Abstract
We examined the influences of sun-beam, air and heat on the vitamin A fraction and the kitol fraction which separated by us from the unsaponifiable matter of whale liver oil as descripted in the previous paper1).
1) Influence of sun-beam.
Both the vitamin A and the kitol are very sensitive to sun-beam.
2) Influence of air.
The vitamin A is sensitive to air (oxygen) but the kitol is stable pretty.
3) Influence of heat.
At about 80°C, the vitamin A is decomposed a little but the kitol is quite stable.
