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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
231

Modulation of aryl hydrocarbon receptor (AhR) activity by flavonoids.

January 2011 (has links)
Poon, Ching Ho. / "October 2010." / Thesis (M.Phil.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references (leaves 95-102). / Abstracts in English and Chinese. / ACKNOWLEDGEMENTS --- p.3 / TABLE OF CONTENTS --- p.4 / ABSTRACT --- p.6 / 摘要 --- p.8 / ABBREVIATIONS --- p.10 / LIST OF FIGURES --- p.11 / Chapter CHAPTER 1 --- GENERAL INTRODUCTION --- p.14 / Chapter CHAPTER 2 --- MATERIALS AND METHODS --- p.26 / Chemicals and materials --- p.26 / Mammalian cell culture --- p.27 / Reporter gene assay --- p.28 / Semi-quantitative real-time PCR --- p.30 / RNA degradation assay --- p.31 / Western Blotting --- p.32 / Electrophoretic mobility shift assay (EMSA) --- p.34 / EROD assay in intact cells --- p.35 / Statistical Analysis --- p.35 / Chapter CHAPTER 3 --- Two citrus bioflavonoids suppress DMBA-induced CYP1 gene expression and activity via antagonizing AhR transactivation activity --- p.36 / Chapter CHAPTER 4 --- Modulation of AhR-mediated CYP1 enzymes transcription by licorice flavonoids isoliquiritigenin --- p.60 / Chapter CHAPTER 5 --- Protein kinase signaling pathways are not involved in the modulation of AhR transactivation activity by flavonoids --- p.81 / Chapter CHAPTER 6 --- SUMMARY --- p.94 / BIBLIOGRAPHY --- p.97
232

Culture-dependent and -independent microbial analyses of petroleum hydrocarbon contaminated Arctic soil in a mesocosm system

Dyen, Michael Reisen. January 1900 (has links)
Thesis (M.Sc.). / Written for the Dept. of Natural Resource Sciences. Title from title page of PDF (viewed 2008/07/30). Includes bibliographical references.
233

Large scale synthesis and derivatization of corannulene the smallest buckybowl /

Bachawala, Praveen, January 2006 (has links)
Thesis (M.S.) -- Mississippi State University. Department of Chemistry. / Title from title screen. Includes bibliographical references.
234

The potential role of bacteria as a bioremediation technique at the Sydney Coke Ovens site /

Bailey, Brenda Lee. January 1900 (has links)
Thesis (M.Sc.) - Carleton University, 2007. / Includes bibliographical references (p. 48-50). Also available in electronic format on the Internet.
235

Beyond the 16 EPA priority pollutant PAHs : environmental characterizations of oxygenated PAHs and dibenzopyrene isomers /

Layshock, Julie. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2010. / Printout. Includes bibliographical references (leaves 104-108). Also available on the World Wide Web.
236

Avaliação do gradiente de contaminação por elementos metálicos e hidrocarbonetos nos sedimentos desde a zona costeira do sistema estuarino de Santos e São Vicente até o Parque Estadual Marinho da Laje de Santos / Evaluation of metals and hydrocarbons gradiente on the sediments from Santos and São Vicente estuary system to Marine State Park of Laje de Santos

GOBBATO, GUSTAVO M. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:33:05Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:06:06Z (GMT). No. of bitstreams: 0 / Dissertação (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
237

Avaliação do gradiente de contaminação por elementos metálicos e hidrocarbonetos nos sedimentos desde a zona costeira do sistema estuarino de Santos e São Vicente até o Parque Estadual Marinho da Laje de Santos / Evaluation of metals and hydrocarbons gradiente on the sediments from Santos and São Vicente estuary system to Marine State Park of Laje de Santos

