Dissertations / Theses on the topic 'Dioxins'
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Jansson, Stina. "Thermal formation and chlorination of dioxins and dioxin-like compounds." Doctoral thesis, Umeå universitet, Kemi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1881.
Full textDenna avhandling fokuserar på olika aspekter som kan bidra till en ökad förståelse av bildning av dioxiner och dioxin-lika föreningar i förbränningsprocesser. Även om utsläppen till luft från sopförbränningsanläggningar har minskat kraftigt tack vare effektiva rökgasreningsmetoder, så återstår problemet med mycket giftiga rökgasreningsprodukter (askor och filter), vilka klassificeras som farligt avfall. Det huvudsakliga syftet med arbetet bakom denna avhandling var att klarlägga bildnings- och kloreringsvägarna för dioxiner och dioxin-lika föreningar i temperaturintervallet 640-200°C i rökgaser från sopförbränning. Detta kan möjliggöra lösningar för ytterligare emissionsminskningar och en avgiftning av biprodukterna från avfallsförbränning, vilket minskar eller till och med eliminerar behovet av kostsam och riskfylld efterbehandling. Realistiska och välkontrollerade försök har utförts i en lab-skalereaktor där en artificiell hushållssopa har förbränts. En jämförelse av fyra olika temperatur- och uppehållstidsprofiler visade att bildning av polyklorerade dibenso-p-dioxiner (PCDD) och dibensofuraner (PCDF) sker snabbt och huvudsakligen inom temperaturintervallet 640-400°C. Bildningen var starkt beroende av en tillräckligt lång uppehållstid inom ett visst temperaturområde. En förlängd uppehållstid vid höga temperaturer (>450°C) resulterade i minskade halter av PCDD, vilka förhöll sig låga även senare i efterförbränningszonen. Isomermönstren av PCDD, PCDF och PCN (polyklorerade naftalener) visade alla tecken på att härröra från både klorfenolkondensation och kloreringsreaktioner. PCDD-mönstret visade tydliga indikationer på bildning från klorfenoler, och till mindre grad bildning via klorering. För PCDF var klorsubstitution i positioner angränsande till syrebryggan missgynnad, vilket bekräftades av multivariat modellering (O2PLS). Den variabel som starkast påverkade bildningen av PCDD var relativa fria energin (RΔGf). Modellerna visade på en distinkt gruppering av PCDD- och PCDF-kongenerna i två eller tre grupper för varje kloreringsgrad, och föreslås vara relaterad till sannolikheten för respektive kongen att bildas via klorfenolkondensation. Injektion av aromatiska kolstrukturer i rökgaskanalen gav upphov till skilda effekter. Injektion av naftalen ökade bildningen av monoklorerad naftalen medan resterande homologer inte verkade påverkas, sannolikt på grund av för kort uppehållstid för ytterligare klorering. Dibenso-p-dioxin spjälkades sannolikt till fenoliska fragment som klorerades och sedan återkondenserades till PCDD och PCDF, medan dibensofuran och fluoren kraftigt reducerade PCDD-koncentrationerna.
Furness, Sebastian George Barton. "Novel mechanisms for activation of the dioxin (Aryl-hydrocarbon) receptor /." Title page, table of contents and summary only, 2003. http://web4.library.adelaide.edu.au/theses/09PH/09phf988.pdf.
Full textGao, Qiuju. "Dioxins and dioxin-like compounds in thermochemical conversion of biomass : formation, distribution and fingerprints." Doctoral thesis, Umeå universitet, Kemiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-118861.
Full textPrange, Joelle, and n/a. "Origin of Dioxins in Queensland: Investigations into the Distribution and Sources of Polychlorinated Dibenzo-P-Dioxins in the Queensland Terrestrial Environment." Griffith University. School of Public Health, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040615.161651.
Full textPrange, Joelle. "Origin of Dioxins in Queensland: Investigations into the Distribution and Sources of Polychlorinated Dibenzo-P-Dioxins in the Queensland Terrestrial Environment." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/367289.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Public Health
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Machado, Diego Henrique de Oliveira. "Investigação das propriedades ópticas, morfológicas e elétricas da heterojunção SnO2:Ce3+/GaAs /." Bauru, 2016. http://hdl.handle.net/11449/135900.
