Investigation of homologous series of fatty acids by TLC. Part IV. Separation on RP18 plates with ternary mobile phases

2005 ◽  
Vol 18 (103) ◽  
pp. 228-233 ◽  
Author(s):  
Alina Pyka ◽  
Katarzyna Bober
Keyword(s):  
Fatty Acids ◽  
Homologous Series ◽  
Mobile Phases ◽  
Ternary Mobile Phases

scholarly journals Detection of a homologous series of C26-C38 polyenoic fatty acids in the brain of patients without peroxisomes (Zellweger's syndrome)

1986 ◽  
Vol 235 (2) ◽  
pp. 607-610 ◽  
Author(s):  
A Poulos ◽  
P Sharp ◽  
H Singh ◽  
D Johnson ◽  
A Fellenberg ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Homologous Series ◽  
Chemical Ionization ◽  
Carbon Chain ◽  
Ionization Mass ◽  
Before And After ◽  
Electron Impact Mass ◽  
And Function ◽  
Chain Lengths ◽  
Gas Chromatography Columns

The brains of patients with inherited abnormalities in peroxisomal structure and function contain greatly increased proportions of a homologous series of unique polyenoic fatty acids with carbon chain lengths ranging from 26 to 38. Based on evidence by chemical ionization and electron impact mass spectrometry before and after catalytic hydrogenation, and argentation t.l.c., these lipids have been tentatively identified as 26:5, 28:5, 30:5, 30:6, 30:7, 32:5, 32:6, 32:7, 34:5 and 34:6 fatty acids. A further two fatty acids eluting at very high temperatures from gas chromatography columns have been tentatively identified on the basis of their chemical ionization mass spectra as 36:6 and 38:6 fatty acids.

scholarly journals Precambrian organic compounds from the Ketilidian of South-West Greenland. Part III

1970 ◽  
Vol 82 ◽  
pp. 1-42
Author(s):  
K.R Pedersen ◽  
J Lam
Keyword(s):  
Fatty Acids ◽  
Organic Compounds ◽  
Homologous Series ◽  
Mass Spectra ◽  
Methyl Esters ◽  
Graphite Layer ◽  
Straight Chain ◽  
Normal Alkanes ◽  
Cyclic Hydrocarbons ◽  
Alkyl Benzenes

Ketilidian sedimentary rocks nearly 2000 m.y. old and only slightly metamorphosed have been shown to contain fossils and organic compounds. Results of work on organic material from a 1-3 m thick coal-graphite layer from the Foselv Formation in the Sortis Group in Grænseland are presented. Aliphatic (straight chain, branched and cyclic) hydrocarbons are dominant in the extract from two coal-graphite samples weighing about 4 kg and 10 kg respectively. Further investigations of these compounds have revealed many saturated straight-chain hydrocarbons, with the n-C15 alkane, the most abundant among the normal alkanes, ranging from C12 to about C21, and various isoalkanes and anteisoalkanes. Saturated cyclic hydrocarbons like alkyl cyclohexanes, and homologous series of alkyl benzenes and alkyl naphthalenes are also present. A series of monoterpenoid compounds is present. Six of them are fairly well characterized by their mass spectra. Fatty acids and methyl esters of fatty acids are present, notably a homologous series of straight-chain fatty acids. Branched acids are also present in minor amounts. The organic compounds further indicate that this Precambrian coal-graphite layer is the result of biological activity.

Das Bürzeldrüsensekret des Eissturmvogels (Fulmarus glacialis)

1971 ◽  
Vol 26 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Jürgen Jacob ◽  
Alfred Zeman
Keyword(s):  
Fatty Acids ◽  
Homologous Series ◽  
Complex Mixture ◽  
Preen Gland ◽  
Fulmarus Glacialis ◽  
Acidic Components

The uropygial (preen) gland fat of the fulmar (fulmarus glacialis) was shown to be a complex mixture of ester waxes. Acidic components were homologous series of 3-, 4- and 6-monomethylsubstituted, and 2,6-, as well as 3,7-dimethyl-substituted fatty acids. Besides, 2-methyl, 2,4-, 4,6-, and 4,8-dimethyl-substituted fatty acids could be detected.The alcoholic components belonged to homologous series of n-alkanols, and 2-, 4-, and 6-methyl-substituted primary alkanols. Furthermore, 14-methyl-hexadecanol could be identified.

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