Studies on Evaluation and Determination of Physical and Functional Properties of Millets. (Ragi and Pearl Millet)

DOI: 10.18805/ag.DR-1407    | Article Id: DR-1407 | Page : 203-212
Citation :- Studies on Evaluation and Determination of Physical and Functional Properties of Millets. (Ragi and Pearl Millet).Asian Journal of Dairy and Food Research.2019.(38):203-212
P.A. Pawase, A. Shingote and U.D. Chavan
Address :
Department of Food Science and Technology, College of Food Technology, SCFT, Maldad (MH).
Submitted Date : 16-10-2018
Accepted Date : 23-09-2019


The study determined the physical properties of finger millet (FM) (Eluesine coracana) grains and the functional properties of FM flour. Physical properties such as colour attributes, sample weight, bulk density, true density, porosity, surface area, sample volume, aspect ratio, sphericity, dimensional properties and moisture content of grain cultivars were determined. Water absorption capacity (WAC), bulk density (BD), dispersibility, viscosity and micro-structure of FM flours were also evaluated. Data collected were analyzed using SPSS statistical software version 23.0. Results showed that milky cream cultivar was significantly higher (p < 0.05) than other samples in sample weight, bulk density, true density, aspect ratio and sphericity. However, pearl millet, used as a control, was significantly different from FM flour on all dimensional properties. Moisture content of milky cream showed higher significant difference for both grains and flours as compared to brown and black grain/flours. Milky cream cultivar was significantly different in L , b , C , H values, WAC, BD and dispersibility for both FM grains and flours. Data showed that brown flour was significantly higher in viscosity than in milky and black flours. Microstructure results revealed that starch granules of raw FM flours had oval/spherical and smooth surface. The study is important for agricultural and food engineers, designers, scientists and processors in the design of equipment for FM grain processing. Results are likely to be useful in assessing the quality of grains used to fortify FM flour.


Colour measurements Dimensional properties Finger millet Functional properties Micro-structure


