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Subject: search.filters.subject.Molecularly imprinted polymers

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    Eco-friendly thermosensitive magnetic-molecularly-imprinted polymer adsorbent in dispersive solid-phase microextraction for gas chromatographic determination of organophosphorus pesticides in fruit samples
    (2024-01-01)
    Seebunrueng, Ketsarin
    ;
    Tamuang, Suparb
    ;
    Jarujamrus, Purim
    ;
    Saengsuwan, Sayant
    ;
    Patdhanagul, Nopbhasinthu
    A thermosensitive magnetic-molecularly-imprinted polymer (TMMIP) was successfully prepared in an aqueous medium. The TMMIP was applied as an effective adsorbent in dispersive solid-phase microextraction for the selective enrichment of five organophosphorus pesticides (OPPs; diazinon, fenitrothion, fenthion, parathion-ethyl, and ethion) before analysis by gas chromatography. The polymerization was performed using mixed-valence iron hydroxide nanoparticles as the magnetic support, N-isopropyl acrylamide as the thermosensitive monomer, ethion as the template, and methacrylic acid as the functional monomer. The adsorption and desorption mechanisms of OPPs depend on their interactions with the adsorbents and solution temperature. Our methodology provides good linearity (0.50–2000 µg L<sup>-1</sup>), with a correlation determination of R<sup>2</sup> > 0.9980, low limit of detection (0.25–0.50 µg L<sup>-1</sup>), low limit of quantitation (0.50–1.50 μg L<sup>−1</sup>), and high precision (%RSD < 7%). The developed method demonstrates excellent applicability for accurately and efficiently determining OPP residuals in fruit and vegetable samples with good recoveries (93–117%).
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    An influenza A virus agglutination test using antibody-like polymers
    (2017-10-13)
    Sukjee, Wannisa
    ;
    Thitithanyanont, Arunee
    ;
    Wiboon-ut, Suwimon
    ;
    Lieberzeit, Peter A.
    ;
    Paul Gleeson, M.
    Antibodies are commonly used in diagnostic routines to identify pathogens. The testing protocols are relatively simple, requiring a certain amount of a specific antibody to detect its corresponding pathogen. Antibody functionality can be mimicked by synthesizing molecularly imprinted polymers (MIPs), i.e. polymers that can selectively recognize a given template structure. Thus, MIPs are sometimes termed ‘plastic antibody (PA)’. In this study, we have synthesized new granular MIPs using influenza A virus templates by precipitation polymerization. The selective binding of influenza A to the MIP particles was assessed and subsequently contrasted with other viruses. The affinities of influenza A virus towards the MIP was estimated based on an agglutination test by measuring the amount of influenza subtypes absorbed onto the MIPs. The MIPs produced using the H1N1 template showed specific reactivity to H1N1 while those produced using H5N1 and H3N2 templates showed cross-reactivity.
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