Academic literature on the topic 'Cetyl alcohol'

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Journal articles on the topic "Cetyl alcohol"

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&NA;. "Cetyl alcohol." Reactions Weekly &NA;, no. 1343 (March 2011): 12. http://dx.doi.org/10.2165/00128415-201113430-00041.

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Nernplod, Tassanee, Prasert Akkaramongkolporn, and Pornsak Sriamornsak. "Preparation of Eudragit® L Beads for Intragastric Floating Drug Delivery." Advanced Materials Research 1060 (December 2014): 79–82. http://dx.doi.org/10.4028/www.scientific.net/amr.1060.79.

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The aim of this study was to prepare matrix beads made of enteric polymer, Eudragit® L, metronidazole and various amounts of cetyl alcohol (0, 0.1 and 1%). Eudragit® L, metronidazole and cetyl alcohol were dissolved in acetone and then extruded into dichloromethane. The influence of amount of cetyl alcohol on floating and drug release behavior of matrix beads of Eudragit® L was investigated. The results showed that, after extruding, cetyl alcohol dissolved out from the beads already formed, resulting in a porous structure. Thus, the beads can float in simulated gastric fluid for more than 8 hours. Different amounts of cetyl alcohol had a slight effect on the drug release. However, the increased amount of cetyl alcohol in the formulations significantly sustained the drug release while the beads remained floating. The results suggest that Eudragit® L beads could be used as a carrier for intragastric floating drug delivery.
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Aakhus, Angela E. "Allergic Contact Dermatitis to Cetyl Alcohol." Dermatitis 22, no. 3 (May 2011): 173. http://dx.doi.org/10.2310/6620.2011.00006.

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Aakhus, Angela E., and Erin M. Warshaw. "Allergic Contact Dermatitis from Cetyl Alcohol." Dermatitis 22, no. 1 (January 2011): 56–57. http://dx.doi.org/10.2310/6620.2011.10086.

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Sulzbacher, M. "THE GUERBET REACTION OF CETYL ALCOHOL." Journal of Applied Chemistry 5, no. 12 (May 4, 2007): 637–41. http://dx.doi.org/10.1002/jctb.5010051201.

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Cai, GX, JR Freney, E. Humphreys, OT Denmead, M. Samson, and JR Simpson. "Use of surface films to reduce ammonia volatilization from flooded rice fields." Australian Journal of Agricultural Research 39, no. 2 (1988): 177. http://dx.doi.org/10.1071/ar9880177.

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This paper presents the results of experiments on the control of ammonia volatilization from flooded rice by the use of surface films of organic compounds.Preliminary experiments in evaporation pans, 1.2 m diameter, buried in an upland field of mown pasture, showed that ammonia volatilization from water could be reduced by applications of surface films of long chain alcohols; the effect increased with increasing length of carbon chain.The most effective way to add the film was to dissolve the long chain alcohol in ethanol, and to distribute the solution on the surface of the water.In an experiment in a flooded rice field, additions of cetyl alcohol dissolved in ethanol significantly reduced the rate of ammonia emission and total nitrogen loss. The effect was short-lived, probably due to microbiological decomposition of the cetyl alcohol and dispersion of the surface film by strong winds.
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Aeinlang, N., T. Srichana, and S. Songkro. "Cholesteryl Cetyl Carbonate as a Smart Material for Drug Delivery Application." Advanced Materials Research 55-57 (August 2008): 713–16. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.713.

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Cholesteryl cetyl carbonate (CCC) was synthesized from cetyl alcohol and cholesteryl chloroformate. Cholesteryl cetyl carbonate mixture (CCCM) was obtained from the reaction. CCCM was purified by liquid-liquid extraction and flash column chromatography. Thermotropic liquid crystal was formed in both pure CCC and CCCM. CCCM is composed of cholesterol, cetyl alcohol and CCC (30:20:50, weight ratio). FTIR and NMR were employed to confirm the functional groups of CCC. Thermal properties of CCC were determined by DSC and polarized light microscope. The phase transition from solid crystal to smectic appears at 42 °C, smectic to nematic appears at 54 °C and nematic to isotropic liquid appears at 73 °C. Indomethacin (IDM) could be incorporated into CCC and properties of CCC-IDM mixture stayed as liquid crystalline phase.
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Ghio, A. J., P. J. Fracica, S. L. Young, and C. A. Piantadosi. "Synthetic surfactant scavenges oxidants and protects against hyperoxic lung injury." Journal of Applied Physiology 77, no. 3 (September 1, 1994): 1217–23. http://dx.doi.org/10.1152/jappl.1994.77.3.1217.

