نتایج جستجو برای: phytol
تعداد نتایج: 470 فیلتر نتایج به سال:
From the unsaponifiable fraction (63 g) of linseed oil (25 kg), two terpenic alcohols were isolated by alumina column, thin-layer, and gas-liquid chromatography. They were identified as phytol and geranyl geraniol (a precursor of bi- and tricyclic diterpenes) by infrared and nuclear magnetic resonance spectroscopy, ozonolysis, and mass spectrometry.
The essential oil of Elephantopus scaber, a famous medicinal herb from Yangjiang County in Southern China was analyzed for the first time using GC-MS. The major constituents were hexadecanoic acid (42.3%), isopropyl dimethyl tetrahydronaphthalenol (14.1%), beta-sesquiphellandrene (8.3%), octadecadienoic acid (5.5%), and phytol (5.2%).
Analysis by Gas Chromatography and Gas Chromatography/Mass Spectrometry of the essential oils obtained from leaves of Echinodorus grandiflorus ("Chapéu de couro") from two different populations (Big Leaves and Small Leaves), collected monthly between September 1998 and December 1999 revealed 17 components. Phytol was the major constituent for both populations. The main sesquiterpene representat...
The antioxidant principles isolated from the various parts of the plant are verminoside (leaf, stem bark and flowers; EC(50) = 2.04 µg/ml), Specioside (flowers; EC(50) = 17.44 µg/ml), Kampeferol diglucoside (leaf; EC(50) = 8.87 µg/ml) and Caffeic acid (leaf and fruits). The non anti-oxidant components isolated in the study include ajugol (stem bark and fruits) and phytol (leaf).
The process of dark-induced senescence in plants is not fully understood, however, the functional involvement of an electron-transfer flavoprotein/electron-transfer flavoprotein:ubiquinone oxidoreductase (ETF/ETFQO), has been demonstrated. Recent studies have revealed that the enzymes isovaleryl-coenzyme A (CoA) dehydrogenase and 2-hydroxyglutarate dehydrogenase act as important electron donors...
Pheophytins esterified with phytol and tetrahydrogeranylgeraniol are isolated from etiolated oat seedlings after short (1 min) exposure to light and a subsequent dark period of 15 to 20 min. After saponification of the pheophytins, a mixture of the alcohols was isolated. The structure of tetra hydrogeranylgeraniol was established as 3,7,11,15-tetramethyl-zl2’14 hexadecadiene-l-ol (3a). The imp...
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