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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 24 for “"carboxylic groups"”.
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Synthesis of functional polyimide and its application in nanostructured films
A functional polyimide with pendant carboxylic groups has been synthesized and modified with dendrimer wedges. The effect of dendrimer wedges in formation of porous structure in bulk film was investigated. Lower density and higher extend of butanol intrusion of the modified polyimide bulk film …
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Inkjet printing multifunctional chromatic sensors and chromism study
… by the formation of chelation between the carboxylic groups on side chain of diacetylene and Zn ion. The thermochromatic transition temperature increases with the concentration of ZnO. Thin films of polydiacetylene (PDAs) and PDA/ZnO nanocomposites have been successfully fabricated by …
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Removal of Per- and Poly-fluoroalkyl Substances (PFAS) from Water: A Computational Approach
… governed by interactions between functional head groups and the adsorbent, with protonated sulfonic groups exhibiting stronger adsorption than carboxylic groups. On Ni surfaces, adsorption is most favorable on the (110) facet and enhanced by vacancy defects, while pre-adsorbed hydrogen reduces …
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The development of chemically engineered pullulan for drug delivery
… amine functionalized molecules onto the carboxylic groups of CMP, using the coupling agent dicyclohexylcarbodiimide. The amines used in this modification step were: hexadecylamine, decylamine, cadaverine (1-5 diaminopentane), and three jeffamine® (polyoxypropylenediamine) compounds of …
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Synthesis and characterization of ultra violet curable renewable polymer graphite composites
… that the graphite particles contain functional groups such as hydroxyl and carboxylic groups are randomly distributed and attributed to formation of interconnected interface within the polymeric composites. Furthermore, as the graphite particle loading increased, the thermal degradation …
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New Segmented Block Copolymers Based on Hard and Soft Segments Using Selectively Reacting Bifunctional Coupling Agents
… have one oxazoline group that reacts with carboxylic groups and one oxazinone group that reacts with hydroxyl or amino groups. It was intended to synthesize segmented block copolymers by combination of amino or hydroxyl terminated pre-polymers and carboxylic terminated chain extenders using …
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Changes in the structure of SW30HR RO membrane exposed to chloraminated seawater and synthetic solutions
… the effect of active layer-bound halogens on carboxylic group accessibility. Cesium (Cs+), silver (Ag+), and barium (Ba2+) were used as ion probes to quantify the changes associated with membranes exposed to three different batch reactor conditions (1) seawater with 2 ppm NH2Cl; (2) phosphate …
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The Influence of Oxyanions on the EDTA-Promoted Dissolution of Goethite
… at 0.1 mM. EDTA adsorbs but the number of carboxylic groups that can sorb to the surface is reduced causing the formation of mononuclear complexes. This shift from multi- to mononuclear surface complexes enhances the EDTA-promoted dissolution of goethite in the presence of the oxyanions …
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Solution and solid state NMR studies of fluorine tagging reagents
… compounds containing active hydrogen functional groups (e.g., hydroxyl, amine, thiol, and carboxylic groups). The existence of these derivatized functional groups is determined by utilizing a number of solution and solid-state nuclear magnetic resonance (NMR) techniques. In solution NMR studies …
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Synthesis and Characterization of Graphene-Polymer Nanocomposites via Reversible Addition-Fragmentation Chain-Transfer Polymerization
… possible as polydopamine has available hydroxyl groups that can react with carboxylic groups of the RAFT agent via ester linkages. During the formation of polydopamine coating on graphene oxide, graphene oxide can be simultaneously reduced by the released electrons generated by …
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Compuestos emisivos de Pt(II) e Ir(III) con aplicaciones biológicas y en iluminación de estado sólido
… and Ir(III) compounds with cyclometallated groups derived from 2- phenylpyridine. Thus, this work presents a series of compounds of the [Pt(C^N)(C6F5)(L)] type (L = DMSO or bioactive phosphines), showing that the presence of phosphines with carboxylic groups enhances the cytotoxic activity, …
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Green synthesis, characterization and laser irradiation of silver nanoparticles and its bimetallic nanoparticles
… extract and AgNPs to indicate that the amino and carboxylic groups are responsible for the formation of AgNPs. The results of FESEM revealed that the Gre-Ag NPs have a spherical shape with diameter parameters between 10 and 80 nm, and XRD appeared that the Gre-Ag NPs have crystalline properties. …
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FTIR-ATR Characterization of Hydrogel, Polymer Films, Protein Immobilization and Benzotriazole Adsorption on Copper Surface
… glycidyl methacrylate which have both amine and carboxylic groups are used as solid surface for the immobilization of bovine serum albumin (BSA). Pulsed plasma polymerization was used to polymerize these monomers with different duty cycles. Initial works in this field were all about protein …
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Fabrication of DNA microarrays on Poly (methylmethacrylate) substrates for biomolecular reporting
… which produces functional scaffolds of carboxylic groups that allow covalent attachment of amine-terminated oligonucleotide probes onto these surfaces via carbodiimide coupling chemistries. The photo-modification process for microarray fabrication involves only three steps; (1) broadband …
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Stability and precipitation of diverse nanoparticles
… mono and divalent salts. Also, the formation of carboxylic groups on the DND surface does not alter colloidal behavior as dramatically as it does for other nanocarbons especially carbon nanotubes. Formation of colloidal dispersions via precipitation processes has been widely used in the chemical …
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Biological adhesion in wet environments: adaptations and mechanisms
… which is chemically stable and contains carboxylic groups for strong interactions. Glucurono-mannan are an understudied group of plant polysaccharides that are present in mucilaginous secretions from across the plant kingdom, including sticky capture fluids from other carnivorous plants. …
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Influence of wood on the pyrolysis of poultry litter
… alcohols, phenols, aromatic ethers, and carbonyl/carboxylic groups into the oil. TG/DTG analysis also showed that the thermal decomposition of the oils were different depending on the amount and the type of wood in the manure/wood mixture. The parametric variables used for the mixture of 50% …
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Aluminium stabilizes dissolved organic matter by precipitation
… of aromatic compounds and enrichment of carboxylic C in precipitated OM, being associated by depletion in N and enrichment in P. The type of bonds between OM functional groups and the Al cations was independent of pH, Al/C ratios and solution composition. FTIR spectra indicated ligand …
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Synthesis of reponsive homo- and block copolymers - application to the generation of inorganic-organic nanohybrids
… by amidification at elevated temperatures of the carboxylic moieties via a trifunctional primary amine, the structure was found to remain even after cooling down the system. The shell-cross-linked micelles formed were utilized to generate inorganic-organic nanohybrids by the in situ reduction of …
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Development of hot-melt extrusion as a novel technique for the formulation of oral solid dosage forms
… drug-polymer interactions between the functional groups of both components (cationic drugs–anionic polymers). Furthermore, the intermolecular interactions evaluated by Flory-Huggins interaction parameters theory and X-ray photoelectron spectroscopy (XPS) showed stronger interactions between …
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