134 IRON BALANCE AND REQUIREMENTS IN INFANCY H UMAN iron requirements and metabolism of iron during the first 18 months of life have been the subjects of a number of reports, reviews, and commentaxies over the past decade.1#{176} Sufficient knowledge has been accumulated to permit a clear statement of dietary recommendations. Implementation of these would assure a satisfactory iron intake for t...

134 IRON BALANCE AND REQUIREMENTS IN INFANCY H UMAN iron requirements and metabolism of iron during the first 18 months of life have been the subjects of a number of reports, reviews, and commentaxies over the past decade.1#{176} Sufficient knowledge has been accumulated to permit a clear statement of dietary recommendations. Implementation of these would assure a satisfactory iron intake for t...

134 IRON BALANCE AND REQUIREMENTS IN INFANCY H UMAN iron requirements and metabolism of iron during the first 18 months of life have been the subjects of a number of reports, reviews, and commentaxies over the past decade.1#{176} Sufficient knowledge has been accumulated to permit a clear statement of dietary recommendations. Implementation of these would assure a satisfactory iron intake for t...

This study was conducted to determine the effects of various doses and particle sizes (micro or nano) of dietary zinc and zinc oxide on growth performance, serum enzyme activities, carcass characteristics, and zinc requirements in Japanese quails. A total of 576 day-old Japanese quails (both sexes) were housed in 36 deep litter floor pens. Birds received a basal corn–soybean meal diet that was ...

It is well known that the feeding ad libitum of high protein diets to rats over a period varying from several days to several weeks produces an increase in the activities of enzymes involved in amino acid catabolism (3-8). Studies in our laboratory have shown that at least two amino -acid-catabolizing enzymes, threonine dehydrase and ornithine transaminase, can be elevated to high levels within...

—Many songbirds are seasonally frugivorous and eat primarily fruit during migration and insects or seeds during nonmigratory periods. Previous work has suggested that most wild fruits may have inadequate protein for birds. Assessing the nutritional adequacy of fruit requires knowing the protein requirements of birds in relation to the composition of available fruits. We tested predictions of tw...

I . A combination of balance and isotope techniques has been used to study the effects of age and dietary calcium content on Ca metabolism in forty-two wether sheep. 2. The amount of Ca absorbed by young growing animals varied significantly with intake. The percentage of the dietary Ca absorbed, however, remained unchanged. In older animals the amount of Ca absorbed was not altered by changes i...

It is well known that the feeding ad libitum of high protein diets to rats over a period varying from several days to several weeks produces an increase in the activities of enzymes involved in amino acid catabolism (3-8). Studies in our laboratory have shown that at least two amino -acid-catabolizing enzymes, threonine dehydrase and ornithine transaminase, can be elevated to high levels within...

Using the recommended daily allowance (RDA) to assess dietary adequacy implies making a direct comparison between RDA and some measure of dietary intake. The value and usefulness of doing so must clearly depend on the limitations of each. By definition the RDA are intended to cover ‘the average amount of the nutrient, which should be provided per head in a group of people if the needs of practi...

Dietary surveys in low-income countries (LICs) are hindered by low investment in the necessary research infrastructure, including a lack of basic technology for data collection, links to food composition information, and data processing. The result has been a dearth of dietary data in many LICs because of the high cost and time burden associated with dietary surveys, which are typically carried...