Effect of animal fat and vegetable oil as well as ratio of three calorigenic nutrients on growth and metabolism of white rats was observed for 10 weeks, exposing half of them to vibration circumferance.
Ratio of animal fat, vegetable oil, and protein (score 90 and 70) fed to 6 groups were as follows:
1. A90: animal fat lard 30%, protein score 90 30%
2. V90: vegetable oil 30%, protein score 90 30%
3. V70: vegetable oil 30%, protein score 70 30%
4. Low fat low protein: vegetable oil 5%, protein score 70 12%
5. Low carbohydrate: vegetable oil 30%, protein score 90 53%
6. Extra low carbohydrate: vegetable oil 30%, protein score 90 63%
Growth rates of these groups were superior almost in this order, though the vibration made their growth rate of each group retard by a few per cent.
First group fed on animal fat showed the best growth, and even the exposed group to the vibration fed on animal fat also grew up more than other groups.
Specific gravities of whole blood were also proportional to their growth rates, and serum cholesterol concentration was found higher in the animal fat group than in vegetable oil group.
Xanthin oxidase activity of liver was distinctly low in low fat low protein group and each group exposed to vibration.
Suprarenal glands were largest in low fat low protein group and low carbohydrate group, and vibration always made the glands larger in comparison with the contrast group.
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