Full textBanca: Dayse Iara dos Santos
Banca: Anrea Simone Stucchi de Camargo
O Programa em Pós Graduação em Ciência e Tecnologia de Materiais, PosMat, tem caráter institucional e integra as atividades de pesquisa em materiais de diversos campi
Resumo: Este trabalho apresenta o desenvolvimento e algumas conclusões do estudo de heterojunção de filmes finos de SnO2 e GaAs. Os filmes de SnO2 dopados com Ce3+, foram depositados a partir do método sol-gel usando as técnicas de dip e spin coating; os filmes de GaAs foram depositadas por evaporação resistiva e por sputtering. As heterojunções foram constituídas de filmes de SnO2 sobre filmes de GaAs, e filmes de GaAs sobre filmes de SnO2. Foram investigadas as propriedades ópticas, estruturais, morfológicas e elétricas de filmes finos constituintes das heterojunções e também a influência do dopante Ce3+. Entre os experimentos realizados estão: transmitância óptica, difração de raios X, microscopia eletrônica de varredura (MEV), microscopia óptica, microscopia de força atômica (AFM), fotoluminescência e medidas elétricas na presença de excitações com diferentes fontes de luz monocromáticas (quarto harmônico do laser Nd:Y AG (266nm), laser He-Ne (628nm), LED InGaN (450nm)). Entre as principais conclusões, verificou-se: 1) em algumas situações, condutividade independente da temperatura, sugerindo a participação de um gás de elétrons bidimensional (2DEG) na interface SnO2/GaAs; 2) o tamanho dos cristalitos, calculado a partir das análises de difração de raios X, fornece valores da ordem de 10 nm tanto para filmes de SnO2 como para filmes de GaAs; 3) a energia de bandgap, avaliada com base em dados de medidas de absorbância, fornece um valor máximo de 3,6 eV para filmes de dióxido de estanho e 1,6eV para filmes de GaAs; 4) MEV e microscopia óptica de para filmes de GaAs (depositado por evaporação resistiva e sputtering) apresentam sua superfície heterogênea, com partículas de variados tamanhos. Além disso, a aderência de filmes de SnO2 sobre filmes de GaAs está relacionada com a técnica utilizada para depositar os filmes da camada de base, o melhor resultado foi obtido quando a camada é a GaAs...
Abstract: The aims of this work is to present the development and the main conclusion, related the investigation of thin film SnO2/GaAs. Os filmes de SnO2/GaAs heterojunction. Ce3+ - doped SnO2 thin films were deposited by the sol-gel-dip -spin coating techniques, whereas GaAs films were deposited by resistive evaporation and sputerring. Heterojunctions were deposited by SnO2 layer growth on the oppositive order: GaAs on top of SnO2 Optical, structural, morphologic and electrical properties of heterojunction films were investigated, as well as the influence of Ce-doping in these measurements. Experiments carried out include: optical transmission, X-ray diffraction, scanning eletron microscopy (SEM), optical microscopy, atomic force microscopy (AFM), photoluminescence and electrical measurement under optical excitation. In this last case the excitation sources are monochromatic light from the fouth harmonic of a Nd:YAG laser (266nm), a He-Ne laser (628nm) and a InGaN LED (450nm). Among the main conclusions, it was verified that: 1) in some situations, a temperature independent electrical resistivity was observed and attributed to the possible formation of a two-dimensional electron gas (2DEG) at SnO2/GaAs interface; 2) crystalline size was calculated from X-ray diffraction data, being about 10 nm either for SnO2 films as GaAs films; 3) bandgap energy, evaluated from absorbance data yield a maximum value of about 3.6eV for tin dioxide and 1.6eV for GaAs films; 4) SEM images, obtained for GaAs thin films deposited by resistive evaporation and for the heterojuntion SnO2/GaAs, and optical microscopy, for sputtering deposited GaAs films and heterojunction samples, show that GaAs films present an heterogeneous surface, with particles of several distinct sizes. Besides, the adherence of SnO2 films on the GaAs layer is related to the used technique for deposition the base layer, being better in the case of resistive evaporation deposited GaAs. This was...
Mestre
Gaus, Caroline, and n/a. "Dioxins in the Marine Environment: Sources, Pathways and Fate of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Queensland, Australia." Griffith University. School of Public Health, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030624.144111.
