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  • Title: Changes in some antinutrients of cowpeas (Vigna unguiculata) processed with 'kanwa' alkaline salt.
    Author: Uzogara SG, Morton ID, Daniel JW.
    Journal: Plant Foods Hum Nutr; 1990 Oct; 40(4):249-58. PubMed ID: 2174152.
    Abstract:
    The effect on several anti-nutritional factors in cowpeas (Vigna unguiculata L. Walp) was investigated following treatment at 100 degrees C or 121 degrees C with solutions (0.1% w/v) of kanwa rock salt or NaHCO3 in distilled water. The concentration of polyphenols, calculated as tannic acid, was reduced substantially up to 67% under the alkaline conditions employed, but the reduction appeared to be greater (69-79%) at higher temperature. The loss of phytic acid was greater (27-40%) when beans were cooked in NaHCO3 than in kanwa (11-29%). The concentration of reducing sugars was decreased in all treatment groups especially under alkaline conditions. There was no evidence for the formation of lysinoalanine in any of the samples.
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