GOBBATO, GUSTAVO M. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:33:05Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:06:06Z (GMT). No. of bitstreams: 0 / O Parque Estadual Marinho da Laje de Santos (PEMLS) é considerado um dos melhores pontos de mergulho do Brasil além de apresentar grande importância ecológica para a região. Está localizado a 40 km de uma das áreas costeiras mais contaminada do Brasil, o Sistema Estuarino de Santos e São Vicente (SESSV) que apresenta como principais fontes de contaminação as atividades industriais e o maior porto da América Latina. O presente estudo teve como objetivo avaliar o gradiente de contaminação por metais e hidrocarbonetos alifáticos (AH) e policíclicos aromáticos (HPA) nos sedimentos desde o SESSV até o PEMLS para identificar o grau de contaminação e as possíveis fontes dos contaminantes. Amostras de sedimento superficial foram coletadas em pontos distribuídos por todo SESSV, na baia de Santos, na zona marinha adjacente e no PEMLS. Os resultados foram comparados aos valores da qualidade dos sedimentos (VGQS) propostos na literatura para avaliar o grau de contaminação nos sedimentos. De acordo com os resultados, a contaminação por metais e hidrocarbonetos nos sedimentos do SESSV é elevada, acima dos limites estabelecidos nos VGQS, principalmente na porção interna do estuário próximo as atividades industriais. As principais fontes de emissão de contaminantes para o SESSV são os efluentes industriais e a queima de combustíveis fósseis. A zona marinha adjacente, onde está localizada a área de descarte do material dragado, apresentou, depois do estuário, as maiores concentrações de metais e hidrocarbonetos. Essas concentrações foram mais elevadas que as encontradas na baia de Santos. No PEMLS foram registrados indícios de contaminação por Cr, Hg, Ni, Pb e Zn, os quais tem origem de fontes localizadas na costa, que exportam os contaminantes até a região do PEMLS através das correntes marinhas e ainda fontes locais como barcos de operadoras de mergulho e o tráfego de navios. O Ni apresentou concentrações que estiveram acima dos limites do VGQS. Os hidrocarbonetos não apresentaram concentrações elevadas nos sedimentos do PEMLS. Sendo assim, é importante que seja realizado um controle de poluição no SESSV a fim de remediar as áreas mais contaminadas e um monitoramento continuo do gradiente de contaminação desde a zona de costa até o PEMLS para garantir a preservação desse ecossistema que já apresenta indícios de contaminação. A criação de um plano de manejo específico para o PEMLS auxiliaria na proteção dessa Unidade de Conservação. / Dissertação (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
238

Preparation of flat dendrimers and polycyclic aromatic hydrocarbons connected via 1,3,5-triethynylbenzene core.

Jung, Jiyoung 12 1900 (has links)
Flat dendrimers, consisting of a hexavalent aromatic core and rigid ethynyl units locked in place by ether connections were developed based upon the divergent synthetic method. Alternating functional groups were adopted on each site of the hexa-substituted benzene, in order to avoid undesired cyclization pathways. The flat structures of conjugated dendrimers would allow investigation on the discotic liquid crystal properties. In addition, these ethylnyl dendrimers are expected to show directed energy and electron transfer with a highly conjugated system, and thus are effective in the preparation of photoreactive materials such as electronic sensors or light harvesting materials. Conjugated polycyclic aromatic hydrocarbons, consisting of naphthalene, anthracene, pyrene, and phenanthrene groups connected via 1,3,5-triethynylbenzene cores, were synthesized. These molecules exhibited luminescence properties and the π-complexation with a mercury trifunctional lewis acid are expected to enhance the phosphorescence in the presence of the heavy metal due to the spin-orbit coupling. Besides, owing to the presence of heavy metal atom in the Au (I) complexes linked by s-bonded triethynyltriphenylene luminophore, the phosphorescence occurs from a metal-centered emission. The conjugated organic luminophores have been developed to produce excellent quantum efficiencies, brightness, and long lifetimes.
239

Diffusion of Hydrocarbons Through Rubber Membranes

Long, Loren M. 08 1900 (has links)
This thesis explores the seperation of isomeric paraffins in organic chemistry and how the resulting mixture of hydrocarbons might be examined.
240

Study of engine wall layer hydrocarbons with a fast response FID

Peckham, Mark S. January 1993 (has links)
No description available.

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