Full textGaus, Caroline. "Dioxins in the Marine Environment: Sources, Pathways and Fate of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Queensland, Australia." Thesis, Griffith University, 2003. http://hdl.handle.net/10072/367537.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Public Health
Faculty of Health Sciences
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Cantrell, Susannah M. "Embryotoxicity of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9924870.
Full textLe, Van Anh. "SOURCES OF DIOXINS TO BALTIC AIR Volatilization and Resuspension As Potential Secondary Sources of Dioxins to Air." Thesis, Umeå universitet, Kemiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-56570.
Full textShoven, Heather A. "Monitoring Dioxin Levels in Maine Rivers with Semipermeable Membrane Devices." Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/ShovenHA2001.pdf.
Full textLees, Michael. "Characterising the mechanism of activation of the bHLH/PAS Dioxin Receptor /." Title page, summary and contents only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phl4873.pdf.
Full textKrivickas, Sara Jane. "Synthesis and transformation of 1,2-dioxines linked to aromatic systems : a thesis submitted in fulfilment of the requirements of the degree of Doctor of Philosophy /." Title page, contents and summary only, 2003. http://web4.library.adelaide.edu.au/theses/09PH/09phk9297.pdf.
Full text"September 2003" Addendum inserted inside backcover. Include bibliographical references (leaves 165-177).
Löthgren, Carl-Johan. "Mercury and dioxins in a MercOx-scrubber /." Örebro : Örebro universitetsbibliotek, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-825.
Full textAmoroso, Cathy Elizabeth. "The use of science in environmental policy decision making : a case study of dioxin standards in Georgia." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/29334.
Full textGaus, Caroline. "Dioxins in the marine environment sources, pathways, and fate of polychlorinated dibenzo-p-dioxins and dibenzofurans in Queensland, Australia /." Connect to this title online, 2002. http://bibpurl.oclc.org/web/9765.
Full textPloteau, Stéphane. "Etude du lien entre l’exposition aux polluants organiques persistants et l’endométriose." Thesis, Nantes, Ecole nationale vétérinaire, 2016. http://www.theses.fr/2016ONIR087F/document.
Full textEndometriosis is a gynecological disease for whichexposure to some environmental chemicals is evocatedamong the associated risk factors. Epidemiological studies are however globally non convergent and finally fairly conclusive. Their heterogeneity in terms of lesion localization and sub-phenotype, methodology, size and nature of the populations studied, as well as the limited number of monitored markers of exposure contribute to this situation. We realized a matched case-control study based on a biocollection of 113 patients including 68 patients suffering of deep endometriosis and 45 controls. We characterized the internal exposure levels of an extended range of around 78 persistent organic pollutants (including dioxins, polychlorobiphenyls, brominated flame retardants and organochlorine pesticides). Internal level exposures were measured in three biological compartments (omental fat, subcutaneous fat and serum). First, the distribution of these chemicals was characterized within these compartments. These extended exposure data from deep infiltrating endometriosis patients are the first ones available for France and give a new insight about the equilibrium of chemicals between storage and circulating compartments that should be further considered as a potential indicator permitting to establish a possible association between a chronic exposure to chemical hazards and human pathology. Afterwards, some of the targeted chemicals appeared significantly associated with deep endometriosis. A sub-stratification of our case population indicated a more significant relationship with the presence of endometrioma. Underlying mechanisms remain to be determined
Walsh, Peter J. J. "Dioxins and furans in the rural UK environment." Thesis, University of East Anglia, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365159.
Full textArehart, Eric. "Dioxin Alters Human Low-Density and Very Low-Density Lipoprotein Structure with Evidence for Specific Quenching of TRP-48 in Apolipoprotein C-H." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/ArehartES2003.pdf.
Full textRyu, Jae-Yong. "Dioxin formation on copper (II) chloride from chlorinated phenol, dibenzo-p-dioxin and dibenzofuran precursors." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/19050.
Full textDanielsson, Conny. "Trace analysis of dioxins and dioxin-like PCBs using comprehensive two-dimensional gas chromatography with electron capture detection." Doctoral thesis, Umeå universitet, Kemiska institutionen, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-963.
