James A. Duke. Handbook of Energy Crops. Bitter substance obtained from glandular hairs of strobilus used by brewers for giving aroma and flavor to beer. Originally used for their preservative value, the hops were only later noted to impart a flavor to beer.
Substance prevents gram-negative bacteria from growing in the beer or wort.
Oil of Hops also used in perfumes, cereal beverages, mineral waters, and tobacco. Stems are source of fiber like soybean stalks, cotton stalks, flax shives and similar agricultural residues and have, been suggested for pulp or biomass production. Fiber has relatively high lignin and low pentosan content, with a cellulose content lower than any of them. Sometimes used for filler material in corrugated paper or board products, but unsuited for corrugated paper because of low pulp yield and high chemical requirement or for production of high-grade pulp for speciality paper. Young bleached tops used as a vegetable, especially in Belgium.