Plant Foods for Human Nutrition

, Volume 42, Issue 2, pp 183–192 | Cite as

Studies on weaning diets in Nigeria: 2 protein sources

  • S. R. A. Adewusi
  • B. O. Orisadare
  • O. L. Oke


Protein isolates were extracted from melon, groundnut, and soybean cakes in an aqueous system that could potentially yield both oil and protein from oilseeds quantitatively. Protein isolates obtained were 91.2, 78.6 and 79.5% of the total protein content of melon, groundnut and soybean cakes respectively. Both cakes and isolates were assessed in a rat bioassay while breadfruit, cassava, and corn starch were also investigated as sources of carbohydrate. Results showed that there were no significant differences between feed intake, weight gain and PER of rats fed the cake and the protein isolates except in soybean. Weight gain, PER and NPR were highest in cassava-soybean protein isolate diet followed by cassavacasein diet (control) while performance was only moderate with melon- and groundnutcassava diets. With melon protein isolate, cassava and breadfruit were better carbohydrate sources than corn starch. In simulated weaning diets, cassava-sucrose-melon-soybean protein isolate based diet performed better (weight gain 33.4 g, PER 1.63, NPR 2.23) than a commercial weaning food (weight gain 30.6 g PER 1.57, NPR 2.18) while replacement of sucrose and cassava at 30% by breadfruit yielded a cost effective diet with good performance (weight gain 29.4 g, PER 1.51, NPR 2.12). Diets where soybean protein served as the sole source of protein or breadfruit, white and yellow maize ‘ogi’ served as the main source of carbohydrate performed only moderately.

Key words

oilseed protein isolates cassava breadfruit bioassay 


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  1. 1.
    UNICEF (1989) The State of the World's Children, Geneva, UNICEFGoogle Scholar
  2. 2.
    Rhee KC, Cater CM, Mattil KF (1972) Simultaneous recovery of protein and oil from raw peanuts in an aqueous system. J Food Sci 37: 90–93Google Scholar
  3. 3.
    Adewusi, SRA, Orisadare BO, Oke OL (1990) Studies on weaning diets in Nigeria 1. Carbohydrate Sources. Cereal Chem 68: 165–169Google Scholar
  4. 4.
    Association of Official Analytical Chemists (1975) Official methods of analysis 12th edn. Washington DC, AOACGoogle Scholar
  5. 5.
    Adewusi, SRA, Oke OL (1985) Lysine in cassava based diets: II: The Nutritional evaluation of acetylated casein in maize meal, corn starch and cassava based diets. Food Chem 16: 25–36Google Scholar
  6. 6.
    FAO (1970) Amino acid content of foods and biological data onproteins. FAO Nutritional Studies No 24, Rome, FAOGoogle Scholar
  7. 7.
    Oyenuga VA (1968) Nigeria's Foods and Feeding Stuffs. 3rd edn. Ibadan, Ibadan University PressGoogle Scholar
  8. 8.
    Adegbola AA, Oke OL (1973) Preliminary observations on the value of leaf protein-fish mixtures as protein supplements for pullets. Nutr Rep Intl 8: 313–318.Google Scholar
  9. 9.
    Adewusi SRA, Oke OL (1980) The effect of various levels of cassava on protein utilization by rats. Nutr Rep Intl 21: 709–715Google Scholar
  10. 10.
    Onyekwere OO, Edwards CC (1979) ‘SOY-OGI’ A corn-soya Nigerian weaning food (A review) Technical Memorandum No 30. Oshidi, Lagos. Federal Institute of Industrial Research, NigeraGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • S. R. A. Adewusi
    • 1
  • B. O. Orisadare
    • 1
  • O. L. Oke
    • 1
  1. 1.Department of ChemistryObafemi Awolowo UniversityIle-IfeNigeria

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