Full textDanielsson, Conny. "Trace analysis of dioxins and dioxin-like PCBs using comprehensive two-dimensional gas chromatography with electron capture detection /." Umeå : Department of Chemistry, Environmental Chemistry, Umeå University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-963.
Full textMaliji, Ghorban. "Immunotoxicity of 2,3,7,8-tetrachlorodibenzo-p-dioxin in the rat." Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319022.
Full textLiang, Ying, and 梁颖. "Association of diabetes mellitus and dioxins exposure : a systematic review." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/193792.
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Public Health
Master
Master of Public Health
Okumura, Yutaka. "Mass Balance and Bioaccumulation of Major Dioxins in Sendai Bay." Kyoto University, 2011. http://hdl.handle.net/2433/135409.
Full textBreve, Joelma Cristina de Souza [UNESP]. "Síntese e caracterização do compósito SnO2/TiO2 nanoestruturado." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/115966.
Full textO nanocompósito faz parte de um tipo de material o qual, apesar de ser obtido pela junção de dois ou mais materiais, não possui simplesmente a união das propriedades individuais de cada componente, mas possuui novas propriedades resultantes da interação entre as fases, justificada pela enorme interface entre estes materiais. Neste trabalho o método Poliol foi utilizado para preparar nanocompósitos SnO2/TiO2, formados de óxidos semicondutores de grande interesse no cenário atual da tecnologia sendo ambos de grande versatilidade para aplicações. Estes óxidos podem apresentar-se com uma mesma estrutura cristalina, a tetragonal do tipo rutila. Porém, apresentam diferentes estruturas eletrônicas e band gaps de energia, conferindo propriedades diferenciadas relacionadas à absorção de luz e à aplicação como sensores de gás. O compósito nanoestruturado e os óxidos sintetizados isoladamente foram caracterizados estruturalmente (DRX, FEG-MEV), por meio de análises térmicas (TG/DTA) e por espectroscopia de absorção de luz na região do ultravioleta, visível e infravermelho. As análises térmicas aliadas à difração de raios X revelaram que a síntese conjunta dos óxidos modifica o precipitado reduzindo a proporção de compostos orgânicos e intermediários e antecipando a formação das fases cristalinas do dióxido de titânio. Na análise por FEG-MEV observou-se que o compósito formado no aquecimento a 500ºC é constituído de nanoportículas de SnO2 suportados por placas maiores de TiO2 e este material, quando submetido à espectroscopia na região UV-Vis, apresentou maior absorção na região do ultravioleta. Foram realizados ensaios fotocatalíticos de descoloração do corante Rodamina B, os quais indicaram que o nanocompósitos possui atividade catalítica intermediária quando comparada aos óxidos isolados. Essa mesma amostra foi submetida a caracterizações elétricas que levaram à proposta de um modelo...
The nanocomposite is part of a class of materials which, despite being obtained by joining two or more materials, it has not simply the sum of the individual properties of resulting from the interaction between the phases, justified by the enormous interface between these materials. In the present work Polyol method was used to prepare SnO2/TiO2 nanocomposites, formed of semiconductor oxides of great interest in today's technology being of great versatility for applications. These oxides may present the same crystal structure, the tetragonal rutile type. However, they present different electronic structures and energy band gaps, giving different properties related to light absorption and application as gas sensors. The synthesized nanostructured composite as well as the isolate oxides were structurally characterized (XRD, FEG-SEM), using thermal analysis (TG/DTA), and light absorption spectroscopy within ultraviolet, visible and infrared regions. The combination of thermal analysis and X ray diffraction revealed that the simulataneous synthesis of two metals modified the precipitate, reducing the proportion of organic and intermediates compounds and anticipating the formation of crystalline phases of titanium oxides. By FEG-SEM analysis it was found that te composite treated at 500ºC consists of SnO2 nanoparticles suported by large plates of TiO2 and this material present highest uptake in the ultraviolet region. Testing photocatalytic discoloration of the dye Rhodamine B indicated that the nanocomposite has an intermediate catalytic activity when compared to the isolate oxides. The same sample was subjected to electrical characterization which led to a simplified model of electron transport in which it is assumed that the existing barrier between TiO2 particles is reduced due to the presence of SnO2 on the their surfaces
Breve, Joelma Cristina de Souza. "Síntese e caracterização do compósito SnO2/TiO2 nanoestruturado /." Bauru, 2014. http://hdl.handle.net/11449/115966.
