Seher, A. 



1956. Determination of paper-chroma- 

 tographically separated long-chain 

 • carboxylic acids by photometric means . 



J Fette, Seifen, Anstrichmittel, 58: 498- 



* 504. Chemical Abstracts, 52:4211h 



(1958). 

 Fatty acids are separated by paper chro- 

 matography of their copper soaps, and the 

 separated soaps are eluted from the paper 

 and determined by photometry and polar - 

 ography . 



Silk, M . H . and H . H . Hahn 



1954. The resolution of mixtures of 

 C25-C24 normal -chain fatty acids by 

 ■^ reversed-phase partition chromatog- 



raphy. Biochemical Journal , 56 : 406- 



410. ~ 



An extension of the method of Howard and 

 Martin ( Biochemical Journal, 46: 421, 1950). 

 0^^-024 normal fatty acids are chromato- 

 graphed on a paraffin -coated kieselguhr col- 

 umn with aqueous acetone as developing 

 solvent. 



Seki, T. 



1958. Chromatographic separation of 



. lower fatty acids . Journal of Biochem - 



* istry ( Tokyo) 45: 855-860. Chemical 



• Abstracts, 53:63 26d( 1959). 



A method is described for the separation 

 of the lower fatty acids by chromatography 

 on Amberlite IRC-50 resin. 



Sheftel, A. G. 



1944. Determination of total and free 

 cholesterol. Journal of Laboratory 

 and Clinical Medicine, 29: 875-878. 



Glacial acetic acid is used to produce a 

 more stable color in the Liebermann-Bur- 

 chard reaction. 



Showell, J. S. 



1959. A uniform basis for reporting 

 analytical data on fatty materials. 

 Journal of the American Oil Chemists 

 Society, 36: 343-345. Chemical Ab- 

 stracts, _53:18513b (1959). 



A recommendation is presented for re- 

 porting of iodine number, saponification 

 number, acid number, hydroxyl number, 

 acetyl number, peroxide value, carbonyl 

 oxygen, and oxirane oxygen in basic units 

 in order to simplify the correlation of data 

 from different sources. Equations for cal- 

 culation of the numbers are given . 



Siegel, L. 



1945. The microbiological determination 

 of choline. Science, 101: 674-675. 



Constant weight is more easily attained 

 if fritted glass filters are used in place of 

 paper for filtration of the mold growth . 



Silk, M. H., H. H. Sephton, and H. H. Hahn 

 1954. South African pilchard oil . 2. 

 Concentrates of highly unsaturated 

 ^ fatty acids and alcohols derived from 



South African pilchard oil. Biochem - 

 ical Journal, 57: 574-577. 

 Urea adduct formation and lithium soap- 

 acetone fractionation are used to separate 

 the highly unsaturated fatty acids from pil- 

 chard oil. A discussion of the merits of 

 each system and comparison of their effec- 

 tiveness is given. 



Silk, M . H . and H . H . Hahn 



1954. South African pilchard oil . 3. 

 . The fatty acid composition of South 



_ African pilchard oil. Biochemical Jour - 



• nal, 57: 577-582. 



The techniques of lithium soap-acetone 

 separation, distillation, chromatography, 

 and urea adduct formation are used to sub- 

 divide the fatty acid fractions of pilchard 

 oil. The composition of the oil can then be 

 calculated without isolation of the individual 

 acids . 



Simmons, R. O. and F. W. Quackenbush 



1953. Chromatographic separation of un- 

 saturated fatty acids as their 2,4-dinitro- 

 •^ benzenesulfenyl chloride der'ivatives. 



# Journal of the American Oil Chemists 

 Society, 30: 614-616. 



The 2,4-dinitrobenzenesulfenyl chloride 

 derivatives of unsaturated fatty acids were 

 separated by chromatography on MgS04 . 

 Saturated acids did not form derivatives. 



Sinclair, R. G. andM. Dolan 

 A 1942. The so-called ether -insoluble 



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