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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 61 for “"covalent bonding"”.
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The Study of Covalent-Bonding by Means of Elastic-Constants
Made available in DSpace on 2015-05-12T22:38:56Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7317537.PDF: 3078500 bytes, checksum: cfec3917fb5d58c848ab69836382c6d3 (MD5) Previous issue date: 1973
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The study of covalent bonding by means of elastic constants
Submitted by Yan Wang (yanwang3@illinois.edu) on 2010-07-09T20:33:47Z No. of bitstreams: 1 1973_fuller.pdf: 3223081 bytes, checksum: 81cece042a2eb8473bee6b0a47b0a18e (MD5)
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Factors affecting the thrombin inhibiting activity of heparin when immobilised to hydrogels by covalent bonding
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Applied Biological Sciences, 1986.
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Basic studies of the cross-linking reaction of collagen with oxazolidine and plant polyphenols
… tanning can be explained as an effect of covalent bonding, hydrogen bonding and hydrophobic bonding together, but the high shrinkage temperature is mainly due to the covalent bonding forming a complex matrix structure around the collagen fibres
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Electrostatic Analysis of Nanoelectromechanical Systems
… bandstructure of graphene. This is caused by the covalent bonding formed by C and surface Si atoms, which changes the pi-band network of the graphene layer. The dispersion curves and density of states calculations show that the bonded Si-C surface states are highly delocalized and located near the …
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Single wall carbon nanotubes as viscosity modifiers in polypropylene matrix nanocomposites
… the surrounding polymer chains, facilitate the covalent bonding of nanotubes directly to the polypropylene chains. These covalently bonded nanotubes were then forced to align themselves, along with the polymer chains when the bulk composite is spun into a small diameter fiber (dia.130mum). …
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Phenolic reactions for leather tanning and dyeing
… of collagen was raised to 80°C through hydrogen bonding interactions between the polymers and the protein. For dyeing of hide powder, the lignin degradation products were reacted with laccase (a polyphenol oxidase); 2-methoxyphenol gave the darkest colour. These products have potential to be used …
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Modification of thin film composite (TFC) membrane by incorporation with copper nanoparticles (Cu-NPs) for antibacterial properties
… via either electrostatic interactions or by covalent bonding with cysteamine as a linker. The electrostatic method was simply to immerse the newly made TFC membranes to the Cu-NPs suspension. Since the CTAB had formed cationic bilayer outside the Cu-NPs, the Cu-NPs was not only adsorbed on …
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A study of the nature and origin of the minialbumins to be found in cadmium-poisoned animals
… determined solely by size and electrostatic and covalent bonding forces.s Cadmium chloride shows octahedral co-ordination.
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Planar Orbital Method for Surface Electronic Structures
… in the As-Si bonds. And the strong polar covalent bonding between surface As atoms and underlying Si atoms may be responsible for the stability of the As/Si(001) surface. A pathway was found for the desorption of H2 molecules from the Si(001) 2 x 1 surface in which the activation energy …
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Studies on biotin as a coenzyme of propionyl carboxylase
… likely contains an enzyme which catalyzes the covalent bonding or d-biotin to propionyl apocarboxylase and other proteins. In order to measure the activity of the propionyl holocarboxylase synthesizing system, two assay procedures were used. One assay procedure employed the incorporation of …
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Propionyl holocarboxylase synthesis
… which contains an enzyme which catalyzes the covalent bonding of d-biotin to propionyl apocarboxylase. The propionyl holocarboxylase synthesis catalyzed by these enzyme systems is irreversible and d·biotin specific. The gel supernatant has been further purified by hydroxyapatite chromatography …
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Design and characterization of aromatic thermosetting copolyester resin for polymer matrix nanocomposites
… functional groups, which establishes covalent bonding with cure advancing crosslinking polymer network and modifies the glass transition region characteristics. The aromatic resin forms an interfacial liquid crystalline mesophase domain around graphene nanoplatelets, which uniquely …
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INVESTIGATION OF CHELATING DYE IMPREGNATED RESINS FOR THE SELECTIVE ADSORPTION AND SEPARATION OF TRACE METALS FROM AQUEOUS SOLUTIONS
… were modified with chelating dyes by either covalent bonding or physical adsorption respectively. Large particle size polystyrene resins were used for preliminary investigations of dye loading and metal retaining capacities. After crushing resins to an intermediate particle size, capacity …
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Engineering polymeric hollow fiber membrane reactors for sustainable chemical transformation reactions
… of organic or metal nanoparticle catalysts by covalent bonding within highly swelling-resistant asymmetric polymeric hollow fiber surfaces for non-leaching catalysis. This novel hollow fiber membrane reactor was used as a heterogeneous catalyst and continuous-flow reactor for various reactions …
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The statistical mechanics of continuous random networks
Under sufficient permanent random covalent bonding, a fluid of atoms or small molecules is transformed into an amorphous solid network. Being amorphous, local structural properties in such networks vary across the sample. A natural order parameter, resulting from a statistical-mechanical approach, …
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High temperature studies of sodalites
… atoms. This can be attributed to the increased covalent bonding in an Ag-X bond vs. a Na-X bond. High temperature X-ray powder diffraction studies were then carried out on these systems and it was found that they all displayed positive thermal expansion from room temperature up to 822ºC. The …
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Semiconductor nanocrystal composite materials and devices
… systems: ligand polymers, ligand monomer and covalent bonding to a polymer matrix, and in-situ polymerization. The best composite system is based on incorporation of QDs into a poly(laurylmethacrylate) matrix during in-situ polymerization in the presence of TOP ligands. The successful …
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Electroplated composite coatings with incorporated nano particles for tribological systems with the focus on water lubrication
… of dispersive part of surface energy indicating covalent bonding between surface and liquids.
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