Physical, thermal and functional properties of flour derived from Ubi Gembili (Dioscorea esculenta L.) tubers grown in Indonesia


  • Diah Susetyo Retnowati Universitas Diponegoro, Faculty of Engineering, Department of Chemical Engineering, Prof. H. Soedarto, SH Road, 50275 Semarang
  • Andri Cahyo Kumoro Universitas Diponegoro, Faculty of Engineering, Department of Chemical Engineering, Prof. H. Soedarto, SH Road, 50275 Semarang
  • Ratnawati Ratnawati Universitas Diponegoro, Faculty of Engineering, Department of Chemical Engineering, Prof. H. Soedarto, SH Road, 50275 Semarang



Dioscorea esculenta, flour, physicochemical properties, functional properties, thermal properties


Gembili (Dioscorea esculenta L.) tuber is one of the important food sources in term of cultural, nutritional and economic perspectives for the people in the Africa, Caribbean islands, Asia, and Oceania regions. The tubers can be eaten after being boiled, roasted, fried or cooked. However, there is lack of information on the advanced utilizations of the tubers as raw material in the manufacture of modern foods. This study aims to characterize the physical, functional and thermal properties of Gembili flour, so that this information can be used as the basis in the development of novel foods. The microstructure, crystallinity, gelatinization temperature, swelling power and solubility of the flour were determined. The electron microscope observation revealed that Gembili flour consisted of smooth surface oval granules, which were light brown in color and having 23 µm average diameter. They are comprised of polygonals or some clusters of irregular fragments. Similar to most of tuber flours, Gembili flour also exhibited B-type crystallinity with approximately 31 ±3.7% crystallinity. The gelatinization temperature of Gembili flour was high and being comparable to that of cereal flour. The enthalpy of gelatinization of Gembili flour (9.52 ±0.80 J.g-1) was comparable to that of Dioscorea alata. Unfortunately, Gembili flour exhibited low swelling power (3.90 ±0.01 g.g-1). The Gembili flour granules were highly soluble in water (11.07 ±0.05%). Based on those reported properties, Gembili flour can be a suitable raw material for the manufacture of bakery, cookies, noodle and infant foods.


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Abiodun, O. A., Akinoso, R., Oluoti, O. J. 2014. Changes in functional and pasting properties of trifoliate yam flour during storage. Journal of Applied Science & Environmental Management, vol. 18, no. 2, p. 337-340.

Achy, J. Y., Ekissi, G. S. E., Koffi, P. K. B., Koné, F. M. T., Kouamé, L. P. 2017. Effect of boiling and baking times on the functional properties of aerial yam (Dioscorea bulbifera) flours cv Dugu-won har vested in Côte d'Ivoire. International Journal of Agronomy and Agricultural Research, vol.10, no. 2, p. 1-17.

Adeleke, R. O., Odedeji, J. O. 2010. Functional properties of wheat and sweet potato flour blend. Pakistan Journal of Nutrition, vol. 9, no. 6, p. 535-538.

Afoakwa, E. O., Budu, A., Asiedu, S., Chiwona-Karltun, C., Nyirenda, D. B. 2012. Viscoelastic properties and physicfunctional characterization of six high yielding cassava mosaic disease-resistant cassava (Manihot esculenta Crantz) genotypes. Journal of Nutrition and Food Science, vol. 2, no. 2, p. 129.

Akissoe, N., Hounhouigan J., Mestres C., Nago M. 2003. How blanching and drying affect the colour and functional characteristics of Yam (Dioscorea cayenensis-rotunda) flour. Food Chemistry, vol. 82, p. 257-264.

