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 25 for “"DMSP"”.
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VIrginia Urban Dynamics Study Using DMSP/OLS Nighttime Imagery
… Satellites Program/Operational Linescan System (DMSP/OLS) to delineate urban boundaries and tracked three key urban changes: land cover change, population growth and GDP growth within Virginia. NTL data from different years were inter-calibrated to be comparable by using linear regression model …
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Genetic analysis of DMSP metabolism in the marine Roseobacter clade
… catabolism of dimethylsulfoniopropionate (DMSP), an abundant anti-stress compound made by marine phytoplankton. Members of the Roseobacter clade of marine α-proteobacteria may catabolise DMSP by two different routes; demethylation to form methylmercaptopropionate (MMPA), and cleavage by …
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Aladdin's Magic Lamp: Developing Methods for Calibration and Geolocation Accuracy Assessment of the DMSP OLS
… the Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS) has a unique capability to observe nocturnal light emissions from sources including cities, wild fires, and gas flares. Data from the DMSP OLS is used in a wide range of studies including mapping urban areas, …
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Marine microbial production of dimethylsulfide from dissolved dimethylsulfoniopropionate
… sulfonium compound dimethylsulfoniopropionate (DMSP), a common osmoticum in certain classes of marine algae. While some algae can cleave DMSP intracellularly to form DMS, correlation of DMS concentrations with indicators of algal productivity on a local scale is poor. This thesis focuses on an …
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On the molecular diversity of dimethylsulphoniopropionate catabolism by marine bacteria
Dimethylsulphoniopropionate (DMSP) is the most abundant organic sulphur molecule in the oceans. Its breakdown by marine organisms is important for the global cycling of sulphur, and as a nutrient source for microbial life. In recent years, the molecular basis of DMSP catabolism by marine bacteria …
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The production of biogenic gases in the marine environment
… associated with dimethylsulphoniopropionate (DMSP) and dimethylsulfoxide (DMSO) although comparatively little is known about the dynamics of DMSO in the marine environment. This study analysed the production of DMSO by a range of marine phytoplankton species in comparison with DMSP. Algal …
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Variabilité des concentrations cellulaires phytoplanctoniques de diméthylsulfoniopropionate (DMSP) et de diméthylsulfoxyde (DMSO) en Baie Sud de la Mer du Nord
… is a known high dimethylsulfoniopropionate (DMSP) producer whose bloom accounts for 95% of spring phytoplankton biomass. An increase in DMS(P) and its oxidation product dimethylsulfoxide (DMSO) cellular contents have been frequently observed in cellular stress conditions. To test this, we …
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Understanding the ocean carbon and sulfur cycles in the context of a variable ocean : a study of anthropogenic carbon storage and dimethylsulfide production in the Atlantic Ocean
… variability in dimethylsulfoniopropionate (DMSP) degradation and dimethylsulfide (DMS) production in the oligotrophic North Atlantic are investigated using potential enzyme activity and gene expression and abundance data. Vertical mixing and UV radiative stress appear to be the dominant …
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Understanding the ocean carbon and sulfur cycles in the context of a variable ocean : a study of anthropogenic carbon storage and dimethylsulfide production in the Atlantic Ocean
… variability in dimethylsulfoniopropionate (DMSP) degradation and dimethylsulfide (DMS) production in the oligotrophic North Atlantic are investigated using potential enzyme activity and gene expression and abundance data. Vertical mixing and UV radiative stress appear to be the dominant …
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Linking microbial metabolism and organic matter cycling through metabolite distributions in the ocean
… the algal metabolite dimethylsulfoniopropionate (DMSP) was analyzed using targeted and untargeted metabolomics. The manner in which DMSP causes R. pomeroyi to modify its biochemical pathways suggests anticipation by R. pomeroyi of phytoplankton-derived nutrients and higher microbial density. …
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The effects of elevated CO2 and ocean acidification on the production of marine biogenic trace gases
… coastal study which showed a 60% DMS, 30% DMSP and 40% iodocarbon reduction in high pCO2 mesocosms, and in the Baltic Sea, known for its low-salinity, cyanobacterial dominated community, where DMS concentrations showed an 80% reduction under high pCO2 but halocarbon concentrations were …
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Linking microbial metabolism and organic matter cycling through metabolite distributions in the ocean
… the algal metabolite dimethylsulfoniopropionate (DMSP) was analyzed using targeted and untargeted metabolomics. The manner in which DMSP causes R. pomeroyi to modify its biochemical pathways suggests anticipation by R. pomeroyi of phytoplankton-derived nutrients and higher microbial density. …
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Using Multi-Source Data to Assess the Dynamics of Socioeconomic Development in Africa
… Satellite Program Operational Line System (DMSP-OLS) nighttime lights (NTL) data. However, the DMSP-OLS NTL data and the associated processing methods have limited their reliability and applicability for systematic measuring and mapping of socioeconomic development. This research utilizes …
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The Non-Linear Electrodynamic Coupling Between the Solar Wind, Magnetosphere and Ionosphere
… reverse convection potential. It is found using DMSP particle precipitation data that the reverse convection cells in the winter circulate at least partially on closed field lines. Finally, SuperDARN and DMSP data are merged to provide polar cap potential measurements for a statistical study of …
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Development of GHG-Mitigation Oriented Models for the Planning of Integrated Energy-Environment Systems (IEES) Under Uncertainties
… multi-stage stochastic programming model (DMSP-IEES), (e) a fuzzy dual-interval multi-stage stochastic programming model (FDMSP-IEES), (f) a joint-probabilistic left-hand-side chance-constrained programming model (ILJCP-IEES), (g) an interval joint-probabilistic two-side chance-constrained …
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Empirical Study of Subauroral Polarization Streams (SAPS) through Decades of Satellite Observations
… by the Defense Meteorological Satellite Program (DMSP) and Dynamics Explorer 2 (DE 2) satellites. We have used these measurements to develop an empirical model of subauroral electric fields which is oriented relative to particle precipitation boundaries instead of by geomagnetic coordinates. This …
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Radio and optical studies of natural and artificially stimulated geospace plasmas
… ground-based instruments are compared with the DMSP satellite data recordings during geomagnetic conjunctions. Results of this investigation indicate there is good agreement between the satellite Maxwellian spectra and the characteristic energies derived from the ground-based measurements when …
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