Effect of soybean oil and glucose on sophorose lipid fermentation by Torulopsis bombicola in continuous culture |
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Authors: | S Y Kim D K Oh K H Lee J H Kim |
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Institution: | (1) Tong Yang Confectionery Co., R&D Center, Seoul 140-715, Korea, KR;(2) Department of Food Science and Technology, Woosuk University, Cheonju 565-800, Korea, KR;(3) Department of Biological Science, Korea Advanced Institute of Science and Technology, Taejon 305-701, Korea, KR |
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Abstract: | The effect of soybean oil and glucose on the growth of Torulopsis bombicola and sophorose lipid production in continuous culture was investigated. As the dilution rate in 100 g/l glucose and 100 g/l
soybean oil medium was increased, the dry cell weight and sophorose lipid concentration decreased. Sophorose lipid productivity,
however, was maximum at a dilution rate of 0.03 h−1. The cell yield from glucose and the sophorose lipid production from soybean oil were approximately constant regardless of
the dilution rate. The specific consumption rate of soybean oil was closely related to the specific production rate of sophorose
lipid. These results suggest that soybean oil was used only for sophorose lipid production whereas glucose was used only for
cell mass and maintenance. When the soybean oil concentration was varied at fixed dilution rate in 100 g/l glucose medium,
a high concentration of soybean oil was found to inhibit sophorose lipid production.
Received: 9 January 1997 / Received revision: 5 March 1997 / Accepted: 13 April 1997 |
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