出版社：Japanese Society of Nutrition and Food Science
摘要：Carotene was given to 7 dogs orally, and the quantity of carotene in every parts ofcanal were dete rmined with an aid of chromium oxide index method. The results obtained were as follows: (1) The quantity of carotene decreased in the stomach. The rate of decrease was high for carotene olive-oil, and it was lower for green leafy vegetables. (2) Carotene decreased also in the small intestines. The decreasing rate was higher in the upper parts of the small intestines. (3) In the colon and the rectum, the results did not always show the decrease, sometimes showing even an increase. (4) Carotene found in the feces was about 10% of the taken when carotene olive-oil was given, and it was 30-70% for green leaves. (5) It was considered that the decrease in the stomach was caused by degeneration or resolution, and the decrease in the small intestines was not always caused by abs orption. Thei ncrease in the colon and the rectum may have been caused by re-excret (6) Chromium oxide was considered to be not always an adequate substance for the determination of absorption rate of carotene in the digestive canals.