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Injury and mortality after exposure to 100% oxygen can be diminished by surfactants that may operate by mechanisms other than those responsible for surface tension effects. We tested the hypotheses that 1) synthetic surfactant and its components function as antioxidants in vitro and 2) decrements in hyperoxic injury after treatment with a surfactant and its components are associated with decreases in oxidative stress to the lung. A synthetic surfactant (Exosurf) and its non-surface-active components tyloxapol and cetyl alcohol were incubated in an iron-containing hydroxyl radical-generating system to determine their abilities to prevent oxidation of deoxyribose. Doses of tyloxapol, cetyl alcohol, and artificial surfactant diminished the absorbance of thiobarbituric acid-reactive products of deoxyribose. Similarly, tyloxapol, cetyl alcohol, and the surfactant decreased hydroxylated products of salicylate in the same system. Rats were instilled intratracheally with saline, tyloxapol, tyloxapol plus cetyl alcohol, or artificial surfactant and immediately exposed to air or 100% oxygen. After 61 h of oxygen exposure, pleural fluid volume and wet-to-dry lung weight ratios were decreased in animals treated with surfactant and/or its components. There were also decrements in thiobarbituric acid-reactive products of lung tissue. In separate experiments, mean survival of saline-treated rats exposed to 100% oxygen was 67.3 +/- 8.1 h and > 96 h for rats given the surfactant or its components. We conclude that tyloxapol, cetyl alcohol, and Exosurf can function as antioxidants in vitro and their in vivo instillation is associated with reduction in measures of hyperoxic injury, oxidized tissue products, and mortality.
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Wang, Xiang Jun, Ming Hui Zhang, and Xi Ming Wang. "Properties of Esterificated Wood with Oxalic Acid and Cetyl Alcohol." Advanced Materials Research 123-125 (August 2010): 1187–90. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.1187.

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Two-step for wood esterification with oxalic acid and cetyl alcohol is developed in this study. The esterified wood powder was investigated by Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The results show that ester groups substituted parts of the original alcoholic hydroxyl groups, and crystallization occurred during the modification. In addition, surface wettability, moisture adsorption and water absorption tests for wood specimen have showed that the modification improves the moisture and water resistance.
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Kartika, Dwi, Triyono Triyono, Karna Wijaya, Dewi Yuanita L, and D. Setyawan PH D. Setyawan PH. "PEMANFAATAN KATALIS NI/ZEOLIT PADA HIDROGENASI KATALITIK ETIL PALMITAT MENJADI SETIL ALKOHOL." Molekul 5, no. 2 (November 1, 2010): 83. http://dx.doi.org/10.20884/1.jm.2010.5.2.80.

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The catalytic hydrogenation of methyl palmitate to cetyl alcohol using Ni supported on activated natural zeolite catalysts (Ni/Zeolite) has been carried out. In this work, the effect of catalyst amounts and H2 flow rate on methyl palmitate conversion and yield of cetyl alcohol were studied. Catalytic hydrogenation was performed in stainless steel fixed bed reactor. The methyl palmitate (10 g) was loaded into the reactor vessel at 400 °C for 30 minutes. In order to study the effects of catalyst amount at constant H2 flow rate, the catalyst were varied i.e. 5, 10, and 15 g. To investigate the effects of H2 flow rate were varied from 20, 40, and 60 mL.min-1 at constant catalyst amount. The composition of the products was analyzed by GC and GC-MS. The results showed that methyl palmitate conversion increase with the increasing of catalyst amount. The highest methyl palmitate conversion (45.62 %) and yield of cetyl alcohol (36.44 %) were obtained for 15 g catalyst and 40 mL. min-1 H2 flow rate.
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Dissertations / Theses on the topic "Cetyl alcohol"

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LE, BLANC ALAIN. "Reactions unimoleculaires en phase gazeuse, de radicaux cations bifonctionnels : beta ceto-alcool, beta ceto-esters et de cations beta ceto-acylium." Paris 6, 1988. http://www.theses.fr/1988PA066349.

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Une introduction generale sur la spectrometrie de masse precede une premiere partie portant sur l'interpretation des fragmentations de la dimethyl-3,3 hydroxy-4 butanone-2 a basse energie. Une seconde partie est reservee aux fragmentations de plusieurs beta ceto-esters diversement substitues. Dans une troisieme partie sont examinees les decompositions unimoleculaires d'ions acylium beta carbonyles de faible energie interne. L'accent est mis, tout au long de ce travail, sur le role essentiel des atomes d'oxygene dont la presence induit des ruptures caracteristiques mais aussi sert de relais aux transferts d'hydrogenes
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Figadère, Bruno. "Les composes organomanganeux mixtes : addition 1-2 selective sur des aldehydes ou des cetones portant un groupe fonctionnel, enolisation regioselective de cetones : application en synthese." Paris 6, 1987. http://www.theses.fr/1987PA066371.

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Les reactifs organomanganeux rmnx(x=cl, br, i; r=n-, sec- t-alkyl, alcenyl, aryl, alcynyl) s'additionnent aux aldehydes et cetones fonctionnels pour donner selectivement les alcools correspondant avec d'excellents rendements. Les reactifs rmnz(z=nphme) enolisent les cetones avec une excellente regioselectivite. Les enolates manganeux ainsi prepares sont tres aisement acyles, silyles, alkyles, hydroxyalkyles, avec des rendements de 60% a 90%, a la temperature ambiante
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PETIT, YVES. "Synthese d'hydroxy-2 esters enantiomeriquement purs a partir d'amino-2 acide : etude stereochimique de l'addition 1,4 d'organometalliques sur des systemes insatures-2,3 hydroxy-4." Paris 6, 1987. http://www.theses.fr/1987PA066578.

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Book chapters on the topic "Cetyl alcohol"

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Bährle-Rapp, Marina. "Cetyl Alcohol." In Springer Lexikon Kosmetik und Körperpflege, 99. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_1798.

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Fukushima, Shoji, and Michihiro Yamaguchi. "Physical Chemistry of Cetyl Alcohol: Occurrence and Function of Liquid Crystals in O/W Creams." In Surface and Colloid Science, 1–98. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1223-3_1.

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Gooch, Jan W. "Ceryl Alcohol." In Encyclopedic Dictionary of Polymers, 131. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_2170.

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"Ceryl alcohol." In Encyclopedic Dictionary of Polymers, 175. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_2131.

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