Rotundone Imparts Peppery Aroma | Chemical & Engineering News
Latest News
Web Date: May 15, 2008

Rotundone Imparts Peppery Aroma

Bicyclic terpene is found in several spices and wines
Department: Science & Technology
Rotundone
a bicyclic terpene, can be detected by people with sensitive noses in the low nanogram-per-liter level.
8620news5
 
Rotundone
a bicyclic terpene, can be detected by people with sensitive noses in the low nanogram-per-liter level.

The sesquiterpene rotundone gives pepper its distinctive aroma, says an international group of researchers in a pair of papers in the Journal of Agricultural & Food Chemistry (DOI: 10.1021/jf800183k and 10.1021/jf800184t). Previously, the aroma of black pepper was attributed to complex interactions of many chemical components, including piperine and related alkaloids that produce a spicy heat sensation in the mouth.

The researchers, led by Alan P. Pollnitz of the Australian Wine Research Institute, in Adelaide, found rotundone not only in white and black pepper but also in marjoram, oregano, rosemary, basil, thyme, and geranium. In addition, they identified the compound as the source of a peppery or spicy aroma in some shiraz wines.

Some aroma testers were able to sniff out the sesquiterpene at concentrations as low as 0.4 ng/L in water and in wine, making rotundone one of the most powerful aroma compounds known. Others were unable to detect the compound even at high concentrations, suggesting that flavor perceptions of wine or ground pepper in food may vary widely among consumers, the authors say.

 
Chemical & Engineering News
ISSN 0009-2347
Copyright © American Chemical Society

Leave A Comment

*Required to comment