Results 211 to 220 of about 4,105 (258)
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Leaf waxes in Coincya Rouy (Brassicaceae)
Botanical Journal of the Linnean Society, 1994Abstract A total of 55 populations belonging to the genus Coincya Rouy (Brassicaceae) from the Iberian Peninsula were examined for their leaf wax composition. The total wax content and the relative proportions of the five main lipid fraction, hydrocarbons, esters, ketones, free alcohols and free sterols were determined.
JAVIER VIOQUE +2 more
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Solubility of parathion in orange leaf wax
Bulletin of Environmental Contamination and Toxicology, 1977The solubility of parathion in orange leaf wax at 25°C is therefore 0.5 g/g of wax, which is equivalent to approximately a 30% solution. This high solubility and previously demonstrated in-wax-solution stability clearly demonstrate that citrus leaf waxes may be an important factor in citrus picker “reentry safety.”
J P, Okamura, D T, Sawyer, F A, Gunther
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Plant Science Letters, 1976
Abstract The effect of environmental conditions on the chemistry and morphology of Clarkia elegans leaf wax has been examined using gas liquid chromatography and scanning electron microscopy. Chemically the wax consists of a mixture of hydrocarbons, ketones, alkyl esters, aldehydes, primary alcohols and secondary alcohols of which nonacosane ...
Grace M. Hunt, P.J. Holloway, E.A. Baker
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Abstract The effect of environmental conditions on the chemistry and morphology of Clarkia elegans leaf wax has been examined using gas liquid chromatography and scanning electron microscopy. Chemically the wax consists of a mixture of hydrocarbons, ketones, alkyl esters, aldehydes, primary alcohols and secondary alcohols of which nonacosane ...
Grace M. Hunt, P.J. Holloway, E.A. Baker
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Science of The Total Environment, 2021
Several recent studies showed that leaf wax n-alkane δ2H values (δ2Hwax) within a leaf were heterogeneous in a small number of species. It still remains unclear whether the heterogeneity of intra-leaf δ2Hwax values is general for various species, how δ2Hwax values vary spatially and temporally, and whether there is a common explanation for the intra ...
Jinzhao, Liu +2 more
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Several recent studies showed that leaf wax n-alkane δ2H values (δ2Hwax) within a leaf were heterogeneous in a small number of species. It still remains unclear whether the heterogeneity of intra-leaf δ2Hwax values is general for various species, how δ2Hwax values vary spatially and temporally, and whether there is a common explanation for the intra ...
Jinzhao, Liu +2 more
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Phytochemistry, 1973
Abstract Leaf waxes from spring wheat varieties Selkirk and Manitou contain hydrocarbons (6%, 10%), long chain esters (14%, 13%), free acids (5%, 8%), free alcohols (19%, 21%), β-diketone (16%, 20%), hydroxy β-diketones (8%, 10%), unidentified gum (29%, 16.5%) and minor amounts of diol diesters, glycerides and aldehydes.
Tulloch, Alexander P. +1 more
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Abstract Leaf waxes from spring wheat varieties Selkirk and Manitou contain hydrocarbons (6%, 10%), long chain esters (14%, 13%), free acids (5%, 8%), free alcohols (19%, 21%), β-diketone (16%, 20%), hydroxy β-diketones (8%, 10%), unidentified gum (29%, 16.5%) and minor amounts of diol diesters, glycerides and aldehydes.
Tulloch, Alexander P. +1 more
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Leaf wax ketones in the genus Coincya
Phytochemistry, 1996Abstract Leaf wax ketones in the genus Coincya vary between C 22 and C 31 , and is dominated by those with an odd number of carbon atoms. The most abundant ketones are C 25 , C 27 and C 29 . The main one, C 29 , ranges from 57.7% in C. monensis subsp. cheiranthos var. setigera to 21.2% in C. monensis subsp. nevadensis .
Javier Vioque +2 more
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Interspecific variation in leaf wax of Dudleya
Biochemical Systematics and Ecology, 1979Abstract The distribution of the pentacylic triterpenoids, β-amyrin acetate and taraxerone, in the glaucous epicuticular wax of Dudleya subgenus Dudleya is correlated with both the geographic distribution and corolla tube length of a particular species. This is significant in a genus with many systematic problems.
Bruce S. Manheim +3 more
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Leaf wax alkanes in the genus coincya
Phytochemistry, 1994Abstract Leaf wax alkanes in the genus Coincya vary between C 22 and C 31 . This series is dominated by alkanes with an odd number of carbon atoms. The most abundant alkanes are C 29 , C 31 and C 27 . The main one, C 29 , ranges from 53.3% in C. monensis subsp. nevadensis to 95.0% in C. monensis subsp. recurvata var. setigera .
Javier Vioque +2 more
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Effects of leaf surface wax on leaf spectrum and hyperspectral vegetation indices
2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013Many hyperspectral vegetation indices can be used to estimate the biochemical contents such as pigment content, nondestructively. These reflectance indices are influenced by some leaf surface structure, such as wax, and the existence of the wax affects the performance of the indices on the estimation of the biochemical contents.
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Science (New York, N.Y.), 1969
The external surface of the higher plants comprises a cuticular layer covered by a waxy deposit. This deposit is believed to play a major part in such phenomena as the water balance of plants and the behavior of agricultural sprays. The wax contains a wide range of organic compounds.
G, Eglinton, R J, Hamilton
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The external surface of the higher plants comprises a cuticular layer covered by a waxy deposit. This deposit is believed to play a major part in such phenomena as the water balance of plants and the behavior of agricultural sprays. The wax contains a wide range of organic compounds.
G, Eglinton, R J, Hamilton
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