and humulone, which possess antibiotic properties, suppressing bacterial growth favoring brewer's yeast to grow. After lupulin has been extracted in the brewing process the papery cones are discarded.

Migrant labor and social impact

The need for massed labour at harvest time meant hop-growing had a big social impact. Around the world, the labour-intensive harvesting work involved large numbers of migrant workers who would travel for the annual hop harvest. Whole families would participate and

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