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  • 11
    Electronic Resource
    Electronic Resource
    Active transport of alkali metal ion through a membrane composed of gluconolactone-containing polymer (1981)
    Springer
    Polymer bulletin 5 (1981), S. 373-377 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The membrane composed of gluconolactone-containing polymer was prepared by the following three steps, (1) the copolymerization between acrylonitrile and a styrene derivative carrying a protected glucose substituent, (2) casting a membrane from the DMF solution of the copolymer, and (3) a sequence of reactions for the membrane. It exhibited active transport of Na+ ion against the concentration gradient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00282686
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  • 12
    Electronic Resource
    Electronic Resource
    Inhibition of Alzheimer Amyloid Aggregation with Sulfate Glycopolymers (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advances in science and technology Vol. 57 (Sept. 2008), p. 166-169 
    Details
    ISSN: 1662-0356
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Natural Sciences in General , Technology
    Notes: Glycopolymers carrying sulfate saccharides were found to suppress the formation ofamyloid fibrils by amyloid beta peptides, as evaluated by fluorescence assay of thioflavin T and AFM.CD spectra showed that the conformation of amyloid beta peptides was changed from beta peptidesdepended on the glycopolymer additives, and that the glycopolymer additives reduced the β-sheetcontents. Neutralization activity was confirmed by in vitro assay with HeLa cells. The sulfate groupand the appropriate sugar contents were essential for the inhibitory effect
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.57.166.pdf
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  • 13
    Electronic Resource
    Electronic Resource
    Simple synthesis of sialyllactose-carrying polystyrene and its binding with influenza virus (1998)
    Springer
    Glycoconjugate journal 15 (1998), S. 1047-1054 
    Details
    ISSN: 1573-4986
    Keywords: glycopolymer ; influenza virus ; sialyllactose ; inhibitor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Glycoconjugate polystyrenes bearing sialyllactose moieties were prepared via a simple method from a mixture of α2-6 and α2-3 linked sialyllactose isomers of bovine milk origin. The reducing end of sialyllactose was converted to an amino function with ammonium hydrogen carbonate and then coupled with p -vinylbenzoyl chloride. The resulting styrene derivative substituted with sialyllactose via an amide linkage was polymerized with ammonium peroxodisulfate and N,N,N,N -tetramethylethylenediamine in water at 30 °C. The interaction of the glycopolymer with influenza A and B viruses was investigated by three different methods. The glycopolymer inhibited the hemagglutination of influenza A virus (PR/8/34) and its activity was 103 times higher than that of the oligosaccharide itself. The cytopathic effect of virus-infected MDCK (Madine-Darby canine kidney) cells was inhibited by the glycopolymer. The homopolymer showed 102 times higher inhibitory activity than naturally-occurring fetuin. It was also found that various viruses could be trapped by the glycopolymer adsorbed on a polystyrene surface. The inhibitory and trapping activities of the glycopolymers were correlated with the sialyl linkage specificities of the virus strains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006960116583
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  • 14
    Electronic Resource
    Electronic Resource
    Permeative separation of metal ions through the polymer membrane containing gluconate group (1978)
    Springer
    Polymer bulletin 1 (1978), S. 121-125 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The adsorption and permeation of metal ion mixtures were examined for the membrane of poly(3-O-vinylbenzyl gluconate-co-acrylonitrile). The membrane is found to be effective for permeative separation of metal ions. For the Cu/Cd combination, especially, Cu ion was selectively adsorbed and permeated in a neutral aqueous solution. The high selectivity and the high permeation rate are discussed in connection with the chelate formation and the hydrophilicity of ion channel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255725
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  • 15
    Electronic Resource
    Electronic Resource
    Synthesis of linear stereoregular glucomannan heteropolysaccharides (1977)
    New York : Wiley-Blackwell
    Biopolymers 16 (1977), S. 415-426 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of stereoregular α-(1 → 6) linked glucomannans have been prepared by Lewis acid-catalyzed copolymerization of anhydro sugar derivatives followed by debenzylation. The products have been characterized for mole fraction of the individual monomer, and sequence lengths have been calculated from copolymerization data. The viscosity, specific rotation, and 13C nmr spectra have been correlated with the structure of the various copolymers.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1977.360160214
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  • 16
    Electronic Resource
    Electronic Resource
