| 摘要 |
L-Aspartic acid is prepared by mixing a strain of Pseudomonas trifolii with an aqueous solution of fumaric acid or a fumarate and ammonia or an ammonium salt, and allowing the mixture to stand under neutral or mildly alkaline conditions. The strain of Pseudomonas trifolii may be in the form of a cultured broth, a living cell suspension, treated cells, crude extract, enzyme preparation or cell free extract. Diammonium fumarate may be employed as both the fumarate and the ammonium salt.
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