Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 135 for “"Environmental chemistry"”.
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Applications of fluorescence spectroscopy to environmental chemistry
The work presented in this thesis consists of three parts. The first is a photophysical study of the mechanism of fluorescence quenching by stable nitroxyl radicals, which are becoming an important analytical tool for the study of reactive transients in surface waters (1, 2). In part two, quenching …
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Teachers' Resource for Materials and Environmental Chemistry
In many secondary education chemistry classrooms, teachers have a difficult time introducing chemistry topics in a way that will be interesting to the high school student. The development of a materials and environmental chemistry teacher's manual will help teachers introduce a variety of selected …
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Applications of fluorescence spectroscopy to environmental chemistry
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 1992
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Application of the peat archive as tool in environmental chemistry
… profiles can be used to study the chronology of environmental contamination with harmful pollutants such as polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and per- and polyfluorinated alkylated substances (PFAS). These mostly carcinogenic organic compounds are …
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The development of integrated chemistry-based experiments implications for the teaching of environmental chemistry in the Vietnamese context
A survey of environmental chemistry laboratory experiments in the Journal of Chemical Education (ACS) and Education in Chemistry (RCS) has been carried out from 1969 to the present. The experiments have been categorized as being related to the areas of either air, water or soil. Over the same …
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A Comparison of Metals in Several Ahermatypic Corals and Surficial Sediments: Mobile Pinnacles and Hoffa Reef, Northcentral Gulf of Mexico
… invertebrates are representative of surrounding environmental chemistry. Aluminum, Ba Ca, Cd, Cr, Cu, Fe, Mg, Mn, Ni, Pb, Sr, and Zn were measured in carbonate and terrigenous phases of the $<$63 um fraction of sediment samples from two locations in the northcentral Gulf of Mexico. Enrichment …
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Halogenated 1'-methyl-1,2'-bipyrroles (MBPs) in the Norwestern Atlantic
… to add to current knowledge of biosynthetic chemistry. The objectives of this dissertation were to further clarify the environmental distribution of MBPs, to examine whether MBPs biomagnify, and to investigate possible origins of these compounds through their stable nitrogen isotopic …
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Halogenated 1'-methyl-1,2'-bipyrroles (MBPs) in the northwestern Atlantic
… to add to current knowledge of biosynthetic chemistry. The objectives of this dissertation were to further clarify the environmental distribution of MBPs, to examine whether MBPs biomagnify, and to investigate possible origins of these compounds through their stable nitrogen isotopic …
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Detektion und Überexpression von Genen FADH2- abhängiger Halogenasen aus Actinoplanes sp. ATCC 33002
… In: G. W. Gribble (Ed.), The Handbook of Environmental Chemistry, Vol. 3, part P. Natural production of organohalogen compounds. Springer-Verlag Berlin, Heidelberg, (2003) 171
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Sintesi e caratterizzazione di nanocompositi aerogel altamente porosi per applicazioni catalitiche
… performed in collaboration with the Applied and Environmental Chemistry Department of Szeged University (Hungary), the Chemistry Department of Rome University “La Sapienza” and the Chemical and Earth Science Department of Cagliari University.
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Method Development for the Application of Vibrational Spectroscopy to Complex Organic-Inorganic Materials in Astrobiology. A Systematic Development of Raman Spectroscopy and Related Analytical Methods to the Structural Chemistry at Organic (Biological) and Inorganic (Mineralogical) Interfaces of Material Assemblies Relevant to Astrobiology and Inter-Planetary Science.
… but may also be applied to terrestrial environmental chemistry.
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Determining Interfacial Adhesion Performance and Reliability for Microelectronics Applications Using a Wedge Test Method
… resistance of an interface under different environmental conditions is very important. This study investigates the effects of temperature, solution chemistry and environmental preconditioning, in several solutions on the durability of silicon/epoxy and glass/epoxy systems. A series of …
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The impact of metals and other stress factors on microbial ammonia oxidation physiology and isotope effects
… and relevant stress factors that regulate environmental rates. Ammonia oxidizing organisms (AOO) require the trace metal micronutrients copper (Cu) and iron (Fe) for growth and metabolic catalysis. Ammonia oxidation is directly affected by pH in regulating the relative availability of …
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Síntesis, caracterización, propiedades y aplicaciones de nuevas poliamidas aromáticas con subestructuras benzoéter corona y benzopodandos en la cadena lateral
… successful applications in the field of environmental chemistry: the decontamination and elimination of poisoning cations, the separation and modification of cation mixtures, and the development of fixed-site carrier membranes for selective transport or manufacture of cation sensitive …
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Procedimentos operacionais padrão dos equipamentos de rotina localizados no Laboratório de Estudos em Química Ambiental (leqa/dq).
… routine equipment located in the Laboratory of Environmental Chemistry (LEQA) Department of Chemistry (DQ), Federal University of Paraíba (UFPB). Standard operating procedures were developed from LEQA concisely, with writing simple and brief. Initially, it was neatly containing a detailed …
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An investigation of the reaction kinetics of photocatalytic wastewater treatment using suspended titanium dioxide catalyst
… - one of the most oxidizing agents known in environmental chemistry - which easily attack all types of organic pollutants found in wastewater. However, while this process seems very promising, there are no standard design parameters to accurately model and predict the behavior of a …
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Trace metal applications in atmospheric and watershed dynamics: Case studies of mercury deposition in New England and bedrock groundwater-surface water mixing
… presented in this dissertation focus on the environmental chemistry of two trace metals, mercury (Hg) and strontium (Sr). Both are naturally occurring and exist in the environment at trace levels.</p><p>Chapters II-IV of this dissertation focus on understanding the atmospheric chemistry of Hg …
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MEASUREMENTS OF ATMOSPHERIC RADICALS IN AMBIENT AND INDOOR ENVIRONMENTS: OUTDOOR-INDOOR RELATIONSHIPS, INDOOR FORMATION MECHANISMS, AND INSTRUMENTAL ANALYSIS
… atmospheric oxidation, critically altering the chemistry of the air we breathe. Radical reactions initiate oxidation of volatile organic compounds (VOCs), which in the presence of nitrogen oxides (NOx) can form ozone and secondary organic aerosols (SOA)—air pollutants affecting human health and …
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Automatic Generation of Chemical Kinetic Models including Macromolecules in Multiphase Systems
… unraveling the complexities of industrial and environmental chemistry systems. Many important industrial and environmental chemistries involve thousands of species and hundreds of thousands of complex pathways, which are difficult to resolve manually. To address this challenge, automatic …
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Age, movements, and feeding ecology of northwest Atlantic white sharks estimated from ecogeochemical profiles in vertebrae
… and understudied marine predators. Ecogeochemistry, which takes advantage of natural variations in chemical signatures recorded in body tissues, can help determine lifetime movement, age, and ontogenetic diet history in difficult to study species. Shark vertebrae are constructed of …
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