Thermostability of Fumonisin B1, a Mycotoxin from Fusarium moniliforme, in Corn
AUTOR(ES)
Dupuy, J.
RESUMO
Fumonisin B1 (FB1) is a mycotoxin from Fusarium moniliforme that is frequently associated with corn. Thermal treatments are used in many processes concerning this cereal and its derivatives. The thermostability of this toxin in dry contaminated corn, resulting from F. moniliforme culture, was studied in different time-temperature combinations. FB1 was quantified by instrumentalized thin-layer chromatography after a two-step sequential development and postchromatographic derivatization by p-anisaldehyde. The identity of FB1 in extracts, before and after heat treatments, was confirmed by high-pressure liquid chromatography. For each temperature, the natural logarithm of the ratio of resulting FB1 on initial content (In C/C0) is linearly correlated to exposure time. The calculated half-lives (L50), corresponding to the 50% value, were 10 min, 38 min, 175 min, and 8 h at 150, 125, 100, and 75°C, respectively. There is a linear relationship between calculated L50s on a logarithmic scale and temperature. Therefore FB1 is not significantly destroyed by the main drying processes of corn or thermal treatments used for its derivatives. Other associated means are required for detoxification.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=182378Documentos Relacionados
- Production of [14C]fumonisin B1 by Fusarium moniliforme MRC 826 in corn cultures.
- Production of fumonisin B1 by Fusarium moniliforme NRRL 13616 in submerged culture.
- Influence of Kernel Age on Fumonisin B1 Production in Maize by Fusarium moniliforme
- Anti-Fusarium moniliforme activity and fumonisin biodegradation by corn and silage microflora
- Effects of temperature and incubation period on production of fumonisin B1 by Fusarium moniliforme.