nitrogen source 氮源 ; 氮源物质 ; 工业上常用的氮源
inorganic nitrogen source 无机氮源
nitrogen source concentration 氮源浓度
free nitrogen source 游离氨基氮
best nitrogen source 最佳氮源
sole nitrogen source 唯一氮源
only nitrogen source 唯一氮源
The effects of inoculums, fermentation temperature and time, and nitrogen source on production of citric acid from aged paddy rice by liquid-state fermentation of Aspergillus niger were studied.
研究了接种量、发酵温度与时间、氮源等因素对以陈化稻米为原料，黑曲霉液态发酵法生产柠檬酸的影响，并优化了工艺。
The results of the experiments showed Peptone was the best nitrogen source in solid culturate, the second was yeast extract.
结果表明；在固体培养中，病菌对氮源的利用以蛋白胨为最好，其次为酵母膏。
The optimum nitrogen source is urea, next is peptone or yeast extract.
氮源中尿素最好，其次为蛋白胨和酵母膏；
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