用蒸馏水或乙醇水溶液抽提试样中的水溶性酸或碱，然后用酸度计或指示剂对抽提物进行测定。
It USES distilled water and alcohol to refine water soluble acid and alkali of sample and then test the extractive with PH indicator.
在酵母粉基础发酵培养基中，添加各种无机离子和游离氨基酸，使其含量与酵母抽提物相同。
The inorganic ions and the amino acids were respectively added to the medium while yeast powder was used as base nitrogen source.
目前，有相当大的兴趣集中于生产很高的核苷酸含量的酵母抽提物用作风味强化剂。
Currently, there is considerable interest to produce very high 5-nucleotide-rich yeast extracts for use in flavor enhancement.
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