Results 271 to 280 of about 19,540 (309)

C-Methyl-flavonoids from the leaf waxes of some Myrtaceae

Phytochemistry, 2000
The thin waxy coatings on leaves of nine species of Callistemon, two of Melaleuca and one species of Metrosideros, have been studied for the occurrence of leaf surface flavonoids. The Callistemon species and Metrosideros robusta exhibit only C-methylated flavonoids, while O-methyl flavonoids were detected in Melaleuca huegelii. The new natural C-methyl
Wollenweber, E., Whede, R., Dorr, M., Lang, G., Stevens, J.F.   +4 more
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Composition of leaf epicuticular waxes of Pteridium subspecies

Phytochemistry, 1987
Abstract The leaf epicuticular waxes of two subspecies of Pteridium consisted principally of alkyl esters (92 %; C 40 –C 50 ) together with small amounts of n -alkanols (2 %; C 24 –C 32 ) and hydrocarbons (2%; C 27 –C 31 ). The esters comprised C 22 –C 32 alkanols randomly combined with C 20 – C 24 fatty acids.
Edward A. Baker, Robyn E. Gaskin
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Leaf wax alcohols inCoincya (Brassicaceae)

Journal of the American Oil Chemists' Society, 1994
AbstractFree and ester alcohol compositions have been determined for leaf waxes in ten taxa belonging to the genusCoincya (Brassicaceae) on the Iberian Peninsula (Spain and Portugal). Size of leaf wax alcohols in the genusCoincya varies between 20 and 31 carbon atoms. This series is dominated by alcohols with an even number of carbon atoms.
Javier Vioque, Julio Pastor, Eduardo Vioque   +2 more
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Leaf wax ofPortulaca oleracea

Lipids, 1974
AbstractWax coating the leaves and stems ofPortulaca oleracea consists of hydrocarbons (21%), esters (53%), acids (2%), alcohols (4%), diol monoesters (2%), and unidentified material (15%). Lesser amounts of esterified and free β‐amyrin and lupeol, stigmast‐4‐en‐3‐one and free diols also are present.
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Leaf wax n-alkane extraction: An optimised procedure

Organic Geochemistry, 2017
Abstract Leaf wax n-alkanes are often extracted from modern plant material to describe their natural occurrence and understand the factors determining their potential as biomarkers for climate reconstruction. Despite several studies on the topic no standardised approach for n-alkane extraction from leaves has been yet devised.
Nicolò Ardenghi, Andreas Mulch, Jörg Pross, Eva Maria Niedermeyer   +3 more
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Diesters of diols in wheat leaf wax

Lipids, 1971
AbstractDiesters have been isolated from the leaf wax of spring wheat,Triticum aestivum, L. (Selkirk variety) by chromatography. The diesters, which form 3% of the wax and which were shown by gas liquid chromatography to be a mixture of C51−C60 esters, consist largely oftrans 2‐docosenoic andtrans 2‐tetracosenoic acid esters of 1,9‐nonanediol, 1,10 ...
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Inheritance of Leaf Epicuticular Wax Content in Rice

Crop Science, 1992
Leaf epicuticular wax (EW) is a trait related to drought resistance. Epicuticular wax content is low in rice (Oryza sativa L.) relative to other crops, but great differences among rice cultivars have been observed, as great as 100%. Traditional drought‐resistant upland rices have relatively higher EW content than modern irrigated lowland rices.
M. Mahiul Haque, David J. Mackill, Keith T. Ingram   +2 more
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Long-chain alkanediols from Myricaria germanica leaf cuticular waxes

Phytochemistry, 2000
In the leaf cuticular waxes of Myricaria germanica L. four different series of alkanediols were identified: (1) hentriacontanediol isomers with one functional group in the 12-position and a second group in positions ranging from 2 to 18, (2) C30-C34 alkanediols carrying one hydroxyl function on a primary and one on a secondary carbon atom.
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Chemotaxonomic significance of leaf wax alkanes in the gramineae

Biochemical Systematics and Ecology, 1996
Abstract Leaf wax alkanes were determined in several species of the grass family (Gramineae) and used as chemotaxonomic characters. Leaf wax alkanes were extracted with hexane and determined by GC-MS on a data set including 93 species belonging to five subfamilies: Bambusoideae, Pooideae, Arundinoideae, Chloridoideae and Panicoideae.
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An apparent seleniferous leaf wax from Stanleya bipinnata

Biochemical and Biophysical Research Communications, 1963
Selenium75 was used as a tracer to demonstrate that Se is intimately associated with leaf wax from Stanleya bipinnata, a member of the mustard family. Results are reported from studies that suggest, but do not conclusively prove, that Se is a chemical part of the wax molecules.
R.J. McColloch, J.W. Hamilton, S.K. Brown   +2 more
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