene fluoride (PVDF) microfiltration membranes. TCE dechlorination with these bimetallic NPs was conducted under different pH values and different metal loadings to study the role of corrosion on reaction rates.
One-dimensional mathematical model with pseudo first-order reaction kinetic was introduced to discuss the TCE dechlorination profile in membrane system. Reduction reaction in pores is affected by several parameters including NP loading and size, TCE diffusivity, void volume fraction and surface-area-based reaction rates. This model result indicated that modification is needed to correct the reaction rate obtained from bulk solution in order to represent the actual efficiency of NPs on reduction reaction. In addition, TCE dechlorination mainly occurred near NPs’ surface. Second part of model indicated that reduction mechanism with TCE adsorption-desorption behavior could be used to discuss dechlorination with a high TCE concentration.
16
Gonzalez, Salinas Juan Carlos. "Informe para la sustentacion de expedientes: 00162-2016-TCE / 01211-2009". Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/655901.
Texto completoResumen
El presente expediente es un caso por falsificación de cartas fianzas del Consorcio San Buenaventura hacia el gobierno Regional de Huánuco. Contando con una parte penal y una netamente administrativa que, para efectos de la titulación se hizo énfasis en lo actuado en el fuero administrativo en el Tribunal de Contrataciones con el Estado, demostrando que se puede individualizar la responsabilidad de los consorciados. Durante el 2015, el Ministerio público teniendo los actuados en el fuero penal, notifica de oficio al Organismo Supervisor de contrataciones, quien pide a la entidad emitir un informe técnico legal sobre la procedencia y presunta responsabilidad del consorcio. Al entregarse este documento, emiten sus descargos Erwin Vidarte Llontop y Coshima S.C.R.L, excepto B y V Servicios Generales. Presentada esta documentación, la segunda sala del Tribunal decide SANCIONAR a Erwin Vidarte Llontop con 40 meses de inhabilitación temporal en sus derechos de participar en procesos de selección y contratar con el Estado, a la empresa Cosihma por 36 meses de inhabilitación; y finalmente a la empresa B y V Servicios Generales S.A.C por 37 meses de inhabilitación temporal. Sin embargo, Cosihma, solicita una reconsideración porque B y V Servicios Generales, tiene una inhabilitación temporal que rige desde el 11 de noviembre del 2015 por un plazo de 39 meses. A la par, Erwin Vidarte Llontop, presentó un recurso de nulidad. Finalmente, el Tribunal de Contrataciones del Estado, declara fundado el recurso de reconsideración interpuesto por la empresa Cosihma S.C.R.L. y revoca la sanción por inhabilitación temporalThis case is a case of forgery of letters of guarantee of the San Buenaventura Consortium to the Regional Government of Huanuco. It has a criminal part and a purely administrative part which, for the purposes of the title, emphasis was placed on the actions taken in the administrative jurisdiction in the State Contracting Court, demonstrating that the responsibility of the consortium members can be individualized. During 2015, the Public Prosecutor's Office, having the proceedings in the criminal jurisdiction, notifies ex officio the Supervisory Body of Procurement, which requests the entity to issue a technical legal report on the origin and alleged liability of the consortium. Upon delivery of this document, Erwin Vidarte Llontop and Coshima S.C.R.L., except for B y V Servicios Generales, issued their statements. Once this documentation was presented, the Second Chamber of the Court decided to SANCTION Erwin Vidarte Llontop with 40 months of temporary disqualification from participating in selection processes and contracting with the State; Cosihma with 36 months of disqualification; and finally B y V Servicios Generales S.A.C. with 37 months of temporary disqualification. However, Cosihma, requests a reconsideration because B y V Servicios Generales, has a temporary disqualification in force since November 11, 2015 for a term of 39 months. At the same time, Erwin Vidarte Llontop, filed an appeal for annulment. Finally, the State Contracting Tribunal declared the appeal for reconsideration filed by Cosihma S.C.R.L. to be well-founded and revoked the sanction for temporary disqualification.
Trabajo de suficiencia profesional
17
Dubout, Edouard. "L'article 13 TCE : la clause communautaire de lutte contre les discriminations". Rouen, 2004. http://www.theses.fr/2004ROUED002.
Texto completoResumen
L'objet de la thèse est de montrer que l'adoption de l'article 13 TCE, lors du traité d'Amsterdam, puis du droit qui en découle ( directive n 2000/43 et n 2000/78 ) ont donné naissance à une véritable politique commune de l'égalité. L'étude consiste à en analyser le fondement et les conséquences. L'émergence de cette politique est rendue possible grâce à la nature juridique de l'article 13 TCE qui n'est pas un principe d'interdiction des discriminations mais une clause d'habilitation au profit de la communauté en vue de combattre certaines d'entre elles ( fondées sur le sexe, la race ou l'origine ethnique, la religion ou les convictions, un handicap, l'âge, ou l'orientation sexuelle ). La spécificité de l'article 13 TCE s'accompagne d'ambigui͏̈tés rédactionnelles, révélatrices des enjeux que soulève la disposition. Ceux-ci sont de deux ordres. D'un point de vue institutionnel, l'article 13 TCE appelle une considération tant de la finalité et de la nature de l'intégration communautaire, que de l'architecture européenne de protection des droits fondamentaux. Sous l'angle matériel, l'action qui découle de la clause entend à la fois préciser et augmenter le respect de l'égalité. Le droit communautaire propose à cet égard des solutions parfois intéressantes comme l'interdiction de la discrimination indirecte, l'autorisation des actions positives de résultats, le rééquilibrage de la charge de la preuve ou encore l'instauration d'une agence nationale de régulation. Au final, l'article 13 TCE est révélateur d'un mouvement dialectique, au niveau européen, d'enrichissement mutuel entre l'approfondissement de l'intégration communautaire d'une part et l'amélioration de la protection égalitaire d'autre part.
18
Sharma, Sachin. "Slurry test evaluation for in-situ remediation of TCE contaminated aquifer". Worcester, Mass. : Worcester Polytechnic Institute, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-082306-124940/.
Texto completo
19
Lemos, Carlos Eduardo Enriques Feio de. "Controle social exercido através da denúncia no âmbito do TCE-RJ". reponame:Repositório Institucional do FGV, 2008. http://hdl.handle.net/10438/3609.
Texto completoResumen
Made available in DSpace on 2009-11-18T18:56:51Z (GMT). No. of bitstreams: 1
Clemos.pdf: 994584 bytes, checksum: 3f88eac331b350df7eb3c09b2655df24 (MD5)
Previous issue date: 2008The crisis that affected the capitalist states during the last decade of the 20th century, put an end to the period of greatest expansion of the state, demanding alterations that brought, especially in economic terms, the ideals of the liberal state. The main goal of these changes was to optimize the administration of the public service by introducing into it more efficiency, transparency, and morality because the state had shown to be incapable of attending the demands of the society and its way of doing was inefficient and did not reach out to the public interest. In Brazil, like in other part of the world, recent scandals of corruption and misuse of public funds put in doubt the efficiency of the financial control system. Like any other political system Brazil has a complex set of external and internal control, institutions that work to prevent misuse of public funds and identify responsibilities if bad use occurred. All these elements highlight the mechanisms of control of the public administration, which came to be seen as essential instruments for the improvement of the management of the public resources, targeting the collective interest. Therefore, along with the traditional mechanisms of power suppression, such as the system of checks and balances, social control arises. This, when used together with the monitoring exercised by public inspection agencies, is defined as horizontal accountability activated by civil society, in which citizens and institutions gather efforts in order to promote a more effective charge of responsibility from public agents and politicians in case of misconducts. This study aimed to identify the opportunities and limitations of social control exercised by the complaint under the TCE-RJ. The results point to the need to develop measures to guarantee the anonymity of denouncers, to simplify the forms of access the TCE-RJ and to improve information spread to the citizen.
A crise que assolou os Estados capitalistas na última década do século XX pôs fim ao período de maior expansão do Estado, gerando a necessidade de reformas que trouxessem, principalmente do ponto de vista econômico, o ideário do Estado Liberal. Tais reformas tinham como objetivo principal a otimização da administração da coisa pública, aproximando a gestão estatal da gestão privada, carreada pelos princípios da eficiência, transparência e moralidade, vez que o Estado como administrador demonstrou ser incapaz de atender às demandas, tendo em vista a ineficiência dos meios utilizados para alcançar o interesse público. No Brasil, como em outras partes do mundo, os recentes escândalos de corrupção e abuso dos fundos públicos põem em dúvida a eficácia do sistema de controle financeiro. Como qualquer outro, o sistema político brasileiro tem um complexo conjunto de controle interno e externo, instituições que atuam para evitar a má utilização dos dinheiros públicos e identificar responsabilidades se tiver ocorrido mau uso. Essa comunhão de fatores colocou em evidência os mecanismos de controle da administração pública, que passaram a ser vistos como instrumentos essenciais para uma melhor utilização dos recursos públicos objetivando o interesse coletivo. Assim, ao lado dos mecanismos tradicionais de limitação do poder, como a representação e o sistema de freios e contrapesos, surge o controle social. Este, quando agregado ao monitoramento exercido por agências estatais de fiscalização, é classificado como accountability horizontal socialmente provocada, modalidade na qual cidadãos e instituições unem esforços para uma responsabilização mais efetiva de agentes públicos/políticos por eventuais condutas irregulares. O presente estudo objetivou identificar quais as possibilidades e as limitações do controle social exercido através da denúncia no âmbito do TCE-RJ. Os resultados apontam para a necessidade de se desenvolver medidas que garantam o anonimato dos denunciantes, que simplifiquem as formas de acesso ao TCE-RJ e que melhorem a divulgação de informações ao cidadão.
20
Tibui, Aloysius. "Biodegradation of Aliphatic Chlorinated Hydrocarbon (PCE, TCE and DCE) in Contaminated Soil". Thesis, Linköping University, The Tema Institute, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7908.