Alves, R. M., Grossmann, M. V., Ferrero, C., Zaritky, N. E., Martini, M. N., Sierakoski, M. R. 2002. Chemical and functional characterization of products obtained from yam tubers. Starch/Starke, vol. 54, no. 10, p. 476-481.<476::AID-STAR476>3.0.CO;2-6

Aprianita, A., Vasiljevic, T., Bannikova, A., Kasapis, S. 2014a. Physicochemical properties of wheat-canna and wheat-konjac composite flours. Journal of Food Science and Technology, vol. 51, no. 9, p. 1784-1794. PMid:25190833

Aprianita, A., Vasiljevic, T., Bannikova, A., Kasapis, S. 2014b. Physicochemical properties of flours and starches derived from traditional Indonesia tubers and roots. Journal of Food Science and Technology, vol. 51, no. 12, p. 3669-3679. PMid:25477633

Awoyale, W., Maziya-Dixon, B., Sanni, L. O., Shittu, T. A. 2010. Nutritional and sensory properties of amala supplemented with distiller's spent grain (DSG). Journal of Food, Agriculture and Environment, vol. 8, p. 66-70.

Brunnschweiler, J., Luethi, D., Handschin, S., Farah, Z., Escher, F., Conde-Petit, B. 2005. Isolation, physicochemical characterization and application of yam (Dioscorea spp.) starch a thickening and gelling agent. Starch/Strarke, vol. 57, p. 107-117.

Chen, H. I., Sheu, W. H. H., Tai, T. S., Liaw, Y. P. 2003. Konjac supplements alleviated hypercholesterolemia and hyperglycemia in type 2 diabetic subjects - a randomized double-blind trial. Journal of the American College of Nutrition, vol. 22, no. 1, p. 36-42. PMid:12569112

Chung, S. Y., Han, S. H., Lee, S. W., Rhee, C. 2010. Physicochemical and bread-making properties of air flow pulverized wheat and corn flours. Food Science and Biotechnology, vol. 19, no. 6, p. 1529-1535.

Coursey, D. G., Ferber, C. E. M. 1979. The processing of Yams. In Pluckett, D. L. Small-scale processing and storage of tropical root crops. Boulder, Colorado, USA : Westview Press, p. 189-212. ISBN: 0891584174.

FAO. 2001. FAO Production Yearbook 1999, Rome, Italy : FAO. 321 p. ISBN-13: 9789250045207.

Garcia, M., Dale, N. 1999. Cassava root meal for poultry. Journal of Applied Poultry Science, vol. 8, no. 1, p. 132-137.

Girardin, O., Nindjin, C., Farah, Z., Eshcher, F., Stamp, P., Otokore, D. 1998. Effect of storage system and sprout removal on post-harvest yam (Dioscorea spp.) fresh weight losses. Journal of Agriculture Science, vol. 130, no. 3, p. 329-336.

Harijono, E. T., Saputri, D. S., Kusnadi, J. 2013. Effect of blanching on properties of water yam (Dioscorea alata) flour. Advance Journal of Food Science and Technology, vol. 5, no. 10, p. 1342-1350.

Van Hung, P., Morita, N. 2005. Physicochemical properties and enzymatic digestibility of starch from edible canna (Canna edulis) grown in Vietnam. Carbohydrate Polymers, vol. 61, no. 3, p. 314-321.

Jayakody, L., Hoover, R., Liu, Q., Donner, E. 2007. Studies on tuber starches. II. Molecular structure, composition and physicochemical properties of yam (Dioscorea sp.) starches grown in Sri Lanka. Carbohydrate Polymers, vol. 69, no. 1, p.148-163.

Kumoro, A. C., Retnowati, D. S., Budiyati, C. S., Manurung, T. and Siswanto. 2012. Water solubility, swelling and gelatinization properties of raw and ginger oil modified gadung (Dioscorea hispida Dennst) flour. Research Journal of Applied Sciences, Engineering and Technology, vol. 4, no. 17, p. 2854-2860.

Liu, Q., Donner, E., Yin, Y., Huang, R. L., Fan, M. Z. 2006. The physicochemical properties and in vitro digestibility of selected cereals, tubers, and legumes grown in China. Food Chemistry, vol. 99, no. 3, p. 470-477.

