Einfluß von zwei Spezialdiäten auf das Körpergewicht von Ratten

Abstract

The authors studied the effects of 2 special diets on the weight behaviour of male Wistar rats (aged 4--5 weeks) from Schönerlinde near Berlin up to the age of 35 weeks. The weight behaviour of rats fed a standard diet (commercially available pellets) lies between those of the experimental rats and near that of the rats on low-fat (3%) diet. The one special diet that contains 3% of fat is low-fat (8.4% of the gross energy of the feed) and high-protein (69.3% of the gross energy); the other diet that contains 50% of fat is high-fat (76% of the gross energy). The two diets (containing 331 and 612 kcal/100 g, respectively) are not isocaloric but the animals on the low-fat diet ate twice as much as the animals on the high-fat diet. The rats on the high-protein low-fat diet were prone to copious sweating. It was generally noticed that the animals on the high-fat diet became to a greater extent hypokinetic with increasing age. The weight difference between the two dietary groups increased with increasing age, reaching its maximum value (77%) at the age of 24 weeks and then decreasing to 60% (at the age of 35 weeks). Up to the age of 12 weeks, the rats are in the more "dynamic" phase of weight increase; and from the 16th week, in the more "static" phase of weight increase.

Fatty acid composition of liver and adipose tissue lipids in Wistar rats with fat diet‐induced obesity

“…From the 6th week of age either for 4 weeks or for 19 weeks the rats were fed a low-fat (3 ' %, fat) or a high-fat diet (50 fat), respectively, containing a blend of nearly equal parts of sunflower oil and lard. The diet, used by VOSS et al [4] consisted of approximately equal parts of saturated, monounsaturated and polyunsaturated fatty acids, which included about 37 "/, linoleic, 29 "/, oleic, 15 "/, palmitic and 11 "/, stearic acid as major components. The fatty acid profiles of the high-and the low-fat diet were identical.…”