Texto completoResumen
Soil bottles and soil slurry experiments were conducted to investigate the effect of some additives on the aerobic and anaerobic biodegradation of chlorinated aliphatic hydrocarbons; tetrachloroethylene (PCE), trichloroethylene (TCE) and dichloroethylene (DCE) in a contaminated soil from Startvätten AB Linköping Sweden. For the aerobic degradation study the soil sample was divided into two groups, one was fertilised. The two groups of soil in the experimental bottles were treated to varying amount of methane in pairs. DCE and TCE were added to all samples while PCE was found in the contaminated soil. Both aerobic and anaerobic experiments were conducted. For aerobic study air was added to all bottles to serve as electron acceptor (oxygen). It was observed that all the samples showed a very small amount of methane consumption while the fertilised soil samples showed more oxygen consumption. For the chlorinated compounds the expected degradation could not be ascertained since the control and experimental set up were more or less the same.
For the anaerobic biodegradation study soil slurry was made with different media i.e. basic mineral medium (BM), BM and an organic compound (lactate), water and sulphide, phosphate buffer and sulphide and phosphate buffer, sulphide and ammonia. To assure anaerobic conditions, the headspace in the experimental bottles was changed to N2/CO2. As for the aerobic study all the samples were added DCE and TCE while PCE was found in the contaminated soil. The sample without the soil i.e. the control was also given PCE. It was observed that there was no clear decrease in the GC peak area of the pollutants in the different media. The decrease in GC peak area of the pollutants could not be seen, this may be so because more susceptible microorganisms are required, stringent addition of nutrients and to lower the risk of the high concentration of PCE and petroleum products in the soil from Startvätten AB.
21
Plett, James. "Metolachlor and TCE Plume Characteristics in a Dolostone Aquifer Using a Transect". Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/2966.
Texto completoResumen
Much is known about natural attenuation of contaminants in granular aquifers because many contaminant plumes in these aquifers have been intensively monitored with detailed sampling along cross sections positioned across the plumes (i. e. transects). However, little is known about natural attenuation of contaminant plumes in fractured rock. In this thesis study, strong natural attenuation of a persistent co-mingled plume of trichloroethylene (TCE) and an herbicide (metolachlor) in a 100 m thick dolostone aquifer used for municipal water supply in Cambridge, Ontario is shown based on detailed delineation of groundwater contaminant concentrations along a single transect located 150 m downgradient from the area where the metolachlor entered the dolostone and 300 m downgradient from the TCE source area. This delineation was accomplished using depth-discrete, multilevel groundwater monitoring systems in five cored holes and detailed analyses of contaminant concentration in rock cores. The maximum metolachlor concentration on the transect is a factor of 20 below the maximum concentration in the metolachlor source area and the maximum TCE concentration on the transect is lower by a factor of 100 from the TCE source area. Matrix diffusion and strong temporal variability of the groundwater flow system caused by pumping of nearby municipal wells have likely caused strong natural attenuation of metolachlor and TCE and degradation has likely contributed to even stronger TCE attenuation. The transect shows rock core concentrations much higher than the groundwater concentrations in the multilevel systems at the same locations and in the conventional monitoring wells, which indicates that plume persistence is likely maintained by back diffusion from the rock matrix, which has very low hydraulic conductivity but substantial porosity, into the active groundwater flow in the fractures.
Metolachlor has been observed at very low concentrations and has persisted at these concentrations in the nearest municipal pumping well located approximately 780 m downgradient of the transect, however this well shows no detectable TCE. The relatively low concentrations along the transect and the replenishment of the plume by back diffusion suggests that a substantial increase of metolachlor or TCE in the municipal well is unlikely.
22
Binnås, Caroline y Fredrik Lindgren. "Utvärdering av ett modelleringsverktygs förmåga att prediktera koncentrationen av TCE i inomhusluft". Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-37119.
Texto completoResumen
Polluted areas are places where the level of contamination can be harmful for human health and the environment. There are about 80 000 possibly polluted areas in Sweden, 25 000 of which have been classified according to the risk of specific site. To evaluate the risk and distribution of a contamination on polluted areas, the most common way is to do a risk assessment. In addition to environmental engineering studies and surveys of the site, modelling tools can be used as a complement to try and predict the risk of polluted areas. The purpose of this study is to evaluate such a modelling tool called JAGG 2.1 (Jord, Afdampning, Gas and Grundvand) and its applicability to predict concentrations of the chlorinated solvent trichloroethylene (TCE) in indoor air of buildings located on contaminated sites. The questions that are to be answered in this study is whether the modelling tool can be used to predict concentration of TCE in indoor air and what parameters that affect the calculated value the most? The work with risk assessment could be facilitated by validating this modelling tool. The modelling tool was tested on three different contaminated sites in Sweden. When testing the modelling tool, relevant data was used to calculate the concentration of TCE in indoor air and thereafter the results were analyzed. This study showed that the modelling tool underestimated the concentrations of TCE for three out of four tested rooms in the buildings on the contaminated areas for all the tested parameters taken into account. The one room where JAGG 2.1 predicted correct TCE concentrations, compared to the measured result, is considered to have all the right parameters. The parameters are ceiling height, ventilation, the slab-on-grade thickness and the depth where the sample was taken and other geological conditions suitable for a successful calculation. This led to the conclusion that this modelling tool only can be used as an assisting tool and cannot replace environmental engineering studies. The obtained results must also be critically reviewed, before using it for risk assessments. Keywords: JAGG 2.1, modelling tools, vapor intrusion, chlorinated solvents, trichloroethylene.
23
Mattson, Kelli M. "Investigating the Biostimulating Effects of ESO Addition to a TCE Contaminated Site". Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/40871.
Texto completoResumen
Remediation of chlorinated ethene contaminated sites presents a problem for the environmental industry. Many innovative technologies exist to remove these chemicals from the subsurface; however, most of these technologies require extensive time and incur significant cost. A technology called bioremediation utilizes microorganisms to break down contaminants such as perchloroethene (PCE), trichloroethene (TCE), dichloroethene (DCE), and vinyl chloride (VC) to non-toxic compounds in a process called reductive dechlorination.
Microorganisms that are capable of dechlorination usually require reducing conditions as well as bioavailable hydrogen and carbon sources. Emulsified vegetable oil has emerged as a cost-effective source of degradable organic matter to facilitate reductive dechlorination in the subsurface. Through Æ Ã -oxidation, microorganisms can break down the long chain fatty acids in vegetable oil into smaller fatty acids such as acetate, propionate, and butyrate. The fermentation of the oil provides reduced conditions as well as a slow release of hydrogen and carbon into the subsurface.
This study consisted of an evaluation the effectiveness of emulsified vegetable oil in stimulating reductive dechlorination using sixteen laboratory microcosms constructed from soil and groundwater from an aquifer contaminated with TCE located at the Naval Weapons Station in Charleston, South Carolina. Each microcosm was monitored for chloroethenes, volatile fatty acids, long chain fatty acids, and total carbon on a weekly basis. Results show successful fermentation of fatty acids and reduced conditions favorable for dechlorination.Master of Science
24
Braga, Bernardo Drummond. "Devemos monitorar a pressão intracraniana de pacientes com TCE grave marshall II?" Universidade Federal de Minas Gerais, 2013. http://hdl.handle.net/1843/BUBD-9GHHJA.
Texto completoResumen
Introduction: Intracranial pressure (ICP) monitoring is considered the standard of care for severe traumatic brain injury (TBI). A recent clinical trial concluded that care focused on maintaining monitored intracranial pressure at 20 mm Hg or less was not shown to be superior to care based on imaging and clinical examination. Purpose: Evaluate the relationship of intracranial hypertension with an increase of brain lesions, mortality and morbidity in patients with severe TBI Marshall II. Determine whether these patients need to have ICP monitored. Methods: Prospective observational cohort study on severe TBI patients (GCS8), Marshall CT classification II. Results: Seventy patients were divided into 2 groups based on ICP in the first 48h; G1: ICP 20mmHg (49 patients) and G2 ICP > 20mmHg (21 patients), 90% male, mean age 30.8 years, 78,5% sustained motor vehicle crash or pedestrian injuries, mean GCS 6. The most common CT findings were: subarachnoid hemorrhages and contusions (22 and 18 respectively). Seven patients died in G2 (33%) compared to 2 deaths in G1 (4%) (p<0.05). The OR of death was 11,7 times greater in G2 (95%CI: 2.2- 63,1). The median Glasgow outcome scale (GOS) score at 90 days was 2 in G2 and 5 in G1. New CT findings or progression were detected in 15 (71%) of G2 patients and in 5 (10%) G1 patients (p<0.05). The OR of new CT finding or progression was 22 times greater in G2 than G1 (95%CI: 5,02- 106,9). Two patients in G2 required surgery, none in G1. Conclusions: Severe TBI patients with Marshall score II and intracranial hypertension, are at greater risk for new CT abnormalities, worse prognosis, and higher mortality than those with no hypertension. ICP monitoring was crucial to define prognosis. Severe TBI Marshall II patients should be monitored.Introdução: A monitoração da pressão intracraniana (PIC) é considerada o tratamento padrão para pacientes com traumatismo cranioencefálico grave (TCE). Um ensaio clinico recente demonstrou que pacientes tratados conforme protocolos em que o foco é manter a PIC menor que 20mmhg, não foi superior a protocolos de tratamento baseado em imagens e exame físico. Objetivos: Avaliar a relação da hipertensão intracraniana com crescimento de lesões, mortalidade e morbidade em pacientes com TCE grave Marshall II. Determinar se esses pacientes precisam monitorar a PIC. Método: Estudo de coorte observacional prospectivo em pacientes com TCE grave classificados como Marshall II. Resultados: setenta pacientes foram divididos em dois grupos baseado na PIC: G1- PIC 20mmHg (49 pacientes) e G2- PIC > 20mmHg (21 pacientes). Sendo: 90% masculino, idade média de 30.8 anos, 78,5% tendo como mecanismo de trauma o acidente automobilistico ou atropelamento. A escala de coma de glasgow (ECG) média foi igual a 6. Os achados mais comuns na tomografia foram hemorragias subaracnóideas e as contusões (22 e 18 respectivamente). Sete pacientes morreram no G2 (33%) comparado a duas mortes no G1 (4%) (p<0,05). O OR de mortalidade foi 11,7 vezes maior no G2 (IC 95%: 2,2 a 63,1). A mediana da Escala de Desfecho de Glasgow após 90 dias foi de 2 para o G2 e de 5 para o G1. Novos achados ou progressões de lesões ocorreram em 15 (71%) dos pacientes do G2 e em 5 (10%) dos pacientes do G1 (p<0,05). O OR de um novo achado na TC foi vinte e duas vezes maior no G2 em comparação ao G1 (IC 95%: 5,02 a 106,9). Dois pacientes do G2 precisaram de cirurgia e nenhum do G1. Conclusões: Pacientes com TCE grave Marshall II, com hipertensão intracraniana, tem maior risco para crescimento de lesões na TC de controle, pior prognóstico e maior mortalidade que aqueles sem hipertensão. A monitoração destes pacientes foi definitiva para determinar o prognóstico. Pacientes com TCE grave Marshall II deverão ser monitorados.
