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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.
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Showing 221 to 230 of 354 (0.073 seconds)Spelling suggestions: "subject:"lil pollution"" "subject:"lil collution""
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The detection of oil in water by near infrared pulsed photoacousticspectroscopyHodgson, Peter January 1994 (has links)
An experimentally based study to investigate near infrared laser photoacoustic spectroscopy as a technique to measure oil pollution is described. Photoacoustic spectroscopy is shown to be well suited to the application of monitoring oil in water in a pipeline. The role of the physical parameters important to photoacoustic generation is shown to lead to an effective amplification of differences in the optical absorption coefficients for many hydrocarbons and alcohols in water. This amplification is typically an order of magnitude and persists at low concentrations of arialyte, such that a Nd:YAG source (2 mJ pulses) yields a 7.2 % increase in the photoacoustic signal magnitude for a 500 mg/I oil in water sample compared to distilled water, corresponding to a detection limit of 4 mg/I. Using a 904 nm diode laser as a source for photoacoustic generation, a detection limit of 400 mg/1 of oil is demonstrated. In addition there is found to be no discernible effect on the magnitude of the photoacoustic signal caused by the presence of optically scattering particles. The design and development of a photoacoustic instrument to measure oil in water is described, and the performance of such an instrument is compared to that of the competing technology.
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| 222 |
An investigation into the effect on total toxicity predictions of interactions between components of a typical North Sea produced waterHenderson, Shirley B. January 1999 (has links)
No description available.
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| 223 |
The value of acetylcholinesterase activity in Daphnia as a biomarker of environmental contaminationPrintes, Liane Biehl January 2003 (has links)
No description available.
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| 224 |
Pollutant formation and interaction in the combustion of heavy liquid fuelsMolero de Blas, Luis Javier January 1998 (has links)
No description available.
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| 225 |
Algal and bacterial dynamics in waste stabilization ponds and wastewater storage and treatment reservoirsAthayde, Salena Tatiana Silva January 2001 (has links)
No description available.
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| 226 |
Nitrate-N levels in British streams and rivers : a countrywide perspectiveBetton, Catherine January 1990 (has links)
No description available.
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| 227 |
The use of heavy metals in stream sediments for assessing the environmental impact of miningMerefield, John Rainbow January 1993 (has links)
No description available.
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| 228 |
Eutrophication and its control by biomanipulationTuzun, Ilhami January 1993 (has links)
No description available.
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| 229 |
Investigation of heavy metal removal from motorway stormwater using inorganic ion exchangePitcher, Sarah January 2002 (has links)
No description available.
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| 230 |
Discolouration and pipe-water interface studies : an examination of corrosion, deposition and water quality in potable water distribution pipelinesPatrick, M. J. L. January 1989 (has links)
No description available.
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