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A total of 47 honeys and 22 fl owering plants was analysed for their load of synthetic fi bres and fragments. In all samples investigated foreign particles were found. These include also black carbon particles which were not enumerated. Fibres and fragments ranged from 10 to 336 kg -1 and 2 to 82 kg -1 honey, respectively. The data of the fl owering plants analysed indicate that a major proportion of the particle load may originate from external sources, i.e. these particles are brought into the beehive by the worker bees during nectar collection.
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Liebezeit et al. (2015) studied this question.
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