  1. AACC (2000). In D. E. Bruns (Ed.). Official methods of analysis (10th ed). St Paul, MN: American Association of Cereal Chemists.
  2. Abdullah, M. H. R. O., Ch'ng, P. E., & Yunus, N.  A. (2012).  Some physical properties of musk lime (Citrus Microcarpa). International Journal of Biological, Biomolecular, Agricultural, Food and Biotechnological Engineering, 6(12), 1122–1125.
  3. Adebowale, A. A., Adegoke, M. T., Sanni, S. A., Adegunwa, M. O., & Fetuga, G. O. (2012). Functional properties and biscuit making potentials of sorghum-wheat flour com-posite. Journal of Food Technology, 7(6), 372–379.
  4. Adebowale, A. A., Fetuga, G. O., Apata, C. B., & Sannai, L. O. (2012). Effect of variety and initial moisture content on physical properties of improved millet grains.  Nigerian Food Journal, 30(1), 5–10.
  5. Akpata, M. L., & Akubor, P. I. (1999). Chemical composition and selected functional properties of sweet orange (Citrus sinensis) seed flour. Plant Foods for Human Nutrition, 54, 353–362.
  6. Al-Mahasneh, M. A., & Rababah, T. M. (2007). Effect of moisture content on some phy- sical properties of green wheat. Journal of Food Engineering, 79, 1467–1473.
  7. Amadou, I., Mahamadou, E. G., & Le, G.-W.  (2013). Millets, Nutritional composition, some health benefits and processing - A Review. Food Science and Technology, 25(7), 501–508.
  8. Anyasi, T. A., Jideani, A. I. O., & Mchau, G. R. A. (2017). Effect of organic acid pre- treatment on microstructure, functional and thermal properties of unripe banana flour. Journal of Food Measurement and Characterization, 11, 99–110.
  9. Bachar, K., Imangour, E., Khaled, A. B., Abid, M., Haddad, M., Yahya, L. B.,... Ferchichi, A. (2013). Fibre content and mineral composition of the finger millet of the Oasis of Gabes of Tunisia. Journal of Agricultural Science, 5(2), 219–226.
  10. Balasubramanian, S., & Viswanathan, R. (2010). Influence of moisture content on phy- sical properties of minor millets. Journal of Food Science, 47(3), 279–284.
  11. Baryeh, E. A. (2002). Physical properties millets. Journal of Food Engineering, 51, 39–46.
  12. Bhattacharya, S., & Malleshi, N. G. (2012). Physical, chemical and nutritional char-acteristics of premature-processed and matured green legumes. Journal of Food Science and Technology, 49(4), 459–466.
  13. Bhol, S., & John Don Bosco, S. (2014). Influence of malted finger and red kidney bean flour on quality characteristics of developed bread. LWT - Food Science and Technology, 55, 294–300.
  14. Dharmaraj, U., Meera, M. S., Yella Reddy, S. Y., & Malleshi, N. G. (2015). Influence of hydrothermal processing on functional properties and grain morphology of finger millet. Journal of Food Science and Technology, 52(3), 1361–1371.
  15. Faleye, T., Atere, A. O., Oladipo, O. N., & Agaja, M. O. (2013). Determination of some physical and mechanical properties of some cowpea varieties. African Journal of Agricultural Research, 8(49), 6485–6487.
  16. Giami, S. Y. (1993). Effect of processing on the proximate composition and functional properties of cowpea (Vigna unquiculata) flour. Food Chemistry, 47, 153–158.
  17. Gorinstein, S., Pawlzik, E., Delgado-Licon, E., Yamamoto, K., Kobayashi, S., Taniguchi, H.,.. Trakhtengerg, S. (2004). Use of scanning electron microscopy to indicate the si- milarities and differences in pseudocereal and cereal proteins. International Journal of Food Science and Technology, 39, 183–189.
  18. Goswami, D., Manikantan, M. R., Gupta, R. K., & Vishwakarma, R. K. (2015). Moisture dependent selected postharvest engineering properties of ragi (Eleusine coracana) grown in Northern Hills of India. Journal of Postharvest Technology, 3(3), 082–088.
  19. Gull, A., Kmalesh, P., & Kumar, P. (2015). Optimisation and functionality of millet sup- plemented pasta. Food Science and Technology, 35(4), 626–632.
  20. Hamdani, A., Rather, S. A., Shah, A., Gani, A., Wani, S. M., Masoodi, F. A., & Gani, A. (2014). Physical properties of barley and oats cultivars grown in high altitude Himalayan regions of India. Journal of Food Measurement and Characterization, 8, 296–304.
  21. Jain, R. K., & Bal, S. (1997). Properties of pearl millet. Journal of Agricultural Engineering Research, 66, 85–91.
  22. Jideani, I. A. (2012). Digitaria exilis (acha/fonio), Digitaria iburua (iburu/fonio) and Eleusine coracana (tamba/finger millet) - Non-conventional cereal grains with potentials. Scientific Review and Essays, 7(45), 3834–3843.
  23. Jideani, I. A., & Jideani, V. A. (2011). Developments on the cereal grains Digitaria exilis (acha) and Digitaria iburua (iburu). Journal of Food Science and Technology, 48(3), 251–259.
  24. Jideani, I. A., Takeda, Y., & Hizukuri, S. (1996). Structures and physiochemical properties of acha (Digitaria exilis), iburu (D. iburua) and tamba (Eleusine coracana). Cereal Chemistry, 73(6), 77–685.
  25. Karababa, E., & Coᶊkuner, Y. (2013). Physical properties of carob bean (Ceratonia siliqua L.): An industrial gum yielding crop. Industrial Crops and Products, 42, 440–446.
  26. Kibar, B., & Kibar, H. (2017). Determination of the nutritional and seed properties of some wild edible plants consumed as vegetable in the Middle black sea region of Turkey. South African Journal of Botany, 108, 117–125.
  27. Krishnan, R., Dharmaraj, U., Sai Manohar, R., & Malleshi, N. G. (2011). Quality char- acteristics of biscuits prepared from finger millet seed coat based composite flour. Food Chemistry, 129, 499–506.
  28. Kumari, N., & Raghuvanshi, R. S. (2015). Physico-chemical and functional properties of buckwheat (Fagopyrum esculentum Moench). Journal of Eco-friendly Agriculture, 10(1), 77–81.