25
Chaves, Carlos Bráulio da Silveira. "A razoável duração do processo frente à implantação do processo eletrônico perante o Tribunal de Contas do Estado da Paraíba". Universidade Federal da Paraíba, 2013. http://tede.biblioteca.ufpb.br:8080/handle/tede/5887.
Texto completoResumen
Made available in DSpace on 2015-05-14T12:20:03Z (GMT). No. of bitstreams: 1
ArquivoTotalCarlos.pdf: 18836457 bytes, checksum: 7f91c4802d5cf87f50a5c63ef01320f4 (MD5)
Previous issue date: 2013-06-28Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Na sociedade da informação, os órgãos julgadores, dentre os quais se inclui o Tribunal de Contas do Estado da Paraíba, são incansavelmente cobrados por métodos cada vez mais eficiente, célere e eficaz no desempenho de suas atribuições evitando transtornos e consequências prejudiciais aos que a eles recorrem para resolução de suas lides. Nessa perspectiva, a egrégio Corte de Contas Paraibana dentro de uma nova ordem processual, procedeu à mudança nos processos sobre a sua jurisdição de procedimentos do suporte em meio físico para o eletrônico, regulamentado pela Lei Complementar estadual n.º 91, de 29 de outubro de 2009. Nessa pesquisa, o caso analisado é um estudo objetivando apreciar se o procedimento eletrônico implantado pelo TCE/PB, contribui, com a diminuição do prazo para julgamento dos processos de prestação de contas, garantindo assim o cumprimento do Princípio da Celeridade Processual e Duração Razoável do Processo. Para concretização da pesquisa se realizou uma pesquisa do tipo exploratória, seguindo uma abordagem quantitativa baseado nos elementos da estatística descritiva, utilizando-se de um estudo de caso tendo como universo o próprio TCE/PB, de onde foram extraídos os dados da pesquisa através do sistema eletrônico de tramitação-TRAMITA. Quanto aos Sujeitos apreciou-se a média de dias para julgamento das prestações de contas anuais das camaras municipais, Prefeituras, órgão integrantes da administração pública Indireta, assembleia legislativa, governo do Estado e Tribunal de Justiça, durante os exercícios de 2008 a 2011. Com isso, foi possível demonstrar, que a implementação do procedimento eletrônico pelo Tribunal de Contas do Estado da Paraíba,tem logrado êxito no cumprimento do Princípio da Celeridade Processual e Duração Razoável do Processo .
26
Musielak, Marion. "Etude numérique et expérimentale des transferts de composés organiques volatils du sol à l’air ambiant, en passant au travers du béton". Thesis, Toulouse, INPT, 2012. http://www.theses.fr/2012INPT0088/document.
Texto completoResumen
Cette thèse fait partie du projet FLUXOBAT (ANR-PRECODD 2008), qui a pour objectif global de développer une méthodologie robuste et fiable d4estimation des transferts de Composés Organiques Volatils (COV) du milieu souterrain vers l4air intérieur et extérieur. Ce travail concerne l4étude à l4échelle du laboratoire des transferts d4un COV type, le trichloréthylène (TCE), au travers d4un sol modèle (sable) et surtout du béton, en conditions isothermes et pour des milieux secs. Les moyens utilisés sont la modélisation numérique et une série d4expériences en laboratoire. Une étude préliminaire reproduisant des expériences existant dans la littérature dans le sable uniquement, a tout d4abord permis de mettre en place les outils expérimentaux et numériques nécessaires à la modélisation du problème, avant la réalisation de l4étude sur le matériau béton, bien plus complexe. L4étude des transferts dans le béton a été divisée en plusieurs étapes. Dans un premier temps, les transferts dans la pâte de ciment, plus homogène, ont été caractérisés. En particulier, la valeur du coefficient de sorption du TCE dans ce matériau a été obtenue à l4aide du suivi expérimental de la réponse à un « pulse » de polluant. Puis, les paramètres caractéristiques (porosité, perméabilité, ouverture des fissures, coefficient de diffusion effectif) des échantillons tests de « béton complet » ont été mesurés. Un protocole de caractérisation complète des galettes de béton a été mis au point, associé à la création d4un dispositif permettant la mise en place d4expériences de transferts du TCE (composé dont l4étude est complexifiée par son caractère particulièrement agressif) et applicables à tout milieu poreux consolidé. La problématique de l4hétérogénéité du béton, due à la présence de granulats et de fissures, a été traitée afin de proposer des équations de transfert moyennées donnant une meilleure description des transferts. Les conditions d4un cas de pollution « réel » ont été reproduites à l4échelle du laboratoire, sur un modèle réduit, dans une colonne de sable surmontée d4une galette de béton et d4une cavité en dépression représentant un bâtiment, pour étudier les transferts de TCE et valider la caractérisation développée dans l4étude. Les expériences de transferts réalisées sont reproductibles, ont été interprétées numériquement (sous Comsol multiphysics®), et ont permis de confirmer la pertinence de la simulation des transferts à l4aide de la caractérisation développée dans cette étude. Ce travail a permis de mettre, en particulier, en évidence l4importance de la caractérisation fine du béton, dont les propriétés et l4hétérogénéité sont des facteurs très influents sur les transferts, qui ne peuvent pas être décrits correctement avec des modèles analytiques simplifiés. Les résultats comportent l4estimation des paramètres caractérisant les transferts de COV dans le béton, et une compréhension fine des transferts du TCE dans ce matériauThis thesis is part of the project FLUXOBAT (ANR-PRECODD 2008), which has the overall objective to develop, a robust and reliable methodology for estimating the transfer of Volatile Organic Compounds (VOC) from the soil to the indoor and outdoor air. This work concerns the study, at laboratory scale, of a typical VOC, the Trichlorethylene (TCE), transfer through a model soil (sand) and through the concrete material, under isothermal and dry conditions. Methods used include numerical modeling and a series of laboratory experiments. A preliminary study replicating experiences existing in the literature, with sand only, was first implemented to develop the tools necessary for experimental and numerical modeling of the problem, before the completion of the study with the concrete material, although more complex. The study of transfers in concrete has been divided into several stages. Initially, the transfers in the cement paste, more homogeneous, have been characterized. In particular, the value of the sorption coefficient of TCE in this material was obtained using the experimental response to a "pulse" of pollutant. Then the characteristic parameters (porosity, permeability, crack opening, effective diffusion coefficient) of "complete concrete" test samples were measured. A protocol for complete characterization of concrete slabs has been developed, associated with the creation of a device for the implementation of TCE transfer experiences (compound whose study is complicated by its very aggressive character) and applicable to any consolidated porous medium. The problem of heterogeneity of concrete, due to the presence of aggregates and cracks, has been treated to propose averaged transfer equations, giving a better description of the transfers. The conditions of a "real" pollution incident were reproduced in laboratory, modeled by a sand column topped by a concrete slab and a vacuum cavity representative of a building, in order to study the transfer of TCE and validate the characterization developed in the study. The transfer experiments are reproducible, were numerically interpreted (with COMSOL Multiphysics®), and have confirmed the relevance of the transfer simulation using the characterization developed in this study. This work has enabled, in particular, to highlight the importance of detailed characterization of the concrete, which properties and heterogeneity are exceedingly influential on transfers, and which cannot be described correctly with simplified analytical models. The results include the estimation of parameters characterizing the transfer of VOCs into the concrete, and a keen understanding of transfer of TCE in this material
27
Russo, Ann. "Immiscible Liquid Dissolution in Heterogeneous Porous Media". Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/194522.
Texto completoResumen
Immiscible liquids, including chlorinated solvents, have proven to be a lasting source of subsurface contamination at many hazardous waste sites. Continued improvement of site characterization and determination of applicable remediation technologies can be achieved by further understanding of the transport and fate of these contaminants. The transport and fate of trichloroethene (TCE) was investigated through miscible displacement and dissolution experiments. Miscible displacement experiments were conducted using homogeneously packed columns with several porous media encompassing a range of particle size distributions. Immiscible liquid dissolution was investigated using homogeneously packed columns containing a residual saturation of trichloroethene. The same porous media were used for immiscible liquid dissolution experiments. Mathematical modeling of miscible displacement and dissolution experiments was conducted using a one-dimensional single region or multi-region model. Imaging of immiscible liquid dissolution was also conducted, using Synchrotron X-ray Microtomography imaging at Argonne National Laboratory, Argonne, IL. Dissolution experiments exhibited nonideal dissolution behavior that was apparent in observed effluent data and in collected imaging data. Nonideal behavior was manifested as secondary regions of relatively constant aqueous concentrations occurring for a number of pore volumes. This behavior was observed to increase in magnitude as particle size distribution of the porous media increased. During imaging, immiscible liquid blobs were observed to dissolve throughout the column during dissolution. This behavior is also indicative of nonideal dissolution, as it would be expected that dissolution would first occur for the blobs nearest the inlet and then proceed upward through the column as dissolution progressed. In many cases, a multi-region modeling approach was necessary to successfully represent the nonideal behavior observed. Comparisons were made between the natural porous media used for this research and a well-sorted sand. Nonideal dissolution was not observed in the well-sorted sand.
28
Lei, Cheng Keng. "Bioremediation of water contaminated with BTEX, TPH, and TCE under different environmental conditions". Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2182912.
Texto completo
29
Brambilla, Tânia de Paula. "Desenvolvimento de métodos para marcação de DMSA pentavalente com 99m Tce 188 Re". Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-29062009-160804/.
