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 193 for “"model compounds"”.
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The Bacterial Degradation of Lignin Model Compounds
Made available in DSpace on 2014-12-10T23:00:56Z (GMT). No. of bitstreams: 1 7105262.pdf: 4069407 bytes, checksum: 69e10ccbcd80763786ee948a152d8488 (MD5) Previous issue date: 1970
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Catalytic Hydrogenation and Hydrodesulfurization of Model Compounds
… of heterocyclic S-containing compounds. Alkyl substituted thiophenes are promising candidates for hydrogen carriers as the dehydrogenation reactions are known to occur under mild conditions. Four types of catalysts including supported noble metals, bimetallic noble metals, …
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Model Compounds for the Photoactivation of Glycosyl Donors
… promote glycosylation. This involved photolyzing model pyran compounds, in the presence of various photosensitizers, to induce an intramolecular cyclization. This cyclization leads to the generation of an oxonium intermediate that may alkylate other nucleophiles, which should be analogous to a …
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Hydroxypropylation of lignin and lignin-like model compounds
… investigation included studies with lignin-like model compounds under conditions of varying KOR concentrations at 190°C. Reaction rate and molar substitution were determined. Homogeneous ( completely liquefied ) Kraft lignin products were . 0 only obtained at reaction temperatures above 190 C or …
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Synthesis of lignin-carbohydrate model compounds and neolignans
… chemical cleavage methods, DDQ oxidation and model compound/NMR methods. The synthesis of plant cell wall model compounds and neolignans are reviewed in Chapter 3. The experimental work performed for the completion of this thesis is described in Chapters 4-8. A method which provides β-𝘖-4 …
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Multinuclear NMR Studies of Hemoproteins and Their Model Compounds
… the nature of the iron-oxygen bond in the heme model compound, $\sp $O$\sb2$-picket fence porphyrin, has been probed by the use of solid state oxygen-17 NMR. The results demonstrated that the oxygen-l7 chemical shifts of both the terminal and bridging oxygen atoms are unusually shifted to the …
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Catalytic Pyrolysis of Cellulose, Hemicellulose and Lignin Model Compounds
… pyrolysis of cellulose, hemicellulose and lignin model compounds was investigated at 450 °C. NaOH pretreated and untreated cellulose was pyrolyzed on sand and the HZSM-5 catalysts; VPISU001 HZSM-5, BASF HZSM-5, and Sud-Chemie HZSM-5. The pyrolysis of cellulose on BASF and Sud-Chemie HZSM-5 …
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Syntheses of Monomers and Model Compounds for High Temperature Polymers
No abstract prepared.
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Octacalcium Phosphate - Metabolite Composites: model compounds for bone mineral structure
… dissolution of mineral in the area undergoing remodelling. Bone degenerative diseases occur when the balance between bone resorption and deposition of new bone in the turnover process is altered. Bone is a nanocomposite material composed of a mineral phase (calcium phosphate) deposited within an …
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Toward model compounds for the resting cytochrome c oxidase active site
… imidazole-containing tail. The metalloporphyrin compounds are of special interest, with both neutral imidazole and charged imidazolate tail forms being possible. Characterization of these compounds have included physical measurements utilizing NMR, IR, EPR, $\sp{57}$Fe Mossbauer, and MCD …
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Reaction mechanisms of hydrothermal liquefaction of model compounds and biowaste feedstocks
… of this technology, experiments with both model compounds and typical biomass (e.g. swine manure) as feedstock were conducted, the product distribution and the properties were analyzed. Some possible reaction pathways of specific compounds were proposed. HTL tests were conducted for swine …
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Spectroscopic studies on cytochrome P450 11-beta-hydroxylase and model compounds
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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Synthesis and Characterization of Model Compounds For Self-Assembled Dithienophosphole-Based Phosphamides
… documents the synthesis and characterization of model compounds for self-assembled dithienophosphole-based phosphinamides. Expanding upon the blue-emitting series within this class of compounds and targeting applications in white OLEDs, green and orange emitters, along with their corresponding …
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Catalytic hydrodenitrogenation and hydrodeoxygenation of model compounds in a trickle bed reactor
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1983.
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Synthesis and dynamics of [gamma]-alumina supported molybdenum subcarbonyls and model compounds
… of metal tricarbonyl complexes, which serve as model compounds for Mo(CO)₃(ads), are characterized by variable temperature CP-MAS ¹³C NMR in order to determine the presence of motional processes involving the carbonyl ligands. These findings yield additional information about the nature of …
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A Spectroscopic Investigation of Some Biologically Important Model Compounds and Their Metal Complexes
Made available in DSpace on 2014-12-09T17:35:12Z (GMT). No. of bitstreams: 1 6507083.pdf: 5307507 bytes, checksum: 1c575f23d03db8c45ee134146b3276d2 (MD5) Previous issue date: 1965
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Theoretical and Experimental Investigations of Chemical Shielding in Amino Acids, Proteins and Model Compounds
… in the structure refinement process. Amino acid model calculations have been utilized in an investigation of chemical shielding in proteins and solid state polypeptides, while metalloporphyrin model compounds have been studied to provide insight into small ligand binding in respiratory …
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