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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 71 for “"barrier properties"”.
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Characterization and modeling of the barrier properties in nanostructured systems
… the development new materials with permeation properties tailored on the specific application, especially in packaging systems. The methods used to achieve this goal were a detailed experimental characterization and different simulation methods. The experimental campaign regarded the …
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The Barrier Properties of the Skin of Aquatic and Semi-Aquatic Vertebrates
… skin is a heterogeneous organ that acts as a barrier to the external environment. A crucial structure for skin barrier function is the tight junction (TJ) complex that links skin epidermal cells. TJ proteins have been examined in mammalian skin but little is known about skin TJ proteins of …
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Stability, structure, and barrier properties of self-assembled films on metal supports
… and crystalline structure, these films provide a barrier that impedes the transport of oxygen and water to the copper surface. As measured by electrochemical impedance spectroscopy, the resistance provided by these films increases by 4.2 MQ*cm 2 for each methylene unit in the adsorbate that forms …
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RAC1-Mediated Actin Cytoskeleton Remodeling and Monolayer Barrier Properties of Stretched Alveolar Epithelial Cells
… due to basement membrane deformation and reduced barrier function. AECs maintain integrity of the blood-gas barrier with gasket like intercellular tight junctions (TJ) which are anchored internally to the actin cytoskeleton. Our goal was to evaluate the effect of physiologically relevant, high …
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The blending and permeability of polymers for packaging applications
… a material with optimal water vapour and oxygen barrier properties. The effect of compatibilizers on phase dispersion has been investigated using three commercial Polybond's, PB3002, PB1001, and PB3009. Three compatibilizers prepared in-house were also used as, maleic anhydride(MA) grafted on PP, …
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Characterization of Hydrophobically Modified Titanium Dioxide Polylactic Acid Nanocomposite Films for Food Packaging Applications
… dioxide (TiO2) polymer nanocomposites improve barrier properties to gas and moisture and mechanical strength as well as providing active packaging functions. However, low compatibility between hydrophilic TiO2 nanoparticles and hydrophobic polymers such as polylactic acid (PLA) causes problems …
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A fundamental investigation of surface-induced skin irritation
… known to induce skin irritation by damaging the barrier properties of the stratum corneum, the outer layer of the skin, and denaturing proteins in the epidermis and the dermis. The goal of this thesis has been to understand the relationship between the physicochemical properties of surfactant …
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Finishing Processes for Zein Biodegradable Films
… acid films provided films with range of tensile properties, gas barrier properties, and thermal properties. The range could make zein-based films potentially useful in packaging applications for fresh produce of different respiration rates.
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Phonophoresis and topical drug delivery
… and then examined for changes in its barrier properties. At high intensities (1 to 2W cm-2), ultrasonic waves irreversibly compromised the barrier properties of the skin, following the general patterns described in the literature reports. At low intensities (< 1W cm-2), ultrasound …
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A study of surface roughness issues in magnetic tunnel junctions
… technique. Experimental results show that the barrier properties and the performance of the magnetic tunnel junction elements depend on the microstructure of tunnel barrier.
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Functionalization and Dispersion Stability Study of Graphene Materials in 2K Urethane Coating System and Expanded Interlayer Spacing of Vanadium Oxide Nanomaterials for Energy Storage Applications
… We took advantage of the hydrophobic and barrier properties present in graphene through including pristine and functionalized graphene materials in different 2K coating systems and observing their effects on corrosion protection. Vanadium oxide nanofibers and nanoflowers were also …
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Production of Dermal Inspired Collagen Architectures by Lyophilisation and Electrophoretic Deposition
… with synthetic membranes to afford additional barrier properties. This work aimed to produce dermal-inspired collagen structures that better replicate the native dermal and epidermal structure and function. Aqueous suspensions of 1% w/v insoluble collagen type I were freeze-dried to create …
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Coarse-grained simulations to predict structure and properties of polymer nanocomposites
… of enhanced mechanical, electrical, optical, and barrier properties observed of PNCs, relative to the properties of the unfilled polymer. This interface can determine the miscibility of the nanofiller in the polymer, which, in turn, influences the PNC's properties. In addition, this interface …
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Drying Oils Treated by Irradiation as Coatings for Biobased Films
… their performance with respect to water and gas barrier properties is inferior to current packaging products on market. Drying oils are promising as film coatings to improve water barrier properties of protein-based films. Drying oils undergo autoxidation after a period exposure to air to yield …
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