Re: L' « helvelle suspecte » dit gyromitre esculenta
Posté : 17 août 2018, 17:47
https://www.researchgate.net/publication/226488550
Citation & Abstract :
Citation & Abstract :
K. Larsson, Bonny & T. Eriksson, Anders. (1989).
The analysis and occurrence of hydrazine toxins in fresh and processed false morel,Gyromitra esculenta.
Two methods for the extraction and determination of hydrazines in false morel,Gyromitra esculenta, were compared. Extraction under acid hydrolysis yielded much higher levels of the hydrazines, measured as monomethylhydrazine (MMH), than a direct solvent extraction. This shows that the greater part of the hydrazines in the false morel is chemically bound.
Further studies are required to reveal the extent to which these stable hydrazine compounds are liberated in the human stomach after ingestion of false morels. The total amounts of MMH in Swedish fresh false morels varied from 40 to 150 mg/kg. Boiling the fungus in large amounts of water for 2 x 5 min effectively reduced the levels to 10% of the original amounts. After drying in the open air at room temperature for 3 months, as much as 30%-71 % of MMH remained in the fungus.
These results suggest that the drying of false morels is an inadequate method of detoxication.