EFFECTS OF CULTURE CONDITIONS ON FERMENTATION OF PENTOSE BY PICHIA STIPITIS
Shiyuan Yu
Abstract
Shiyuan Yu
Abstract
Effects of culture condition,including nitrogen source,pH value and temperature on pentose(mainly (xylose)) fermentation by Pichia stipitis P_2 were investigated.Both growth and xylose fermentation were as good with (urea) as a sole nitrogen source as with peptone as a sole nitrogen source.The optimum pH value and temperature range of the growth of Pichia stipitis P_2 were 4.6-5.8 and 25-30 ℃,respectively.When cultural temperature was 25 ℃ and 35 ℃,the optimum pH value range of the xylose fermentation by P_2 was 3.4-4.2 and 3.8-5.0,respectively.
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Effects of culture condition,including nitrogen source,pH value and temperature on pentose(mainly (xylose)) fermentation by Pichia stipitis P_2 were investigated.Both growth and xylose fermentation were as good with (urea) as a sole nitrogen source as with peptone as a sole nitrogen source.The optimum pH value and temperature range of the growth of Pichia stipitis P_2 were 4.6-5.8 and 25-30 ℃,respectively.When cultural temperature was 25 ℃ and 35 ℃,the optimum pH value range of the xylose fermentation by P_2 was 3.4-4.2 and 3.8-5.0,respectively.
Key concepts: Pichia stipitis, Pentose, Xylose, Chemistry, Fermentation, Food science, Yeast, Nitrogen