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Filtering by: Subject Adsorption Remove constraint Subject: Adsorption Advisor Mcguire, Joseph Remove constraint Advisor: Mcguire, Joseph License All rights reserved Remove constraint License: All rights reserved

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  • 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:
    surrounding the possibility of fibrinogen adsorption warrant further investigation, as the location of

  • Assaying the activities of Thermomonospora fusca E₅ and Trichoderma reesei CBHI cellulases bound to polystyrene

    Creator:
    Kongruang, Sasithorn
    Abstract:
    In this study the enzymatic activity of adsorbed Thermomonospora fusca E₅ and Trichoderma reesei CBHI cellulases were investigated using fluorescence techniques. In particular, cellulases were allowed to contact hydrophobic polystyrene surfaces under conditions of different solution concentrations, and adsorption times. Each of these variables is known to have a potential...
    Resource Type:
    Masters Thesis
    Full Text:
    under conditions of different solution concentrations, and adsorption times. Each of these variables

  • 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:
    used to record the adsorption and conformational changes of (amphiphilic) WLBU2 and S-WLBU2, and

  • The adsorption of human recombinant factor VIII in the presence of the nonionic triblock surfactant Pluronic® F-68 at the air-water interface

    Creator:
    Alkhatib, Aveen K.
    Abstract:
    The adsorption behavior of a human recombinant Factor VIII (rFVIII) in the presence of the nonionic, poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock surfactant Pluronic® F-68 was evaluated by dynamic air-water tensiometry. Surface tension kinetics were recorded for F-68 in the absence of protein at concentrations ranging from 0 to 10,000...
    Resource Type:
    Masters Thesis
    Full Text:
    presented on December 9, 2009. Title: The Adsorption of Human Recombinant Factor VIII in the Presence of

  • 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:
    microchannel and membrane materials. Protein adsorption was detected by measurement of surface-bound enzyme

  • 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:
    : Quantifying Nisin Adsorption Behavior at Pendant Polyethylene Oxide Brush Layers Abstract approved

  • Interaction of recombinant factor VIII and the nonionic surfactant Tween 80 at interfaces

    Creator:
    Joshi, Omkar
    Abstract:
    The role of the nonionic surfactant Tween 80 on the behavior of the therapeutic recombinant protein Factor VIII (rFVIII) was investigated at solid/liquid and air/water interfaces. In order to provide a model system to compare results obtained for the complicated rFVIII-Tween system, a well-characterized globular protein lysozyme was used. The...
    Resource Type:
    Dissertation
    Full Text:
    Tween to the adsorption substrate in different manners, either lysozyme Tween together or in sequence

  • Nisin adsorption to PEO-PPO-PEO tri-block copolymer layers and its resistance to elution by fibrinogen

    Creator:
    Ryder, Matthew P.
    Abstract:
    While hydrophobic surfaces coated with the poly[ethylene oxide]-poly[propylene oxide]-poly[ethylene oxide] (PEO-PPO-PEO) surfactant Pluronic® F108 are highly resistant to plasma protein adsorption, the antimicrobial peptide nisin has been observed to adsorb in multilayer quantities at such surfaces, and the PEO chains themselves suggested to inhibit nisin exchange by blood proteins. But...
    Resource Type:
    Masters Thesis
    Full Text:
    degree of Master of Science in Chemical Engineering presented on May 18, 2009. Title: Nisin Adsorption

  • Molecular origins of surfactant-mediated stabilization of protein

    Creator:
    Lee, Hyo Jin
    Abstract:
    Nonionic surfactants are commonly used to stabilize proteins during upstream and downstream processing and drug formulation. Surfactants stabilize the proteins through two major mechanisms: (i) their preferential location at nearby interfaces, in this way precluding protein adsorption; and/or (ii) their association with protein into "complexes" that prevent proteins from interacting...
    Resource Type:
    Dissertation
    Full Text:
    : (i) their preferential location at nearby interfaces, in this way precluding protein adsorption

  • Surfactant interactions with recombinant factor VIII at the air/water interface

    Creator:
    Chu, Liping
    Abstract:
    The surface tension kin'ti4tnd ste'dy state behavior exhibited by mixtures of selected surfactants with a recombinant Factor VIII (rFVIII) were evaluated with automated interfacial tensiometry. In particular, fresh solutions of rFVIII with different concentrations of Tween 80, sodium dodecylsulfate (SDS), or dodecyltrimethylammonium bromide (DTAB) were prepared and their surface tension...
    Resource Type:
    Masters Thesis
    Full Text:
    adsorption and subsequent rearrangement (including protein-surfactant dissociation) at the interface. The