alpha-Ionone

United States Patent 5202124

Attractants for the rose chafer, Macrodactylus subspinosus (F.), containing α-ionone.[Reference: WebLink]

METHODS AND RESULTS:
Compositions of α-ionone were found to effectively attract rose chafers, Macrodactylus subspinosus (F.). The alpha-Ionone may be used alone or in combination with one or more low-molecular-weight organic compounds including: (1) an organic acid component selected from the group of valeric acid, hexanoic acid, and mixtures thereof, (2) an ester component comprising octyl butyrate, and/or (3) an alcohol component comprising one or more higher alcohols.
CONCLUSIONS:
By attracting the beetles to field traps, the attractants are useful for the monitoring and control of these agricultural pests.

Journal of Agricultural & Food Chemistry, 2005, 53(2):393-7.

Identification and aroma impact of norisoprenoids in orange juice.[Pubmed: 15656678]

METHODS AND RESULTS:
Four norisoprenoids, alpha-Ionone, beta-ionone, beta-cyclocitral, and beta-damascenone, along with their putative carotenoid precursors, were identified in Valencia orange juice using time-intensity GC-O, GC-MS, and photodiode array HPLC. alpha-Ionone and beta-cyclocitral are reported in orange juice for the first time. GC-O aroma peaks were categorized into seven groups with similar sensory qualities: citrus/minty, metallic/mushroom/geranium, roasted/cooked/meaty/spice, fatty/soapy/green, sulfury/solventy/medicine, floral, and sweet fruity. The four norisoprenoids contributed approximately 8% of the total aroma intensity and 78% of the total floral aroma category.
CONCLUSIONS:
The putative carotenoid norisoprenoid precursors, alpha- and beta-carotene, alpha- and beta-cryptoxanthin, and neoxanthin, were identified in the same orange juice using photodiode array HPLC retention times and spectral characteristics.