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 38 for “"Glycols"”.
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Physico-chemical properties of polypropylene glycols
Poly(propylene glycol) (PPG) samples of different molecular mass were characterized using differential scanning calorimetry, modulated differential scanning calorimetry, thermogravimetry and thermally stimulated current (TSC) spectroscopy. It was shown, by TSC, that the glass transition temperature …
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Interspecies Pharmacokinetic Scaling and Metabolism of Alcohols and Glycols
… pharmaceutical applications of alcohols andglycols, the interspecies differences with respect to their pharmacokinetics (PK) arepoorly understood. The aim of this research was to use in-vivo and in-vitro approaches to compare and model the PK characteristics across various species.Methods: …
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Structure-property relationships in polyurethanes from lignin
… of soft segments, four polyethylene glycols were used. No soft segment phase in the network was detectable by differential scanning calorimetry or dynamic mechanical analysis. The glass transition temperature of lignin phase dropped by as much as 70°C for HDI and 115°C for TDI based …
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The Reduction of Carbonyl Compounds by Sodium Naphthalenide
… of carbonyl functions to their respective glycols and/or alcohols.
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Viscosity Modeling of Complex Fluids
… fluids, nonpolar hydrocarbons, and aqueous glycols. Existing methodologies were evaluated and expanded for nonpolar hydrocarbon mixtures with applications in modeling reservoir fluids, which contributes to the understanding of the combined effect of characterization, equation of state, and …
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Piezo-optical study of the behaviour of short chain liquid polymers
… and with chain segments for polyethylene glycols and polypropylene glycols, consistent with the freezing behaviour. The n-alkane data may be interpreted as showing some degree of molecular ordering above 150 MPa, analogous to the thermal observations of a mesomorphic liquid state.
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Melt agglomeration with hydrophobic meltable binders in high shear mixer
… meltable binders such as polyethylene glycols, the findings are not fully applicable to hydrophobic meltable binders due to varying physicochemical properties of the latter than those of the former. The agglomerative capabilities of hydrophobic meltable binders remain not fully …
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Synthesis and Characterization of Anhydrous Proton Conducting Polymer Electrolytes for Fuel Cell Applications
… of polymer electrolytes based on polyethylene glycols (MePEGn) changing the chemical structures and other physical properties (Volume fraction of PEG, Free volume, Glass transition temperature, Viscosity) to approach for practical applications. Changing the chemical structure of the polymer …
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Thiocyanate complexes of osmium
… peroxide to other ethelenic compounds to form glycols. Osmium tetroxide is used to develop fresh glycols. Osmium tetroxide is used to develop fresh finger prints. It also finds use as a hardening and staining agent in making sections for study under the microscope in biological work.</p>Many …
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Zur rhodiumkatalysierten Hydroformylierung von Octenen : neue Ligand- und Lösungsmittelkonzepte
… systems and ligands based on polyethylene glycols. The synthesis of monocyclic phosphites and their use in the hydroformylation of octenes allowed conclusions on the influence of the ligand backbone on activity and selectivity. Concerning temperature-dependent multi-component solvent …
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Atlantic Green Chemicals : bio-glycol plants : business plan
… about building and managing three Glycerin to Glycols Plants based on IPD patent that transforms glycerin (a byproduct from bio-diesel production) to Propylene Glycol (PG) using steam and hydrogen. PG has till now been made from fossil fuel in oil refineries. PG is in high demand as de-icing …
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Evaluation of an Industrial Byproduct Glycol Mixture as a Carbon Source for Denitrification
… yield at two different initial concentrations of glycols. Possible inhibition effect on nitrification was also investigated. Three SBR reactors were operated by adding methanol, a low dosage of glycol, and a high dosage of glycol into the reactors. The low dosage glycol reactor exhibited the best …
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Polyethylene glycol stationary phases for capillary gas chromatography
… are the high molecular weight polyethylene glycols (HMW PEG) which are commercially available in a wide range of molecular weights, cross-linkable and uncross-linkable (Carbowax 2OM and 4OM, the Superox series, etc.). Their most outstanding features are their unique polarity and selectivity; …
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Emissions of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate from latex paint
… HPVC and LPVC) containing TMPD-MIB, but no glycols, were employed. Commercial Nippon paints (flat, semi-gloss, and gloss) containing TMPD-MIB and propylene glycol were also tested for concrete-B and gypsum board specimens. Short- and long-term emissions of TMPD-MIB following paint …
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Determining molecular mechanisms of DNA Non-Homologous End Joining proteins
… have DNA termini modifications including thymine glycols, ring fragmentation, 3' phosphoglycolates, 5' hydroxyl groups and abasic sites. Non-homologous end joining (NHEJ) is a major pathway responsible for the repair of these complex breaks. Proteins involved in NHEJ include the Ku 70/80 …
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