GB884415A - Method for producing l-pyrrolidonecarboxylic acid and its salts - Google Patents
Method for producing l-pyrrolidonecarboxylic acid and its saltsInfo
- Publication number
- GB884415A GB884415A GB37333/59A GB3733359A GB884415A GB 884415 A GB884415 A GB 884415A GB 37333/59 A GB37333/59 A GB 37333/59A GB 3733359 A GB3733359 A GB 3733359A GB 884415 A GB884415 A GB 884415A
- Authority
- GB
- United Kingdom
- Prior art keywords
- centrifuging
- preferred
- thornton
- gray
- enzyme
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P17/00—Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms
- C12P17/10—Nitrogen as only ring hetero atom
Landscapes
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Zoology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microbiology (AREA)
- General Chemical & Material Sciences (AREA)
- Biotechnology (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
L-Pyrrolidone carboxylic acid is prepared by subjecting an aqueous solution containing L-glutamic acid to the action of Pseudomonas cruciviae Gray and Thornton, or the enzyme thereof, and recovering L-pyrrolidone carboxylic acid from the resulting mixture, e.g. by filtration, acidification and extraction with a solvent for the product. The micro-organism may be added as an aqueous suspension, as separated cells, or as cell homogenates. The preferred pH is 6-9, the preferred temperature 20 DEG C.-60 DEG C., and the preferred initial L-glutamic acid concentration 10-100 mg/ml. The enzyme of P. cruciviae Gray and Thornton may be prepared by treating the lyophilised cells with supersonic vibration in the presence of phosphate buffer, centrifuging, treating the supernatant liquid with saturated ammonium sulphate solution, centrifuging after 20 hours, adding ammonium sulphate powder to the supernatant liquid, centrifuging and lyophilising.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP884415X | 1958-11-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB884415A true GB884415A (en) | 1961-12-13 |
Family
ID=13942873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB37333/59A Expired GB884415A (en) | 1958-11-10 | 1959-11-03 | Method for producing l-pyrrolidonecarboxylic acid and its salts |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB884415A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10895592B2 (en) | 2017-03-24 | 2021-01-19 | Rosemount Aerospace Inc. | Probe heater remaining useful life determination |
| US10914777B2 (en) | 2017-03-24 | 2021-02-09 | Rosemount Aerospace Inc. | Probe heater remaining useful life determination |
| US10962580B2 (en) | 2018-12-14 | 2021-03-30 | Rosemount Aerospace Inc. | Electric arc detection for probe heater PHM and prediction of remaining useful life |
| US11060992B2 (en) | 2017-03-24 | 2021-07-13 | Rosemount Aerospace Inc. | Probe heater remaining useful life determination |
| US11061080B2 (en) | 2018-12-14 | 2021-07-13 | Rosemount Aerospace Inc. | Real time operational leakage current measurement for probe heater PHM and prediction of remaining useful life |
| US11472562B2 (en) | 2019-06-14 | 2022-10-18 | Rosemount Aerospace Inc. | Health monitoring of an electrical heater of an air data probe |
| US11630140B2 (en) | 2020-04-22 | 2023-04-18 | Rosemount Aerospace Inc. | Prognostic health monitoring for heater |
| US11930563B2 (en) | 2019-09-16 | 2024-03-12 | Rosemount Aerospace Inc. | Monitoring and extending heater life through power supply polarity switching |
-
1959
- 1959-11-03 GB GB37333/59A patent/GB884415A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10895592B2 (en) | 2017-03-24 | 2021-01-19 | Rosemount Aerospace Inc. | Probe heater remaining useful life determination |
| US10914777B2 (en) | 2017-03-24 | 2021-02-09 | Rosemount Aerospace Inc. | Probe heater remaining useful life determination |
| US11060992B2 (en) | 2017-03-24 | 2021-07-13 | Rosemount Aerospace Inc. | Probe heater remaining useful life determination |
| US10962580B2 (en) | 2018-12-14 | 2021-03-30 | Rosemount Aerospace Inc. | Electric arc detection for probe heater PHM and prediction of remaining useful life |
| US11061080B2 (en) | 2018-12-14 | 2021-07-13 | Rosemount Aerospace Inc. | Real time operational leakage current measurement for probe heater PHM and prediction of remaining useful life |
| US11472562B2 (en) | 2019-06-14 | 2022-10-18 | Rosemount Aerospace Inc. | Health monitoring of an electrical heater of an air data probe |
| US11930563B2 (en) | 2019-09-16 | 2024-03-12 | Rosemount Aerospace Inc. | Monitoring and extending heater life through power supply polarity switching |
| US11630140B2 (en) | 2020-04-22 | 2023-04-18 | Rosemount Aerospace Inc. | Prognostic health monitoring for heater |
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