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投稿时间:2021-08-23
投稿时间:2021-08-23
中文摘要: 通过茚三酮显色初筛、Elson-Morgon定量及液质联用(liquid chromatograph mass spectrometer,LC-MS)仪定性复筛的方法从土壤中分离筛选得到一株胞外产氨基葡萄糖(glucosamine,GlcN)的曲霉11,将其鉴定为Aspergillus piperis。通过测定曲霉11的生长曲线以及优化曲霉11的发酵条件,最终使得曲霉11在发酵时间12 h、发酵pH3.0、摇床转速180 r/min、发酵温度25℃、接种量8%的条件下GlcN产量为2.687 g/L,是优化前的1.75倍。
中文关键词: 氨基葡萄糖(GlcN) 胞外 Aspergillus piperis 分离纯化 发酵条件优化
Abstract:A extracellular glucosamine(GlcN)-producing strain,Aspergillus 11,was isolated from the soil after primary screening with ninhydrin method and rescreening with Elson-Morgon assay combined with liquid chromatography-mass spectrometry(LC-MS).It was then identified as Aspergillus piperis.The growth curve of the strain was established and then the fermentation conditions were optimized.The GlcN yield of Aspergillus 11 reached 2.687 g/L after fermentation at pH3.0,rotation speed of 180 r/min,25℃,and inoculum size of 8%for 12 h,which was 1.75 times of that before optimization.
keywords: glucosamine(GlcN) extracellular Aspergillus piperis isolation and purification optimization of fermentation conditions
文章编号:202223026 中图分类号: 文献标志码:
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