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--- helichrysum_italicum_roth_g.don [2018/09/20 10:14]
andreas
+++ helichrysum_italicum_roth_g.don [2019/04/15 10:28]
andreas
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 "The strong scent of flowers reminiscent of curry, it is particularly intense during hot weather." [[http://de.wikipedia.org/wiki/Helichrysum_italicum]]
+"...Corsican oils were found to contain neryl acetate as predominant compound, with amounts from 15.8% (from plants in stage of early shoots) to 42.5% (in full flowering period). In a second part, we sampled Helichrysum italicum subsp. italicum from three locations over the growth cycle of the plant. Significant variations were observed in the concentration of the main constituents, pointing out a chemical composition of oils produced from plants in early shoots (higher amounts of ketones and β‐diketones [like 3,5-dimethylheptan-2,4-dione and 4,6-dimethyloctan-3,5-dione]) different from that obtained from samples harvested in the stages of flowering (higher contents of neryl acetate)." \\
+[Bianchini, Ange, et al. "Composition of Helichrysum italicum (Roth) G. Don fil. subsp. italicum essential oils from Corsica (France)." Flavour and fragrance journal 16.1 (2001): 30-34]
+| {{nerylacetate.png| nerylacetate }} \\ nerylacetate | {{46dimethyloctan35dione.png| 4,6-dimethyloctan-3,5-dione }} \\ 4,6-dimethyloctan-3,5-dione |
 Tuscan Helichrysum italicum subsp.italicum oils exhibited high contents of sesquiterpene hydrocarbons (23-38%) with significant amounts of β-selinene (7-12%), β-caryophyllene (5-11%) and α-selinene (5-8%). The major compounds were α-pinene (53.5% max) or neryl acetate (22.0% max). \\
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 The olfactometry profile of Helichrysum italicum essential oil from Balkans showed green notes (nerol oxide, 2,4-decadienal, ɣ-curcumene, three unknown compounds), fruity notes (damascenone, italidione I, italidione II/α-curcumene), terpenic notes (1,8-cineole, α-terpineol), nutty notes (pyrazine, terpinen-4-ol), floral notes (linalool), the animalic p-cresyl acetate, and the spicy isobutyl angelate. \\
 [Laure Saint-Lary, Francis Hadji Minaglou, Christian Escriva, Anne-Sophie Beyls, Frédéric Badie:  "Helichrysum italicum D.C. Essential Oil from Balkans" Perfumer and Flavorist 47 (2018): 52-66]
+„The main constituent, neryl acetate was not a key odorant despite its content of 30%! The 1,3-diketones (specific components of Helichrysum oils) are key odorants of the essential oil... The most odor-active constituents perceived by all the panelists and showing the highest mean Flavor Dilution factor were 4,6-dimethyloctan-3,5-dione, 1,8-cineole and nerol...“ \\
+[Andreani, Stéphane, et al. "Key odorants of industrially-produced Helichrysum italicum subsp. italicum essential oil." Industrial Crops and Products 132 (2019): 275-282]
 {{:helichrysum_italicum_subsp_microphyllum.jpg}} \\
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 Author: Giancarlo Dessì (2007), Professional Institute of Agriculture and Environment "Cettolini" of Cagliari \\
 [[https://creativecommons.org/licenses/by-sa/3.0/de/|CC BY-SA 3.0]], [[https://commons.wikimedia.org/wiki/File:Helichrysum_italicum_subsp_microphyllum_g07.jpg|Wikimedia Commons]]

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