Feeding studies, sweet potato

Feeding studies. Although sweet potatoes are a significant source of calories in many parts of the world, very little information is available concerning the nutritional quality of sweet potato protein as determined by controlled feeding studies in humans. 

This is in striking contrast to numerous reported studies on the feeding of white potatoes to humans (30). An early study in which the sweet potato was used as the sole source of nitrogen in the diet of humans was that of Adolph and Liu (31.). They reported that nitrogen balance could be maintained with sweet potato nitrogen provided sufficient amounts were consumed. 

Feeding studies with the rat as the test animal verified the high nutritional quality indicated by the amino acid pattern (45). Using isolates and concentrates prepared from Jewel and Centennial cultivars, PER values were equal to that of casein (milk protein) (Table IV). Examination of the amino acid patterns of sweet potato protein and casein revealed that both contained... 

Other examples in which the whole product is used include the production of animal feeds by the protein enrichment of sweet potato residue, cassava peel, or whole cassava, or when SSF is used to remove toxic or inhibitory compoimds from feed materials, such as the reduction of phytic acid in canola meal, antidigestive constituents in rye, or caffeine from coffee pulp [187-193]. In these studies it was not made clear whether the product would be used fresh or dried. This is because the research addressed the feasibility of the process itself, and not the use of the product as food or feed. The major consideration as to whether the product will be dried is the time the product must be kept before use, and the perishability of the product... 

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