Unterschiede

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--- syringa_vulgaris_l [2022/05/18 20:35] – andreas
+++ syringa_vulgaris_l [2024/05/28 09:03] (aktuell) – andreas
@@ Zeile 7: / Zeile 7: @@
 [Lamparsky, D. "Headspace technique as a versatile complementary tool to increase knowledge about constituents of domestic or exotic flowers and fruits." Essential Oils and Aromatic Plants. Springer Netherlands, 1985, 79-92]
-|{{:14dimethoxybenzene.jpg|}} \\ 1,4-dimethoxybenzene |{{:lilac_aldehydes.jpg|}} \\ lilac aldehydes |{{:lilac_alcohols.jpg|}} \\ lilac alcohols |
+Main components of the headspace of living lilac flowers were 1,4-dimethoxybenzene (48.6%), (E)/(Z)-ocimene (11.0%), indole (2.8%), lilac aldehydes (2.1%), benzaldehyde (1.2%), nonanal (0.9%), benzyl methyl ether (0.8%), lilac alcohols (0.7%), 6-methyl-5-hepten-2-one (0.4%), rose furan (0.3%), and octanal (0.2%). \\
+[Mookherjee BD et al., „Fruits and Flowers: Live vs Dead - Which do we want?“, in: Nishimura, O. „Flavors and Fragrances, a world perspective.“ Proceedings of the 10th international congress of essential oils, fragrances and flavors, Washington, DC. Vol. 375. 1986, 415-424]
+|{{:lilac_aldehydes.jpg|}} \\ lilac aldehydes |{{:lilac_alcohols.jpg|}} \\ lilac alcohols |{{anisaldehyde.jpg| anisaldehyde.jpg}} \\ anisaldehyde |{{:indole.jpg|indole}} \\ indole |
 Major constituents of the vacuum headspace concentrate from the flowers were (E)-ocimene (38%), 1,4-dimethoxybenzene (9.7%), (Z)-3-hexenol (9.5%), lilac aldehydes (7.8%), lilac alcohols (4%), anisaldehyde (2.4%), and indole (1.8%). Minor amounts of unusual ethers were present: 1,2,4-trimethoxybenzene (0.5%), methylbenzylether (0.1%), 1,2-dimethoxybenzene (tr), and 2-methoxymethylanisole (tr). \\
 [Joulain, D. „Study of the fragrance given off by certain springtime flowers.“ Progress in essential oil research (1986): 57-67]
+The headspace of purple lilac flowers contained indole (2.3% living; 1.5% picked) \\
+[Mookherjee, B. D., and Richard A. Wilson. „Tobacco constituents: Their importance in flavor and fragrance chemistry.“ Perfum. Flavor 15.1 (1990): 27-49]
 The bark of S.vulgaris contains [[http://de.wikipedia.org/wiki/Syringin|syringin]], the "peculiarly disgusting, more sweet and scratching than bitter" tasting glucoside of sinapyl alcohol (precursor to lignin or lignans). \\
@@ Zeile 24: / Zeile 30: @@
 [Floral to green: mating switches moth olfactory coding and preference. Saveer, Ahmed M., et al., Proceedings of the Royal Society B: Biological Sciences (2012): rspb20112710.] \\
 [[http://rspb.royalsocietypublishing.org/content/early/2012/02/01/rspb.2011.2710.full.html]]
+The major naturally occurring (5′S)-stereoisomers of lilac aldehydes (sweet, fresh, flowery, pleasant; ODT 0.2-0.4ng/L) have a lower odour threshold by 1-2 orders of magnitude in comparison to lilac aldehydes with (5′R)-absolute configuration (fresh, flowery; ODT 4-20ng/L). \\
+[Dacho, Vladimír, and Peter Szolcsányi. "Synthesis and olfactory properties of seco-analogues of lilac aldehydes." Molecules 26.23 (2021): 7086.]
 {{:lilac_vulgaris.jpg?600}} \\