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Filtering by: Creator Smyth, Jeffrey D. Remove constraint Creator: Smyth, Jeffrey D. Committee Member Nason, Jeffrey A. Remove constraint Committee Member: Nason, Jeffrey A.

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  • Experimental approach for the determination of lignin modification by manganese peroxidase

    Creator:
    Goby, Jeffrey D.
    Abstract:
    Degradation of lignin to simpler compounds is desirable for removing residual lignin during paper manufacture and accessing biomass carbohydrates for biofuel production, among other purposes. Lignin transformation using enzymes found in white rot fungi, some of nature's most efficient lignin-degrading organisms, offers a more environmentally benign, selective, and possibly less...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Jeffrey D. Goby

  • A multiscale approach to bacterial adhesion

    Creator:
    Ostvar, Sassan
    Abstract:
    This work is an attempt to develop a simple physical description for the initial interactions between a bacterial cell and a substrate surface. This is done by adopting a view that regards bacterial surface biomolecules not as secondary and add-on contributors to the potential energy function that characterizes the overall...
    Resource Type:
    Masters Thesis
    Full Text:
    to Bacterial Adhesion Abstract approved: Brian D. Wood This work is an attempt to develop a simple

  • Removal of E. coli with alternative media Biosand filters

    Creator:
    Fulton, Nathan J.
    Abstract:
    When Biosand filters cannot be constructed with crushed quarry rock due to resource limitations, a suitable alternative filter media is needed. In this research, two crushed quarry rock alternatives were examined. Three bench-scale Biosand filters with crushed rock, beach sand, and heat-treated beach sand media were simultaneously dosed with Willamette...
    Resource Type:
    Masters Thesis
    Full Text:
    presented on August 16, 2012. Title: Removal of E. coli with Alternative Media Biosand Filters. Brian D

  • Characterization of the feedback between the instructor and student teams engaged in a virtual bioreactor laboratory project

    Creator:
    Whinnery, Jaynie L.
    Abstract:
    This thesis characterizes the feedback between the instructor and student teams engaged in a Virtual Bioreactor (VBioR) Laboratory Project. The project allows senior-level chemical, biological, and environmental engineering students to apply their developing knowledge and skills in an industrially situated process optimization project. Feedback is an important tool for instructors...
    Resource Type:
    Masters Thesis
    Full Text:
    Bioreactor Laboratory Project Abstract approved: Milo D. Koretsky This thesis characterizes

  • Bacterial hydrophobicity : assessment techniques, applications and extension to colloids

    Creator:
    Saini, Gaurav
    Abstract:
    This research details laboratory assessment of bacterial hydrophobicity, variations in bacterial adhesion properties with growth and extended starvation as well as extension of this assay to colloidal hydrophobicity measurement. Hydrophobicity is an integral component of surface interactions and has been studied extensively for its role in a number of engineering...
    Resource Type:
    Dissertation
    Full Text:
    , Applications and Extension to Colloids Abstract approved: Brian D. Wood This research

  • Effects of silver ions and nanoparticles on suspended cells and biofilms of Nitrosomonas europaea

    Creator:
    Barker, Leila Kelly
    Abstract:
    Silver nanoparticles are increasingly being incorporated into consumer products due to their broad-spectrum antimicrobial properties. The resulting influx of silver nanoparticles into wastewater may pose a threat to bacteria involved in biological wastewater treatment. Ammonia-oxidizing bacteria, which convert ammonia to nitrite in the first step of nitrification, are highly sensitive...
    Resource Type:
    Masters Thesis

  • Spatial and Temporal Variability of Heavy Metals (Lead, Copper, and Zinc) in Stormwater, Moss, and Street Dust in Portland, OR

    Creator:
    Bauer, Sophia O. A.
    Abstract:
    Lead (Pb), copper (Cu), and zinc (Zn) are known to have detrimental effects on aquatic and terrestrial ecosystems, and to human health both in rural and urban areas. Heavy metal contamination enters stormwater by atmospheric deposition and by the collection of surface particles during overland flow. Stormwater runoff in urban...
    Resource Type:
    Masters Thesis
    Full Text:
    ..................................................................136 Appendix D. Comparison of concentrations of different media by collection time

  • Binding of bacterial lipopolysaccharide by the cationic amphiphilic peptide WLBU2 at interfaces

    Creator:
    Ryder, Matthew P.
    Abstract:
    Passage of blood through a sorbent device for removal of bacteria and endotoxin by specific binding with immobilized, membrane-active, bactericidal peptides holds promise for treating severe blood infections. Peptide insertion in the target membrane and stable binding is desirable, while membrane disruption and release of degradation products to the circulating...
    Resource Type:
    Dissertation
    Full Text:
    ...................................................................... 68 Surface Modification of QCM-D sensors

  • Novel Approaches to Evaluate the Environmental Impacts of Nanomaterials

    Creator:
    Wu, Fan
    Abstract:
    Numerous studies have shown that some nanomaterials are highly toxic to aquatic organisms and can potentially disrupt overall community health; however, current methods to evaluate the nanomaterials environmental impacts rarely consider the environmental realism or provide sufficient detail on the impact at the community level. Here we demonstrate three approaches...
    Resource Type:
    Dissertation
    Full Text:
    members, Dr. Tyler Radniecki, Dr. Jeffrey Nason, Dr. Lewis Semprini, and Dr. Perry Hystad, I cannot

  • Addressing Persistent Challenges in Nanotoxicology Exposures : Techniques for in situ Characterization

    Creator:
    Crandon, Lauren E.
    Abstract:
    Nanoparticles (NPs), defined by their size (1-100 nm), are increasingly incorporated into commercial and industrial products due to their high surface area and unique properties. They can be designed for specific applications by manipulating composition, size, shape, and surface functionalization. As NP production and complexity increases, there is a need...
    Resource Type:
    Dissertation
    Full Text:
    dissertation possible. Thank you so much to my committee members Dr. Jeffrey Nason, Dr. Tyler Radniecki, Dr