Comparative Nutrition Commons^™

The Influence Of Various Factors On Nitrogen Balance And Protein Quality Measured In Adult Human Beings, Arthur John Wittwer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effect of nitrogen intake, nitrogen source, calorie intake, body weight, adaptation time, research group and sex on the nitrogen balance of human adults was investigated. Data from studies reported in the literature were combined and analyzed statistically by multiple regression techniques. Analyses were made separately for six sources of nitrogen: egg, beef, rice, corn, wheat and wheat gluten.

Nitrogen intake, caloric intake and body weight exerted significant effects on nitrogen balance (5% level of confidence) for six, three and two of the six nitrogen sources, respectively. Other variables were not significant at the 5% level. Although differences were not …

The Relationship Of Molybdenum To Iron Status In Pregnancy And Anemia In Rats And Humans, Jo Ann Mortensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Weanling male rats were made anemic and fed diets supplemented with 20 ppm iron and/or 2 ppm molybdenum. A decrease in serum iron was observed in the rats supplemented only with iron and a significant decrease in hemoglobin was observed in rats given no supplementation.

In a second experiment, pregnant female rats were also fed diets supplemented with 20 ppm iron and/or 2 ppm molybdenum. An inverse relationship was apparent between iron and copper in both the serum and the liver of the female rats. The livers of their pups displayed an inverse relationship between molybdenum and copper. Hemoglobin in …

Milko-Tester Analysis Of Milkfat Content Of Churned And Nonchurned Samples From Jersey And Holstein Dairy Cattle, Kazuko Monobe

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Milk samples from three Jersey and three Holstein herds were used to determine if the degree of churning correlated with the initial milkfat assay, and also to determine if the churned milkfat could be measured as accurately as the initial milkfat using the Milko-Tester.

Regression lines for the initial milkfat test versus churned milk- fat test fit polynomial curves. The degree of churning was greater for Jerseys than Holsteins and correlated with the initial milkfat test.

The repeatability of initial milkfat tests vas 0.98 for Jerseys and 0.99 for Holsteins. However, the repeatability of churned milkfat tests was lower for …

A Field Study In The Use Of Dietary And Urinary Variables In Determining Osteoporosis In Elderly People, Jane Steger Osborn

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three-day dietary records were analyzed for nutrient content and 24 hour urine samples were analyzed for calcium, phosphorous, total nitrogen, and free alpha-amino nitrogen for 210 elderly people. Dietaries and urine samples were collected twice, October and March at five month intervals, for each subject. Increases were found in both dietary intake and urinary components October to March. Based on a criteria of high dietary protein, low dietary calcium, high urinary nitrogen and low calcium, 23 subjects were selected as osteoporotic and and 25 were selected as non-osteoporotic. This method of prediction was not supported by radiological evaluations.

Bone density …

The Affect Of The Placement Of Food On The Tray And The Scheduling Of Playtime On Plate Waste And Nutrient Intake By Elementary School Children, Elise Walton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

For three weeks the plate waste from the students at the Edith Bowen Laboratory School was collected. The students were divided into three units by grade; Unit I, kindergarten and first grade, Unit II, second and third grade; and Unit III, fourth through sixth grade. The total waste of the individual menu items in the three units was weighed to determine the total waste of each food item for the unit. In each unit individual food items from three control trays weighed together, and an average serving portion for the item in each of the three units was obtained.

The …