| In vitro: |
| Optics & Laser Technology, 2017, 88:188-193. | | Growth and characterization of butyl 4-hydroxybenzoate single crystal by vertical Bridgman technique for third order nonlinear optical applications[Reference: WebLink] | In order to improve the antimicrobial activity of paper, the antimicrobial activity of the paper manufactured with the kraft pulp which was treated with laccase/buty1 4-hydroxybenzoate was evaluated.
METHODS AND RESULTS:
The experimental results showed that, the handsheet paper containing laccase and Butyl 4-Hydroxybenzoate showed a greater efficiency against the growth of bacteria, which resisted s.aureus, bacillus subtilis, e.coli, salmonella to 94.50%, 90.87%, 98.99%, and 99.12% respectively. There was little change of anti-bacteria effect of the handsheet paper after washing four times, which indicated that the chemical bonds between Butyl 4-Hydroxybenzoate and fibers probably were formed in the presence of laccase.
CONCLUSIONS:
After the enzymatic treatment, kappa number increase compared with the control sample, and the observation of scanning electron microscope(SEM) indicated that fibers treated by laccase and Butyl 4-Hydroxybenzoate were agglutinated together in wide area, which indicated that the phenol compounds may be linked to the surface of fibers by covalent bond to some extent. |
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