Occurrence of resveratrol and piceid in American and European hop cones.
The recent discovery in hops of trans-resveratrol and its glucoside, trans-piceid, both famous in wine for their potential role in the "French paradox", opens new doors to understanding hop health benefits. In the present work, trans-resveratrol and trans-piceid were quantified by HPLC-APCI-MS/MS in 40 American and European hop cone samples from harvests of 2004, 2005, and 2006. Their content varies greatly, in the range 0.5-12 mg/kg. All German varieties revealed low amounts of stilbenes. The highest concentrations were found in Cascade (2004) and Willamette (2004 and 2006), two American low-alpha-acid varieties. Yet, probably because trans-resveratrol is a phytoalexin, a strong influence of harvest year was also observed.
Jerkovic
Vesna
V
Unité de Brasserie et des Industries Alimentaires, Faculté d'Ingénierie biologique, agronomique et environnementale, Université catholique de Louvain, Croix du Sud, 2 bte 7, B-1348 Louvain-la-Neuve, Belgium.
Collin
Sonia
S
D002851:Chromatography, High Pressure Liquid; D005060:Europe; D005960:Glucosides / Q000032:analysis*; D027582:Humulus / Q000737:chemistry*; D013058:Mass Spectrometry; D000077185:Resveratrol; D013045:Species Specificity; D013267:Stilbenes / Q000032:analysis*; D013997:Time Factors; D014481:United States
D005960:Glucosides; D013267:Stilbenes; D000077185:Resveratrol; C058229:polydatin