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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 29 for “"polyanions"”.
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A study of polyelectrolyte complexes with dynamic light scattering
… of copolymers formed from the reaction between polyanions and polycations (PE's) in polar solvents.
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B CELL EPITOPE MAPPING OF RIVAX, A CANDIDATE RICIN VACCINE ANTIGEN
… interest. Studies have shown that several polyanions (sulfated and phosphorylated) have increased the thermal stability of FGF-1 by 15-30oC. In this study, we sought to identify the binding sites of the polyanions. In particular, we studied two sulfated (heparin, low MW heparin) and two …
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Crystallographic Studies of Cation-Glucuronic Acid Interactions: Structures of Calcium-Bromide Glucuronate and Sodium Glucuronate.
… and calcium cations to chondroitin sulfate polyanions.
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Nano-Confined Room-Temperature Ionic Liquids for Electrochemical Applications
… The invention of ion gels featuring aligned polyanions immersed inside RTILs has shown promise in meeting this demand, but the mechanism behind their superior mechanical strength remains elusive. Using molecular simulations, it is discovered that the high elastic moduli of model PBDT ion gels …
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Synthesis and Solution Properties of Semi-rigid Polyelectrolytes and Polyampholytes
… length measurements reveal that carboxylated polyanions containing stilbene and maleic acid remain semi-rigid in aqueous solutions. It was found that these semi-rigid polyanions exhibited excellent anti-HIV activity possibly due to their more extended polymer chains. This was the first time …
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Polyoxometalate self-assembly : from molecules to framework materials
… (TMSPs), with particular emphasis on polyanions based on the Keggin structure and lacunary derivatives thereof. In particular, an understanding is gained into the role that N,N’-bis(2-hydroxyethyl)piperazine (bhep) and morpholine (morph) play in the polyanion self-assembly process, …
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Sterically Crowded Copolymers Based on Functionalized Stilbenes
… solution characterization of stilbene containing polyanions, a 2-step dissociation behavior was observed for the two adjacent carboxylic acids in maleic acid containing polyanions. Stilbene polyanion solutions showed high Rh values in deionized water as shown by DLS measurements and a decrease of …
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Molecular Structure and Dynamics of Novel Polymer Electrolytes Featuring Coulombic Liquids
… and dynamics of an ion gel consisting of PBDT polyanions and room-temperature ionic liquids (RTIL) were studied. First, a semi-coarse-grained model was developed to investigate the packing and dynamics of the ions in this ion gel. Ions in the interstitial space between polyanions exhibit …
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Synthesis and characterization of ring-opening metathesis polymers with pendant carborane groups
… as precursors and models for the synthesis of polyanions with pendant cobalt dicarbollide (Co(C2B9H)2 -l) and carborane anion (CB1 H12-) groups via ROMP. These polyelectrolytes were found to work as hydrophilic ion-exchangers in aqueous acidic solutions. Polymers functionalized with either …
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Polyphosphate and tissue factor/factor VIIA as initiators of coagulation
… the reaction-by-reaction effects of physiologic polyanions, I performed a series of activity assays with purified proteins of the contact pathway. These assays were run in the presence of polyanions, and in some experiments HK. The results demonstrate the disparate effects of polyanions and HK, …
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Junctions and Strands: Breaking Property Tradeoffs in Polymer Networks and Composite Polymer Electrolytes
… constitute the first regular microporous polyanions, and the most dissociative microporous polyanions to date. These polymers, alongside other rigid (but not microporous) polysulfonimides enable strong conductivity performance when coupled with suitable dopant (here succinonitrile) in low …
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Studying and controlling chromophore orientation in polyelectrolyte layer-by-layer thin films
… processing study, two side-chain chromophoric polyanions were used. One, PolyS 119, contained sulfonic acid groups while the other, PAZO, contained carboxylic acid groups. These were assembled with four polyamines. The pH of the polyanion solutions was varied to observe its effect on …
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Synthesis and characterization of molybdenum and vanadium framework materials
… compounds. These include three distinct cluster polyanions in addition to a ribbon structure type. The effect of fluoride ions into the synthesis of molybdenum phosphates has been investigated; this approach has led to the discovery of a new oxyfluorinated molybdenum phosphate compound templated …
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Characterization of Phagosome-Lysosome Fusion in Macrophages
… and concentrated in secondary lysosomes. Polyanions did not inhibit pinosome-lysosome fusion, as assayed by the intracellular degradation of a pinocytic marker, by electron microscopy, and by monitoring the transfer of a pinocytic marker to a lysosome-enriched fraction obtained from …
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Differential modulation of HIV-1 capsid uncoating kinetics revealed by a novel single-particle uncoating assay
… the remaining lattice. In contrast, binding of polyanions to the central capsid pore, such as hexacarboxybenzene and the newly discovered CA-binders IP6 and ATP, strongly delay initiation of uncoating but do not prevent subsequent lattice disassembly. We also determined that CPSF6 binds the …
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Cellular uptake and biological activity of synthetic hammerhead ribozymes
… process that could be competed with a variety of polyanions. Indications are that the predominant mechanism of uptake is by adsorptive and / or receptor mediated endocytosis. Twenty 2'-O-methylated chimeric ribozymes were designed to cleave various sites along the EGFr mRNA. In vitro, 18 ribozymes …
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Polymer Electrolyte Discovery via Rational Design and High Throughput Methods
… ("FAST”) anion monomers. These polyanions form well-ordered lamellae that are thermally stable and provide anionic channels for ion hopping. Electrochemical impedance spectroscopy and differential scanning calorimetry experiments, along with nudged elastic band calculations, …
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Solubilisation of organic compounds of different polarity by interpolyelectrolyte complexes based on copolymer micelles
… In this work, the molecular architecture of polyanions was designed through the atom transfer radical polymerization (ATRP). IPEC of oppositely charged polydiallyldimethylammonium chloride (PDADMAC) and sodium polyacrylate (NaPA) were studied under variation of the Mw of PDADMAC. The effect …
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Polysaccharide-based nanostructures for growth factor delivery and mesenchymal stem cell activation
… chitosan and N,N,N -trimethyl chitosan, and the polyanions hyaluronan, chondroitin sulfate, and heparin. An exhaustive spectroscopic study was performed on all of the PEMs pairs to investigate the effects of polyelectrolyte charge density on thickness, swelling, composition, and ion-pairing. The …
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Studies of multicomponent assemblies
… to detect and identify various polyanions at a low micromolar concentration. The system was able to successfully differentiate twelve anions, many of biological interest, including three tricarboxylates. The tricarboxylates were differentiated based primarily on the …
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