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 189 for “"organic material"”.
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Influence of Soluble Surface-Active Organic Material on Droplet Activation
Both theoretical and experimental approaches also show that despite the a depression, S$\sb{\rm c}$ of a particle that contains SDS is always higher than that of a pure NaCl particle with the same dry size. The degree of this deviation increases with increasing SDS% in the mixtures, indicating an …
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Organic material-based, next-generation nanozyme for effective agricultural biomolecule sensing
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Combined coagulation and membrane microfiltration for removal of natural organic material (nom)
The removal of natural organic matter (NOM) is a key requirement of many processes in potable water treatment. Conventionally, removal of NOM and colloidal material has been achieved by coagulation with inorganic coagulants followed by either direct rapid gravity filtration alone or clarification …
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The characterization of dissolved organic material in natural waters and the phase-change behavior of organic matter during chemical coagulation
Research efforts pertaining to natural organic material (NOM) have focused primarily on the dissolved portion of NOM since it is the most prevalent fraction. Numerous procedures have been developed to separate dissolved organic material (DOM) into fractions but methods were not fully refined in the …
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Dissolved organic material in groundwater and application of fluorescence spectroscopy coupled with EEM PARAFAC models as a means of site characterisation
The role of dissolved organic matter (DOM) in aquatic systems has been associated with numerous physiochemical processes including carbon sink, contamination indicator and important component in natural geochemical and microbial processes. However, to date research into the behaviour of DOM within …
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Interactions between rivers and coastal margins in the Alaskan Arctic
… only receive riverine input of terrestrial organic material from late spring through late summer. This work examines the delivery, transformation, and distribution of organic material within Stefansson Sound, an Alaskan river-fed estuary, at the beginning and end of this period. We found …
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Designing a Simulator for an Electrically-Pumped Organic Laser Diode
<p>Organic semiconductors provide an alternative set of basis materials to fabricate electronic devices like PN Junctions, LEDs, and FETs. These materials have several benefits over traditional inorganic semiconductors including their mechanical flexibility, reliance on renewable resources, and …
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Vector offset operators for deformable organic objects.
Many natural materials and most of living tissues exhibit complex deformable behaviours that may be characteriseda s organic. In computer animation, deformable organic material behaviour is needed for the development of characters and scenes based on living creatures and natural phenomena. This …
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Organic chemistry and mineral interactions in the solar system
… was to develop methods to detect meteoritic organic compounds in situ, and to detelmine whether any associations exist between specific classes of compound and co-located minerals, thus indicating a possible common origin. Carbonaceous chondrites, (which comprise a small proportion of …
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Role of Water in the Formation, Transformation and Fate of Secondary Organic Aerosol
… formation, transformation and fate of secondary organic aerosol (SOA) remains not fully characterized. In order to address this knowledge gap, this thesis explores the role of water in SOA formation, chemical aging and fate as cloud condensation nuclei. The formation of SOA from the …
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Ammonia emissions and pathogen inactivation during controlled composting of pig manure
… pH and increasing the initial C:N ratio of the organic material. Experimentally, lowering the initial pH significantly reduced ammonia emissions. The effect of the initial C:N ratio on ammonia emissions was not significant because of variations in the pig manure. Pathogen markers were sometimes …
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Temporal and Spatial Patterns in Optical Properties of Colored Dissolved Organic Matter on Florida’s Gulf Coast: Shelf to Stream to Aquifer
Characterization of Colored Dissolved Organic Matter (CDOM) in surface and ground waters in South Florida was conducted using fluorescence and absorption spectroscopy. Waters of the West Florida Shelf are heavily influenced by many river systems on Florida's Gulf Coast that, to the first order …
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The status and seasonal dynamics of fish and benthic invertebrate populations in relation to organic and inorganic material inputs and surface mining impacts in three Virginia headwater streams
… the mined areas and from abandoned haul roads. Inorganic sediment in the mining-impacted streams covered the natural rubble substrate, smoothing the bottom, filling in pools, and impacting the processing of allochthonous organic material, the principal energy source. Fine-particle organic material …
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Factors Influencing the Distribution, Growth and Infectivity of Casuarina-Infective Frankia
… added to the seedling growth substrate to bind organic material significantly inhibited nodulation of C. cunninghamiana by a Frankia isolate, suggesting the host may release compounds necessary to the nodulation process. In a final study, the infectivity of soils inoculated with Frankia isolate …
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Field deployable dynamic lighting system for turbid water imaging
… caused by ocean chemistry and entrained organic material. By reducing the size of the scatter interaction volume, one can immediately improve both the focus (forward scatter limited) and contrast (backscatter limited) of underwater images. This thesis describes a relatively simple, …
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Elastomeric contact printing for sub-micron patterning of organic films
… by which a wide variety of low molecular weight organic materials can be patterned without added temperature, pressure, or chemical processing, with just the use of relief-patterned polymeric (PDMS) stamps. It is determined that the diffusion of organic molecules into the polymer matrix is a …
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Field deployable dynamic lighting system for turbid water imaging
… caused by ocean chemistry and entrained organic material. By reducing the size of the scatter interaction volume, one can immediately improve both the focus (forward scatter limited) and contrast (backscatter limited) of underwater images. This thesis describes a relatively simple, …
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Heterogeneous reservoirs in the marine carbon cycle
… is a challenging task because once produced, organic material is oxidized over timescales which range from minutes, to millions of years. This timescale diversity is matched by an equal heterogeneity in both the local physical and chemical environment. In this thesis we explore the …
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