Benutzer-Werkzeuge

Webseiten-Werkzeuge


betula_pendula_roth

Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

Link zu dieser Vergleichsansicht

Beide Seiten der vorigen Revision Vorhergehende Überarbeitung
betula_pendula_roth [2018/12/27 14:17]
andreas
betula_pendula_roth [2018/12/27 17:58] (aktuell)
andreas
Zeile 6: Zeile 6:
 "The main components in June samples, (Z)-3-hexenyl acetate (Z3C6Ac), (Z)-3-hexen-1-ol (Z3C6OH), (E)-β-ocimene,​ bourbonene, methyl salicylate, α-cubebene,​ and caryophellene,​ were also found in similar proportions in August, but at significantly lower levels. The sums of all volatiles also differed between seasons... Some monoterpenes (β-pinene, sabinene), GLVs [green-leaf volatiles] (hexanal, 1-hexanol), and sesquiterpenes (α-cubebene,​ bourbonene, and β-cubebene) were present in June samples in relatively large amounts, but were not detected in August. In contrast, (Z)-β-ocimene (5%), butanoic acid (1.9%) and pentanoic acid (34%) were found in August, but not in June." \\ "The main components in June samples, (Z)-3-hexenyl acetate (Z3C6Ac), (Z)-3-hexen-1-ol (Z3C6OH), (E)-β-ocimene,​ bourbonene, methyl salicylate, α-cubebene,​ and caryophellene,​ were also found in similar proportions in August, but at significantly lower levels. The sums of all volatiles also differed between seasons... Some monoterpenes (β-pinene, sabinene), GLVs [green-leaf volatiles] (hexanal, 1-hexanol), and sesquiterpenes (α-cubebene,​ bourbonene, and β-cubebene) were present in June samples in relatively large amounts, but were not detected in August. In contrast, (Z)-β-ocimene (5%), butanoic acid (1.9%) and pentanoic acid (34%) were found in August, but not in June." \\
 [Zhang, Qing-He, et al. „Leaf volatiles from nonhost deciduous trees: variation by tree species, season and temperature,​ and electrophysiological activity in Ips typographus.“ Journal of Chemical Ecology 25.8 (1999): 1923-1943] ​ [Zhang, Qing-He, et al. „Leaf volatiles from nonhost deciduous trees: variation by tree species, season and temperature,​ and electrophysiological activity in Ips typographus.“ Journal of Chemical Ecology 25.8 (1999): 1923-1943] ​
- 
-"​Volatile constituents of beechwood creosote were determined using gas chromatography (GC) and gas chromatography–mass spectrometry (GC‐MS). The major volatile constituents of creosote were 2‐methoxyphenol (guaiacol; 25.2%) 2‐methoxy‐4‐methylphenol (4‐methylguaiacol;​ 21.4%), 3‐methylphenol (m‐cresol;​ 8.3%) 4‐methylphenol (p‐cresol;​ 7.9%) 2‐methylphenol (o‐cresol;​ 4.6%) and phenol (2.8%)."​ \\ 
-[Lee, Kwang‐Geun,​ et al. "​Antioxidant activity and characterization of volatile constituents of beechwood creosote."​ Journal of the Science of Food and Agriculture 85.9 (2005): 1580-1586] 
  
 The rectified [[http://​www.thegoodscentscompany.com/​data/​es1001911.html|oil of birch bark tar]] is used in perfumery for smoky-leathery-phenolic notes. The tar is manufactured by controlled heating of bark of various birch species (mainly white birch). Several methyl- and methoxy-substituted phenols and some naphtalene derivatives are found in the headspace of the tar (which is used in ancient times as adhesive for  hafting lithic tools on wooden shaft or for repairing and decorating ceramic vessels). Volatile components of the liquid tar include phenol and derivatives like 2-methylphenol,​ 2-methoxyphenol (guaiacol), dimethoxyphenol,​ dimethylphenol,​ trimethylphenol,​ 2-methoxy-4-methylphenol,​ 4-ethyl-2-methoxyphenol e.g.; naphtalenes like methylnaphtalene,​ ethylnaphtalene,​ and trimethylnaphtalene,​ and sesquiterpenes like calamenene. \\  The rectified [[http://​www.thegoodscentscompany.com/​data/​es1001911.html|oil of birch bark tar]] is used in perfumery for smoky-leathery-phenolic notes. The tar is manufactured by controlled heating of bark of various birch species (mainly white birch). Several methyl- and methoxy-substituted phenols and some naphtalene derivatives are found in the headspace of the tar (which is used in ancient times as adhesive for  hafting lithic tools on wooden shaft or for repairing and decorating ceramic vessels). Volatile components of the liquid tar include phenol and derivatives like 2-methylphenol,​ 2-methoxyphenol (guaiacol), dimethoxyphenol,​ dimethylphenol,​ trimethylphenol,​ 2-methoxy-4-methylphenol,​ 4-ethyl-2-methoxyphenol e.g.; naphtalenes like methylnaphtalene,​ ethylnaphtalene,​ and trimethylnaphtalene,​ and sesquiterpenes like calamenene. \\ 
betula_pendula_roth.txt · Zuletzt geändert: 2018/12/27 17:58 von andreas