Full textBanca: Luis Vicente de Andrade Scalvi
Banca: Luiz Henrique Dall'Antonia
O Programa em Ciência e Tecnologia de Materiais, PosMat, tem caráter institucional e integra as atividades de pesquisa em materiais de diversos campi
Resumo: O nanocompósito faz parte de um tipo de material o qual, apesar de ser obtido pela junção de dois ou mais materiais, não possui simplesmente a união das propriedades individuais de cada componente, mas possuui novas propriedades resultantes da interação entre as fases, justificada pela enorme interface entre estes materiais. Neste trabalho o método Poliol foi utilizado para preparar nanocompósitos SnO2/TiO2, formados de óxidos semicondutores de grande interesse no cenário atual da tecnologia sendo ambos de grande versatilidade para aplicações. Estes óxidos podem apresentar-se com uma mesma estrutura cristalina, a tetragonal do tipo rutila. Porém, apresentam diferentes estruturas eletrônicas e band gaps de energia, conferindo propriedades diferenciadas relacionadas à absorção de luz e à aplicação como sensores de gás. O compósito nanoestruturado e os óxidos sintetizados isoladamente foram caracterizados estruturalmente (DRX, FEG-MEV), por meio de análises térmicas (TG/DTA) e por espectroscopia de absorção de luz na região do ultravioleta, visível e infravermelho. As análises térmicas aliadas à difração de raios X revelaram que a síntese conjunta dos óxidos modifica o precipitado reduzindo a proporção de compostos orgânicos e intermediários e antecipando a formação das fases cristalinas do dióxido de titânio. Na análise por FEG-MEV observou-se que o compósito formado no aquecimento a 500ºC é constituído de nanoportículas de SnO2 suportados por placas maiores de TiO2 e este material, quando submetido à espectroscopia na região UV-Vis, apresentou maior absorção na região do ultravioleta. Foram realizados ensaios fotocatalíticos de descoloração do corante Rodamina B, os quais indicaram que o nanocompósitos possui atividade catalítica intermediária quando comparada aos óxidos isolados. Essa mesma amostra foi submetida a caracterizações elétricas que levaram à proposta de um modelo...
Abstract: The nanocomposite is part of a class of materials which, despite being obtained by joining two or more materials, it has not simply the sum of the individual properties of resulting from the interaction between the phases, justified by the enormous interface between these materials. In the present work Polyol method was used to prepare SnO2/TiO2 nanocomposites, formed of semiconductor oxides of great interest in today's technology being of great versatility for applications. These oxides may present the same crystal structure, the tetragonal rutile type. However, they present different electronic structures and energy band gaps, giving different properties related to light absorption and application as gas sensors. The synthesized nanostructured composite as well as the isolate oxides were structurally characterized (XRD, FEG-SEM), using thermal analysis (TG/DTA), and light absorption spectroscopy within ultraviolet, visible and infrared regions. The combination of thermal analysis and X ray diffraction revealed that the simulataneous synthesis of two metals modified the precipitate, reducing the proportion of organic and intermediates compounds and anticipating the formation of crystalline phases of titanium oxides. By FEG-SEM analysis it was found that te composite treated at 500ºC consists of SnO2 nanoparticles suported by large plates of TiO2 and this material present highest uptake in the ultraviolet region. Testing photocatalytic discoloration of the dye Rhodamine B indicated that the nanocomposite has an intermediate catalytic activity when compared to the isolate oxides. The same sample was subjected to electrical characterization which led to a simplified model of electron transport in which it is assumed that the existing barrier between TiO2 particles is reduced due to the presence of SnO2 on the their surfaces
Mestre
Agramunt, Garcia Sílvia. "Exposiciones ambientales durante el embarazo y eventos reproductivos." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/392661.
