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hamamelis_virginiana_l [2015/02/23 21:16]
andreas |
hamamelis_virginiana_l [2017/11/01 16:43] (aktuell)
andreas |
| aldehydes, nonanal (2.72 %) and hexacosanal (0.91 %) were the main Hamamelis ketones in the bark and leaf distillate, respectively... Compounds with 13 carbons such as the vitispiranes, [[http://www.leffingwell.com/chirality/riesling_acetal.htm|riesling acetal]], [[http://www.thegoodscentscompany.com/data/rw1513131.html|1,1,6-trimethyl-1,2-dihydronaphthalene]], 1,1,6-trimethyl-1,2,3,4-tetrahydronaphthalene, trans-β-damascenone, | aldehydes, nonanal (2.72 %) and hexacosanal (0.91 %) were the main Hamamelis ketones in the bark and leaf distillate, respectively... Compounds with 13 carbons such as the vitispiranes, [[http://www.leffingwell.com/chirality/riesling_acetal.htm|riesling acetal]], [[http://www.thegoodscentscompany.com/data/rw1513131.html|1,1,6-trimethyl-1,2-dihydronaphthalene]], 1,1,6-trimethyl-1,2,3,4-tetrahydronaphthalene, trans-β-damascenone, |
| and hydroxydihydroedulan are rare essential oil components, accounting for ca 0.4%. The diterpenes manoyloxide, geranyl-linalool isomer-4, kaurene and manool were altogether identified in the leaf and bark product at 0.62% and 0.99%, respectively; geranyllinalool isomer-4 and manoyl oxide being the main components in both distillates." \\ | and hydroxydihydroedulan are rare essential oil components, accounting for ca 0.4%. The diterpenes manoyloxide, geranyl-linalool isomer-4, kaurene and manool were altogether identified in the leaf and bark product at 0.62% and 0.99%, respectively; geranyllinalool isomer-4 and manoyl oxide being the main components in both distillates." \\ |
| [Study on the composition of the volatile fraction of Hamamelis virginiana., Engel, R., Gutmann, M., Hartisch, C., Kolodziej, H., Nahrstedt, A., Planta medica, Vol.64(3), 1998, 251-258] \\ | [Study on the composition of the volatile fraction of Hamamelis virginiana., Engel, R., Gutmann, M., Hartisch, C., Kolodziej, H., Nahrstedt, A., Planta medica, Vol.64(3), 1998, 251-258] |
| [[http://www.researchgate.net/profile/Dr_Adolf_Nahrstedt/publication/6551115_Study_on_the_composition_of_the_volatile_fraction_of_Hamamelis_virginiana/links/0046352d4292ce3f68000000.pdf]] | |
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| "... two major classes of constituents, namely polymeric proanthocyanidins and polysaccharides were isolated from Hamamelis bark and tested concerning their influence on proliferation and differentiation of cultured human keratinocytes. While the polysaccharide fraction, consisting mainly of arabans and arabinogalactans, did not effect human keratinozytes, the proanthocyanidins strongly increased the proliferation of the cells, while the differentiation was not influenced significantly. Within a preliminary cumulative in vivo study on SLS-irritated skin, proanthocyanidins (ProcyanoPlus) were proven to reduce transepidermal water loss and erythema formation. Furthermore, a clinical scoring indicated that procyanidins can influence irritative processes significantly." \\ | "... two major classes of constituents, namely polymeric proanthocyanidins and polysaccharides were isolated from Hamamelis bark and tested concerning their influence on proliferation and differentiation of cultured human keratinocytes. While the polysaccharide fraction, consisting mainly of arabans and arabinogalactans, did not effect human keratinozytes, the proanthocyanidins strongly increased the proliferation of the cells, while the differentiation was not influenced significantly. Within a preliminary cumulative in vivo study on SLS-irritated skin, proanthocyanidins (ProcyanoPlus) were proven to reduce transepidermal water loss and erythema formation. Furthermore, a clinical scoring indicated that procyanidins can influence irritative processes significantly." \\ |
| [Highly galloylated tannin fractions from witch hazel (Hamamelis virginiana) bark: electron transfer capacity, in vitro antioxidant activity, and effects on skin-related cells., Touriño, S., Lizárraga, D., Carreras, A., Lorenzo, S., Ugartondo, V., Mitjans, M., Torres, J.L., Chemical research in toxicology, Vol.21(3), 2008, 696-704] | [Highly galloylated tannin fractions from witch hazel (Hamamelis virginiana) bark: electron transfer capacity, in vitro antioxidant activity, and effects on skin-related cells., Touriño, S., Lizárraga, D., Carreras, A., Lorenzo, S., Ugartondo, V., Mitjans, M., Torres, J.L., Chemical research in toxicology, Vol.21(3), 2008, 696-704] |
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| {{http://www.plantillustrations.org/ILLUSTRATIONS_HD/31501.jpg?500}} \\ | {{:hamamelis_virginiana.jpg?600}} \\ |
| Köhler, F.E., Medizinal Pflanzen, vol. 3: t. 39 (1890) \\ | Köhler, F.E., Medizinal Pflanzen, vol. 3: t. 39 (1890) \\ |
| [[http://www.plantillustrations.org/species.php?id_species=492796]] | [[http://www.plantillustrations.org/species.php?id_species=492796]] |
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| | {{hamamelis_virginiana_flowering.jpg}} \\ |
| | Hamamelis virginiana flowering in late winter, Author: Andreas Kraska [[https://creativecommons.org/licenses/by-sa/3.0/de/|CC BY-SA 3.0]] |
