ranging from 10° to -70°. 



Foulger, J. H. 



1932. Two new color tests for hexoses . 

 Journal of Biological Chemistry , 99 : 

 207-211. 

 Urea or guanidine is used in a SnC^ - 

 H2SO4 solution to give a color reaction 

 with simple hexoses. The urea reagent 

 differentiates between aldo- and keto- 

 hexoses, and the guanidine reagent gives 

 a distinct color for each sugar but does 

 not distinguish between aldo- and keto- 

 hexoses. Sensitivity varies from 0.02 to 

 0.5 mg. depending on the sugar tested. 



Frampton, V. L., R. D. Maseles, and 

 G.N. Martin 



1948. Lipides of the cottonseed. III. 

 Perchloric acid ashing of lipides for 

 the determination of phosphorus. Jour- 

 ▲ nal of the American Oil Chemists Soci- 



ety, 25: 219-220. 

 42:5689f (1948). 



Chemical Abstracts, 



The presence of HCIO4 does not interfere 

 with development of molybdenum blue color 

 in the determination of phosphorus by the 

 Fiske-Subbarow method. 



Franzke, C . and G . Ittrich 



1947. Determination of linoleic and 

 linolenic acid by means of bromine 

 ■A" addition . Fette, Seifen, Anstrich- 



# mittel , 59: 740-744. Chemical Ab- 

 stracts : 53:185121 (1959). 



Linoleic and linolenic acids are separated 

 as their bromine addition products by using 

 the difference in their solubilities in petro- 

 leum ether. 



Freeman, N. K., F. T. Lindgren, Y. C. Ng, 

 and A . V . Nichols 



1957. Serum lipide analysis by chro- 

 . matography and infrared spectrophoto- 



_ metry . Journal of Biological Chemistry , 



• 227: 449-464. 



Lipids are separated into three fractions 

 on a silicic acid-Celite column, and cho- 

 lesteryl esters, glycerides, total phospha- 

 tides, cholesterol, and free fatty acids are 

 estimated by infrared absorption measure- 

 ments. A 1 ml. sample of serum (5-10 mg. 



of total lipids) is used. A component of at 

 least 0.5 mg. is estimated to + 10% . 



Fries, J., A. Holasek, andH. Lieb 



1956. Detection of unsaturated fatty acids 

 on a paper chromatogram . Mikro - 



• chimica Acta , pp 1722-1726. Chemical 

 Abstracts, 51:4215b (1957). 



Unsaturated fatty acids on a paper chro- 

 matogram are made visible by exposing the 

 chromatogram to ozone and spraying with 

 fuchsin-sulfurous acid. 



FriseU, W. R., L. A. Meech, and 

 C. G. MacKenzie 



1954. A simplified photometric analysis 

 for serine and formaldehyde. Journal 

 of Biological Chemistry , 207 : 709-716. 

 The formaldehyde formed by oxidation of 

 serine with periodate is measured by direct 

 photometry without distillation. 



Fugger, J., J. A. Cannon, K. T. Zilch, and 

 H. J. Dutton 



1951. Analysis of fat acid oxidation pro- 

 ducts by countercurrent distribution 

 . methods. IV. Methyl linolenate. 



Journal of the American Oil Chemists 



• Society, 28: 285-289. Chemical Ab- 

 stracts, 45:106171(1951). 



The oxidation products of methyl lino- 

 lenate were fractionated by countercurrent 

 distribution with aqueous ethanol and hexane 

 as solvents. 



Galloway, L. S., P. W. Nielson, E. B. Wilcox, 

 and E. M. Lantz 



1957. Micro -determination of cholesterol 

 by use of .04 ml . of blood serum . 



" Clinical Chemistry , 3: 226-232. 



A micro -adaptation of the method of 

 Sperry and Webb (Journal of Biological 

 Chemistry, 187 : 97, 1950). 



Garton, G . A . and A . K . Lough 



1957. Analysis of mixtures of higher 

 saturated normal fatty acids: A com- 

 . pari son of re versed -phase partition 



_ chromatography and ester fractiona- 



tion. Biochimica et Biophysica Acta, 

 23: 192-195. 

 The odd-numbered n-fatty acids were 



23 