Full textINTRODUCTION: Prenatal exposure to various substances can influence reproductive outcomes such as birth weight, cranial perimetrum at birth or gestational age. Of special importance is the measure of anogenital distance in newborns, which would be related to the prenatal exposure to endocrinologic disruptors. In this PhD project we have analised some environmental substances and their association with reproductive outcomes. METHODS: The project has been developed in the multicentric cohort European study NewGeneris, with more than 1000 cord blood samples. We have analised the activity of dioxins (CALUX DR®), ethylene oxide (FIRE procedure) and acrylamide (FIRE procedure). RESULTS: We have observed an association between dioxins and a disminution on anogenital distance of male infants (n=237 newborns; -0.41mm, 95% CI -0.77; 0.66), dioxins and birth weight (n=247 newborns, β =-82g/10pg increase/TEQ-q lipid; 95% CI -264; 100), dioxins and head circumference at birth (n=205 newborns, β = -0,4g/10pg increase/TEQ-q lipid; 95% CI -7 to 7), and dioxins and gestational age (n=260 newborns, β = -0,8 weeks/10pg increase/TEQ-q lipid; 95% CI -1,4 to 0,2). Ethylene oxide has been associated to birth weight (n=1094, β = -37,73g/ 10pmol increase/g Hb; 95% CI -55,95 to -19,52), ethylene oxide and head circumference at birth (n=963, β = -0,11cm/10pmol increase/g Hb; 95% CI -0,18 to -0,04), ethylene oxide and gestational age (n=1094, β = -0,001 semanas/10pmol increase/g Hb; 95% CI -0,06 to 0,06). Acrylamide has been associated with birth weight (n=1101 newborns, β = -35g/10pmol increase/g Hb; 95% CI -51 to -19), acrylamide and head circumference at birth (n=1005 bebés, β = -0,06g/10pmol increase/g Hb; 95% CI -0,12 to 0,00), but not to gestational age. CONCLUSION: The PhD main conclusions that prenatal exposure to endocrine disruptors are associated to a decrease on anogenital distance in male newborns, as well as a decrease on birth weight, head circumference at birth and gestational age; even in a low level exposure setting. Our findings are consistent with the evidence found in experimental animals used for the WHO recommendations on exposure límits.
GUILBOT, Kelly. "Determination of dioxins in Cretaceous strata from the South of Sweden. : Can the environmental anthropogenic pollutant dioxin be of natural origin ?" Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-25916.
Full textBell, Jon Grahame. "Adsorption characteristics of models for dioxins on modified nanoporous activated carbons." Thesis, University of Newcastle Upon Tyne, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516433.
Full textAssefa, Anteneh. "Tracing and apportioning sources of dioxins using multivariate pattern recognition techniques." Doctoral thesis, Umeå universitet, Kemiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-102877.
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BalticPOPs
Wejheden, Carolina. "Studies on gender-specific disruption of bone tissue homeostasis by dioxins." Stockholm : Institutet of Environmental Medicine, Karolinska Institutet, 2010. http://diss.kib.ki.se/2010/978-91-7409-728-3/.
Full textBastian, Lawin. "Waste management options associated with greenhouse gas emissions reduction and dioxins control." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/174909.
Full textLohmann, Rainer. "Studies on the atmospheric sources, fate and behaviour of dioxins and furans." Thesis, Lancaster University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322093.
Full textChatkittikunwong, Watcharee. "Analytical synthesis and stability studies of halogenated dibenzo-p-dioxins and dibenzofurans." Thesis, University of East Anglia, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335138.
Full textShinkyo, Raku. "Structure-function analysis of mammalian cytochromes P450 involved in metabolism of dioxins." Kyoto University, 2006. http://hdl.handle.net/2433/144094.
Full text0048
新制・課程博士
博士(農学)
甲第12357号
農博第1538号
新制||農||923(附属図書館)
学位論文||H18||N4115(農学部図書室)
24193
UT51-2006-J349
京都大学大学院農学研究科食品生物科学専攻
(主査)教授 井上 國世, 教授 吉川 正明, 教授 村田 幸作
学位規則第4条第1項該当
Palamede, Audrey. "Stabilization of chlorinated dibenzo-p-dioxins, dibenzofurans and chlordecone in soils from three former industrial areas. : Leaching behavior of chlorinated dibenzo-p-dioxins, dibenzofurans and chlordecone from three soils." Thesis, Umeå universitet, Kemiska institutionen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-163550.
