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Journal of Nutrition Vol. 34 No. 6 December 1947, pp. 715-724
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Nutritional Studies on Milk Fat

III. The Effect of the Treatment of Milk Fat with Certain Solvents on the Growth of Young Rats

Five Figures

E. L. Jack and E. B. Hinshaw

Division of Dairy Industry, University of California, Davis

1. Experiments have shown that pentane (Skelly-Solve A) contains an impurity which lowers the growth-promoting value of milk fat. The oxidative stability is also lowered.
2. Purification of the solvent by treating with fuming sulphuric acid removes this deleterious component.
3. Fat dissolved in purified pentane is not reduced in oxidative stability nor in growth-promoting value.
4. The -53° filtrate milk-fat fraction prepared with purified pentane produced significantly greater growth in young rats than the original milk fat and also greater than the other milk fat fractions.
5. Young rats fed a diet containing -53° filtrate milk-fat fraction used their feed more efficiently for growth than those fed diets containing the original milk fat and the other fractions.

Manuscript received 4 August 1947.




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