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Nutritional evaluation of the protein of dried tomato pomace in the rat

Published online by Cambridge University Press:  09 March 2007

N. J. Drouliscos
N. J. Drouliscos
Affiliation:
Department of Biology, Nuclear Research Centre ‘Democritos’, Aghia Paraskevi, Attiki, Greece
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Abstract

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1. Nutritional evaluation of dried tomato pomace (DTP-20) as a source of protein was carried out using weanling rats. Comparisons were made with casein (CS), soya-bean meal (SOM-45) and the hydrocarbon-grown yeast Toprina (BP-T). The growth-promoting effects of the diets were evaluated over a period of 28 d of ad lib. feeding.

2. The unsupplemented DPT-20 had a protein efficiency ratio (per) of 2.18±0.13 and a net protein utilization (npu) of 0.55. The addition of dlmethionine (5 g/kg) resulted in a per of 1.74±0.15 (t 2.99, P < 0.01) and a npu of 0.40, while the addition of an amino acid mixture resulted in a per of 2.33±0.08 (t 1.84, P < 0.1) and a npu of 0.70.

3. The reason for the decrease in growth and the reduced per and npu values recorded for the methionine-supplemented group of rats is not clear and it is discussed in connexion with an imbalance or a slight toxicity caused by the added amino acid.

Type
Papers of direct relevance to Clinical and Human Nutrition
Information
British Journal of Nutrition , Volume 36 , Issue 3 , November 1976 , pp. 449 - 456
Copyright
Copyright © The Nutrition Society 1976

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