Abstract
African breadfruit (Treculia africana Decne) seeds were either boiled or roasted and then milled into flour. Chemical composition, functional properties and storage characteristics of raw and treated flours and the effect of partial proteolysis on selected functional properties of the raw flour were determined. Raw flour contained 20.1% crude protein, 2.5% total ash and 13.7% fat. Heat processing significantly (p<0.05) improved in vitro protein digestibility, and water and fat absorption capacities but decreased bulk density, nitrogen solubility, emulsion and foaming properties, trypsin inhibitor, and phytic acid and polyphenol contents of the samples. Boiling proved more effective than roasting for improving protein digestibility, emulsion capacity and foam stability and reducing antinutritional factor levels. Partial proteolysis increased nitrogen solubility, bulk density and water and fat absorption capacities but decreased foam capacity at hydrolysis levels greater than 35%. Fatty acid and peroxide values of the samples increased during storage. Compared to raw samples, heat processed samples had significantly (p<0.05) lower and more acceptable peroxide values and free fatty acid contents and higher and more stable water (3.0 g/g sample) and fat (2.4 g/g sample) absorption capacities.
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References
Nwokolo E (1987) Nutritional quality of the seeds of the African breadfruit (Treculia africana Decne). Trop Sci 27: 39–47.
Ikediobi CO (1981) Amino and fatty acid composition of Pentaclethra macrophylla and Treculia africana seeds. J Am Oil Chem Soc 58: 30–31.
Edet EE, Eka OU, Ifon ET (1985) Chemical evaluation of the nutritive value of seeds of African breadfruit (Treculia africana). Food Chem 17: 41–47.
Makinde AN, Elemo BO, Arukwe U, Pellet P (1985) Ukwa seed (Treculia africana) protein I. J Agric Food Chem 33: 70–72.
Giamy SY, Bekebain DA (1992) Proximate composition and functional properties of raw and processed full-fat fluted pumpkin (Telfairia occidentalis) seed flour. J Sci Food Agric 59: 321–325.
Giami SY (1993) Effect of processing on the proximate composition and functional properties of cowpea (Vigna unguiculata) flour. Food Chem 47: 153–158.
Giami SY, Okonkwo VI, Akusu MO (1994) Chemical composition and functional properties of raw, heat-treated and partially proteolysed wild mango (Irvingia gobonensis) seed flour. Food Chem 49: 237–243.
Giamy SY, Wachuku OC (1997) Composition and functional properties of unprocessed and locally processed seeds from three underutilized food sources in Nigeria. Plant Foods Hum Nutr 50: 27–36.
Narayana K, Narasinga Rao MS (1982) Functional properties of raw and heat-processed winged bean (Psophocarpus tetragonolobus) flour. J Food Sci 47: 1534–1538.
Rahma EH, Narasinga Rao MS (1983) Effect of limited proteolysis on the functional properties of cottonseed flour. J Agric Food Chem 31: 356–358.
AOAC (1984) Official Methods of Analysis, 14th edn. Washington, DC: Association of Official Analytical Chemists.
Wilson MF, Blunden CA (1983) Changes in the levels of polyphenols in three pear varieties during bud development. J Sci Food Agric 34: 973–978.
Wheeler EL, Ferrel RE (1971) A method for phytic acid determination in wheat and wheat fractions. Cereal Chem 48: 312–316.
Egan H, Kirk RS, Sawyer R (1981) Pearson's Chemical Analysis of Foods, 8th edn. London: Churchill Livingstone.
Saunders RM, Connor MA, Booth AN, Bickoff EM, Kohler GO (1973) Measurement of digestibility of alfalfa protein concentrates by in vivo and in vitro methods. J Nutr 103:530–535.
Beuchat LR (1977) Functional and electrophoretic characteristics of succinylated peanut flour proteins. J Agric Food Chem 25: 258–261.
Coffman CN, Garcia VV (1977) Functional properties and amino acid content of a protein isolate from mung bean flour. J Food Technol 12: 473–484.
Steel RG, Torrie JH (1960) Principles and Procedures of Statistics. New York: McGraw-Hill.
Oke OL, Umoh IB (1978) Lesser known oilseeds, I: Chemical composition. Nutr Rep Int 17: 293–297.
Igbedioh SO, Olugbemi KT, Akpapunam A (1994) Effects of processing methods on phytic acid level and some constituents in bambara groundnut (Vigna subterrenea) and pigeon pea (Cajanus cajan). Food Chem 50: 147–151.
Kadam SS, Smithard RR, Eyre MD, Armstrong DG (1987) Effects of heat treatments on antinutritional factors and quality of protein in winged bean. J Sci Food Agric 39:267–275.
Attia RS, Shehala AME, Arnan ME, Hamza MA (1994) Effect of cooking and decorti-fication on the physical properties, the chemical composition and the nutritive value of chickpea (Cicer arietinum L.). Food Chem 50: 125–131.
Achinewhu SC (1983) The nutritive qualities of plant foods, 2: Protein quality of breadfruit and creeping melon (Citrulus vulgaris). Nutr Rep Int 27: 541–545.
Akpapunam MA, Achinewhu SC (1985) Effect of cooking, germination and fermentation on the chemical composition of Nigerian cowpea (Vigna unguiculata). Plant Foods Hum Nutr 35: 353–358.
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Giami, S.Y., Adindu, M.N., Akusu, M.O. et al. Compositional, functional and storage properties of flours from raw and heat processed African breadfruit (Treculia africana Decne) seeds. Plant Foods Hum Nutr 55, 357–368 (2000). https://doi.org/10.1023/A:1008136608265
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DOI: https://doi.org/10.1023/A:1008136608265