Texto completoResumen
Tecnécio-99m é o radionuclídeo mais utilizado em procedimentos para imagem diagnóstica na Medicina Nuclear, mais de 80 % dos radiofármacos são compostos marcados com 99mTc. 99mTc-DMSA(V) tem sido usado no diagnóstico de tumores de tecidos moles, cabeça e pescoço. Este radiofármaco tem uma alta especificidade para detecção de carcinoma medular de tireóide e metástase óssea em vários tipos de cânceres. Estudos de biodistribuição do 188Re-DMSA(V) tem mostrado que suas propriedades farmacocinéticas são similares ao do 99mTc-DMSA(V), então este agente poderia ser usado para terapia desses tumores. O objetivo desse trabalho é o desenvolvimento de métodos para marcação do DMSA(V) com 99mTc e 188Re. O 99mTc-DMSA(V) pode ser preparado por dois métodos. Um dos métodos é o método indireto, que é através do kit comercial de DMSA(III), ajustando-se o pH de 2,5 para ~8,5 com NaHCO3, que foi estudado e otimizado, apresentando bons rendimentos de marcação. O outro é o método direto, pelo preparo de um kit liofilizado de DMSA(V) pronto para marcação com 99mTc, sendo o método de interesse do trabalho pela maior praticidade no uso clínico. A formulação mais adequada do método direto foi: 1,71 mg de DMSA, 0,53 mg de SnCl2.2H2O e 0,83 mg de ácido ascórbico (pH 9). Marcando-se esse kit com 1 a 2 mL de 99mTc, com atividades de até 4736 MBq (128 mCi), e tempo instantâneo de reação, consegue-se rendimento de marcação maior que 95%. O kit liofilizado foi estável por até 6 meses e estudos de biodistribuição confirmaram a qualidade do DMSA (V) marcado com 99mTc usando este kit. O potencial de redução do Re é mais baixo do que do Tc, com isso as condições de preparação do 188Re-DMSA(V) são diferentes das usadas para o 99mTc-DMSA(V). O 188Re-DMSA(V) é preparado em meio ácido, com isso é possível utilizar o kit comercial de DMSA(III) para marcação com 99mTc, que apresenta pH 2,5, na preparação do 188Re- DMSA(V). Com este método conseguiu-se rendimentos de marcação superiores a 95%, com tempo de reação de 30 minutos à 100 ºC, utilizando no máximo 1 mL de 188ReO4 -. Outro método de preparação do 188Re-DMSA(V) também foi estudado, através de um kit líquido contendo 2,5 mg de DMSA, 1,00 mg de SnCl2.2H2O, 30 mg de oxalato de sódio e pH 5. Este kit marcado com 1 mL de 188ReO4 -, com 15 minutos de reação à temperatura ambiente apresentou rendimento de marcação de aproximadamente 91%.Technetium-99m is the most useful radionuclide in diagnostic imaging procedures in Nuclear Medicine, more than 80 percent of radiopharmaceuticals are 99mTc-labeled compounds. 99mTc-DMSA(V) has been used for imaging of soft tissue, head and neck tumors. It shows a particularly high specificity for medullary thyroid carcinoma and bone metastases in a variety of cancers. Biodistribution studies of 188Re-DMSA(V) have shown that its general pharmacokinetic properties are similar to that of 99mTc-DMSA(V), so this agent could be used for targeted radiotherapy of these tumors. The aim of this work is the development of methods of labeling DMSA(V) with 99mTc and 188Re. 99mTc-DMSA(V) can be prepared by two methods. One of them is the indirect one, through the use of a commercial kit of DMSA (III), by adjusting the pH from 2.5 to ~8.5 with NaHCO3. This method was evaluated and optmized presenting high labeling yields. The other method is the direct one, through the preparation of a liophylised kit ready for labeling with 99mTc, being the method of interest of this work, due to the easy of its clinical use. The most adequate formulation of the kit was: 1.71mg of DMSA, 0.53mg of SnCl2.2H2O and 0.83 mg of ascorbic acid (pH 9). Labeling yields higher than 95% were achieved labeling this kit with 1 to 2 mL of 99mTc with activities up to 4736 MBq (128 mCi). The kit was stable up to 6 months and biodistribution studies confirmed the quality of the DMSA (V) labeled with 99mTc using this kit. The reduction potential of Re is lower than the one for Tc, so the labeling conditions of 188Re-DMSA(V) are diferent from the ones used for 99mTc- DMSA(V). 188Re-DMSA(V) is prepared in acid solution, that makes it possible to use the DMSA (III) comercial kit developed for labeling with 99mTc, prepared in pH 2.5, for labeling with 188Re. Labeling yields higher than 95% were achieved with this methodology, with a rection time of 30 minutes at 100oC using no more than 1 mL of 188ReO4 -. Another method of preparing 188Re-DMSA(V) was also evaluated, using a liquid kit containing 2.5mg of DMSA, 1.00mg of SnCl2.2H2O and 30mg of sodium oxalate at pH 5. This kit was labeled with 1 mL of 188ReO4 -, with 15 minutes of reaction at room temperature resulting in a labeling yield of about 91%.
30
Oliveira, Priscila Pinto de. "A influência da imprensa no processo de ampliação da transparência no TCE-RS". Pontifícia Universidade Católica do Rio Grande do Sul, 2012. http://hdl.handle.net/10923/1956.
Texto completoResumen
Made available in DSpace on 2013-08-07T18:44:56Z (GMT). No. of bitstreams: 1
000443169-Texto+Completo-0.pdf: 10651071 bytes, checksum: 09cbd4e87a0c6b144862fbfb23a32cb1 (MD5)
Previous issue date: 2012This dissertation analyses the media influence on introduction of transparency processes at Tribunal de Contas do Estado do Rio Grande do Sul (TCE-RS) between 2008 and 2011. In order to achieve this purpose, first we present the concepts of public transparency and accountability according the literature. The focus is to show how the media acts as an agent of social responsiveness. After, we expose the political context and the institutional changes that occurred at TCE-RS during the period in analyses. The media view of this time is also focused. The objective is to show the context of the decision making moments regarding transparency. Then, we analyses four interviews made with the men who were president of TCE-RS during the period in focus. The interview intent is to reveal factors that influenced the introduction of transparency processes at TCE-RS. Our findings indicate that media played a key role at these institutional changes.
Esta dissertação analisa a influência da imprensa na adoção de mecanismos de transparência pelo Tribunal de Contas do Estado do Rio Grande do Sul (TCE-RS) entre 2008 e 2011. Para contextualizar o tema, são apresentados os conceitos de transparência pública e accountability, além de suas dimensões e vertentes. O objetivo é jogar luz sobre a atuação da mídia como agente de responsabilização social. Em um segundo momento, é realizado um apanhado histórico do surgimento e da consolidação dos tribunais de contas do país, especialmente no Rio Grande do Sul. Em seguida, são expostas a conjuntura política e as mudanças institucionais sofridas pelo TCE-RS no período estudado e a visão da imprensa sobre a instituição à época. A intenção é reconstituir o cenário existente nos momentos de tomada de decisão em relação à transparência. Por último, a partir de entrevistas com os presidentes que estiveram à frente da instituição no período enfocado, busca-se demonstrar os fatores que influenciaram a Corte no sentido de ampliar a transparência das suas ações e de instituir canais de comunicação com a sociedade. A pesquisa indica que a imprensa foi um dos fatores fundamentais nessa mudança institucional.
31
Silva, Liliane Cristina de Além-Mar e. "Características clínico-epidemiológicas das ocorrências envolvendo traumatismo cranioencefálico (TCE) atendidos em um hospital universitário". Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/17/17139/tde-08112018-153237/.
Texto completoResumen
Traumatismos craniencefálicos (TCE) constituem a primeira causa de morte de vítimas de trauma que chegam vivas ao atendimento hospitalar, sendo causados, na sua grande maioria, por quedas e acidentes automobilísticos. Além da mortalidade, esses eventos produzem um grande número de casos de incapacidades temporárias ou permanentes, de modo especial em indivíduos jovens. O presente trabalho teve por objetivo estudar características clínicoepidemiológicas dos pacientes com TCE de todas as etiologias atendidos na Unidade de Emergência do Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto (UEHCFMRP) no período de 1º de janeiro de 2010 a 31 de dezembro de 2016 (componente 1) e a qualidade de vida das vítimas de TCE com alta hospitalar entre os dias 1º de janeiro e 31 de julho de 2015 (componente 2). Para o componente 1, foram analisadas informações de 3.775 pacientes com TCE notificados no banco de dados do Núcleo de Vigilância Epidemiológica Hospitalar. Após consentimento na participação, foi realizado o componente 2, em que 29 indivíduos foram visitados para a aplicação de instrumentos específicos para os objetivos do estudo, (SF-36, Escala de AVD de Lawton e Brody, HADS, FQ-VP, Questionário referente ao processo reabilitativo). Em todos os anos estudados, TCE foram predominantes em homens, brancos, jovens, solteiros, de baixa escolaridade e profissionalmente ativos. Em números absolutos, os acidentes de tráfego terrestre continuam sendo os mais frequentes mecanismos causadores de TCE. Após um ano de trauma a maioria das pessoas continua sem emprego e não incluída socialmente, e percebem comprometimento de sua qualidade de vida. Os resultados deste estudo permitem conhecer evidências sobre a previsibilidade do contexto da ocorrência do TCE, bem como das alterações de vida que ele promoverá ao traumatizado, independentemente do seu grau de gravidade. Tomadas em conjunto, essas informações podem nortear a implementação de estratégias preventivas que possam mitigar esse grave problema de saúde pública.Traumatic brain injuries (TBI) are the leading cause of death of trauma victims who are admitted to a hospital in the most severe cases due to falls and automobile accidents. In addition to mortality, these events produce a large number of cases of temporary or permanent disability, especially among young individuals. Such people undergo long and expensive rehabilitation processes, and typically require special adaptations and equipment, as well as teams of specialized staff. Still, most of them cannot, after the medium term, manage their own lives and re-start their daily activities and professional and school commitments. This study aimed to evaluate clinical and epidemiological characteristics of patients with TBI of all etiologies admitted to the Emergency Unit of Hospital das Clínicas of the Ribeirão Preto Medical School of (UE-HCFMRP) between January 1st, 2010 and December 31, 2016 (component 1) and quality of life among TBI victims between 1st January and 31st July 2015 (component 2). For component 1, information from 3,775 patients with TBI (reported to) was analyzed in the database of the Center for Hospital Epidemiological Surveillance. After consent to participation, component 2 was performed, in which 29 individuals were visited for the fullfilliing of specific tools for the study goals (SF-36, Lawton and Brody ADL Scale, HADS, FQ-VP, Reference Questionnaire to the rehabilitation process). In the whole studied interval, TBI were predominant among men, whites, youngsters, single, low education and professionally active people. In absolute numbers, traffic accidents continue to be the most frequent mechanism causing TBI. One year after hospital discharge, most people remain unemployed and socially excluded, and perceive impairment of their quality of life. The results of this study allow us to know the evidence about the predictability of the context of the occurrence of TBI, as well as life changes that it will determine to the traumatized, regardless of their degree of severity. Taken together, that information can lead the development of preventive strategies aimed to control this frequent and severe public health problem.
