Matches in SemOpenAlex for { <https://semopenalex.org/work/W2386244426> ?p ?o ?g. }
Showing items 1 to 63 of
63
with 100 items per page.
- W2386244426 abstract "In order to improve the availability of DL-tyrosine, the unwanted L-tyrosine in the L-tyrosine–rich by-product of DL-tyrosine optic resolution process for getting D-tyrosine had better be converted into DL-tyrosine again by racemization process. The experimental results show that in the presence of acetic anhydride, the L-tyrosine can be completely racemized and converted into DL-tyrosine both in NaOH aqueous solution and in acetic acid solvent, and moreover, in the presence of acetic anhydride, the L-tyrosine is racemized more rapidly in acetic acid solvent and a higher yield of DL-tyrosine can be achieved. The influences of the factors, such as the molar ratio of L-tyrosine to acetic anhydride and sodium hydroxide in NaOH aqueous solution, the molar ratio of L-tyrosine to acetic anhydride in the acetic acid solvent and the racemizing temperature, on the racemization process were studied. The appropriate racemizing conditions for racemization in acetic acid solvent were found to be: temperature 80~90℃, molar ratio of L-tyrosine to acetic anhydride 2:1 and amount of acetic acid 5 mL for each gram of L-tyrosine. Under above racemization conditions, the L-tyrosine was racemized into DL-tyrosine within 4 h, the rate of racemization is 100% and the yield of the DL-tyrosine product is 90%." @default.
- W2386244426 created "2016-06-24" @default.
- W2386244426 creator A5023223014 @default.
- W2386244426 date "2007-01-01" @default.
- W2386244426 modified "2023-09-28" @default.
- W2386244426 title "Study on the Racemization of L-Tyrosine" @default.
- W2386244426 hasPublicationYear "2007" @default.
- W2386244426 type Work @default.
- W2386244426 sameAs 2386244426 @default.
- W2386244426 citedByCount "0" @default.
- W2386244426 crossrefType "journal-article" @default.
- W2386244426 hasAuthorship W2386244426A5023223014 @default.
- W2386244426 hasConcept C134121241 @default.
- W2386244426 hasConcept C161790260 @default.
- W2386244426 hasConcept C178790620 @default.
- W2386244426 hasConcept C185592680 @default.
- W2386244426 hasConcept C191897082 @default.
- W2386244426 hasConcept C192562407 @default.
- W2386244426 hasConcept C2776165026 @default.
- W2386244426 hasConcept C2776673659 @default.
- W2386244426 hasConcept C2779854550 @default.
- W2386244426 hasConcept C2780471494 @default.
- W2386244426 hasConcept C55493867 @default.
- W2386244426 hasConcept C60002323 @default.
- W2386244426 hasConceptScore W2386244426C134121241 @default.
- W2386244426 hasConceptScore W2386244426C161790260 @default.
- W2386244426 hasConceptScore W2386244426C178790620 @default.
- W2386244426 hasConceptScore W2386244426C185592680 @default.
- W2386244426 hasConceptScore W2386244426C191897082 @default.
- W2386244426 hasConceptScore W2386244426C192562407 @default.
- W2386244426 hasConceptScore W2386244426C2776165026 @default.
- W2386244426 hasConceptScore W2386244426C2776673659 @default.
- W2386244426 hasConceptScore W2386244426C2779854550 @default.
- W2386244426 hasConceptScore W2386244426C2780471494 @default.
- W2386244426 hasConceptScore W2386244426C55493867 @default.
- W2386244426 hasConceptScore W2386244426C60002323 @default.
- W2386244426 hasLocation W23862444261 @default.
- W2386244426 hasOpenAccess W2386244426 @default.
- W2386244426 hasPrimaryLocation W23862444261 @default.
- W2386244426 hasRelatedWork W2005488496 @default.
- W2386244426 hasRelatedWork W2022565075 @default.
- W2386244426 hasRelatedWork W2351120551 @default.
- W2386244426 hasRelatedWork W2351579499 @default.
- W2386244426 hasRelatedWork W2352245785 @default.
- W2386244426 hasRelatedWork W2354041095 @default.
- W2386244426 hasRelatedWork W2355093326 @default.
- W2386244426 hasRelatedWork W2355816039 @default.
- W2386244426 hasRelatedWork W2359817808 @default.
- W2386244426 hasRelatedWork W2366732328 @default.
- W2386244426 hasRelatedWork W2367981032 @default.
- W2386244426 hasRelatedWork W2369986484 @default.
- W2386244426 hasRelatedWork W2371313155 @default.
- W2386244426 hasRelatedWork W2373801212 @default.
- W2386244426 hasRelatedWork W2380141677 @default.
- W2386244426 hasRelatedWork W2382331836 @default.
- W2386244426 hasRelatedWork W2387737982 @default.
- W2386244426 hasRelatedWork W2393813518 @default.
- W2386244426 hasRelatedWork W2814199980 @default.
- W2386244426 hasRelatedWork W2816946753 @default.
- W2386244426 isParatext "false" @default.
- W2386244426 isRetracted "false" @default.
- W2386244426 magId "2386244426" @default.
- W2386244426 workType "article" @default.