Full textPeña-Rey, Lorenzo Isabel. "Estudio bibliométrico de la producción científica sobre dioxinas a través de las bases de datos Pubmed e I.M.E. (1997-2003)." Doctoral thesis, Universidad de Murcia, 2004. http://hdl.handle.net/10803/10737.
Full textIntroduction Dioxins were declared as human carcinogenic substances in 1997. They accumulate in food, and they can genera te health problems. The main dioxins producers are salid waste incinerators. Objectives: to analyse the scientific production about dioxins in the last 7 years, describing the distribution in journals, geographic distribution and the publication languages. To analyse the productivity of authors, the pattern of signatories / authors, the work teams and the relationship with burden of disease. Methods Sources of date: PubMed, I.M.E. (Spanish Medical Index) and Science Citation Index-Expanded databases. Data were analysed with SPSS 11.0 and Reference Manager 10.0 programs. Solla Price, Bradford and Lotka modeis were applied; the productivity index was computed; the Impact Factor and the Immediacy Index of journals were studied. A quality control of papers was done, taking into account the Uniform Requirements for Manuscript Submitted to Biomedical Journals of the International Commitee of Medical Journal Editors. Components of Invisible Colleges were assessed. Scientific production was linked to burden of disease produced by dioxins. Results 3522 articles were found. The number of articles published each year is fitted to Solla Price model, with a correlation coefficient clase to 1. The Bradford nucleus is the journal Chemosphere, with 446 articles. One author published 42 articles. The equation is fitted to Lotka's one, with an exponential change of -0.5. The most publisher journals have algo higher Impact Factor. No differences of quality of articles were founded among journals according to the number of published papers. Neuro-psychiatric and cardiovascular disorders and tumors were founded as the three groups that produce majar burden of disease in countries with higher information production on dioxins. Conclusions It has been shown the scientific literature dispersion. Majority of papers belong to journals edited in the origin country of database. Research groups of authors have be en found. Specialisation of some journals of Nucleus and 1st Bradford Zone has been shown. Burden of disease of some countries is not explained by contamination.
Gripp, William Gomes. "Aspectos técnicos e ambientais da incineração de resíduos sólidos urbanos: considerações sobre a proposta para São Paulo." Universidade de São Paulo, 1998. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-10062016-122416/.
Full textThe incineration technique on the management of municipal solid waste is intensely used in several countries. In Brazil, besides an occasional utilization on medical services waste, there is a proposal for the implantation of two large facilities for the thermal treatment of domestic solid waste in São Paulo city. Through a review on this theme, we present here the main technical and environmental parameters on this technology, including the combustion and the pollutant generation mechanisms, types of equipment, management and disposition of fly and bottom ashes and the main control and reduction methods of atmospheric pollution like acid gases, particulates and heavy metals. The state of the art on the present technical-scientific knowledge on dioxins and furans connected to the incineration of urban solid waste is presented. On this theoretical basis and on the analysis of the environmental impact assessment and environmental impact report on the Santo Amaro and Sapopemba facilities, we conclude that the incineration systems, as in the proposal, do not present the technologic level necessary to obey the operation and pollutant emission rules on the countries where this activities are controlled.
Akki, Umesh. "Gas phase formation pathways and mechanisms of polychlorinated dibenzo-p-dioxins and dibenzofurans." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/23157.
Full textDo, Lan. "New tools for sample preparation and instrumental analysis of dioxins in environmental samples." Doctoral thesis, Umeå universitet, Kemiska institutionen, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-70218.
Full textEichbaum, Kathrin Verfasser], Henner [Akademischer Betreuer] [Hollert, and Andreas [Akademischer Betreuer] Schäffer. "In vitro bioassay tools for the toxicological evaluation of dioxins and dioxin-like compounds in sediments and biota / Kathrin Eichbaum ; Henner Hollert, Andreas Schäffer." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1130326551/34.
Full textEichbaum, Kathrin [Verfasser], Henner [Akademischer Betreuer] Hollert, and Andreas [Akademischer Betreuer] Schäffer. "In vitro bioassay tools for the toxicological evaluation of dioxins and dioxin-like compounds in sediments and biota / Kathrin Eichbaum ; Henner Hollert, Andreas Schäffer." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://nbn-resolving.de/urn:nbn:de:hbz:82-rwth-2016-009703.
