A study has been made of the effects of various levels of dietary protein and calcium on the skeleton of young undernourished rats. The data for the study were obtained from physical properties of bone, from microradiographs of various parts of femur and histological sections of the bone. There were significant associations between a low protein intake and low bone mass, irrespective of calcium intake, and between a high protein intake and a high bone density at a normal calcium content of the diet. The influence of dietary protein on the composition of the bone was dependent on the calcium intake. Reduction in the protein level was associated with less trabecular bone and reduction in the calcium reduced mainly the amount of cortical bone.

Adipose tissue metabolism: influence of periodicity of eating and diet composition.

Effects of dietary protein and calcium on the skeleton of undernourished young rats

Effects of animal size, nutrition, genetics and adipose tissue site on in vitro lipolysis and NADPH generation in bovine adipose tissue

background

https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=5364&context=rtd

Biosynthesis of retinol as affected by dietary protein and feeding patterns in carotene-fed rats

The hypothesis tested was that rats offered food ad libitum and rats fed three 40 minute meals daily would eat similar amounts of food, but the ad libitum fed rats would store less fat. Fifty-four 70-day old male rats were acclimated to a reverse light-dark cycle for 1 week after which 6 were killed as initial controls. The remaining 48 were fed a diet where 40% of the energy came from fat and carbohydrate, respectively, and 20% from protein. Half of the rats were fed this diet ad libitum and half were fed the diet in three daily meals of 40 minutes duration. Twelve of the rats in each feeding pattern received a diet containing two parts safflower oil for each one part of beef tallow (P:S = 1.5) while the other 12 received a dietary fat with the reverse formulation (P:S = 0.4). Half of the rats fed each diet in each pattern of intake were stressed by immersion in 10Â° water for 30 seconds daily while the other half remained unstressed. The rats were killed after 120 days, and serum cholesterol and gains in body com ponents were compared with food intake differences. Rats fed ad libitum and those fed three 40 minute meals daily did not differ in fat-free body accumulation, but the ad libitum fed rats consumed 9.5% more energy which was converted to body fat with an efficiency of 50%. The ad libitum fed rats were fatter than rats fed three meals a day. Stress and the P:S ratio of the diet fat had no significant effect on this finding. The hypothesis was tentatively rejected. It would be necessary to extend eating period length of the three-meal-a-day fed rats until they ate the same amount as ad libitum fed rats before the hypothesis could be categorically rejected or accepted. J. Nutr. 108: 1033-1038, 1978.

A Three-Meal-a-Day Dietary Pattern Versus Ad Libitum Food Intake in the Albino Rat

Laboratory rats were fed for 2 h during the day or night. These single-meal-fed rats initially lost weight but subsequently gained weight at the same rate as ad-lib-fed control animals. Time of meal had no effect on body weight. Single-meal feeding does not lead to obesity in rats.

/pdf/body-weight-in-rats-effects-of-day-vs-night-meals-2pp66sz53r.pdf

Adipose tissue metabolism: influence of periodicity of eating and diet composition.

Citations

Effects of dietary protein and calcium on the skeleton of undernourished young rats

Effects of animal size, nutrition, genetics and adipose tissue site on in vitro lipolysis and NADPH generation in bovine adipose tissue

Biosynthesis of retinol as affected by dietary protein and feeding patterns in carotene-fed rats

A Three-Meal-a-Day Dietary Pattern Versus Ad Libitum Food Intake in the Albino Rat

Body weight in rats: Effects of day vs. night meals

Related Papers (5)

Glycogen metabolism in meal-fed rats and chicks and the time sequence of lipogenic and enzymatic adaptive changes.

Protein Measurement with the Folin Phenol Reagent

Effects of Antecedent Food Intake Pattern on Hepatic Lipogenesis

Metabolic adaptations to a "stuff and starve" feeding program. I. Studies of adipose tissue and liver glycogen in rats limited to a short daily feeding period.

Metabolic adaptations to a "stuff and starve" feeding program. II. Obesity and the persistence of adaptive changes in adipose tissue and liver occurring in rats limited to a short daily feeding period.