The maximum amounts of acetic acid produced by ripe and unripe cocoa beans were 157 mg and 110 mg/10 g wet wt of cotyledon, respectively. The unripe beans had a lower pH than the ripe beans after 6 days' fermentation. About 40% of ripe beans achieved a chocolate colour compared with 27% of unripe be
Comparative studies on the fermentative production of lantibiotics by staphylococci
✍ Scribed by Thomas Hörner; Volker Ungermann; Hans Zähner; Hans-Peter Fiedler; Roland Utz; Roland Kellner; Günther Jung
- Publisher
- Springer
- Year
- 1990
- Tongue
- English
- Weight
- 563 KB
- Volume
- 32
- Category
- Article
- ISSN
- 1432-0614
No coin nor oath required. For personal study only.
✦ Synopsis
The production of the lanthionine-containing polypeptide antibiotics gallidermin from Staphylococcus gallinarum TU 3928 and pep 5 from S. epidermidis 5 is investigated with respect to regulation and stimulation of productivity by media components, optimization of both the media used and the fermentation process and is compared to the production of the lantibiotic epidermin from S. epidermidis TU 3298. Efficient methods for rapid quantification of lantibiotics, optimization of the media and a primary enrichment by adsorption chromatography are reported.
📜 SIMILAR VOLUMES
SINDOl calculations were performed to study the reactivity of molecules with a valence number derived from the density matrix. A comparison of valence numbers was made for selected examples of rotation barriers, substituted strained molecules, radical gas phase reactions, and acid-base reactions. Re