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 20 of 593 for “"model systems"”.
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Coupled electron and nuclear dynamics in model systems
… same level. This is only possible for very small systems. A model system developed by Shin and Metiu [1, 2] contains all necessary physical ingredients to describe a combined electronic and nuclear motion. It consists of a single nuclear and electronic degree of freedom and the particle …
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Merging molecular recognition and catalysis with model systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1995.
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Membrane transport studies: novel methods, model systems and thermodynamics
… could be used in conjunction with both simple model membranes and more complex biological membranes, namely the epidermis. From the data achieved from the cell it was possible to derive a series of equations which allowed access to thermodynamic parameters such as ?H, ?G and ?S. An extension of …
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Antioxidant properties of flaxseed lignans using in vitro model systems
… dihydrochloride (AAPH 47) in an in vitro model of lipid peroxidation. This investigation was facilitated by the structural elucidation of the major oxidative compounds and the ability of flaxseed lignans to delay the onset of oxidation in two model systems. This study showed that SECO 2 …
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Molecular mechanisms of microbial interactions in model systems and natural environments
… physiological and transcriptional changes in the model diatom Thalassiosira pseudonana through lab co-culture experiments. In response to extracellular bacterial metabolites, T. pseudonana showed inhibition of cell division, with transcriptional changes in cell cycle regulation, amino acid …
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Investigations of Serotonin Metabolism in Mammalian and Other Deuterostome Model Systems
Here the metabolism of 5-HT has been investigated in higher animals, the deuterostomes, which included the invertebrates Xenoturbella bocki, a marine worm, and Strongylocentrotus purppuratus, the sea urchin as well as mammals such as Rattus norvegicus. Studies were performed using a highly …
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Sensory Perceptions of Potassium Salts in Liquid and Solid Model Systems
Overall this research substantiated that potassium's sensory impact on flavor perceptions is concentration dependent. High concentrations elicit bitter and other unpleasant perceptions. Presence of xanthan could aid in formulating fortified potassium products by lessening potassium's adverse flavor …
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The Initial Events of T-Cell Activation in Realistic Model Systems
… crucial steps: the development of more realistic model systems to study those interactions, and advanced fluorescence microscopy to image and quantify the interactions in live T cells. Firstly, supported lipid bilayers (SLBs) as model surfaces for the APC membrane were improved by presenting a …
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Formation and inhibition of advanced glycation endproducts in meat and model systems
… in a bovine serum albumin and glucose (BSA-GLU) model system. The ST extract significantly (P <0.05) inhibited CML formation compared to the control group. ST particularly contained vanillic acid (VA), chlorogenic acid (CHA), gentisic acid (GEA), and ferulic acid (FA), where GEA and CHA mitigated …
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High temperature SO2 chemisorption on model systems. Implications for in-plume processes.
… SO2 uptake experiments were conducted on model Ca-aluminosilicate xerogels and on glasses with chemical compositions of common ash types. The materials were characterised using bulk and surface-sensitive techniques to gain insight into the mechanisms of scavenging and the reaction products …
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The effect of peroxidase on model systems of lipoxidase and linoleic acid
Thesis (M.S.)--Michigan State University. Dept. of Food Science and Human Nutrition, 1973
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EXPLORING LYCOPODIACEAE ENDOPHYTES, DENDROLYCOPODIUM SYSTEMATICS, AND THE FUTURE OF FERN MODEL SYSTEMS
… Lastly, I assess the status of developing fern model systems and discuss possible future directions for this work.
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Vaping Additives Affect Lateral Organization and Functionality of Lung Surfactant Model Systems
… function. The aim of this thesis was to use model surfactants to better understand the interactions between vaping additives and the primary lipid components of lung surfactant. These films were made up of phosphatidylcholines, phosphatidylglycerols, and cholesterol. Additionally, the …
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The pathological and genomic impact of CTCF depletion in mammalian model systems
… In a genetically engineered mouse model, Ctcf hemizygous cells showed modest but robust changes in almost a thousand sites of genomic CTCF occupancy; these were enriched for lower affinity binding events with weaker evolutionary conservation across the mouse lineage. Furthermore, …
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Inverse model systems to investigate metal-support interactions in Fischer-Tropsch catalysis
… in Co/SiO2 catalysts using an inverse model system by modifying Co3O4 nanocrystallites with silanes (i.e. tetraethoxysilane, trimethyl chlorosilane, triphenyl ethoxysilane). It is postulated that the formation of Co-O-Si will alter the catalytic properties of the cobalt site to which …
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Hydrogen bonding in aqueous solution and peptide helicity studied using model systems
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.
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Towards new model systems for the study of proton-coupled electron transfer
Two new model systems for the study of orthogonal proton-coupled electron transfer (PCET) have been developed. The first model system is based on Ru"(HzO)(tpy)(bpy) (tpy = 2,2';6',2"terpyridine, bpy = 2,2'-bipyridine) where methyl viologen (MV2 ) electron acceptors were appended to the ruthenium …
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Evaluation of iron valence state alterations in thermally processed liquid model systems
A glucose glycine liquid model system fortified with 24 ppm of iron as either ferrous sulfate, ferric orthophosphate or ferric orthophosphate + 110 ppm ascorbic acid was thermally processed as 240, 250 and 260°F for 3, 6, 9, 12 and 15 minutes. Levels of elemental, nonelemental, soluble, total ionic …
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