One Hundred Studies of the Calcium, Phosphorus, Iron, and Nitrogen Metabolism and Requirement of Young Women

The present study was undertaken to add appreciably to the data available on the metabolism of calcium, phosphorus, iron, copper, and nitrogen of young women on their customary self-chosen diets. It was planned to use the figures for the retentions or losses of these dietary essentials which occurred at various levels of intake to determine the requirement of the subjects and to evaluate the adequacy of present adult dietary standards for young women. The fact that the girls were living on self-chosen diets warrants emphasis. A large proportion of the subjects were doing light housekeeping and brought much of their food supply with them from their rural homes. It is likely that their dietary practices at the university were similar to those they had followed during previous years at home and that they were adhering to their customary pattern of food habits even though cost might have modified these habits somewhat. This group offered an opportunity to study the dietary practices which had been developed during childhood and which may have had a relation to their present nutritional status

The relation of calcium and phosphorus in the diet to the cause of mottled enamel of human teeth

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Concentration of Selected Constituents in the Blood of Healthy Women 30 to 90 Years of Age in Six North Central States

The hemoglobin, red cell, total and differential leukocyte, serum protein, calcium, phosphorus and glucose values of the blood of several hundred healthy women 30 to 92 years in six North Central States were determined as one phase of a regional study of nutritional status. The mean, standard deviation and the 95 percent range (mean plus or minus two standard deviations), are shown for each constituent measured. The values for these healthy women tend to be slightly lower than values given as standards in textbooks. Differences between age groups were not significant

Reduced Ascorbic Acid Content of Potatoes Grown with and without Straw Mulching and Irrigation in Eastern Nebraska

Potatoes harvested from home gardens and in commercial early-producing fields in the Midwest are an important low-cost source of ascorbic acid from late June into September. The major portion of the early commercial crop in Nebraska (harvested mostly in August) is produced with irrigation. Straw or litter mulching is a well established practice in the nonirrigated garden and farm potato patches. The value of these cultural methods for increasing yield is well known, but prior to this study little was known about their influence on the ascorbic acid content of the tubers, or about the persistence of any such influence during the period of plant senility and during storage of the tubers