Results 171 to 180 of about 4,898 (220)

Carnauba wax as a wall material for urea microencapsulation

Journal of the Science of Food and Agriculture, 2018
AbstractBACKGROUNDThe high ureolytic activity of rumen microbiota is a concern when urea is used in ruminant feed, because it leads to fast urea conversion, resulting in possible intoxication and lower nitrogen utilization. This study intended to microencapsulate urea using carnauba wax to obtain slow‐release systems in the rumen.
Tiago Tavares Brito de Medeiros, Aderbal M de Azevedo Silva, André Leandro da Silva, Leilson Rocha Bezerra, Deuber L da Silva Agostini, Diego Lomonaco Vasconcelos de Oliveira, Selma E Mazzetto, Lloyd R Viana Kotzebue, Jéssica Ribeiro Oliveira, Gabriella S Barbosa Souto, Ariádne de Barros Carvalho, Antonio J Netto, Ronaldo Lopes Oliveira   +12 more
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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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A study of the alcohols of carnauba wax

Oil & Soap, 1944
1. Fractional crystallization alone is not an adequate method for isolating pure alcohols from carnauba wax.
Samuel D. Koonce, J. B. Brown
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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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On the carnauba wax eiectret

1948 Conference on Electrical Insulation, 1948
A systematic study has been made of the permanent surface charges, which can be produced on discs of carnauba wax and lead to the formation of the electret. Different electrical and thermal treatments have been used-A complete experimental cycle included a) application of the polarizing voltage concomitant with thermal treatment, b) period of short ...
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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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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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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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Production and Stability of Carnauba Wax Nanoemulsion

Advanced Science, Engineering and Medicine, 2017
The study and manufacture of nanoemulsions from regional products has the potential to develop materials with optimized properties and add value to them. In this context, we evaluated the process of obtaining and analyzing nanoemulsions of carnauba wax, a Brazilian semiarid species. The method employed was high energy by ultrasound.
Silva, Priscila de Castro e, Pereira, Lívio Antônio Silva, Carvalho, Gabriel Ribeiro de, Campelo, Pedro Henrique, Botrel, Diego Alvarenga, Oliveira, Juliano Elvis, Marconcini, José Manoel   +6 more
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