Technicians use live, chemical and physical tools to measure nutrition value at the Beltsville Research Center in Maryland.
Beltsville Maryland USA Date:1948 Duration:1 min 25 sec Sound:Yes
Research work by the Bureau of Human Nutrition and Home Economics Service (United States Department of Agriculture). Chief of the Bureau Dr. Hazel K Stiebeling talks about research in the field of food and nutrition at the Beltsville Research Center in Maryland. Technicians compare the nutritive value of foods. The measure the growth of a chicken using a machine, and that of a rat using an apparatus. A technician measures certain vitamins and amino acids using micro organisms in test tubes. Technicians use chemical methods to measure Vitamin C and small food proportions. A photoelectric calorimeter is used to measure carbohydrates in a food.
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