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Filtering by: Creator Aiken, Karl A. Remove constraint Creator: Aiken, Karl A. Advisor Mcguire, Joseph Remove constraint Advisor: Mcguire, Joseph

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  • 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:
    Karl F. Schilke_ Passage of blood through a sorbent device for removal of bacteria and endotoxin by

  • Quantification of fibrinogen adsorption to nisin-loaded polyethylene oxide layers

    Creator:
    Auxier, Julie A.
    Abstract:
    Antimicrobial coatings used to reduce the risk of infection caused by tissue-contacting medical devices must address specific biocompatibility requirements including prevention of thrombosis and rise of bacterial resistance. An antimicrobial-loaded poly(ethylene-oxide) (PEO) coating has been tentatively shown to be non-fouling with sustained antimicrobial activity. However, the presence of the antimicrobial,...
    Resource Type:
    Honors College Thesis
    Full Text:
    Julie A. Auxier for the degree of Honors Baccalaureate of Science in Bioengineering presented on June

  • Molecular origins of peptide entrapment in polyethylene oxide layers

    Creator:
    Wu, Xiangming
    Abstract:
    A more quantitative understanding of peptide entrapment and elution from otherwise protein-repellent polyethylene oxide (PEO) brush layers will provide direction for development of new strategies for drug storage and delivery. Here we describe criteria for peptide integration and structural change within the PEO brush, and discuss the reversibility of peptide...
    Resource Type:
    Dissertation
    Full Text:
    : _____________________________________________________________________ Joseph McGuire Karl F. Schilke A more quantitative understanding of

  • Retention of protein repulsive character and antimicrobial activity of PEO brush layers following nisin entrapment

    Creator:
    Auxier, Julie A.
    Abstract:
    Nisin, an amphiphilic, antimicrobial peptide, has been shown to integrate into the hydrophobic inner region of poly(ethylene oxide) (PEO) brush layers; however, the presence of integrated nisin may compromise the protein repulsive character of the PEO layer. In particular, the introduction of fibrinogen to nisin-loaded brush layers has been observed...
    Resource Type:
    Masters Thesis
    Full Text:
    A. Auxier, Justen K. Dill, Karl F. Schilke, Joseph McGuire * School of Chemical, Biological

  • Synthesis and evaluation of PEO-coated materials for microchannel-based hemodialysis

    Creator:
    Heintz, Keely
    Abstract:
    The marked increase in surface-to-volume ratio associated with microscale devices for hemodialysis leads to problems with hemocompatibility and blood flow distribution that are more challenging to manage than those encountered at the conventional scale. In this work, stable surface modifications with pendant polyethylene oxide (PEO) chains were produced on polycarbonate...
    Resource Type:
    Masters Thesis
    Full Text:
    decreased with PEO-PBD-PEO treatment; a PEI (polyethylene imide) layer exists on the AN69 ST membrane

  • Quantifying nisin adsorption behavior at pendant polyethylene oxide brush layers

    Creator:
    Dill, Justen K.
    Abstract:
    A more quantitative understanding of peptide loading and release from polyethylene oxide (PEO) brush layers will provide direction for development of new strategies for drug storage and delivery. The antimicrobial peptide nisin shows potent activity against Gram-positive bacteria including the most prevalent implant-associated pathogens, its mechanism of action minimizes the...
    Resource Type:
    Masters Thesis
    Full Text:
    be learned in a laboratory. My sincere appreciation goes out to Dr. Karl Schilke who was absolutely

  • Functionalization of Surfaces with Nisin in a Polyethylene Oxide Brush Layer

    Creator:
    Ryder, Matthew P.
    Abstract:
    Infections in hospitals account for over 100,000 deaths per year. These infections occur at the hospital from complications following bacterial adhesion to intravenous catheters, coronary stents and other implanted devices. Another common problem is protein adsorption to the surface of the device and subsequent blood clotting. Methods for combating these...
    Resource Type:
    Honors College Thesis
    Full Text:
    :  Functionalization of Surfaces with Nisin in a Poly‐ ethylene Oxide Brush Layer.    Abstract Approved

  • Characterization and application of PEO-containing triblock copolymer surfactants

    Creator:
    Snider, Joshua L.
    Abstract:
    The action of pendant, polyethylene oxide (PEO) brush layers as nonfouling coatings for biomedical materials is well understood. However progress toward clinical application of stable, high density PEO coatings has historically been impeded by the lack of cost effective, noninvasive methods for their preparation. Triblock polymers featuring a hydrophobic, polypropylene...
    Resource Type:
    Honors College Thesis
    Full Text:
    - invasive methods for their preparation. Triblock polymers featuring a hydrophobic, polypropylene oxide

  • Molecular Origins of Recombinant Factor VIII (rFVIII)

    Creator:
    Tadehara, Katherine M.
    Abstract:
    The capability of Pluronic® F68 to stabilize human recombinant Factor VIII in solution was assessed using zeta potential measurements. Hemophilia A is a genetic disorder in which the body is missing Factor VIII (FVIII) from the blood coagulation cascade. The pharmaceutical industry developed recombinant Factor VIII (rFVIII), the largest cloned...
    Resource Type:
    Honors College Thesis
    Full Text:
    Katherine M. Tadehara A PROJECT Submitted to Oregon State University University

  • Molecular origins of peptide entrapment within polyethylene oxide brush layers

    Creator:
    Lampi, Marsha C.
    Abstract:
    Effective surface coatings for tissue-contacting medical devices should prevent both biofilm formation and infection. One method to achieve this aim is protein repellant polyethylene oxide (PEO) brush coatings loaded with antimicrobials. Previous research has demonstrated that the antimicrobial nisin adsorbs to PEO brush layers in multi-layer amounts and suggests that...
    Resource Type:
    Honors College Thesis
    Full Text:
    brush layers and is a necessary step in the development of bioactive coatings. Optical waveguide