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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 92 for “"Polyol"”.
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Synthesis, Characterization, and Utilization of Polyol Amphiphile Molecules
Polyol amphiphiles were synthesized with various hydroxyl chain lengths and hydrophobic moieties, including oleyl and oligo(styrene). These novel amphiphiles are predictably hygroscopic, forming lyotropic liquid crystals upon exposure to water. The resulting lamellar and hexagonal mesophases were …
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Polyol induced extraction (PIE) of water from organic solvents
… In a quest for an MSA, our investigation reveals polyols as a new class of MSAs. It is observed that when a polyol such as glycerol, sorbitol, erythritol, xylitol, Isomalt® or maltitol is added to a mixture of ACN-water, the ACN separates out of the mixture to form a new immiscible upper phase. …
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Synthesis and evaluation of polyol based biolubricants from vegetable oils
… The objective of this project was to develop a polyol-based biolubricant from vegetable oils with excellent oxidative stability and low temperature flow properties. In the first study, a strong positive correlation was observed between saturated fat content and melting point while the content of …
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Extraction of Capsaicin Using the Polyol Induced Extraction (PIE) Method
<p>Polyol-induced extraction (PIE) is an extraction technique for separating organic solvents from water, using glycerol and polyol as separating agents. Glycerol binds water releasing the organic solvent as a separate liquid phase. this thesis, investigates how the PIE process may be used to …
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Polyol- und Azlacton-Makromonomere für Netzwerksysteme, neue Werkstoffe und biomedizinische Anwendungen
… war die Herstellung von Makromonomeren auf Polyol- und Azlactonbasis, um neue Netzwerke, insbesondere für Anwendungen in der Medizin, maßzuschneidern und grundlegende Struktur / Eigenschaftsbeziehungen aufzuklären. <br>Es wurden neue Polyolmakromonomere durch Vinylacetatoligomerisation in …
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Enzymes of polyol metabolism in hyphal differentiation and fruiting of Schizophyllum commune
This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).
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The electrochemical mediation of oxygen delignification of pulp with a manganese polyol complex
A redox cycle involving a manganese gluconate complex and oxygen in an aqueous alkaline media was investigated for its ability to delignify chemical pulp. Current applied at a cathode was used to reduce the higher oxidation states of the manganese complex. The reaction of the manganese (II) and …
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Isolation and characterization of the (NAD(P)-independent)polyol dehydrogenase from the plasma-membranes of gluconobacter oxydans ATCC strain 621
… large number of different polyhydroxy alcohols (polyols). These oxidations are catalyzed by constituitively synthesized plasma-membrane bound dehydrogenases. These bacteria would have to expend much energy to constituitively synthesize a separate substrate-specific dehydrogenase for each polyol …
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Regulation of pyruvate kinase and glycerol-3-phosphate dehydrogenase in the freeze tolerant goldenrod gall fly: role in polyol cryoprotectant production
… The roles that these enzymes play in polyol cryoprotectant synthesis and metabolic regulation were investigated. A primary focus was the potential for reversible post-translational modifications (PTMs) to regulate enzyme activity. Several PTMs were analyzed for PK and G3PDH from …
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Konstruktion und Durchmusterung von Metagenombanken: Identifizierung und Charakterisierung von Genen und Genprodukten von am Polyol-Stoffwechsel beteiligten Oxidoreduktasen und Coenzym B12-abhängigen Dehydratasen
… Indikatoragar auf die Bildung von Carbonylen aus Polyolen untersucht. 16 aus ursprünglich 24 positiven E. coli-Klonen beinhalteten Plasmide (pAK101 bis pAK116) die einen stabilen Phänotyp vermittelten. Acht der positiven Klone zeigten NAD(H)-abhängige Alkohol-Oxidoreduktase-Aktivität mit Polyolen …
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Synthesis of environmentally-friendly polyurethane dispersions based on soybean oil- derived polyols and their applications in advanced water-based and uv-cure coatings
… order to develop these properties, two different polyol families were synthesized. The first polyol can be used in ambient curable systems, and the second can be utilized in ultraviolet radiation cure coatings. For ambient curable systems polyether chemistry based soy-polyol was developed from …
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The analysis of the non-volatile components of heated fatty acid esterified propoxylated glycerols
… oil samples indicating the presence of the polyol backbone was not necessarily for the formation of dimer bonds between TAG molecules. Thus, it would appear that dimers formed in the fatty acid portion of the molecule as opposed to the polyol portion, however, the exact location could not be …
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Renewable Source Thermoplastics
… has recently developed a renewable source Polyol (Cerenol) which is derived from 1,3 propane diol processed from corn feeds. This material, which is a three carbon ether repeat unit, is in the pre-commercial stage and is meant to directly compete with petroleum based polyols as a drop-in …
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The role of respiration-dependent proton translocation in the acid tolerance of Gluconobacter oxydans
… and the ability to carry out rapid, single-step polyol oxidation catalyzed by membrane bound ehydrogenases. Experiments were designed to determine whether acid tolerance is associated with rapid polyol oxidation in this organism. Washed cells were exposed to 0.1 M or 0.5 !vt NaCI at pH 3.20; …
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A study of the thermal degradation of flexible tdi-based polyurethane foams
… of the urethane bond to yield TDI and polyol, whilst the second involves dissociation of the urethane linkages via a six-membered ring transition state to yield diaminotoluene (DAT), CO2 and alkene-terminated polyol chains. The results have shown that the dominant mechanism varies …
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Low Cost Manufacturing and Performance Evaluation of Soy-based Polyurethane/E-glass Composites
… Two-part thermoset polyurethane (PU) contains polyol and isocynate. In the proposed research, soy-based polyol will be used to formulate PU resin. Further, this PU resin will be used to produce E-glass reinforced composites using a low-cost Vacuum Assisted Resin Transfer Molding (VARTM) …
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Characterization of Structure-Property Relationships of Poly(urethane-urea)s for Fiber Applications
… of the molecular weight distribution of the polyol used for soft segments was of foremost interest and had previously been largely neglected during the course of poly(urethane) and poly(urethane-urea) research. It was found that over the range of PUU compositions suitable for production of …
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Surface Functionalized Water-Dispersible Magnetite Nanoparticles: Preparation, Characterization and the Studies of Their Bioapplications
… for disease diagnosis and treatment.</p> <p>Polyol method can be an effective way to prepare magnetite nanoparticles that are suitable for biological applications. In a polyol system, selected surface functionalities were introduced to the nanoparticle surface via a hot injection technique. …
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Controlling Biofouling by Surface Engineering and Molecular Inhibition
… alcohols, and the effect of chirality of these polyol-terminated self-assembled monolayers (SAMs) on resisting protein adsorption. <p> Chapter 3 and 4 presents the results on confining adhered mammalian cell (Swiss 3T3 albino fibroblasts) and bacterial (<em>Escherichia coli</em>) biofilm …
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Synthesis and characterization of cathode catalysts for use in direct methanol fuels cells
In this work a modified polyol method was developed to synthesize in-house catalysts. The method was modified for maximum delivery of product and proved to be quick and efficient as well as cost effective. The series of IH catalysts were characterized using techniques such as UV-vis and FT-IR …
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