L-[15N]Glutamic acid was prepared in high yields via a fermentative process. Brevibacterium lactofermentum, growing on a medium containing 97% enriched 15NH4Cl as a sole isotopic precursor, excreted mostly L-[15N]glutamic acid. The L-[15N]glutamic acid was purified and identified. Gas chromatography
Microbial preparation of l-[15N]tyrosine and [15N]tyramine and their gas chromatographic-mass spectrometric analyses
β Scribed by Zvi E. Kahana; Aviva Lapidot
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 448 KB
- Volume
- 149
- Category
- Article
- ISSN
- 0003-2697
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Nitric oxide (NO) and nitrous oxide (N 2 O) are two important trace gases in the atmosphere. Determining the concentration and 15 N abundance of NO and N 2 O in air is difficult owing to their very low concentration in the atmosphere (NO `1 ppb(v); N 2 O % 0.32 ppm(v)). Although 15 N analysis of N 2