32
Viale, Rios Renzo. "Informe para la sustentación de expedientes: No. 1125-187-16 / No. 035-2016.TCE". Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/654689.
Texto completoResumen
El objeto del presente informe es brindar al jurado un resumen con las actuaciones más importantes del arbitraje bajo número de expediente 1125-187-16, llevado bajo las reglas del Centro de Arbitraje de la Pontificia Universidad Católica del Perú (en adelante, el Centro); así también, como un breve análisis y opinión del graduando sobre la decisión emitida por el Tribunal Arbitral.
En el arbitraje materia del presente informe, la parte demandante fue el Consorcio Sensus Jergo (conformado por las empresas Corporación Sensus S.A y el Consorcio Jergo Contratistas y Consultores S.A.C) (en adelante, el Consorcio o el Contratista de forma indistinta) y la parte demandada es el Programa Nacional de Infraestructura Educativa – PRONIED (en adelante, PRONIED o la Entidad de forma indistinta).Trabajo de suficiencia profesional
33
Ellis, James Brian. "The Feasibility of Bioaugmentation for the Remediation of Chlorinated Solvents: A Microcosm Study". Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/41386.
Texto completoResumen
Chlorinated solvents are among the most prevalent contaminants at Superfund sites. Perchloroethylene (PCE) and its degradative byproducts pose a particular problem because of their persistence in the subsurface and their threat to ecological health. In this study, microcosms were used to test the viability of bioaugmentation as a possible remediation strategy at a PCE contaminated site at the Naval Amphibious Base at Little Creek located in Virginia Beach, Virginia. All microcosms were created in duplicate using spatially diverse soils and the bioaugmented series innoculated with a mixed microbial culture provided by the Dr. Frank Loffler. This culture has been found to be capable of completely degrading PCE to ethene. The aqueous ethene concentration was monitored over time. It is clear from the results that bioaugmentation successfully increased the degree of reductive dechlorination over their static counterpart. Without innoculation, shallow static microcosms showed an accumulation of cis-DCE, while deep soils never showed conversion beyond TCE. Shallow bioaugmented microcosms showed the production and loss of vinyl chloride indicated probable complete conversion of PCE to ethene while deep soils showed the production of cis-DCE. These differences in dechlorination between shallow and deep soils indicate a possible disparity in reduction capacity. At day 78, microcosms were spiked with higher concentrations of PCE resulting in a reduction in dechlorination activity. Static microcosms exhibited similar degradative trends but bioaugmented batches experienced dramatic reductions in dechlorination activity indicating possible inhibition effects of native organisms due to concentration or potential toxic shock. It appears that bioaugmentation is a remediation alternative worthy of further study including possible delivery methods, toxicity or inhibition effects of concentration, and fate/transport studies.Master of Science
34
Calvette, Luara de Freitas. "Desempenho atencional de adultos pós AVC unilateral ou TCE no teste de cancelamento dos sinos". Pontifícia Universidade Católica do Rio Grande do Sul, 2012. http://hdl.handle.net/10923/4817.
Texto completoResumen
Made available in DSpace on 2013-08-07T19:07:56Z (GMT). No. of bitstreams: 1
000437216-Texto+Completo-0.pdf: 895942 bytes, checksum: f5b95d2182d468d69873678ea24b2f51 (MD5)
Previous issue date: 2012Attention is a cognitive function that is very often impaires in neurological disorders, such as stroke or traumatic brain injury (TBI). Among the instruments that evaluate visual selective attention by means of a cancellation paradigm, The Bells Test (BT) is one of the most used and internationally known. The study of hemineglect – syndrome in which patients neglect the contralateral or ipsilateral visual hemifield due to a neurological disorder- with tests of attention and visuoperception is still under development. This dissertation aimed to characterize the performance of patients with stroke or TBI in the BT. In the first study, we systematically reviewed articles with cancellation tasks in neuropsychological testing of these populations. Searching with the following keywords representing the constructs cancellation, stroke and TBI in the databases PubMed, PsycINFO and LILACS, we found 86 studies with 26 cancellation paradigms. In the second study we compared the performance between groups of 46 patients after unilateral stroke and 46 matched healthy controls, establishing as well the percentage frequency of deficits and analysed the dissociations between cases in TS. Patients with right brain damage (RBD) showed an inferior accuracy performance when compared to controls, also differing from left brain damaged adults (LBD), showing a slower speed processing. We identified 22% of RBD patients with HN, and a greater prevalence of disorganized strategies. In the third and last study, we compared the performance in TS between TBI patients and matched healthy controls. There was a poorer performance of patients with TBI with a greater number of omissions on the left side and lower speed processing. In addition, suggestive signs of HN were found in 38% of the sample of TBI patients. More research is needed to characterize clinical syndromes regarding the occurrence of HN after a TBI through the traditionally known cancellation paradigm.
A atenção é uma das funções cognitivas que se encontra muito frequentemente deficitária em populações clínicas neurológicas, tais como Acidente Vascular Cerebral e Traumatismo Cranioencefálico (TCE). O Teste de Cancelamento dos Sinos (TS), dentre os instrumentos que operacionalizam o paradigma de cancelamento destinados à avaliação neuropsicológica da atenção concentrada seletiva visual, é um dos mais utilizados e valorizados internacionalmente. O estudo da heminegligência – síndrome em que pacientes negligenciam o hemicampo visual contra ou ipsilateral à lesão neurológica – a partir da avaliação por testes de atenção e visuopercepção ainda está em desenvolvimento. Esta pesquisa buscou caracterizar a avaliação da atenção de pacientes com AVC ou TCE por tarefas de cancelamento visual, verificando-se como tais pacientes desempenham no TS. No primeiro estudo, revisaram-se sistematicamente pesquisas com tarefas de cancelamento no exame neuropsicológico destas populações. Com palavras-chave dos construtos cancelamento, AVC e TCE nas bases de dados PubMed, PsycINFO e LILACS, encontraram-se 86 estudos, com 26 paradigmas de cancelamento. No segundo estudo, foi comparado o desempenho entre grupos de 46 pacientes pós-AVC unilateral e 46 controles, o percentual da frequência de déficits, e de dissociações entre casos no TS. Os pacientes com lesão de hemisfério direito (LHD) apresentaram desempenho inferior aos controles em acurácia, diferenciando-se também dos com lesão de hemisfério esquerdo (LHE) pelo tempo maior de execução. Identificaram-se 22% dos pacientes com LHD com HN, além de um maior predomínio de estratégias desorganizadas. No terceiro e último estudo foi comparado o desempenho de pacientes com TCE e controles pelo TS. Os pacientes com TCE apresentaram pior escore de omissões à esquerda menos direita e maior tempo de execução. Foram observados dados sugestivos de HN em 38% da amostra. Mais pesquisas são necessárias para caracterizar as síndromes clínicas relacionadas à ocorrência de HN pós TCE através do tradicionalmente conhecimento paradigma de cancelamento.
35
Ogundare, Ojo Oluwaseun. "Optimization and Analysis of a Slow-Release Permanganate Gel for TCE Plume Treatment in Groundwater". Ohio University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou161797021188483.
Texto completo
36
Alvarado, Tamayo Abraham Hanabi. "Análisis de la Resolución N° 1259-2020-TCE-S1 del 26 de junio de 2020". Bachelor's thesis, Pontificia Universidad Católica del Perú, 2021. http://hdl.handle.net/20.500.12404/20016.
Texto completoResumen
El presente trabajo académico, tiene por objeto principal analizar y determinar la
eventual aplicación del impedimento para contratar con el Estado tipificado en el literal
a) del numeral 11.1 del artículo 11 de la Ley de Contrataciones del Estado, entre otros, a
los Jueces Supremos de la Corte Suprema de Justicia de la República, cuando aquellos
ejercen la función docente en una institución educativa superior.
Asimismo, de manera complementaria, se pretende establecer si resulta extensible la
infracción administrativa por presentar información inexacta, entre otros, a la Entidad,
en el marco de las contrataciones realizadas por montos iguales o inferiores a ocho (8)
Unidades Impositivas Tributarias.
Dichos objetivos se abordarán a partir de lo dispuesto en la Resolución N° 1259-2020-
TCE-S1 del 26 de junio de 2020, emitida por la entonces Primera Sala del Tribunal de
Contrataciones del Estado, en la que se emite pronunciamiento respecto al concurso de
infracciones por contratar con el Estado pese a estar impedido para ello, así como por
presentar información inexacta a la Entidad.
37
Ulsamer, Signe Martha. "A Model to Characterize the Kinetics of Dechlorination of Tetrachloroethylene and trichloroethylene By a Zero Valent Iron Permeable Reactive Barrier". Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/979.
Texto completoResumen
"A one dimensional, multiple reaction pathway model of the dechlorination reactions of trichloroethylene (TCE) and tetrachloroethylene (PCE) as these species pass through a zero valent iron permeable reactive barrier (PRB) was produced. Three different types of rate equations were tested; first order, surface controlled with interspecies competition, and surface controlled with inter and intra species competition. The first order rate equations predicted the most accurate results when compared to actual data from permeable reactive barriers. Sensitivity analysis shows that the most important variable in determining TCE concentration in the barrier is the first order rate constant for the degradation of TCE. The velocity of the water through the barrier is the second most important variable determining TCE concentration. For PCE the concentration in the barrier is most sensitive to the velocity of the water and to the first order degradation rate constant for the PCE to dichloroacetylene reaction. Overall, zero valent iron barriers are more effective for the treatment of TCE than PCE. "
38
Secrist, Philip Moyer III. "A Numerical Model (SEAM3D) to Assess the Biotransformation of Chlorinated Ethenes at a TCE/BTEX Contaminated Site". Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/42433.
