Results 171 to 180 of about 4,783 (204)

Studies of waxes. III. The alcohols of carnauba wax

Journal of the American Oil Chemists' Society, 1951
SummaryA study has been made of the composition of the non‐saponifiable portion of carnauba wax by acetylation followed by fractionation in a spinning band column, using both simple fractional and amplified distillation. The straight chain alcohols of even carbon number, C24 to C34, were estimated to be present in the following percentages, below C24 :
K. E. Murray, R. Schoenfeld
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The structural constituents of carnauba wax

Journal of the American Oil Chemists' Society, 1970
AbstractType 1 yellow carnauba wax has been separated into its structural constituents. Analyses of these constituents by a variety of conventional techniques has shown the composition to be: hydrocarbon 0.3–1%, aliphatic esters 38–40%, monohydric alcohols 10–12%, ω‐hydroxy aliphatic esters 12–14%,p‐methoxycinnamie aliphatic diesters 5–7%,p ...
L. E. Vandenburg, E. A. Wilder
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Charge Decay of Carnauba Wax Electrets

Journal of Applied Physics, 1965
The phenomenological theory of Wiseman and Feaster, based on the two-charge theory of Gross, expresses the polarization response of an absorptive dielectric as the superposition of responses to changes in the internal field, using a time-dependent specific polarization function.
Martin M. Perlman, Jean-Louis Meunier
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Characterization of Carnauba Wax Inorganic Content

Journal of the American Oil Chemists' Society, 2013
AbstractIn this work the analysis of inorganic elements (Al, Ca, Cu, Fe, K, Mg, Mn, Na and Zn) in different types of carnauba waxes (types 1, 3 and 4) was implemented. The Box‐Behnken experimental design was used to optimize the digestion of the carnauba wax sample using a microwave‐assisted approach.
Allan N. de S. Dantas, Ticiane A. Magalhães, Wladiana O. Matos, Sandro T. Gouveia, Gisele S. Lopes   +4 more
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Carnaubadiol, a triterpene from carnauba wax

Australian Journal of Chemistry, 1965
By chemical and spectroscopic methods, carnaubadiol, C31H54O2, a constituent of carnauba wax, was shown to contain one secondary and one tertiary hydroxyl group, and one isopropenyl group. A series of degradative reactions yielded a heptanorketone, identical with the known 3β-acetoxyhexanordammaran-20-one, previously obtained from dammarenediol.
CS Barnes, MN Galbraith, E Ritchie, WC Taylor   +3 more
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Synthesis of Substitute for the Carnauba Wax

Petroleum Science and Technology, 2008
Abstract The substitute for carnauba wax was synthesized by catalyzed oxidation reaction of paraffin under acidic catalyst which was present and then using physical blending. The effects of different factors on the reaction were discussed by orthogonal experimental methods and an optimum technological condition was obtained: mass fraction of catalyst ...
Y. Cong, W. Huang, K. Liao
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Carnauba Wax

1933
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Experiments on the Carnauba Wax Electret

The Journal of Chemical Physics, 1955
The strength of the applied electric field, the thickness of the slab being electrified, the time of electrification and the low temperature holding time before removing the field were varied for carnauba wax electrets. After approximately one hour the discharge current varied inversely as a power of the time since turning off the forming field, the ...
Robert Gerson, J. H. Rohrbaugh
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Studies of waxes. VI. The n‐acids of carnauba wax

Journal of the American Oil Chemists' Society, 1953
SummaryThe proportion of normal acids among the acids of carnauba wax has been found, by a chromatographic separation method, to be 38%. The normal acid mixture has been separated into its components by amplified distillation of the methyl esters, which revealed the presence of the acids of even carbon number from C18 to C30.
K. E. Murray, R. Schoenfeld
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Studies of waxes. XI. The hydroxy acids of carnauba wax

Australian Journal of Chemistry, 1955
Seven ω-hydroxy acids have been identified as constituents of carnauba wax. They are 18-hydroxyoctadecanoic, 20-hydroxyeicosanoic, 22-hydroxydooosanoic, 24-hydroxytetracosanoic, 26-hydroxyhexacosanoic, 28-hydroxyoctacosanoic, and 30-hydroxytriacontanoic acids.
KE Murray, R Schoenfeld
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