Full textTsang, Jennifer Arr, and 曾昭雅. "Dioxin contamination in soil: remediation technology and environmental management." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31255644.
Full textPICCINELLI, ELSA. "Environmental impact of industrial plants combustion processes: kinetic and formation/destruction mechanisms of PolichlorinatedDibenzo-p-Dioxins and PolichlorinatedDibenzoFurans." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2009. http://hdl.handle.net/10281/10060.
Full textSaeed, Anam. "Studies on the Decomposition of Selected Brominated Flame Retardants (BFRs) and Formation of Polybrominated Dibenzo-p-dioxins and Dibenzofurans (PBDD/Fs) and Mixed Halogenated Dibenzo-p-dioxins and Dibenzofurans (PXDD/Fs)." Thesis, Saeed, Anam (2016) Studies on the Decomposition of Selected Brominated Flame Retardants (BFRs) and Formation of Polybrominated Dibenzo-p-dioxins and Dibenzofurans (PBDD/Fs) and Mixed Halogenated Dibenzo-p-dioxins and Dibenzofurans (PXDD/Fs). PhD thesis, Murdoch University, 2016. https://researchrepository.murdoch.edu.au/id/eprint/35843/.
Full textRivera, Austrui Joan. "Estudi de les emissions de PCDD/F i altres contaminants orgànics persistents a l'atmosfera mitjançant l'ús de captadors en continu." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/400876.
Full textThe release of Persistent Organic Pollutants (POP) to air from combustion processes is a matter of concern due to their toxic effect on human health and environment. European legislation obliges industrial plants to undertake periodic controls of their emission releases to air, with the aim to reduce them. In Europe, the determination of the mass concentrarion of dioxins and furans (PCDD/Fs) and polychlorinated biphenyls (PCBs) is regulated by Standard EN1948. This standard is based on the GC/HRMS analysis of a sample issued from a manual sampling train and taken in a range of time from 6 to 8 hours. New automatic sampling devices are available nowadays that allow sampling times up to several months. By extending the sampling coverage to the whole operation period, better results are achieved for the assessment of total pollutants emission release. The present thesis work includes several studies for the determination of the mass concentration of PCDD/Fs, PCBs and other POPs in stack gas emissions by means of long-term sampling systems, in different types of industrial plants. For this purpose a preliminary study of the applicability of long-term sampling systems has been necessary, as well as the modification of the analysis scheme applied to short-term samples, in order to adapt it to the characteristics of new samples. In summary, the methodology used for the analysis of PCDD/Fs and dl-PCBs from short-term samples was adapted to the analysis on these more concentrated samples issued from long-term sampling systems. The uncertainty of the method was assessed as well as the validation, with special emphasis on these points where the new methodology differs from the conventional one. On the other hand, the extracts determined by GC/HRMS were also analysed by means of a gas chromatograph coupled to a triple quadrupole with atmospheric pressure ionization (GC-APCI-MS/MS), for the evaluation of this novel technique performance in emission samples analysis. The proposed methodology was used for the determination of POPs emission in different type of industrial activities. From waste incineration field, with a two year project for the determination of POPs emissions in a hazardous waste plant incinerator, to cement plants with and without the use of alternative fuels. The studies contributed to the establishment of new emission factors for these plants and the characterization of the ‘footprint’ of their particular emissions. Moreover, one of the cement plants study included the simultaneous determination with dioxin-like compounds of polybrominated dioxins and furans (PBDD/Fs) and poly aromatic hydrocarbons (PAHs). The results of the studies in cement plants proved that, even if an influence of the ratio usage of alternative fuels results in some cases in changes on the emission profiles, co-incineration is a practice that is not necessarily related to higher persistent organic pollutants emission levels.
Hu, Keke. "Structure-activity relationships for the metabolism of polychlorinated dibenzo-p-dioxins and related compounds." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ35799.pdf.
Full textJAMSHAID, ASHIQ MUHAMMAD. "Influence of alternative fuels on the formation of dioxins in a cement production plant." Thesis, Umeå universitet, Kemiska institutionen, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89026.
Full textCespedes, Miguel Angel. "Characterisation of the effects of dioxins on Ahr through its homologue in Drosophila spineless." Thesis, University of Sussex, 2010. http://sro.sussex.ac.uk/id/eprint/2359/.
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