Effect of triton X-100 on compactin production fromPenicillium citrinum

被引:0
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作者
DuBok Choi
KiAn Cho
Wol Suk Cha
Seong Ryeol Ryu
机构
[1] Cho-dang University,Department of Environmental Engineering
[2] Chosun University,Department of Chemical Engineering
[3] Dae Bul University,Department of Chemical Engineering
关键词
compactin; surfactant; Triton X-100; oxygen uptake rate;
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学科分类号
摘要
Glucose alone was found to be the most effective carbon source for producing compactin. An initial glucose concentration of 40 g/L gave the highest compactin concentration of 250 mg/L. Among the various nitrogen sources, when 5 g/L of pharmamedia and soybean meal as the sole nitrogen source were used, respectively, the compactin concentration was higher than 250 mg/L. Especially, in the case of the mixture of 6 g/L of pharmamedia and 8 g/L of soybean meal, the compactin concentration was 400 mg/L. To select the best surfactant for effective compactin production, various surfactants were investigated. When Triton X-100 was used, the maximum compactin concentration was 445 mg/L. With the initial concentration ranging from 1.5 to 2.0 g/L, the compactin concentration was the highest at 465–450 g/L. The cell concentration was similar to that of the control without the addition of Triton X-100. On the other hand, when the above 4.0 g/L of Triton X-100 were used, the cell concentration decreased. Using the based results the continuous fed-batch cultures by adding the Triton X-100 were carried out for 10 days in an air-lift bioreactor. When 1.5 g/L of Triton X-100 was added to the culture broth at 0, 4, and 8 days of culture, respectively, the compactin production was increased with the increase of culture time. The maximum compactin concentration after 10 days of culture was 1,200 mg/L, which was about 2.0-fold higher than that of the control without the addition of Triton X-100.
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页码:171 / 178
页数:7
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