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Found 321 Results / Page 22 of 22
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Inhibition of Alzheimer Amyloid Aggregation with Sulfated Glycopolymers
2007 / BiomacromoleculesGlycopolymers carrying sulfated saccharides with modest sugar contents (11% and 28%) were found to suppress the formation of amyloid fibrils by amyloid β peptides (Aβ(1−42), Aβ(1−40), and Aβ(25−35)), as evaluated by thioflavin T assays and atomic force microscopy observation. Circular dichroism spectra showed that the conformat...
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Inhibition of Alzheimer Amyloid Aggregation with Sulfated Glycopolymers
2007 / BiomacromoleculesGlycopolymers carrying sulfated saccharides with modest sugar contents (11% and 28%) were found to suppress the formation of amyloid fibrils by amyloid β peptides (Aβ(1−42), Aβ(1−40), and Aβ(25−35)), as evaluated by thioflavin T assays and atomic force microscopy observation. Circular dichroism spectra showed that the conformat...
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Novel vanadium catalyst system with tartaric acid salts for highly selective asymmetric oxidative coupling polymerization
2007 / PolymerThe asymmetric oxidative coupling polymerization (AOCP) of 2,3-dihydroxynaphthalene (DHN) with a novel catalyst system, oxovanadium(IV) stearate in the presence of the sodium or lithium salt of tartaric acid, under an O2 atmosphere was carried out. For example, the polymerization with a catalytic amount of the d-(−)-tartaric acid disodium salt in THF at room ...
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Optically Active Conjugated Polymers Prepared from Achiral Monomers by Polycondensation in a Chiral Nematic Solvent*
2005 / Angewandte ChemieA chiral polymer resulted from the polycondensation of an achiral monomer in a chiral nematic liquid crystal (N * -LC) as an inert solvent. As an explanation for the chirality of the polymer, the asymmetry produced by the chiral medium during polymerization is suggested.
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Enantioselective Detection of D- and L-Phenylalanine Using Optically Active Polyaniline
2005 / ElectroanalysisChiral conducting polyaniline, which was prepared electrochemically from (+) and (−) camphorsulfonic acid, was utilized for the enantiomeric detection of phenylalanine in neutral phosphate buffer solution. Following electropolymerization the polymer films were dedoped in aqueous ammonia and subsequently shown to maintain their chiral character. The electroche...
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Helicity induction on a poly(phenylacetylene) bearing a phosphonate residue by chiral dendrons
2004 / Journal of Polymer Science Part A: Polymer ChemistryA series of optically active dendrons with a primary amino group at the terminal were prepared fromL- or D-glutamic acid, and their helicity induction abilities for a poly(phenylacetylene) bearing a phosphonate pendant were characterized with ultraviolet–visible and circular dichroism spectroscopy. The magnitude of the Cotton effects of the polymer induced by...
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