. alumni journal. Columbia University. College of Pharmacy; Pharmacology. C. U. C. p. ALUMNI JOURNAL 249. Conducted by Prof. George C. Diekman. Shark Liver Oil. M. Tsujimoto, in /. Ind. Eng. Chem., 1916, calls attention to a highly unsat- urated hydrocarbon present in shark liver oil. This hydrocarbon, named "squalene," is found in some shark-liver oils, and can be produced in Japan in commercial quantities, by distilling the oils which contain it, under reduced pressure, or with superheated steam, and treating the distillate with alkali to re- move free fatty acids. The hyd
. alumni journal. Columbia University. College of Pharmacy; Pharmacology. C. U. C. p. ALUMNI JOURNAL 249. Conducted by Prof. George C. Diekman. Shark Liver Oil. M. Tsujimoto, in /. Ind. Eng. Chem., 1916, calls attention to a highly unsat- urated hydrocarbon present in shark liver oil. This hydrocarbon, named "squalene," is found in some shark-liver oils, and can be produced in Japan in commercial quantities, by distilling the oils which contain it, under reduced pressure, or with superheated steam, and treating the distillate with alkali to re- move free fatty acids. The hydrocarbon is readily soluble in ether, acetone, petroleum ether and carbon tetrachloride. It is only sparingly soluble in alcohol and glacial acetic acid. When mixed with I per cent, of cobalt resinate, it produces, even at low temperatures, a smooth, colorless film, in about 10 days. This film was much firmer than one ob- tained from fatty oils. Complete hydro- genation of squalene results in the pro- duction of an oil-like substance, re- sembling liquid paraffin. When sub- jected to a temperature of —80° C. this oil-like product becomes a transparent jelly, resuming its mobile character at about —35° C. J' Detection of Arachis Oil. The presence of arachis oil, in quan- tity as low as 5 per cent, in olive oil, cottonseed oil, soya bean oil and corn oil, may be detected as follows: About 20 grammes of the suspected oil are saponified by aid of alcoholic potassium hydroxide solution, and the excess of alkali neutralized by aid of a 25 per cent, solution of acetic acid in 95 per cent, alcohol, phenolpthalein being employed as indicator. The mixture is then treated with 50 mils of a 5 per cent, solution of magnesium acetate in a mixture of equal parts of water and 95 per cent, alcohol. After heating to boiling, it is allowed to cool to room temperature with occasional shaking, and then set aside for about 24 hours at a temperature of about 10 to 15° C. The resulting precipit
Size: 4554px × 549px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcol, bookdecade1910, booksubjectpharmacology