Moorthy, N. S. 2002. Physicochemical and functional properties of tropical tuber starches: A review. Starch - Stärke, vol. 54, no. 12, p. 559-592.<559::AID-STAR2222559>3.0.CO;2-F

Nara, S., Komiya, T. 1983. Studies on the relationship between water saturated state and crystallinity by the diffraction method for moistened potato starch. Starch, vol. 35, no. 12, p. 111-114.

Owuamanam, C. I., Iwuoha, C. I., Onuegbu, N. G., Ogueke, C. C., Nwosu, J. N. 2013.Quality characteristics of processed flours from trifoliate yam (Dioscorea dumetorum) as influenced by steeping and boiling in varying concentration of Trona solution over time. American Journal of Food Technology, vol. 8, no. 3, p. 162-172.

Polycarp, D., Afoakwa, E. O., Budu, A. S., Otoo, E. 2012. Characterization of chemical composition and anti-nutritional factors in seven species within the Ghanaian yam (Dioscorea) germplasm. International Food Research Journal, vol. 19, no. 3, p. 985-992.

Pomeranz, Y. 1991. Functional Properties of Food Components. 2nd ed. NEW YORK, USA : Academic Press. 560 p. ISBN-13: 978-0125612814.

Schoch, T. J., Maywald, E. C. 1968. Preparation and properties of various legume starches. Ceral Chemistry, vol. 45, p. 564-573.

Senanayake, S. A., Ranaweera, K. K. D. S., Bamunuarchchi, A. Gunaratne, A. 2012. Proximate analysis and phytochemical and mineral constituents in four cultivars of yams and tuber crops in Sri Lanka. Tropical Agricultural Research & Extension, vol. 15, no. 1, p. 32-36.

Singh, N., Singh, J., Kaur, L., Sodhi, N. S., Gill, B. S., 2003. Morphological, thermal and rheological properties of starches from different botanical sources. Food Chemistry, vol. 81, no. 2, p. 219-231.

Snow, P., O'Dea, K. 1981. Factor affecting the rate of hydrolysis of starch in food. American Journal of Clinical Nutrition, vol. 34, no. 12, p. 2721-2727. PMid:6172034

Srichuwong, S., Sunarti, T. C., Mishima, T., Isono, N., Hisamatsu, M., 2005. Starches from different botanical sources II: Contribution of starch structure to swelling and pasting properties. Carbohydrate Polymers, vol. 62, no. 1, p. 25-34.

Szylit, O., Durand, M., Borgida, L. P., Atinkpahoun, H., Prieto, F., Delort-Laval, J. 1978. Raw and steam- pelleted cassava, sweet potato and yam cayenensis as starch sources for ruminant and chicken diets. Animal Feed Science Technology, vol 3, no. 1, p.73-87.

Tattiyakul, J., Naksriarporn, T., Pradipasena, P., Miyawaki, O. 2006. Effect of moisture on hydrothermal modification of yam Dioscorea hispida Dennst starch. Starch/Stärke, vol. 58, no. 3-4, p. 170-176.

Tortoe, C., Dowuona, S., Akonor, P. T., Dziedzoave, N. T. 2017. Examining the physicochemical, functional and rheological properties in flours of farmers' 7 key yam (Dioscorea spp.) varieties in Ghana to enhance yam production. Cogent Food & Agriculture, vol. 3, no. 1, p. 1371564.

Ukpabi, U. J. 2010. Farmstead bread making potential of lesser yam (Dioscorea esculenta) flour in Nigeria. Australian Journal of Crop Science, vol. 4, no. 2, p. 8-73.

Yang, D. J., Lin, J. T. 2008. Effects of different storage conditions on steroidal saponins in yam (Dioscorea pseudojaponica Yamamoto) tubers. Food Chemistry, vol. 110, p. 670-677.




How to Cite

Retnowati, D. S., Kumoro, A. C., & Ratnawati, R. . (2018). Physical, thermal and functional properties of flour derived from Ubi Gembili (Dioscorea esculenta L.) tubers grown in Indonesia. Potravinarstvo Slovak Journal of Food Sciences, 12(1), 539–545.