ISSN:
1433-8580
Keywords:
Amino acids
;
Plasma amino acid response
;
Nitrogen balance nutrition
;
Diet
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary For supplementary weaning foods, Faffa (Ethiopia), Incaparina (Guatemala), Superamin (Egypt) and Sekmama (Turkey), were studied with regard to protein quality. Three different methods for protein quality evaluation were used. 1. Chemical analysis of the essential amino acid content. Amino acid scoring of the results indicated that the sulphur-containing amino acids were limiting in Faffa (77%); lysine, threonine and isoleucine in Incaparina (77–75%); threonine in Superamin (80%) and threonine and the sulphurcontaining amino acids in Sekmama (90%). 2. Standardized nitrogen balance procedure using laboratory rats. The net protein utilization of the four weaning foods were all in the range 56–70%. Methionine supplementation (1 g/100 g protein) did not significantly improve the biological value of the test diets, but resulted in marked decreased levels of blood urea nitrogen (except for Incaparina), and decreased urinary excretion of urea nitrogen compared to total nitrogen excretion (except for Superamin). 3. Single meal plasma amino acid responses in healthy young adults. The responses of the essential amino acids after test meals with the four weaning foods were all within a range considered to indicate a well balanced supply of dietary amino acids, except for marginal deficits of methionine after the Faffa test meals, and isoleucine after the Incaparina test meals.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01851323
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