| Popis: |
Geotrichum fragrans and another Geotrichum sp., 2 newly isolated microorganisms, produce -γ-decalactone, which exhibits odors characteristic of fruit and chocolate derivatives. The production of-γ-decalactone by Geotrichum species in broth, to which enzymatically hydrolyzed castor oil had been added, was investigated. The study of different microbial lipases, aimed at producing the best hydrolyzed oil for use as a precursor for the production of -γ-decalactone, was also studied. The addition of ricinoleic acid or hydrolyzed castor bean oil to the culture medium enhanced -γ-decalactone production. The greatest enhancement of -γ-decalactone production was noted, with a yield of 600 mg/L, when 5% of hydrolyzed castor bean oil was added to the medium and fermented by Geotrichum fragrans for 96 h. |
Plný text