By means of an activity-guided fractionation the most potent bitter substances in hazelnuts, named diarylheptanoids, could be localized and structural identified. After the development of a suitable quantitation method using LC-MS/MS quantitative studies exhibited a bug attack resulted in a defect called Cimiciato-damage as well as the germination of hazelnuts as reasons for their bitter off-taste. Finally, first molecular bases could be created to establish a quality control system for hazelnut raw material based on the determination of the key bitter substance asadanin.
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By means of an activity-guided fractionation the most potent bitter substances in hazelnuts, named diarylheptanoids, could be localized and structural identified. After the development of a suitable quantitation method using LC-MS/MS quantitative studies exhibited a bug attack resulted in a defect called Cimiciato-damage as well as the germination of hazelnuts as reasons for their bitter off-taste. Finally, first molecular bases could be created to establish a quality control system for hazelnut...
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