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.
Results
Showing 1 to 20 of 69 for “"Amine groups"”.
-
Mesoporous Functionalized Materials for Post-Combustion Carbon Dioxide Capture.
… of bis[3-(trimethoxysilyl)propyl]amine in presence of cationic and anionic surfactants. Reaction media strongly affected gelation time. Thus, in basic media gelation occurred immediately while acid increased gelation time. Material structures were studied by IR spectroscopy, …
-
Chemical Surface Modification of Polycarbonate to Increase Hydrophilicity
… altered the appearance of polycarbonate. Amines qualitatively reduced the contact angle when compared to untreated polycarbonate. p-Phenylenediamine (PPD) is an aromatic amine commonly used in hair dyes. Polycarbonate was submerged in PPD solution, heated, rinsed in DI water, and dried …
-
Synthesis, Characterisation and Antifungal Activity of Copper(II)-Functionalised Silicone Polymers and Silicone-Coated Magnetic Nanoparticles
Two families of amine-functionalised silicone polymers were prepared using monomeric (3-aminopropyl)triethoxysilane (APTES) and (3-trimethoxysilylpropyl)diethylene triamine (TMSPDT). Schiff base derivatives of these polymers were synthesised using salicylaldehyde. The same suite of polymers were …
-
Carbon dioxide sensing with 2D conductive metal-organic frameworks
… conductive metal-organic frameworks (MOFs) with amine-based linkers. The 2D MOFs studied here show carbon dioxide sensitivity at concentrations as low as 1000 ppm. The identity of both the metal and ligand affects sensing performance in terms of sensitivity, reversibility, selectivity, and …
-
Incorporation of charged polysaccharide binders to improve capacitive deionization performance
… and carboxymethyl cellulose (CMC), are examined for their potential to improve CDI charge efficiency as anodic and cathodic binders, respectively. The amine groups of chitosan (pKa ~6.3) and carboxylic acid groups of CMC (pKa ~3) can be simultaneously protonated and deprotonated, …
-
Influence of basicity in Fischer-Tropsch synthesis over supported iron-based catalysts
… a silica-based basic support by attaching basic groups to the silica. In this study iron Fischer-Tropsch catalysts supported on silica were tested for conversion of synthesis gas to hydrocarbon products. Silica was modified with aminopropyltriethoxysilane (APTeS) by impregnation followed by …
-
Silica based immunoassays for a covalently attached antigen
… and modified with 3-aminopropyltriethoxysilane. Amine groups on the modified slides and beads were used for carbodiimide mediated coupling to carboxyl groups on a peptide antigen. High surface concentrations of antigen were achieved. Antibody binding to the antigen-modified beads and slides was …
-
Investigation of Distribution and Transport of CO2 in Polyimine/MCM-41 Hybrid System: Modeling and Simulation Approach
… describe interactions between CO2, water, amine groups, and silica surfaces, alongside characterizing CO2 distribution and movement through pair correlation and mean-square displacement analyses. The study is set to provide significant insights into the enhancement of CO2 capture within …
-
Properties modification of nanopatterned surfaces functionalized with photo activated ligands
… their surface adhesion properties. Poly (allylamine hydrochloride) (PAH), and poly (styrene sulfonate) (PSS) are a very well-studied system of polyelectrolytes for LbL deposition. ISAM films built from those polyelectrolytes are rich in amine groups to which nanoparticles, cells, tissue …
-
Comparison of Supported Liquid Extraction and Solid Phase Extraction of Methamphetamine from Urine and Method Validation by Gas Chromatography-Mass Spectrometry
… efficiencies between SLE and SPE for methamphetamine from urine with detection and quantitation using GC-MS (gas chromatography- mass spectrometry). The SLE cartridges provide better analyte recoveries, eliminate emulsion formation, and allow for shorter processing time than other extraction …
-
Color and Structural Modifications of Alkaline Extracted Sunflower Protein Concentrates and Isolates Using L-Cysteine and Glutathione
… acid (CGA) oxidizes and reacts with free amine groups from amino acids, such as lysine. Thiol-containing dough conditioners: L-cysteine hydrochloride and reduced glutathione (GSH) were investigated as an alternative de-greening strategy to de-phenolization. Varying pH from 7 to 11 and …
-
Biological applications of weal polyelectrolyte multilayers
… polymers - polyacrylic acid (PAA), poly(allylamine hydrochloride) (PAH), polyacrylamide (PAAm). The first part of this thesis focuses on patterning polyelectrolyte multilayers found to resist mammalian cell adhesion, with ligands that promote specific interactions for adhesion. It was found …
-
Degradação termocatalítica de misturas de poliolefinas e biomassa
… was obtained at the 2/1 ratio. The main cheminal groups formed were acid, furan and amine groups. Thepyrolysis of polyolefins carried out with the catalysts SO4/SnO2_3x and H-ZSM-5 at 3/1, 2/1 and 1/1 ratios,evaluated the effects of each catalyst on the collected products yields. The SO4/SnO2_3x …
-
Surface Tethered PAMAM Dendrimers On Controlled Pore Glass As Color Release Sensors For Phosphates
<p>Poly(amidoamine) dendrimer (PAMAM) are highly branched macromolecules with reactive amine groups in their interior and exterior. PAMAM dendrimers were attached to controlled pore glass (CPG) surfaces in order to create new functionalized surfaces and used as platforms for UV-vis and fluorescent …
-
pH-sensitive core-shell nanoparticles for intracellular drug delivery
… 200 nm in diameter. The protonation of tertiary amine groups on the polyDEAEMA core on moving from extracellular to endolysosomal pH resulted in reversible swelling of the nanoparticles with a 2.8-fold diameter change. With the aid of pH-sensitivity of these nanoparticles, efficient cytosolic …
-
Targeted and stimuli-responsive polymers as chemotherapeutic delivery systems
… agents and targeting moieties with free amine groups. In cell culture studies on target hepatocytes, the dextran-doxorubicin-galactose (DDG) conjugates showed lower toxicity compared to doxorubicin, increased toxicity with higher molecular weight polymers, and greater toxicity with higher …
-
Engineering of the RTB Lectin as a Carrier Platform for Proteins and Antigens
… to endocytosis. The galactose/N-acetyl-galactosamine specific lectin ricin B-chain (RTB) is especially attractive in possibly fulfilling a carrier role due to its well-characterized endocytotic trafficking and its efficacy over a wide range of cell types. By producing RTB recombinantly in plants …
-
Cell Wall/Surface Proteome of Candida albicans: its Application in Rapid Identification of Yeast Species by Mass Signature and Characterization by in vitro and in vivo Chemical Labelings
… Fluorous labeling reagents that target primary amine groups in proteins/peptides were synthesized and characterized. The acid labile linker in the labeling reagents allows cleavage of the bulky fluorous tag moiety and the long oligo ethylene glycol (OEG) spacer after fluorous affinity …
-
Development of new dendritic ligands for copper mediated Atom Transfer Radical Polymerization (ATRP) of methyl methacrylate
… functionalized dendrimers. Analogous secondary amine functionalized dendrimers were also synthesized by reducing the abovementioned imine functionalized dendrimers using sodium borohydride. The ligands produced were characterized by 13C / 1H NMR, and infra-red spectroscopy as well as elemental …
-
Dendrimer Based Nanotherapeutics For Ocular Drug Delivery
… <p>G4-OH was modified with linker having minimal amine groups and incorporation of TA as a nuclear localization enhancer resulted in compact gene vectors with favorable safety profile and achieved high levels of transgene expression in hard to transfect human retinal pigment epithelial cells …
Page 1 of 4