Texto completoResumen
Numerical models (GMS MODFLOW, SEAM3D, and SEAM3D Interface) were applied to simulate groundwater flow, petroleum hydrocarbon compound (PHC) transport and biodegradation, and the transport and biotransformation of chlorinated ethenes at Site FT-002 Plattsburgh Air Force Base (PAFB), NY. Site FT-002 was contaminated with waste jet fuel and chlorinated ethenes used as a fire source during fire fighting training. The results of groundwater analysis indicated that the aquifer exhibited aerobic, nitrate reducing, ferrogenic, sulfate reducing and methanogenic conditions due to the biodegradation of the PHCs. Additional groundwater analysis showed the biotransformation of TCE to DCE, VC, and ethene. A numerical model was developed to simulate and assess the extent to which reductive dechlorination and direct anaerobic oxidation were responsible for the biotransformation of the chlorinated ethenes. Reductive dechlorination accounted for the 100%, 98.3%, and 97.5% of the biotransformation of TCE, DCE, and VC respectively. Direct anaerobic oxidation accounted for 1.7% and 2.5% of the biotransformation of DCE and VC respectively. Though direct anaerobic oxidation only accounted for a small percentage of total biotransformation it was necessary to fully develop the biotransformation of the DCE and VC in the ferrogenic zone. This study focused on the mechanisms responsible for the biotransformation of chlorinated ethenes, specifically reductive dechlorination and direct anaerobic oxidation. By further defining the NAPL source and initial conditions it could be used as a tool to accurately predict the monitored natural attenuation (MNA) of the FT-002 contaminant plume.Master of Science
39
Pramik, Paige N. "Optimization and Analysis of a Slow-Release Permanganate Gel for Dilute DNAPL Plume Remediation in Groundwater". Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1493742241376089.
Texto completo
40
Murphy, Samantha E. M. "Characterization of a TCE-contaminated aquifer using tritium-helium dating and geochemical tracers, Valcartier, Quebec, Canada". Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28386.
Texto completoResumen
The groundwater supply in the Valcartier area of Quebec is contaminated with trichloroethylene (TCE) from multiple sources, and hydrogeologic characterization is being carried out to understand its origin and migration patterns. A geochemical investigation was undertaken to independently verify groundwater flow and TCE transport in Valcartier groundwater to improve a numerical model that is currently being developed.
3H-3He ages were obtained along flow paths stemming from two main source zones and compared with advective model ages produced at corresponding locations. Ages obtained above and below a prodeltaic silty aquitard in the eastern part of the study area were used to calculate an average vertical hydraulic conductivity (Kv) of 1.3-3.1x10-8 m/s. 3H-3He ages were compared with modelled ages at different values of porosity (n) and recharge; the bestcorrespondence was found to be at 0.35 and 300 mm/yr, respectively. Anomalously high concentrations of terrigenic He and unexpectedly old 3H-3He ages in some areas indicate areas where groundwater in the underlying proglacial aquifer may flow upward into the deltaic sand aquifer.
Geochemical parameters measured in groundwater along the flow paths as well as in Shannon and in the proglacial aquifer were examined for patterns. Multivariate statistics (Principal components analysis and cluster analyses) were applied to the data to distinguish different types of groundwater; the geochemistry of each group reflects recharge origin and lithology encountered. The groups verify flow paths delineated by the groundwater model, and help distinguish groundwater of different origins downgradient of source zones. One facies in particular is associated with high TCE concentrations and occurs where groundwater upflow from the proglacial aquifer in Shannon inferred from the 3H-3He data. This appears to be TCE coming from a previously unrecognized source in the south part of the study area, possibly an old bedrock dump.
This study demonstrates the value of integrating geochemical information in groundwater characterization programs with existing information to refine the understanding of groundwater flow, especially in the development of numerical models.
41
Laureano, Rodrigo Vargas. "Fatores institucionais explicativos das decisões do TCE-RS sobre as prestações de contas dos prefeitos municipais". Universidade do Vale do Rio dos Sinos, 2017. http://www.repositorio.jesuita.org.br/handle/UNISINOS/6226.
Texto completoResumen
Submitted by Silvana Teresinha Dornelles Studzinski (sstudzinski) on 2017-04-19T15:33:22Z
No. of bitstreams: 1
Rodrigo Vargas Laureano_.pdf: 869128 bytes, checksum: a3d5bbe7b2f89ed30a118d117b4b0356 (MD5)Made available in DSpace on 2017-04-19T15:33:22Z (GMT). No. of bitstreams: 1 Rodrigo Vargas Laureano_.pdf: 869128 bytes, checksum: a3d5bbe7b2f89ed30a118d117b4b0356 (MD5) Previous issue date: 2017-01-13
Nenhuma
As Organizações Superiores de Auditoria, tais como os Tribunais de Contas, possuem uma relevante função no que tange à Governança Pública. Neste contexto, o presente estudo teve como objetivo identificar os fatores explicativos em relação aos Pareceres Prévios emitidos pelo TCE-RS nos processos de prestação de contas dos Prefeitos Municipais. A análise das evidências foi realizada à luz da Nova Teoria Institucional, na perspectiva de Douglass North. Essa que pressupõe que o objetivo das instituições é estabelecer uma estrutura de interação humana capaz de reduzir a incerteza nas relações em uma dada sociedade. Em outras palavras, as Instituições configuram-se como regras formais e informais, que estruturam as ações organizacionais. Nesta pesquisa, as regras formais referem-se aos aspectos regimentais relacionados aos processos de prestação de contas. De outra parte, as regras informais correspondem aos procedimentos não normatizados que, eventualmente, podem representar constrangimentos ao TCE-RS para a emissão de Parecer Prévio Desfavorável. Com base na revisão da literatura teórica e empírica foram formuladas 2 hipóteses principais, complementadas por um conjunto de 12 subhipóteses. As hipóteses foram testadas a partir de variáveis relacionadas às regras formais e de variáveis relacionadas às regras informais, sendo estimados modelos de regressão logística, cuja variável dependente binária é o Parecer Prévio emitido: Favorável ou Desfavorável. Foram examinados 3.968 processos relativos aos exercícios de 2005 a 2012 dos 496 municípios gaúchos. Os resultados indicam que as decisões do TCE-RS, em relação ao Parecer Prévio, são influenciadas por regras formais e por regras informais. Os aspectos formais referem-se à LRF e às inconformidades apontadas pelos Auditores. Enquanto que os aspectos informais dizem respeito à forma de provimento do Relator do Processo, à condição socioeconômica do Município e ao tempo de existência do mesmo. Aspectos relacionados ao tamanho e à localização do Município, bem como ao Partido do Prefeito, também foram testados, porém não apresentaram significância estatística. Este estudo permite que a sociedade conheça o TCE-RS, bem como os elementos que influenciam no seu processo decisório. Além disto, fornece subsídios para a discussão relativa à dicotomia existente entre a prevalência dos aspectos técnicos ou não técnicos nas decisões do órgão.
The Supreme Audit Institutions, such as Audit Courts, have a relevant role regarding Public Governance. In this context, this research has the aim to identify the factors with probability of explanation in relation to Pareceres Prévios (Previous Feedback) issued by TCE-RS in the processes concerning the provided accounts by Municipal mayors. The analysis of the evidence was carried by the light of New Institutional Theory, on Douglass North’s perspective, which presupposes that the aim of the institutions is to establish a structure of human interaction capable of reducing uncertainty in relationships in a given society. In other words, the Institutions are framed as formal and informal rules, which give foundation to the organizational actions. In this research, the formal rules refer to the regimental aspects related to provided accounts processes. The informal rules refer to non-standard procedures that may eventually represent constraints to TCE-RS for the issurance of an unfavorable Parecer Prévio. Based on the review of the theoretical and empirical literature, two main hypotheses were formulated, complemented by a set of twelve sub-hypotheses. The hypotheses were tested from variables related to formal rules and variables related to informal rules, and a logistic regression model is estimated, whose binary dependent variable is the Parecer Prévio issued: Favorable or Unfavorable. Were examined the processes related to the years 2005 to 2012 of 496 municipalities of the State of Rio Grande do Sul, 3,968 cases in total. The results of the estimated final model indicate that the decisions of the TCE-RS, in relation to the Parecer Prévio, are influenced by formal rules and by informal rules. The formal aspects refer to the Fiscal Responsability Law and to the nonconformities pointed out by the Audit Teams. While the informal aspects concern the form of provision of the Magistrate rapporteur of the process and the age, the socioeconomic condition of the Municipalities and the time of existence of the Municipalities. Aspects related to size and localization of the Municipality, as well as to the Mayor's Political Party, were also tested, but were not statistically significant. This research allows the society to know the TCE-RS, as well as the elements that influence its decision-making process. In addition, it provides an important contribution to the discussion of the dichotomy between the prevalence of technical or non-technical aspects in the decisions of TCE-RS.
42
Calvette, Luara de Freitas. "Desempenho atencional de adultos p?s AVC unilateral ou TCE no teste de cancelamento dos sinos". Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2012. http://tede2.pucrs.br/tede2/handle/tede/777.
