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--- boronia_megastigma_nees_ex_bartl [2015/07/20 00:30]
andreas
+++ boronia_megastigma_nees_ex_bartl [2015/07/20 11:49]
andreas
@@ Zeile 4: / Zeile 4: @@
 [[http://florabase.dpaw.wa.gov.au/browse/profile/4428]]
-"Boronia megastigma Nees. (brown boronia, family Rutaceae) is an endemic shrub grown commercially in Tasmania for production of a highly valued floral extract. The strongly perfumed red-brown and golden boronia flowers are harvested in September. A yellow-brown waxy concrete is extracted from the Øowers to yield between 0.3
+Constituents of the absolute of B.megastigma from Tasmania were β-ionone and many of its derivatives like 7,8-dihydro-β-ionone, 7,8-dihydro-β-ionol, 4-oxo-β-ionone, 4-hydroxy-β-ionone, 4-oxo-β-ionol, and 3-hydroxy-β-ionone as well as isomeric 3-hydroxymegastigm-7-en-9-ones and megastigm-7-ene-3,9-dione. Furthermore, methyl (Z,E)-4-(geranyloxy)cinnamates, methyl (Z,E)-4-(5-hydroxy-geranyloxy)-cinnamates, alkyl esters of 8-hydroxylinalool, and N-[2-(4-prenyloxyphenyl)ethyl]tiglamide were identified. \\
-and 0.7% (by fresh flower weight) of extract, from which a viscous golden-coloured absolute may be prepared. Boronia extract has been fully described (Guenther, 1974 ; Davies and Menary, 1983 ; Weyerstahl et al., 1994) ;
+[Megastigmanes and other constituents of the absolute of Boronia megastigma from Tasmania., Weyerstahl, P., Marschall, H., Bork, W.R., Rilk, R., Liebigs Annalen der Chemie, 1994(10), 1043-1047] \\
-beta-ionone is the major volatile (12.30 % of total volatiles in the extract). Boronia extract has an odour that is `powerful and characteristic; it recalls that of chopped spinach and blackcurrant buds, and after partial evaporation, like that of clove buds and infusion of tea' (Penfold and Phillips, 1927). Boronia absolute has an intense floral impact, its odour is reminiscent of cassis and violet. It has a natural fruity-green freshness entwined with the character of ripening hay and sweet tea; undertones of yellow freesias
+[Constituents of the absolute of Boronia megastigma Nees. from Tasmania., Weyerstahl, P., Marschall, H., Bork, W.R., Rilk, R., Schneider, S., Wahlburg, H.C., Flavour and fragrance journal, 10(5), 1995, 297-311]
-and raspberries emerge before finishing with a slightly spicy-herbaceous (cinnamon and tobacco leaf), woody dry-out (Guenther, 1974; Roberts, 1984; Weyerstahl et al., 1994)... beta-ionone, dodecyl acetate and (Z)-heptadec-8-ene occurred in extract from all five develelopment stages..." \\
+In freshly open flowers, principle components were β-ionone (115-1092µg per g f.w.), dodecyl acetate (112-631µg), α-pinene (0-138µg) and β-pinene (0-109µg). Ethanolic extracts of petals and stigmas containing mostly β-ionone, dodecyl acetate and  (Z)-heptadec-8-ene, whereas ovaries providing mostly α-pinene and β-pinene. \\
+[Flower and volatile oil ontogeny in Boronia megastigma., Bussell, B.M., Considine, J.A., Spadek, Z.E., Annals of Botany, 76(5), 1995, 457-463] [[http://aob.oxfordjournals.org/content/76/5/457.full.pdf]]
+"Boronia megastigma Nees. (brown boronia, family Rutaceae) is an endemic shrub grown commercially in Tasmania for production of a highly valued floral extract. The strongly perfumed red-brown and golden boronia flowers are harvested in September. A yellow-brown waxy concrete is extracted from the flowers to yield between 0.3
+and 0.7% (by fresh flower weight) of extract, from which a viscous golden-coloured absolute may be prepared. Boronia extract has been fully described (Guenther, 1974 ; Davies and Menary, 1983 ; Weyerstahl et al., 1994);
+β-ionone is the major volatile (12.30% of total volatiles in the extract). Boronia extract has an odour that is `powerful and characteristic; it recalls that of chopped spinach and blackcurrant buds, and after partial evaporation, like that of clove buds and infusion of tea' (Penfold and Phillips, 1927). Boronia absolute has an intense floral impact, its odour is reminiscent of cassis and violet. It has a natural fruity-green freshness entwined with the character of ripening hay and sweet tea; undertones of yellow freesias
+and raspberries emerge before finishing with a slightly spicy-herbaceous (cinnamon and tobacco leaf), woody dry-out (Guenther, 1974; Roberts, 1984; Weyerstahl et al., 1994)... β-ionone, dodecyl acetate and (Z)-heptadec-8-ene occurred in extract from all five develelopment stages..." \\
 [The Effect of Flower Maturity and Harvest Timing on Floral Extract fromBoronia megastigma (Nees)., Mactavish, H.S., Menary, R.C., Annals of Botany, 80(3), 1997, 299-303] [[http://aob.oxfordjournals.org/content/80/3/299.full.pdf]]
 {{:boronia_megastigma.jpg?500}} \\
 Curtis’s Botanical Magazine, vol.99 [ser.3, vol.29] t.6046 (1873) [W.H.Fitch] \\
 [[http://plantgenera.org/species.php?id_species=150942]]

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