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  1. Article: Carboxymethyl guar gum synthesis in homogeneous phase and macroporous 3D scaffolds design for tissue engineering

    Kundu, Sonia / Aalok Basu / Aatrayee Das / Arup Mukherjee / Debjani Ghosh / Pallab Datta

    Carbohydrate polymers. 2018 July 01, v. 191

    2018  

    Abstract: Guar gum (GG) is a galactomannan obtained directly from the Cyamopsis tetragonoloba seeds pericarb. The biopolymer hydrates hugely in three chain associated coil formations. Chaotropic Hofmeister ion like lithium interacts at the hydrogen bonding sites ... ...

    Abstract Guar gum (GG) is a galactomannan obtained directly from the Cyamopsis tetragonoloba seeds pericarb. The biopolymer hydrates hugely in three chain associated coil formations. Chaotropic Hofmeister ion like lithium interacts at the hydrogen bonding sites and render GG homogenization in polar solvents like dimethyl sulfoxide. This phenomenon was used for the first time for galactomannan derivatisations in homogeneous phase. Higher degree of substitution (DS) that was hereto unattainable in GG was achieved due to Hofmeister ion assisted assembly deformations. Furthermore, carboxymethyl guar gum (CMGG, DS = 1.10) blends well in poly-vinyl alcohol (PVA) at 2:1 mass ratio and enabled hydrophilic porous scaffold design for cell propagation. CMGG-PVA scaffolds porosity was 70–90% and the tensile strength was 6.32 MPa. CMGG-PVA scaffolds were useful as cell factories and in tissue engineering. New generation guar gum derivative scaffolds were non cytotoxic and permitted cell propagation in growth medium.
    Keywords alcohols ; biopolymers ; culture media ; Cyamopsis tetragonoloba ; cytotoxicity ; deformation ; dimethyl sulfoxide ; galactomannans ; guar gum ; homogenization ; hydrogen bonding ; hydrophilicity ; lithium ; mixing ; porosity ; porous media ; seeds ; solvents ; tensile strength ; tissue engineering
    Language English
    Dates of publication 2018-0701
    Size p. 71-78.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 1501516-6
    ISSN 1879-1344 ; 0144-8617
    ISSN (online) 1879-1344
    ISSN 0144-8617
    DOI 10.1016/j.carbpol.2018.03.007
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Guar gum benzoate nanoparticle reinforced gelatin films for enhanced thermal insulation, mechanical and antimicrobial properties

    Kundu, Sonia / Aalok Basu / Aatrayee Das / Arup Mukherjee / Md. Farooque Abdullah

    Carbohydrate polymers. 2017 Aug. 15, v. 170

    2017  

    Abstract: This work relates to guar gum benzoate self assembly nanoparticles synthesis and nano composite films development with gelatin. Guar gum benzoate was synthesized in a Hofmeister cation guided homogeneous phase reaction. Self assembly polysaccharide ... ...

    Abstract This work relates to guar gum benzoate self assembly nanoparticles synthesis and nano composite films development with gelatin. Guar gum benzoate was synthesized in a Hofmeister cation guided homogeneous phase reaction. Self assembly polysaccharide nanoparticles were prepared in solvent displacement technique. Electron microscopy and DLS study confirmed uniform quasi spherical nanoparticles with ζ-potential − 28.7mV. Nanocomposite films were further developed in gelatin matrix. The film capacity augmenting due to nanoparticles incorporation was noteworthy. Superior barrier properties, reinforcing and thermal insulation effects were observed in films dispersed with 20% w/w nanoparticles. Detailed FTIR studies and thermal analysis confirmed nanoparticles interactions in the film matrix. The nanocomposite film water vapour permeability was at 0.75gmm−1kPa−1h−1, thermal conductivity 0.39Wm−1K−1 and the tensile strength were recorded at 3.87MPa. The final film expressed excellent antimicrobial properties against water born gram negative and gram positive bacteria.
    Keywords antibacterial properties ; cations ; electron microscopy ; films (materials) ; Fourier transform infrared spectroscopy ; gelatin ; Gram-positive bacteria ; guar gum ; insulating materials ; nanocomposites ; nanoparticles ; permeability ; solvents ; tensile strength ; thermal analysis ; thermal conductivity ; water vapor ; zeta potential
    Language English
    Dates of publication 2017-0815
    Size p. 89-98.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 1501516-6
    ISSN 1879-1344 ; 0144-8617
    ISSN (online) 1879-1344
    ISSN 0144-8617
    DOI 10.1016/j.carbpol.2017.04.056
    Database NAL-Catalogue (AGRICOLA)

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    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

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