Texto completoResumen
Made available in DSpace on 2015-04-14T13:22:00Z (GMT). No. of bitstreams: 1
437216.pdf: 895942 bytes, checksum: f5b95d2182d468d69873678ea24b2f51 (MD5)
Previous issue date: 2012-01-17Attention is a cognitive function that is very often impaires in neurological disorders, such as stroke or traumatic brain injury (TBI). Among the instruments that evaluate visual selective attention by means of a cancellation paradigm, The Bells Test (BT) is one of the most used and internationally known. The study of hemineglect syndrome in which patients neglect the contralateral or ipsilateral visual hemifield due to a neurological disorder- with tests of attention and visuoperception is still under development. This dissertation aimed to characterize the performance of patients with stroke or TBI in the BT. In the first study, we systematically reviewed articles with cancellation tasks in neuropsychological testing of these populations. Searching with the following keywords representing the constructs cancellation, stroke and TBI in the databases PubMed, PsycINFO and LILACS, we found 86 studies with 26 cancellation paradigms. In the second study we compared the performance between groups of 46 patients after unilateral stroke and 46 matched healthy controls, establishing as well the percentage frequency of deficits and analysed the dissociations between cases in TS. Patients with right brain damage (RBD) showed an inferior accuracy performance when compared to controls, also differing from left brain damaged adults (LBD), showing a slower speed processing. We identified 22% of RBD patients with HN, and a greater prevalence of disorganized strategies. In the third and last study, we compared the performance in TS between TBI patients and matched healthy controls. There was a poorer performance of patients with TBI with a greater number of omissions on the left side and lower speed processing. In addition, suggestive signs of HN were found in 38% of the sample of TBI patients. More research is needed to characterize clinical syndromes regarding the occurrence of HN after a TBI through the traditionally known cancellation paradigm.
A aten??o ? uma das fun??es cognitivas que se encontra muito frequentemente deficit?ria em popula??es cl?nicas neurol?gicas, tais como Acidente Vascular Cerebral e Traumatismo Cranioencef?lico (TCE). O Teste de Cancelamento dos Sinos (TS), dentre os instrumentos que operacionalizam o paradigma de cancelamento destinados ? avalia??o neuropsicol?gica da aten??o concentrada seletiva visual, ? um dos mais utilizados e valorizados internacionalmente. O estudo da hemineglig?ncia s?ndrome em que pacientes negligenciam o hemicampo visual contra ou ipsilateral ? les?o neurol?gica a partir da avalia??o por testes de aten??o e visuopercep??o ainda est? em desenvolvimento. Esta pesquisa buscou caracterizar a avalia??o da aten??o de pacientes com AVC ou TCE por tarefas de cancelamento visual, verificando-se como tais pacientes desempenham no TS. No primeiro estudo, revisaram-se sistematicamente pesquisas com tarefas de cancelamento no exame neuropsicol?gico destas popula??es. Com palavras-chave dos construtos cancelamento, AVC e TCE nas bases de dados PubMed, PsycINFO e LILACS, encontraram-se 86 estudos, com 26 paradigmas de cancelamento. No segundo estudo, foi comparado o desempenho entre grupos de 46 pacientes p?s-AVC unilateral e 46 controles, o percentual da frequ?ncia de d?ficits, e de dissocia??es entre casos no TS. Os pacientes com les?o de hemisf?rio direito (LHD) apresentaram desempenho inferior aos controles em acur?cia, diferenciando-se tamb?m dos com les?o de hemisf?rio esquerdo (LHE) pelo tempo maior de execu??o. Identificaram-se 22% dos pacientes com LHD com HN, al?m de um maior predom?nio de estrat?gias desorganizadas. No terceiro e ?ltimo estudo foi comparado o desempenho de pacientes com TCE e controles pelo TS. Os pacientes com TCE apresentaram pior escore de omiss?es ? esquerda menos direita e maior tempo de execu??o. Foram observados dados sugestivos de HN em 38% da amostra. Mais pesquisas s?o necess?rias para caracterizar as s?ndromes cl?nicas relacionadas ? ocorr?ncia de HN p?s TCE atrav?s do tradicionalmente conhecimedo paradigma de cancelamento.
43
Oliveira, Priscila Pinto de. "A influ?ncia da imprensa no processo de amplia??o da transpar?ncia no TCE-RS". Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2012. http://tede2.pucrs.br/tede2/handle/tede/4708.
Texto completoResumen
Made available in DSpace on 2015-04-14T14:46:10Z (GMT). No. of bitstreams: 1
443169.pdf: 10651071 bytes, checksum: 09cbd4e87a0c6b144862fbfb23a32cb1 (MD5)
Previous issue date: 2012-07-30This dissertation analyses the media influence on introduction of transparency processes at Tribunal de Contas do Estado do Rio Grande do Sul (TCE-RS) between 2008 and 2011. In order to achieve this purpose, first we present the concepts of public transparency and accountability according the literature. The focus is to show how the media acts as an agent of social responsiveness. After, we expose the political context and the institutional changes that occurred at TCE-RS during the period in analyses. The media view of this time is also focused. The objective is to show the context of the decision making moments regarding transparency. Then, we analyses four interviews made with the men who were president of TCE-RS during the period in focus. The interview intent is to reveal factors that influenced the introduction of transparency processes at TCE-RS. Our findings indicate that media played a key role at these institutional changes.
Esta disserta??o analisa a influ?ncia da imprensa na ado??o de mecanismos de transpar?ncia pelo Tribunal de Contas do Estado do Rio Grande do Sul (TCE-RS) entre 2008 e 2011. Para contextualizar o tema, s?o apresentados os conceitos de transpar?ncia p?blica e accountability, al?m de suas dimens?es e vertentes. O objetivo ? jogar luz sobre a atua??o da m?dia como agente de responsabiliza??o social. Em um segundo momento, ? realizado um apanhado hist?rico do surgimento e da consolida??o dos tribunais de contas do pa?s, especialmente no Rio Grande do Sul. Em seguida, s?o expostas a conjuntura pol?tica e as mudan?as institucionais sofridas pelo TCE-RS no per?odo estudado e a vis?o da imprensa sobre a institui??o ? ?poca. A inten??o ? reconstituir o cen?rio existente nos momentos de tomada de decis?o em rela??o ? transpar?ncia. Por ?ltimo, a partir de entrevistas com os presidentes que estiveram ? frente da institui??o no per?odo enfocado, busca-se demonstrar os fatores que influenciaram a Corte no sentido de ampliar a transpar?ncia das suas a??es e de instituir canais de comunica??o com a sociedade. A pesquisa indica que a imprensa foi um dos fatores fundamentais nessa mudan?a institucional.
44
Sehnem, Clarissa Garcia Corrêa. "Cooperação interorganizacional no setor público : o arranjo entre a EG/FDRH e a ESGC/TCE-RS". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/165639.
Texto completoResumen
Esta dissertação buscou analisar um arranjo de cooperação interorganizacional no setor público direcionado para a qualificação dos servidores públicos no que tange à gestão e fiscalização de contratos. O objetivo principal foi compreender como se formou o arranjo de cooperação entre a Escola de Governo (EG)/FDRH e a Escola de Gestão e Controle Francisco Juruena/TCE-RS, assim como sua atuação na legitimação de práticas padronizadas relacionadas à gestão e fiscalização de contratos públicos no âmbito do Rio Grande do Sul através da operacionalização de um curso na modalidade EAD. Trata-se de um estudo de caso predominantemente qualitativo com base em: 1) pesquisa documental para compreensão dos fatores históricos e características das duas organizações que realizaram a cooperação; 2) entrevistas semiestruturadas com os principais atores que participaram do processo decisório em relação à formação, operacionalização e avaliação dos principais resultados do arranjo de cooperação; e 3) questionários enviados aos alunos aprovados na primeira edição do curso para identificar sua percepção sobre a relevância do Curso de Gestão e Fiscalização de Contratos EAD. Como principais resultados desta pesquisa, percebe-se que o curso vem atingindo seus objetivos ao padronizar a atividade dos fiscais e gestores de contratos públicos, assim como as edições EAD suportadas pelo arranjo de cooperação interorganizacional atingiram um número maior de alunos/servidores, com menor custo e com abrangência de servidores de um maior número de municípios.This dissertation had the intent to analyze an interorganizational arrangement within the public sector related to the qualification of the public sector employees regarding inspections and Management of Contracts. The main objective was to understand how the cooperation arrangement between the Government School/ FDRH and the Management and Control School Francisco Juruena/TCE-RS was established, as well as its performance in the legitimation of isomorphic practices related to the management and inspection of public contracts within Rio Grande do Sul’s scope, via the operationalization of an EAD course. This is a predominantly qualitative study based on: 1) documented research to understand the historical factors and characteristics of the two organizations that practiced the cooperation; 2) semi-structured interviews with the main players who participated in the decision-making process regarding the establishment, operationalization and evaluation of the main results of the cooperation arrangement; and 3) questionnaires sent to the course’s first edition approved students in order to capture their perception about the relevance of the EAD Contracts Management and Inspection course. It was perceived, via the main results of this research, that the course reached its objectives as part of an institutionalization process that seeks to standardize the activity of inspection and public contract managers; As well as the EAD editions supported by the interorganizational cooperation arrangement reached a greater number of students /employees, with lower cost and with the inclusion of public employees from a greater number of municipalities;
45
Ribeiro, Sofia Margarida Pires. "Reductive dechlorination of TCE and cis-DCE by zero-valent iron and iron-based bimetallic reductants". Master's thesis, Universidade de Évora, 2016. http://hdl.handle.net/10174/19430.
Texto completoResumen
CEs are the most frequently detected pollutants in groundwater. Several studies have been shown iron-based bimetallic reductants as a good method toward to chlorinated ethylenes degradation. However, many fundamental issues surrounding the chemistry of this phenomena remains elusive.
In this study, kinetics and compound specific isotope analysis for reductive dechlorination of TCE and cis-DCE by unamended iron and iron-based bimetal reductants was evaluated. Generally, all the bimetals reductants tested revealed to increase the reactivity of the degradation, in which palladium and nickel were the additional metals more reactive. Ethene and ethane were the major products of TCE degradation.
It is supported the simultaneous hydrogenolysis and β-elimination reaction hypothesis, however, the first step of TCE degradation by Au/Fe undergoes preferably by β-elimination, while by unamended iron, Pt/Fe and Co/Fe goes preferably by hydrogenolysis. No apparent elucidation was obtained to explain the high reactivity on bimetals systems; Degradação do TCE e cis-DCE por ferro de valência zero e redutores bimetálicos à base de ferro
Resumo:
Etilenos clorados são os poluentes mais frequentemente detetados na água subterrânea. Vários estudos têm mostrado que redutores bimetálicos à base de ferro são um bom método para a degradação dos etilenos clorados. Porém, muitas questões fundamentais acerca da química deste fenómeno permanecem elusivas.
Neste estudo foi avaliada a cinética e a análise isotópica de compostos específicos para a degradação do TCE e cis-DCE por ferro e redutores bimetálicos à base de ferro. Genericamente, os redutores bimetálicos mostraram aumentar a reatividade da degradação, sendo paládio e níquel os metais adicionais mais reativos. Os produtos principais da degradação do TCE foram eteno e etano.
