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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Journal Article

Journal Article

Rose petal tea as an antioxidant-rich beverage: cultivar effects  [2006]

Vinokur, Y.; Rodov, V.; Reznick, N.; Goldman, G.; et al.

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Twelve rose cultivars were selected by field tasting as potential sources of edible flowers. Hot water infusions (teas) of air-dried petals of these cultivars were assayed for antioxidant activity, total phenols, and total anthocyanins contents. Their composition was analyzed by high-performance liquid chromatography (HPLC). Green tea was tested in parallel as a reference antioxidant-rich beverage. Rose petal teas from different cultivars exhibited scavenging capacity toward 2,2'-azino-bis-(3-ethylbenzothiazoline)-6-sulfonate cation radical (ABTS+) ranging between 712.7 and 1770.7 micromolar Trolox equivalents (TE) per gram of dry petals, as compared with 1227.6 micromolar TE/g dry weight in the green tea. The range of total phenols content in rose teas was 50.7 to 119.5 mg gallic acid equivalents (GAE) per gram of dry matter, as compared with 62.1 mg GAE/g dry weight in the green tea. The rose teas were rich in free gallic acid. The highest values of antioxidant activity, total phenols, and gallic acid contents were found in the cultivars San Francisco, Katharina Zeimet, and Mercedes and in the essential-oil-bearing rose Rosa damascena. The correlation coefficients between antioxidant activity, on the 1 hand, and the contents of total phenols and of gallic acid in various rose cultivars, on the other hand, were 0.79 and 0.81, respectively. No clear relationship between anthocyanin level and radical-scavenging activity was revealed. Teas from different ros
e cultivars significantly differed in their sensory properties. It was concluded that dried rose petals may be used for preparing antioxidant-rich caffeine-free beverages, either separately or in combination with other herbal materials.

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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
71
Issue:
1
Start Page:
S42
End Page:
S47
All titles:
" Rose petal tea as an antioxidant-rich beverage: cultivar effects "
Other:
" Includes references "

From the journal

Journal of food science

ISSN : 0022-1147