| dc.description.abstract | Acetobacter xylinum is a bacterium that produces microbial cellulose which has
been commonly used in several industries factory such as food industry, paper,
electronics, pharmacy, and biomedical. Study about the effects of ammonium
sulphate and sucrose addition into coconut water media on the production and
physical characteristics of microbial cellulose by Acetobacter xylinum has been
conducted. Ammonium sulphate were 0, 0.5, 1 and 1.5 % which were combined
with 0, 2, 4, 6 % of sucrose. The cultures were growth for three days. Microbial
cellulose of each treatments was analysed based on the physical properties such as
rendemen, thickness, water content and tensile strength . The higher sucrose
concentration added to the medium, the better production and physical
characteristics of microbial cellulose. Concentration of ammonium sulphate 1 %
was produce the best quality of microbial cellulose, while 1.5 % decreased the
production and the quality of microbial cellulose. The highest rendemen,
thickness, water content and the tensile strength of microbial cellulose was 31.23
%, 8.77 mm, 95.54 %, 3.234 MPa, respectively. The combination treatment of 1
% ammonium sulphate and 6 % of sucrose produced the best value of rendemen,
thickness, water content and the tensile strength. However statistical test showed
that there were no significant different among the treatment. | en_US |
