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Comparison of several mathematical models for describing the joint effect of temperature and ph on glucanex activity

Authors

  • Miguel Angel Prieto,

    Corresponding author
    1. Grupo de Reciclado e Valorización de Materiais Residuais (REVAL), Instituto de Investigacións Mariñas (CSIC), r/Eduardo Cabello, 6. Vigo-36208, Galicia, Spain
    • Grupo de Reciclado e Valorización de Materiais Residuais (REVAL), Instituto de Investigacións Mariñas (CSIC), r/Eduardo Cabello, 6. Vigo-36208, Galicia, Spain
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  • José Antonio Vázquez,

    1. Grupo de Reciclado e Valorización de Materiais Residuais (REVAL), Instituto de Investigacións Mariñas (CSIC), r/Eduardo Cabello, 6. Vigo-36208, Galicia, Spain
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  • Miguel Anxo Murado

    1. Grupo de Reciclado e Valorización de Materiais Residuais (REVAL), Instituto de Investigacións Mariñas (CSIC), r/Eduardo Cabello, 6. Vigo-36208, Galicia, Spain
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Abstract

The aim of the present work was to evaluate with different statistical criteria the suitability of nine equations for describing and optimizing the simultaneous effect of temperature and pH on glucanex activity using two characteristic polysaccharides (curdlan and laminarin) as substrates. The most satisfactory solutions were found with an empirical equation constituted with parameters of practical interest (Rosso model), and a hybrid model between the Arrhenius equation and the mathematical expression generated by the protonation-hydroxylation mechanism (Tijskens model). The joint optimal values of pH and temperature calculated with the Rosso model were obtained at 4.64 and 50°C with curdlan and 4.64 and 48°C using laminarin as substrate. © 2011 American Institute of Chemical Engineers Biotechnol. Prog., 2012

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