    Regioselectively modified stereoregular polysaccharides, 12.Part 11: cf.2. Synthesis of (1→6)-α-linked polysaccharides consisting of D-glucose and 2,3,4-tri-O-octadecyl-D-glucose units (1988)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 189 (1988), S. 1019-1025 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: By ring-opening copolymerization of 1,6-anhydro-2,3,4-tri-O-octadecyl-β-D-glucopyranose (1) with 1,6-anhydro-2,3,4-tri-O-benzyl-β-D-glucopyranose (2) using phosphorus pentafluoride as initiator in dichloromethane at 0°C, stereoregular copolymers 3, with M̄n = 6 · 103 to 24 · 103 were obtained. For debenzylation of copolymers 3, either the reduction with sodium in liquid ammonia or radical bromination-hydrolysis was applied, depending on solubility and copolymer composition. Poly[2,3,4-tri-O-octadecyl-α-D-glucopyranosyl-(1→6)-stat-α-D-glucopyranosyl-(1→6)] (4,) exhibits characteristic solution properties arising from its amphiphilic structure. Polysaccharide 4, with mole fractions of trioctadecylated unit (x) below 0,03, are water-soluble and interact with magnesium 1-anilino-8-naphthalenesulfonate (ANS) in water. The polysaccharide 4 (x = 0,29), which is soluble in chloroform, was found to solubilize an aqueous methyl orange solution in chloroform. Formation of micelles in water and reversed micelles in chloroform is suggested.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1988.021890506
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  • 17
    Electronic Resource
    Electronic Resource
    Synthesis and helix formation of saccharide-poly(L-glutamic acid) conjugates (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1589-1596 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Maltopentaose- and amylose-poly(L-glutamic acid) conjugates were prepared, and the helixcoil transition of their polypeptide main chains was investigated by studying the pH-dependence of CD, optical rotation, and ATR-IR spectra. The maltopentaosylamine was connected to pendant carboxyl groups of poly(L-glutamic acid) via amide linkages using peptide coupling reagents. Phosphorylase-catalyzed polymerization of glucose 1-phosphate onto the maltopentaose-carrying poly(L-glutamic acid) as primer gave poly(L-glutamic acid)-graft-amylose or poly(Amy/Gln-co-Glu). The mole fraction of maltopentaose-substituted units was in a range of 0.02 to 0.52, and the DP of grafted amylose was in a range of 64 to 220. Introduction of maltopentaose residues (mole fraction M5/Gln units: 0.12) stabilized the helix conformation of the poly(L-glutamic acid) main chain, as suggested by the shift of the helix-to-coil transition to pH = 6.1 from pH = 4.5 for poly(L-glutamic acid). The helix conformation was also maintained by introduction of only a small amount of amylose (mole fraction of amylose-substituted units: 0.02), which is corroborated by the presence of the helix amide II band at 1515 cm-1 in the ATR-IR spectrum.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 18
    Electronic Resource
    Electronic Resource
    Structural effect of galactose residue in synthetic glycoconjugates on interaction with rat hepatocytes (1995)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 29 (1995), S. 1557-1565 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: N-p-Vinylbenzyl-O-β-D-galactopyranosyl-(1,4)-D-gluconamide (PVLA) has been used as an asialoglycoprotein model polymer. Rat hepatocytes expressing asialoglycoprotein receptors are capable of binding to hydrophobic plastic dishes coated with PVLA. PVLA, water-soluble polystyrene derivatives bearing galactose residues preferentially adsorb to plastic plates made of polystyrene rather than those of poly(methyl methacrylate). Hence, we modified chitosan beads with linear chains composed of a long alkyl or phenyl moiety to study the effect of structural variations of adsorbed PVLA, and investigated the extent of hepatocyte attachment to the hydrophobic beads coated with PVLA. The attachment was independent of the amount of immobilized PVLA; rather, it was dependent on the hydrophobicity of the beads with PVLA. To simplify the surface of the hydrophobic beads with PVLA, galactopyranoses were covalently linked to chitosan beads via hydrophobic spacer arms, and hepatocyte attachment was compared among the prepared beads. The beads with spacer arms containing phenylalanine and a phthalic moiety showed increased hepatocyte attachment, which was elicited by galactose residues on the beads. These results suggest that rotational restriction or stiffness and hydrophobicity due to the phenyl moiety are essential to enhance the specificity of terminal galactose in PVLA. This analysis contributes to the design and optimization of an artificial ligand for cellular receptors recognizing surgar moieties. © 1995 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820291212
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  • 19
    Electronic Resource
    Electronic Resource
    Copolymerization of anhydroglucose and anhydromannose derivatives: Structure, reactivity, and conformational analyses (1977)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 15 (1977), S. 913-926 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Phosphorus pentafluoride-catalyzed copolymerization of 1,6-anhydro-2,3,4-tri-O-(p-methylbenzyl)-β-D-glucopyranose (TXGL, monomer G) and 1,6-anhydro-2,3,4-tri-O-benzyl-β-D-mannopyranose (TBMN, monomer M) appears to follow classical copolymerization theory. Reactivity ratios calculated by the procedure of Mayo and Lewis were rG = 0.90 ± 0.08, rM = 11.5 ± 0.80, from which sequence distributions were calculated. A conformational analysis of anhydro sugar polymerization is presented to explain differences in reactivity of monomers and their derived cations in polymerization and copolymerization. The polymers and copolymers were characterized by viscosity, 1H- and 13C-NMR spectroscopy, optical rotation, and circular dichroism. The reaction gives stereoregular polymers as have other polymerizations and copolymerizations of this class.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1977.170150413
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  • 20
    Electronic Resource
    Electronic Resource
    Opening mode of acrolein in cationic copolymerization with styrene (1977)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 15 (1977), S. 1503-1506 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1977.170150622
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