Mechanisms for Covalent Immobilization of Horseradish Peroxidase on Ion-Beam-Treated Polyethylene

<table>The ATR-FTIR absorbance intensity due to the 1712 cm<sup>−1</sup> carbonyl line <svg height="7.9499998" id="M30" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 9.1625004 7.9499998" width="9.1625004" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,7.675)"><path d="M509 373q0 -52 -42.5 -118.5t-124.5 -159.5l-94 -107h-27q-22 209 -78 342q-21 48 -41 48q-18 0 -63 -62l-22 21q77 111 125 111q30 0 52 -21.5t38 -75.5q37 -130 52 -285q48 62 74.5 99.5t53.5 87t27 76.5q0 43 -17 60q-5 5 -5 15q0 17 12.5 30.5t28.5 13.5
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</svg>(C<svg height="6.4625001" id="M31" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 10.1 6.4625001" width="10.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,6.4)"><path d="M535 323h-483v50h483v-50zM535 138h-483v50h483v-50z" id="x3D"></path></g>
</svg>O) normalized to the 2917 cm<sup>−1</sup> line of <svg height="7.9499998" id="M32" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 9.1625004 7.9499998" width="9.1625004" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,7.675)"><path d="M509 373q0 -52 -42.5 -118.5t-124.5 -159.5l-94 -107h-27q-22 209 -78 342q-21 48 -41 48q-18 0 -63 -62l-22 21q77 111 125 111q30 0 52 -21.5t38 -75.5q37 -130 52 -285q48 62 74.5 99.5t53.5 87t27 76.5q0 43 -17 60q-5 5 -5 15q0 17 12.5 30.5t28.5 13.5
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</svg>(CH<sub>2</sub>) stretch vibrations of UHMWPE as a function of storage time after PIII treatment for various times of PIII treatment. </table>

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fig7

Figure 7

Figure 7: Mechanisms for Covalent Immobilization of Horseradish Peroxidase on Ion-Beam-Treated Polyethylene 