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 13 of 13 for “"Irreversible adsorption"”.
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Reversible and irreversible adsorption of naphthalene and α-naphthol to soil
… soils with different organic carbon contents. Adsorption conditions were varied to estimate the extent that biologically-mediated and chemically-induced oxidative coupling, and rate-limited diffusive processes contributed to the apparent irreversible adsorption of these compounds. The purposes …
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Tales of Seduction and Betrayal: Host Genes Required for Assault of Salmonella by Bacteriophage P22
… affected by the host mutation. (1) Reversible adsorption. Lipopolysaccharide mutants were the predominant class and affected reversible adsorption of the phage, these mutants were not characterized further because they have already been well studied. (2) Irreversible adsorption and ejection. A …
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Deposition of Metal Oxides and Metal Carbonyls on Silicon Surfaces Using Solution Chemistry
… the surface. Finally, numerical simulations of irreversible adsorption were used to calculate theoretical yields for comparisons to the experimental coverage values.
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Single-molecule imaging studies of protein dynamics
… thesis covered three broad topics. First, the adsorption mechanisms of proteins onto hydrophobic and hydrophilic fused silica surfaces were imaged and reversible and irreversible adsorption mechanisms were observed. The second topic covered a new technique for measuring the diffusion …
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Studies of Macromolecule/Molecule Adsorption and Activity at Interfaces
… on a wide variety of polysaccharide systems. Adsorption of cationic cellulose derivatives onto self-assembled monolayer (SAM) surfaces was investigated using liquid-phase SPR. Results from SPR showed that depending upon the cellulose derivative structure, irreversible adsorption ranging from a …
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Studies of heterogeneous ice chemistry relevant to the atmosphere
… The presence of the QLL also enhances CH₃COOH adsorption. We find that the solubilities of HC1 and CH₃COOH in the QLL are intermediate between the solubilities of each species in liquid H20 and those in ice. In a flow-tube CIMS study of HCI adsorption on different types of ice surface, we found …
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Adsorption Kinetics and Phase Behavior of Particles Adsorbed at an Interface
<p>The ability to predict the adsorption dynamic, phase behavior, and surface pressure of a monolayer of adsorbed particles in two-dimensional systems are key aspects of many current research areas. Examples include phase transitions in amphiphilic monolayers, emulsion stability due to particle …
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Possibilities for recycling cellulases after use in cotton processing
… of the cellulase complex by preferential and irreversible adsorption to the cotton substrates. End-product inhibition studies showed that the build-up of cellobiose and glucose in solution would cause less than 25% activity loss after five treatment cycles. Agitation levels similar to those …
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Optical Sensors for High-Temperature Pressure Measurement and Real-Time Particle Detection
… analytical model is established to describe the adsorption of gold nanospheres onto cylindrical and spherical silica surfaces from quiescent aqueous particle suspensions. The curved surfaces of the fiber taper and microspheres are coated with nm-thick layer of a polycation, enabling irreversible …
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A study of column switching liquid chromatography in drug analysis.
… was lower with the smaller 1x10 mm precolumn. Irreversible adsorption of matrix components in the column adversely affected the performance of the system. A column switching assay for biguanides involving an analytical mobile phase containing a high concentration of hydrophobic pairing ion was …
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Impact of Amphiphiles in Cellulase Stabilization, Recycling and Ethanol Production from Pretreated Biomass
… expose the enzyme to air-liquid interface and irreversible adsorption to lignin and crystalline cellulose that inhibit their catalytic action. In this dissertation, the potential role of novel protein-based micelles and surfactant or protein-based polymeric micelles (PMs) was tested on enzyme …
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Dynamics and Phase Behavior of Mixed Antibody-Excipient Adsorption at an Air/Water Interface
… adsorb to air/water interfaces. Interfacial adsorption presents a central problem to the production and use of antibody-based pharmaceuticals. Air/water interfaces are frequently generated during the manufacture (filtration and chromatography) and production (freezing, thawing, filtration and …
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Understanding the effects of promoters on the direct synthesis of hydrogen peroxide over supported palladium catalysts
… presence of strongly bound Br*-atoms. Bromide adsorption isotherms show that reduced Pd nanoparticles adsorb well over a monolayer of Br*-atoms, which suggests Br saturates surface Pd and subsequently intercalates within the near-surface region of Pd nanoparticles. Infrared spectra of adsorbed …