|
KMID : 1024419970010010022
|
|
Food Engineering Progress
1997 Volume.1 No. 1 p.22 ~ p.28
|
|
|
The Effect of Fermentation Time , Agitation Spped , and Medium Composition on the Characteristics of Growth and Chitosan Production of Mucor rouxii ATCC 24905
|
|
Jung Kyung-Hwa
Kim Hui-Dong
Cho Kyung-Sang
Hur Byung-Ki
|
|
|
Abstract
|
|
|
In the process of fermentation of Mucor rouxii ATCC 24905, the effects of fermentation time, agitation speed,
initial gluαse concentration and N/C (the weight ratio of nitrogen source to carbon source) on the various fermentation characteristics were investigated. The fermentation characteristics considered in this work were the
weight ratio of DCW (dried celJ walJ) to DC (dried celJ), the ratio of chitosan to DCW, the composition of
glucosamine and N-acetylglucosamine, the degree of acetylation, Y XJS (dried cell yield), Y WIS (dried cell waIl
yield), and Y 새 (chitosan yield). The weight ratio of DCW to DC increased to 0.19 with fermentation time up
to 36 hr. The ratio of chitosan to DCW also increased slightly to 0.06 up to 24 hr. The composition of glucosamine and N-acetylglucosamine was constant regardless of fermentation time. In the range from 150 rpm
to 300 rpm, the agitation speed caused the increment of Y“’ YW/S and YPIS’ The weight ratio of DCW to DC
remained 0.185 without the influence of agitation speed. The quantity of chitosan in DCW and that of glucosamine in the chitosan showed the rising trend while the quantity of N-acetylglucosamine in the chitosan exhibited the decreasing trend. The increase in initial glucose concentration induced the reduction of Y)(/S’ Y ，~
and YPIS ’ e weight ratio of DCW to DC was between 0.175 and 0.185 irrespective of initial glucose concentration. On the other hand, the ratio of chitosan 10 DCW rose to 0.43 with the increase in glu se concentration. In the range of lower than 1/8 of N/C, the concenlrations of biomass and chitosan increased with
N/C during fermentation whereas they were found to be unchanged in that of higher than 1/8‘
|
|
|
KEYWORD
|
|
|
degree of acetylation, fermentation characteristics, dried cell wall yield, agiation speed
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|