  29. Mandge, H. M., Sharma, S., & Dar, B. N. (2014). Instant multigrain porridge: effect of cooking treatment on physicochemical and functional properties. Journal of Food Science and Technology, 51(1), 97–103.
  30. Mariotti, M., Alamprese, C., Pagani, M. A., & Lucisano, M. (2006). Effect of puffing on ultrastructure and physical characteristics of cereal grains and flours. Journal of Cereal Science, 43, 47–56.
  31. Markowski, M., Zuk-Gołaszewska, K., & Kwiatkowski, D. (2013). Influence of variety on selected physical and mechanical properties of wheat. Industrial Crops and Products, 47, 113–117.
  32. Mpotokwane, S. M., Gaditlhatlhelwe, E., Sebaka, A., & Jideani, V. A. (2008). Physical properties of Bambara groundnuts from Botswana. Journal of Food Engineering, 89, 93–98.
  33. Muthamilarasan, M., Dhaka, A., Yadav, R., & Prasad, M. (2016). Exploration of millet models for developing nutrient rich graminaceous crops. Plant Science, 242, 89–97.
  34. Olapade, A. A., Babalola, Y. O., & Aworth, O. C. (2014). Quality attributes of fufu (fer- mented cassava) flour supplemented with bambara flour. International Food Research Journal, 21(5), 2025–2032.
  35. Pathare, P. B., Opara, U. L., & A-Said, F. A. (2013). Color measurement and analysis in fresh and processed foods: A Review. Food and Bioprocess Technology, 6, 36–60.
  36. Poutanen, K. (2012). Past and future of cereal grains as food for health. Trends in Food Science and Technology, 25, 58–62.
  37. Sakhare, S. D., Inamdar, A. A., Soumya, C., Indrani, D., & Venkateswara Rao, G. (2014). Effect of flour particle size on microstructural, rheological and physico-sensory characteristics of bread and south Indian parotta. Journal of Food Science and Technology, 51(12), 4108–4113.
  38. Saleh, S. M., Zhang, Q., Chen, J., & Shen, Q. (2013). Millet grains, Nutritional quality, processing and potential health benefits. Comprehensive Reviews in Food Science and Technology, 12, 281–295.
  39. Sangamithra, A., Swamy, G. J., Sorna, P. R., Nandini, K., Kannan, K., Sasikala, S., & Suganya, P. (2016). Moisture dependent physical properties of maize kernels. International Food Research Journal, 23(1), 109–115.
  40. Sawant, A. A., Thakor, N. J., Swami, S. B., & Divate, A. D. (2013). Physical and sensory characteristics of ready-to-eat food prepared from finger millet based composite mixer by extrusion. Agricultural Engineering International Journal, 15(1), 100–105.
  41. Shiihii, S. U., Musa, H., Bhati, P. G., & Martins, E. (2011). Evaluation of physicochemical properties of Eleusine coracana starch. Nigerian Journal of Pharmaceutical Sciences, 10(1), 91–102.
  42. Siroha, A. K., Sandahu, K. S., & Kaur, M. (2016). Physicochemical, functional and anti- oxidant properties of flour from pearl millet varieties grown in India. Journal of Food Measurement and Characterization, 10, 311–318.
  43. Siwela, M., Taylor, J. N. R., de Milliano, W. A. J., & Doudu, K. G. (2010). Influence of phenolics in finger millet on grains and malt fungal load, and malt quality. Food Chemistry, 121, 443–449.
  44. Siwela, M., Taylor, J. R. N., de Milliano, W. A. J., & Doudu, K. G. (2007). Occurrence and location of tannins in finger millet grain and antioxidant activity of different grain type. Cereal Chemistry, 84(2), 169–174.
  45. Sun, Q., Gong, M., Li, Y., & Xiong, L. (2014). Effect of dry heat treatment on the physi- cochemical properties and structure of proso millet flour and starch. Carbohydrate Polymers, 110, 128–134.
  46. Takhellambam, R. D., Chimmand, B. V., & Prkasam, J. N. (2016). Ready-to-cook millet flakes based on minor millets for modern consumer. Journal of Food Science and Technology, 53(2), 1312–1318.
  47. Thilagavathi, T., Kanchana, S., Banumathi, P., Hemalatha, G., Vanniarajani, C., Sundar, M., & Ilamaran, M. (2015). Physico-chemical and functional characteristics of se- lected millets and pulses. Indian Journal of Science and Technology, 8(S7), 147–155.
  48. Upadhyaya, H. D., Ramesh, S., Sharma, S., Singh, S. K., Varshney,  S. K., Sarma, N. D. R. K., ... Singh, S. (2011). Genetic diversity for grains nutrients contents in a core col- lection of finger millet, Eleusine coracana L. germpalsm. Field Crops Research, 121, 42–52.
  49. Usman, M. A., Bolade, M. K., & James, S. (2016). Functional properties of weaning food blends from selected sorghum [Sorghum bicolor (L.) Moench] varieties and soybean (Glycine max). African Journal of Food Science, 10(8), 112–121.
  50. Vadivoo, A. S., Joseph, R., & Ganesan, N. M. (1998). Genetic variability and diversity for protein and calcium contents in finger millet [Eleusine coracana (L.) Gaertn] in re- lation to grains color. Plant Foods for Human Nutrition, 52, 353–364.
  51. Vanrnamkhasti, M. G., Mobli, H., Jafari, A., Keyhani, A. R., Soltanabadi, M. H., Rafiee, S., & Kheiralopour, K. (2008). Some physical properties of rough rice (Oryza sativa L.) grain. Journal of Cereal Science, 47, 496–501.
  52. Verma, V., & Patel, S. (2013). Value added products from nutri-cereals, Finger millet (Eleusine coracana). Emirates Journal of Food Agriculture, 25(3), 169–176.
  53. Wrolstad, R. E., & Smith, D. E. (2010). Colour analysis. In S. S. Nielsen (Ed.). Food analysis (pp. 573–586). New York: Springer Science+Business Media. https://doi.org/10. 1007/978-1-4419-1478-1.
  54. Zewdu, A. D., & Solomon, W. K. (2007). Moisture-dependent physical properties of teff seed. Biosystems Engineering, 96(1), 57–63.

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