Volatile Monoterpenes in Black Currant (Ribes nigrum L.) Juice:  Effects of Heating and Enzymatic Treatment by β-Glucosidase

Changes of terpenes in black currant juice induced by the action of heat were investigated in the present study. Limonene, α-terpinene, linalool, α-terpineol, 4-terpineol, and menthol added to either black currant juice or a model system were thermally treated at 90 °C for 30 min. Similar heat-induc...

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Veröffentlicht in:Journal of agricultural and food chemistry 2006-03, Vol.54 (6), p.2298-2302
Hauptverfasser: Varming, Camilla, Andersen, Mogens L, Poll, Leif
Format: Artikel
Sprache:eng
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Zusammenfassung:Changes of terpenes in black currant juice induced by the action of heat were investigated in the present study. Limonene, α-terpinene, linalool, α-terpineol, 4-terpineol, and menthol added to either black currant juice or a model system were thermally treated at 90 °C for 30 min. Similar heat-induced decreases in the concentration of the terpenes were observed in the two systems. The concentration of a range of terpene hydrocarbons and oxygenated terpenes increased, α-terpineol being a main conversion product of most of the examined compounds. In the main, the measured loss of compounds exceeded the detected concentrations of products formed. In addition, determination of glycosidically bound terpenes in the juice was carried out by two methods of enzymatic hydrolysis, namely, addition of β-glucosidase to an Amberlite XAD-2 isolate or directly to black currant juice. The two methods gave the same patterns of seven released volatile aglyconic terpenes. However, none of the released terpenes are important for the odor of black currant juice. Keywords: Black currant juice; Ribes nigrum L.; thermal treatment; terpenes; aroma compounds; glycosidically bound; acid catalysis
ISSN:0021-8561
1520-5118
DOI:10.1021/jf051938k