Effect of Drying Conditions on Rheological Properties of Hydrocolloids Gums from Triumfetta cordifolia and Bridelia thermifolia Barks


Triumfetta cordifolia and Bridelia thermifolia are two shrubs from tropical region of Africa. Their gums are traditionally extracted from fresh barks and used in traditional recipes (thickening and aromatization of sauces, improvement of the swelling of maize and bean cakes) and in the process of decantation of traditional beer. In order to valorize these barks in dried form, study of the effect of drying temperature on the rheological properties of their gums was carried out. In this respect, the fresh barks were dried at 40℃, 50℃, 60℃, 70℃ and 80℃ and the viscosity of their extracts was measured. The drying kinetic of the barks showed two falling rate periods represented by two drying constants k1 and k2. The absolute viscosity of the extracts decreased beyond drying temperatures higher than 70℃ and 80℃respectively for T cordifolia and B. Thermifolia. The decreasing viscosity is attributed mainly to a reorganization of polysaccharide chains. The temperatures range lower than 70℃ could be retained to dry the barks and to extract gums without deteriorating their properties.

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C. Saidou, R. Ndjouenkeu, D. Roux, J. Tchatchueng, A. Heyraud and N. Kissi, "Effect of Drying Conditions on Rheological Properties of Hydrocolloids Gums from Triumfetta cordifolia and Bridelia thermifolia Barks," Food and Nutrition Sciences, Vol. 4 No. 6, 2013, pp. 626-631. doi: 10.4236/fns.2013.46080.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] C. Saidou, J. B. Tchatchueng, R. Ndjouenkeu and C. D. Roux, “Extraction and Partial Characterization of Hydrocolloids Gums from SOme African Legumes,” International Journal of Food Engineering, Vol. 7, No. 3, 2011, p. 15.
[2] S. M. Henserson and R. L. Perry, “Agricultural Process Engineering,” AVI Publishing Co. Inc., Connecticut, 1976.
[3] R. H. Perry, D. W. Green and J. O. Maloney, “Perry’s Chemical Engineerings’ Handbook,” McGraw Hill, New York, 1984.
[4] J. Crank, “Mathematics of Diffusion,” Oxford University Press, London, 1975.
[5] R. Ndjouenkeu, F. M. Goycoolea, E. R. Morris and J. O. Akingbala, “Rheology of Okra (Hibiscus esculentus L.) and Dika Nut (Irvingiagabonensis) Polysaccharids,” Carbohydrate Polymer, Vol. 2, No. 29, 1996, pp. 263-269.
[6] E. H. Fisher and E. A. Stein, “DNS Colorimetric Determination of Available Carbohydrates in Foods,” Biochemical Preparations, Vol. 8, No. 5, 1961, pp. 30-37.
[7] S. Vandana, S. Vasundhara, P. Meenakshi, S. Rupali and S. Rashmi, “Ipomeaturpethum Seeds: A Potential Source of Commercial Gum,” Carbohydrate Polymers, Vol. 51, No. 3, 2003, pp. 357-359. doi:10.1016/S0144-8617(02)00186-8
[8] G. W. Snedecor and W. G. Cochran, “Statistical Methods,” 17th Edition, The Lowa State University Press, Ames, 1987, pp. 221-222.
[9] B. O. Duncan, “Multiple Range. F-Test,” Biometries, Vol. 11, No. 1, 1995, pp. 1-42.

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