| http://www.w3.org/ns/prov#value | - According to a first aspect of the present invention there is provided a process for pre-treating propolis comprising at least one allergenic substance of general formula (1), wherein R is an alkyl or alkenyl selected from the group comprising 3-methyl-2-butenyl, 2-methyl-2-butenyl, 3-methyl-3-butenyl, benzyl and phenylethyl, characterized in that propolis is caused to react with probiotic microor
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