É apoiada a hipótese da simultaneidade de hidrogenólise e β-eliminação, porém, o primeiro passo da degradação do TCE por Au/Fe é realizada preferencialmente por β-eliminação, enquanto por ferro, Pt/Fe e Co/Fe é realizada preferencialmente por hidrogenólise. Não houve uma elucidação aparente para explicar a reatividade nos sistemas bimetálicos.
46
Cooney, Margaret Faye. "The Effect of Cyclodextrin on Reductive Dechlorination". Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/30966.
Texto completoResumen
Microcosms were constructed from aquifer sediment samples taken from an actively degrading chlorinated solvent contaminated site located in Virginia Beach, Virginia. The objective of this study was to determine if and how the addition of cyclodextrin (CD) affects reductive dechlorination of chlorinated ethenes. After chlorinated solvent degradation rates were established in anaerobic and aerobic microcosms, 100 mg/L of CD solution was added for a period of 21 days. CD was then removed after 26 days to simulate the degradation response of the aquifer in a post CD injection environment. Degradation rates were determined by analyzing PCE, TCE, and cis-DCE concentration data over the various phases of the experiment.
Results from this study indicated that chlorinated solvent degradation could be either impaired or facilitated by the addition of CD. CD appeared to stimulate one anaerobic microcosm (IY-2c) where daughter production had not previously occurred. The activity of this microcosm was greatly enhanced by the addition of CD (0 uM/day to 13.89 uM/day). However, biotransformation of PCE in another anaerobic microcosm in which reductive dechlorination was occurring, ceased after the addition of CD (IY-1a). In a third group of microcosms the rate and extent of reductive dechlorination was greatly enhanced by the addition of CD.
The effect of adding CD was also found to be highly dependent on the redox conditions in the microcosm, specifically if the conditions were strongly reducing. The most active microcosms, found in the Aerobic Group, also had the lowest ferrous iron concentrations (3.57 mg/L for BY-1a, 2.25 mg/L for BY-1b, and 0.41 mg/L for BY-1c). The microcosm (IY-2b) that showed no daughter production had the highest level of ferrous iron (44.22 mg/L). This study presents a qualitative approach to the affect of CD on MNA.Master of Science
47
Lee, Shang-Chang y 李尚璋. "Fenton Oxidation of TCE DNAPL". Thesis, 2000. http://ndltd.ncl.edu.tw/handle/24251706971927126149.
Texto completoResumen
碩士國立屏東科技大學
環境工程與科學系
88
Trichloroethylene (TCE）is a common industrial chemical. It is often found in the contaminated groundwater aquifer. Trichloroethylene is heavier than water, and only solublize slightly; therefore, a large spill of TCE is likely to move downward through the subsurface until lower permeability features impede its progress. This often results in the formation of a plume or pool(s) of dense nonaqueous phase liquid (DNAPL）in the aquifer plus a trail of residual DNAPL in the downward path. The TCE DNAPL is the source of vapor, disssolved, and sorbed phase of pollutants. TCE was used as an index compound in this study to evaluate the feasibility of chemical oxidation by Fenton''s reagent at natural soil pH=7.1. Two soil samples with different characteristics were collected form Pingtung Country, Taiwan. The WD soil is a loamy sand with higher soil organic matter(SOM) content of 11.8g/kg , The YP soil, sampled form the aquifer of an illegal dumping site, is a sand with low SOM content（0.7g/kg）. This study evaluated factors such as Fe2+ concentration, H2O2 dose, reaction time, TCE concentration, and SOM content of soil on the oxidation efficiency. The results showed that the Fenton''s reagent could oxidize TCE in water at natural pH. When TCE concentration of water at concentration near water-saturation（1100.0 mg/L=8.4mM）, the best oxidation concentration of H2O2, Fe2+, and reaction time were 588.2mM, 2.0mM, and 50min, respectively. When TCE concentration of water-DNAPL phase was 22.8mM, the best oxidation concentration of H2O2, Fe2+, and reaction time were 588.2mM, 10.0mM, and 840 min, respectively. The removal rate of TCE was 98.5%. The optimum oxidation condition for 22.8mM of TCE in the water-sorpted-DNAPL phase of TCE were H2O2=588.2mM, Fe2+=2.0mM, and reaction time of 840 min. The removal rate of TCE for WD soil was 52.3%, but for YP soil was 89.6%. Because SOM and TCE competed for the ‧OH, the WD soil was oxidized less efficiently than the YP soil.
48
Li, Chen-Huei y 李宸輝. "Acclimation of Methanotrophic Bacteria from the Trichloroethylene (TCE) Contaminated Site and their TCE Aerobic Cometabolism Study". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/sq8b67.
Texto completoResumen
碩士國立雲林科技大學
環境與安全衛生工程系
108
Nowadays, anaerobic reductive dechlorination is highly adopted for in situ bioremediation of chlorinated ethylenes (CEs). This degradation pathway has a great conversion efficiency on high-chlorinated ethylenes, such as tetrachloroethylene (PCE) and trichloroethylene (TCE). However, the dechlorination rate significantly decreases as the released number of chlorine atoms increases. This may cause incomplete dechlorination of CEs. Aerobic cometabolism is another remediated strategy that can be used for CEs. By the action of non-specific enzymes, CEs can be converted into unstable epoxides and epoxides are further decomposed into harmless substances. Therefore, not only remediation period is shortened, but also accumulation of low-chlorinated ethylenes is avoided. In this study, two methanotrophic consortia were collected from the groundwater contaminated by TCE and acclimated with methane and TCE. The TCE aerobic cometabolism ability of the acclimated methanotrophic consortia was investigated during the enrichment period. Furthermore, the changes of the consortia community and functional genes related to methane metabolism were both analyzed using molecular biotechnology during acclimation. Afterward, the effects of the environmental factors on TCE aerobic cometabolism and methane monooxygenase activity were investigated by a series of batch experiments. Finally, the experimental data of methane utilization and TCE degradation were calculated to realize the fitness of the Monod equation or Haldane equation. The biotoxicity was also measured after aerobic cometabolism treatment by Microtox assay. The enriched methanotrophic consortia MW-2 and MW-A stably utilized methane and degraded TCE during domestication. The highest TCE concentration for enrichment was 0.4 mg/L. Strain uncultured Methylocystis sp. were identified from the native consortia MW-A. However, after acclimation, the methanotrophic bacteria became undetectable, but the restricted facultative methylotrophic Methylophilus was identified. In addition, the results of the methanotrophic functional gene mxaF indicated that strain Methylosinus sporium and Methylosinus trichosporium, and Methyloversatilis discipulorum and Methylobacterium sp. were identified from the consortia MW-2 and MW-A, respectively. The functional gene pmoA was successfully amplified during enrichment, but mmoX was only amplified when adding 0.1 mg/L TCE for acclimation. The best TCE removal of both consortia was obtained at the initial pH of 7 and 20℃. Increasing methane concentration slightly improved TCE degradation. On the contrary, increasing TCE concentration significantly suppressed methane utilization. When the concentration of copper ions increased, the activity of soluble methane monooxygenase decreased. Adding 0.2 μM copper ions had the best TCE degradation. The methane utilization and TCE degradation of both consortia followed the Monod equation and Haldane equation, respectively. After Microtox analysis, all groups of various TCE concentrations batch experiment belonged to Class I (no toxicity) or Class II (slight toxicity) except for 2.4 mg/L TCE group. In summary, aerobic cometabolism strategy is potentially applied to remediate TCE contaminated site using methanotrophs.
49
CANOSA, ANDREA. "Dealogenazione Riduttiva del TCE bioelettricamente assistita". Doctoral thesis, 2010. http://hdl.handle.net/11573/917648.
Texto completo
50
Chang, Chaio-Yang y 張喬揚. "Dechlorination and Decarboxylation of Trichloroethylene(TCE) caralyzed by δ-MnO2 in TCE Contaminated WaterUnder Aerobic/Anerobic Conditions". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/27933970261875746879.
Texto completoResumen
碩士朝陽科技大學
環境工程與管理系碩士班
99
Trichloroethylene and other chlorinated organic compounds such as chlorinated aliphatic hydrocarbons are widely used in a variety of commercial purposes and are common pollutants in groundwater due to low boiling point, high solubility and chemical stability. Considerable amount of soil and ground water have been contaminated as a result of leaks from underground storage tanks, man-made accidental emissions and improper disposal. Chemical oxidation of organic chlorine is one of the potential remediation methods where the process is within the source zone in subsurface environment, and the oxidant having high oxidation properties could reduce the complex contaminants to smaller non-pollutant compounds by rapid destruction. Manganese oxide is a very common mineral component present in the mineral soil. Hence, in this study, synthesized micro nano-sized particles of δ-MnO2 were used as catalyst, simulations at the bottom of the soil pollution of groundwater by TCE, usage of formerly designed gas absorption reaction flask, investigating under aerobic and anaerobic (passing nitrogen) conditions, adding δ-MnO2 for mineralization, decarboxylation (CO2 evolution) and dechlorination (release of Cl－) reactions of TCE. After completion of the experimental process of TCE under aerobic and anerobic conditions in presence δ-MnO2, the two modules of oxidation and reduction reactions differences were compared. The results showed that under aerobic conditions having no microbial activity, addition of δ-MnO2 promotes oxidation of TCE mineralization, decarboxylation and dechlorination. However, in the absence of oxygen (passing nitrogen), addition of δ-MnO2 promoted mineralization of TCE, but IV the amount of decarboxylation is less compared to aerobic conditions, while dechlorination was found to be the major reaction. These experiments implicates that δ-MnO2 under non-biological activity conditions causes breakdown of TCE structure and releases CO2 and Cl－, and when the reaction time period is increased, increase in the release of CO2 and Cl－ is observed, whereas this trend is not observed in absence of pollutants. The release of CO2 and Cl－molar ratio was calculated under different reaction mechanisms. By the laboratory simulation of contaminated sites and the data obtained from different parameters, this process can be extended for further studies on TCE contaminated soil and water sites and this remediation process is very useful, especially for the underlying groundwater saturated soil layer of contaminated TCE.