eicosane


Also found in: Wikipedia.

eicosane

[′ī·kə‚sān]
(materials)
A mixture of saturated hydrocarbons mostly straight-chained and averaging 20 carbons in the chain; for this reason, the formula C20H42 is given to the technical mixture; used in lubricants and plasticizers.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Mentioned in ?
References in periodicals archive ?
Components Caryophyllene 0.00 Diacetone alcohol 0.00 Heptadecane 1.33 Germacrene-D 0.40 Geranyl acetate 0.31 Citronellol 1.81 Nerol 2.33 Acetic acid, phenylethyl ester 0.65 Geraniol 3.37 Benzyl alcohol 0.57 Nonadecane 14.89 9-Nonadecane 3.09a Phenyl ethyl alcohol 22.16 Eicosane 1.18 Heneicosane 9.78 Tricosane 10.89 Triacontane 12.95 Tetradecanol 0.73 1-octanyl-4-ol 1.23a 2-ethyl-2-methyl-1,3-propandiol 1.07 1-octanol,2,2,dimethyl 1.20 Concrete efficiency (%) 0.34 Table 2.
RT Number (min) Name of compounds 1 15.95 Octane, 2,4,6-trimethyl 2 19.84 1,2-Bis(benzoyloxy) benzene 3 29.97 Eicosane 4 23.51 Decane, 3-ethyl-3-methyl 5 24.07 Octane, 5-ethyl-2-methyl 6 31.01 Hexacosane 7 31.52 Phenol, 2,4-bis(1,1-dimethylethyl) 8 36.85 Heptadecane 9 40.06 Naphthalene, 2,7-dimethyl 10 44.33 Hexadecanoic acid, ethyl Molecular Area Number formula (%) 1 [C.sub.19][H.sub.40] 2.78 2 [C.sub.20][H.sub.18][O.sub.2] 2.81 3 [C.sub.20][H.sub.42] 1.71 4 [C.sub.18][H.sub.38] 1.98 5 [C.sub.19][H.sub.40] 2.54 6 [C.sub.26][H.sub.54] 2.46 7 [C.sub.14][H.sub.22]O 2.90 8 [C.sub.17][H.sub.36] 3.17 9 [C.sub.13][H.sub.23N][O.sub.4] 4.11 10 [C.sub.18][H.sub.36][O.sub.2] 1.67 ester
EH4 Tetradecane, hexadecane, [14] eicosane, heneicosane, pristane, acenaphthene, phenanthrene, anthracene, and 9-methyl anthracene Haloferax sp.
Heneicosane, nonadecane, pentacosane, cyclohexadecane, tricosene, docosane, eicosane compounds from hydrocarbons; palmitic acid, ethyl oleate, octadecanoic acid, decanedioic acid compounds from aliphatic acids and their esters; cinnamic acid, ferulic acid from cinnamic acids and their esters; pinostrobin chalcone, pinocembrin, chrysin compounds from flavonoids; [beta]-eudesmol, guaiol, 2-methoxy-4-vinylphenol, l-limonene, a-muurolene, farnesol, Y-terpinene, [beta]-myrcene, a-pinene compounds from alcohols and terpenes; benzoic acid, propanoic acid, 3,4-dimethoxycinnamic acid compounds from aromatic acids; 2-nonadeca-none, 2-pentadecanone compounds from ketones were determined in the propolis sample by GC-MS.
Peak Compounds NCHC CHC 4 Methylcyclohexane [check] 59 Pentadecane [check] 70 Hexadecane [check] 89 Heptadecane [check] [check] 106 Octadecane [check] [check] 107 8-Methylheptadecane [check] [check] 128 Eicosane [check] Table 3: Phenols detected in the reaction product from NCHC and CHC ofHLR.
Peaks RT (min) Compounds Arenes 1 7.63 1,2,3-Trimethyl-benzene 2 9.27 1,2,3,4-Tetramethyl-benzene 3 9.7 1,2,3,4-Tetrahydro-naphthalene 4 9.98 Naphthalene 6 11.23 2-Methyl-naphthalene Alkane 5 11.04 Bicyclohexyl 7 11.64 Tetradecane 8 12.09 1-Cyclohexylmethyl-4-methyl-cyclohexane 9, 16 12.16 2,6,10-Trimethyl-dodecane 10 12.48 Tridecane 11 13.27 Hexadecane 12 13.64 5-Ethyl-decane5 13, 19 14.03 Octadecane 14 14.06 2,6,10-Trimethyl-pentadecane 15, 18 14.75 Eicosane 17 15.44 Pentadecane 20 22.68 Nonadecane
Among 44 identified compounds major were Pentadecane (2.70%), Tetradecane (6.77%), Heptadecane (5.64%), Tetradecane, 2, 6, 10-trimethyl (2.03%), Phenol, 3,5-bis(1,1-dimethylethyl)-(3.39%), Hexadecane, 2,6,11,15-tetramethyl-(2.03%), Hexadecane (6.77%), Pentadecane, 8-hexyl-(5.42%), Pentatriacontane (2.26%), Eicosane, 10-methyl-(3.9%), Tetrapentacontane (4.96%), Tetratetracontane (3.39%), Eicosane (7.22%), Hexatriacontane (8.58%), Tritetracontane (4.74%) and Docosanoic acid, docosyl ester (11.05%).Most of these compounds showed antimicrobial activities and contributed in plant defense mechanism (Kokate et.
The used metal foam had a porosity of 95% and the PCM is 99% pure eicosane. The PCM and the CFP were contained in a vertical cylinder where the temperature at the radial boundary was kept constant for both the melting and solidification of the PCM to the interior.
The result showed that the components were acetic acid, phenol, phenol, benzaldehyde, 2-hydroxy-, nonanal, 2-furancarboxaldehyde, 5-(hydroxymethyl)-, salicyl alcohol, phenol, 2,6-dimethoxy-, 2,5-dihydroxypropiophenone, vanillin, phenol, 2-methoxy-4-(1-propenyl)-,(e)-, ethanone, 1-(4-hydroxy-3-methoxyphenyl)-, phenol, 2,4-bis(1,1-dimethylethyl), benzeneacetic acid, 4hydroxy-3-methoxy-, methyl ester, phenol, 2,6-dimethoxy-4-(2-propenyl)-, pentadecane, 2,6,10,14tetramethyl, nonahexacontanoic acid, octacosyl heptafluorobutyrate, eicosane, 1,2-benzenedicarboxylic acid, bis 2-methylpropyl) ester, 1,4-dimethyl-8-isopropylidenetricyclo[5.3.0.0(4,10)]decane.
Among them the liquid alkanes (undecane dodecane tridecane tetradecane pentadecane hexadecane heptadecane etc.) are widely used in fuel oils and as anti-corrosive agents in lubricating oils and solid alkanes (octadecane nonadecane eicosane heneicosane tricosane tetracosane heptacosane octacosane etc.) find their use in paraffin waxes of different kinds.
An archaea (strain EH4) isolated from a salt marsh was able to degrade a higher percentage of eicosane ([C.sub.20][H.sub.42]) in the presence of yeast extract, peptone, and casaminoacids (22).