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Effects of Varying Fermentation Periods on the Chemical Composition of African Yam Bean (Sphenostylis stenocarpa) and Acha (Digitaria exilis) Flour Blends and Sensory Properties of Their Products
Abstract:The study evaluated the effects of varying fermentation periods on the nutrients and anti-nutrients composition of African yam bean (Sphenostylis stenocarpa) and acha (Digitaria exilis) flour blends and sensory properties of their products. The African yam bean seeds and acha grains were fermented for 24 hrs, 48 and 72 hrs, dried (sun drying) and milled into fine flour. The fermented flours were used in a ratio of 70:30 (Protein basis) to formulate composite flour for meat pie and biscuits production. Both the fermented and unfermented flours and products were analyzed for chemical composition using the standard method. The data were statistically analyzed using SPSS version 15 to determine the mean and standard deviation. The 24, 48, and 72 hrs fermentation periods increased protein (22.81, 26.15 and 24.00% respectively). The carbohydrate, ash and moisture contents of the flours were also increased as a result of fermentation (68.01-76.83, 2.26-4.88, and 8.36-13.00% respectively). The 48 hrs fermented flour blends had the highest increase in ash relative to the control (4.88%). Fermentation increased zinc, iron, magnesium and phosphorus content of the flours. Treatment drastically reduced the anti-nutrient (oxalate, saponin, tannin, phytate, and hemagglutinin) levels of the flours. Both meat pie and biscuits had increased protein relative to the control (27.36-34.28% and 23.66-25.09%). However, the protein content of the meat pie increased more than that of the biscuits. Zinc, Iron, Magnesium and phosphorus levels increased in both meat pie and biscuits. Organoleptic attributes of the products (meat pie and biscuits) were slightly lower than the control except those of the 72 hrs fermented flours.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1126497Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 732
 Osagie, A.U. (1998) Anti-nutritional factors: In Nutritional quality of plant foods (Osagie and Eka Eds.) Post-harvest Research Unity University of Benin, Benin City Nigeria pp 221-244.
 Wardlaw, G.M. and Kessel, M. (2002). Perspective in Nutrition (5thed) McGraw. Hill, Boston, Pp. 271-274.
 Eneobong H.N and Obizoba I.C. (1996) Effect of Domestic Processing on the cooking time, nutrients, anti-nutrients and in -vitro protein digestibility of the African yam bean (Sphenostylis stenocarpa). Plant food for Nutrition 49:43-52.
 Temple V.J and Bassa J.D. (1997) Proximate Chemical composition of acha (Digitaria exilis) grain. J. Sci food Agric. 56:561-563
 Enwere, N.J. (1998). Foods of plant origin. Nsukka Afro-Orbis pub. Ltd. Pg 160-168.
 Ihekoronye, A.I., and Ngoddy, P.O. (1983) Integrated food Science and technology for the tropics. Macmillan Publishers Ltd. London, Pp 236-254.
 Obizoba I.C and Atti J.V (1991) Effect of Soaking, Sprouting, Fermentation and Cooking on the Nutrient Composition and some Anti-Nutrient Factors of Sorghum (Guinesia) Seeds Plant Food. Hum. Nutr. 41:203–211.
 AOAC (2000) Official Methods of Analysis, Association of Official Analytical Chemists, Washington DC.
 Ranjiham, S. K. and Gopal K. (1980) Wet chemical digestion of biological materials for mineral analysis; in laboratory manual for nutrition research Vikas Pub. House, PVT Ltd, New Delhi India.
 Price, M.L and Buttler L.G (1980) Rapid visual estimation and spectrophotometer determination of tannin content of sorghum grain. J. Agric. Fe. Chern. 25: 1268 -1270.
 Pomeranz, Y. and Meloan, C.E. (1994) Food Analysis: Theory and Practice (3rd Ed.), Chapman & Hall ISBN 0-412-98551-9.
 Odo and Ishiwu (1999) Food and Water Analysis. I.M.T Press. Enugu, Nigeria, 1999.
 Frazier W.C and Westhoff , D.C (1978) Food Microbiology. McGraw Hill Pub. Co Ltd., New York.
 Hamad A.M and Fields M.L (1979) Evaluation of Protein Quality and Available Lysine of Germinated and Fermented Cereals. Journal of Food Science, 44:456-459.
 Obiakor P.N (2001) Nutritional and Organaloptic Evaluation of Fermented Baobob, Rice, Maize flours and their products. M.Sc. Thesis, Dept. of Home Science and Nutrition, University of Nigeria Nsukka.
 Obizoba I.C and Egbuna H.T (1992) Effect of germination and fermentation on the nutritional quality of Bambara nut (Vaandonia subterranean) and its products Plant Food. Hum. Nutr. 42:13-23.
 Obiakor- Okeke, P. N. (2014). Comparative Evaluation of Chemical and Functional Properties of Some Lima Bean Varieties
 P. N. Obiakor-Okeke (2014) (Phaseolus lunatus) Consumed in Arondizuogu, Imo state, Nigeria Journal of Food and Nutrition Sciences. Vol. 2, No. 4, 2014, pp. 168-172. DOI: 10.11648/j.jfns.20140204.21
 Roday, S. (2007). Food science and nutrition. Oxford University Press, New Delhi, India. Pp. 90-95.
 Eka O.U (1980). Effect of fermentation on the nutrient status of locus beans. Food Chem., Vol. 5, pp. 308.
 Lorrenz W.S (1993): Nutritional and Microbiological Evaluation of Fermented Weaning Foods, Chalmers Bibiliokets Repro. Service, Gentebory, Sweden
 Nnam N.M (1994) Nutritional and organoleptic evaluation of fermented products and composite flours developed from plant foods. Ph.D. Thesis, Dept. of Human Science and Nutrition, University of Nigeria Nsukka.