Distribution of ergot alkaloids and ricinoleic acid in different milling fractions |
| |
Authors: | Carolin Franzmann Jan Schröder Klaus Mϋnzing Klaus Wolf Meinolf G Lindhauer Hans-Ulrich Humpf |
| |
Institution: | 1.Institut f?r Lebensmittelchemie,Westf?lische Wilhelms-Universit?t M?nster,M?nster,Germany;2.Max Rubner-Institut,Detmold,Germany |
| |
Abstract: | The sclerotia of the fungus Claviceps sp. are still a challenge for the milling industry. Ergot sclerotia are a constant contamination of the rye crop and have
to be removed by modern milling technologies. Changing sizes and coloration of the sclerotia make it difficult to separate
them from the grain. Ergot sclerotia are a problem when cleaning is insufficient and non-separated specimens or sclerotia
fragments get into the milling stream and thus ergot alkaloids are distributed into the different cereal fractions. In model
milling experiments, the residues of ergot in rye flour and the distribution of ergot into different milling fractions were
investigated. Rye grains were mixed with whole ergot sclerotia and in another experiment with ergot powder and cleaned afterwards
before milling. The ergot alkaloids ergometrine, ergosine, ergotamine, ergocornine, ergocryptine, ergocristineand their related
isomeric forms (-inine-forms), and additionally ricinoleic acid as a characteristic component of ergot, were quantified in
the different milling fractions. From the first experiment, it can be shown that after harvesting even simple contact of sclerotia
with bulk grains during ordinary handling or movement of bulk grain in the granary is sufficient to contaminate all the healthy
or sound rye grains with ergot alkaloids. Thereby, the amount of ergot residue correlates with the amount of peripheral layers
of rye grains in the flour. In an additional experiment without sclerotia specimens, bulk rye grains were loaded with powder
of sclerotia. After subsequent cleaning, aconcentration of ergot alkaloids was detected, which was tenfold higher than the
ergot alkaloidconcentration of the experiment with intact ergot sclerotia. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|