Studies on the Lipids in Brain of Black Right Whale in the Northern Pacific Ocean

fhere have been many works on lecithin contained in the brain of human and mammal living on land as well as on lecithin in the egg of hen. The works on lecithin in the brain of human and mammal were reported by Yokoyama & Suzuki (1932 ab) md Levene & Rolf (1921, 1922). Reviewing the works on lecithin in the brain )f sea mammal, Igarashi & Zama (1955) studied on lecithin in the brain of sperm whale (Physeter catodon) and Alaskan plolack (Theragra chalcogramma). According to the works of lgarashi & Zama (1955), the characteristics of the .ecithin in the brain of sperm whale was as follows : Iodine value 71.5, Nitrogen :ontent 1.68%, Phosphorus content 3.61 %, Choline content 14.4%. Further the )resence of palmitic, stearic, oleic and eicosatetraenoic acids was confirmed and the )resence of C 20, C 22, and C 24 acids as saturated fatty acids and C20 monoenoic lcid as unsaturated fatty acids were presumed as the component fatty acids of :he lecithin. In the present work, the writers have studied the properties of the acetone;oluble lipid and phospholipids in the brain of the black right whale in the Northern Pacific Ocean. It is pleasure that the writers express here their sincere thanks to Dr. Hideo '.)mura and Dr. Akio Shionoya for their kind advices and thanks to Mr. Seiji Ohsumi who had kindly them the frozen brain of the black right whale.