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Covalent immobilization of lysozyme in silicone rubber modified by easy chemical grafting

Published online by Cambridge University Press:  16 October 2017

G. G. Flores-Rojas*
Affiliation:
Departamento de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México CDMX 04510, México Nano Medical Engineering Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
F. López-Saucedo
Affiliation:
Departamento de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México CDMX 04510, México
E. Bucio*
Affiliation:
Departamento de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México CDMX 04510, México
T. Isoshima
Affiliation:
Nano Medical Engineering Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
*
Address all correspondence to G. G. Flores-Rojas at [email protected] and E. Bucio at [email protected]
Address all correspondence to G. G. Flores-Rojas at [email protected] and E. Bucio at [email protected]
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Abstract

Functionalization of silicone rubber films with lysozyme was achieved by grafting copolymerization and its chemical activation allowing the covalent immobilization of the enzyme. The new materials were characterized by means of Fourier-transform infrared spectroscopy, differential scanning calorimetry, thermogravimetric analysis, contact angle, atomic force microscopy, and mechanical properties of films. The enzymatic activity of films was studied by a suspension of lyophilized Micrococcus lysodeikticus. The activity test was inquired at different pH and temperatures, exhibiting enzymatic activity 20 °C above the free lysozyme, and at pH = 5 where the free lysozyme did not show activity.

Type
Research Letters
Copyright
Copyright © Materials Research Society 2017 

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