Abstract
Komal chawal, meaning soft rice, produced by brown rice parboiling of a low amylose rice variety chokuwa, was studied for its physical, physico-chemical, morphological and structural characteristics. The product was produced by soaking the brown rice at 60 °C for 90 min, followed by steaming and air drying to 12.0% (wb). The two steaming conditions used were: (1) open-steaming at atmospheric pressure for 20 min and (2) pressure-steaming at 1 atm (gauge) for 10 min. The three different drying temperatures used were 40, 50 and 60 °C. When soaked in water at 60 °C for 20 min the product attained a hardness value of cooked rice. The extent of changes in the kernel and flour properties as compared to the raw form were affected by the severity of the steaming condition and drying air temperature. The pressure steamed samples exhibited virtually persistent growth in paste viscosity in the profiles obtained from the rapid viscosity analyzer. X-ray diffraction analysis of flours revealed a loss of A-type pattern and formation of feeble peaks of A + V-type mixed patterns in steam-treated samples. Scanning electron photomicrographs showed the loss of the polygonal shape by starch granules during processing. The values of rehydration ratio, equilibrium moisture content for rehydration, sediment volume, extent of color change as denoted by total color difference, and the percent head rice yield were higher in pressure steamed komal chawal samples.
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References
AOAC (2016) Official methods of analysis, 20th edn. Association of Official Analytical Chemists, Washington
Ayamdoo AJ, Demuyakor B, Dogbe W, Owusu R, Ofosu MA (2013) Effect of varying parboiling conditions on physical qualities of Jasmine 85 and Nerica 14 rice varieties. Am J Food Technol 8:31–42. https://doi.org/10.3923/ajft.2013.31.42
Ayamdoo JA, Demuyakor B, Saalia FK, Addy F (2014) Effect of varying parboiling conditions on the cooking and eating/sensory characteristics of Jasmine 85 and Nerica14 Rice varieties. Am J Food Technol 9:1-14. https://doi.org/10.3923/ajft.2014.1.14
Bualuang O, Tirawanichakul Y, Tirawanichakul S (2013) Comparative study between hot air and infrared drying of parboiled rice: kinetics and qualities aspects. J Food Process Preserv 37:1119–1132. https://doi.org/10.1111/j.1745-4549.2012.00813.x
Dutta H, Mahanta CL (2014) Laboratory process development and physicochemical characterization of a low amylose and hydrothermally treated ready-to-eat rice product requiring no cooking. Food Bioprocess Technol 7:212–223. https://doi.org/10.1007/s11947-012-1037-9
Elbert G, Tolaba MP, Suárez C (2001) Effects of drying conditions on head rice yield and browning index of parboiled rice. J Food Eng 47:37–41. https://doi.org/10.1016/s0260-8774(00)00097-2
Kam K, Arcot J, Ward R (2012) Fortification of rice with folic acid using parboiling technique: effect of parboiling conditions on nutrient uptake and physical characteristics of milled rice. J Cereal Sci 56:587–594. https://doi.org/10.1016/j.jcs.2012.08.010
Kar N, Jain RK, Srivastav PP (1999) Parboiling of dehusked rice. J Food Eng 39:17–22. https://doi.org/10.1016/s0260-8774(98)00138-1
Kaur P, Singh N, Pal P, Kaur A (2018) Variation in composition, protein and pasting characteristics of different pigmented and non pigmented rice (Oryza sativa L.) grown in Indian Himalayan region. J Food Sci Technol. https://doi.org/10.1007/s13197-018-3361-1
Klein B, Pinto VZ, Vanier NL, Zavareze ER, Colussi R, Evangelho JA, Gutkoski LC, Dias ARD (2013) Single and dual heat-moisture treatment: impact on the properties of starches from different botanical sources. Carbohydr Polym 98:1578–1584. https://doi.org/10.1016/j.carbpol.2013.07.036
Lamberts L, Brijs K, Mohamed R, Verhelst N, Delcour JA (2006) Impact of browning reactions and bran pigments on color of parboiled rice. J Agric Food Chem 54:9924–9929. https://doi.org/10.1021/jf062140j
Leelayuthsoontorn P, Thipayarat A (2006) Textural and morphological changes of Jasmine rice under various elevated cooking conditions. Food Chem 96:606–613. https://doi.org/10.1016/j.foodchem.2005.03.016
Luh BS (1991) Quick-cooking rice. In: Luh BS (ed) rice. Springer, Boston, pp 540–565. https://doi.org/10.1007/978-1-4899-3754-4_17
Manful JT, Grimm CC, Gayin J, Coker RD (2008) Effect of variable parboiling on crystallinity of rice samples. Cereal Chem 85:92–95. https://doi.org/10.1094/cchem-85-1-0092
Oli P, Ward R, Adhikari B, Torley P (2014) Parboiled rice: understanding from a materials science approach. J Food Eng 124:173–183. https://doi.org/10.1016/j.jfoodeng.2013.09.010
Oli P, Ward R, Adhikari B, Torley P (2016) Colour change in rice during hydration: effect of hull and bran layers. J Food Eng 173:49–58. https://doi.org/10.1016/j.jfoodeng.2015.10.036
Pal P, Singh N, Kaur P, Kaur A, Virdi AS, Parmar N (2016) Comparison of composition, protein, pasting, and phenolic compounds of brown rice and germinated brown rice from different cultivars. Cereal Chem 93:584–592. https://doi.org/10.1094/cchem-03-16-0066-r
Parnsakhorn S, Noomhorm A (2008) Changes in physicochemical properties of parboiled brown rice during heat treatment. Agric Eng Int CIGR J 10:1–20
Patindol J, Newton J, Wang YJ (2008) Functional properties as affected by laboratory-scale parboiling of rough rice and brown rice. J Food Sci 73:370–377. https://doi.org/10.1111/j.1750-3841.2008.00926.x
Pillaiyar P (1988) Parboiling. Rice—post production manual. Wiley Eastern Ltd. Publishers, New Delhi, pp 166–229
Prasert W, Suwannaporn P (2009) Optimization of instant jasmine rice process and its physicochemical properties. J Food Eng 95:54–61. https://doi.org/10.1016/j.jfoodeng.2009.04.008
Reddy BS, Chakraverty A (2004) Physical properties of raw and parboiled paddy. Biosyst Eng 88:461–466. https://doi.org/10.1016/j.biosystemseng.2004.05.002
Saeed F, Pasha I, Anjum FM, Suleria HAR, Farooq M (2001) Effect of parboiling on physico-chemical and cooking attributes of different rice cultivars. Internet J Food Saf 13:237–245
Sareepuang K, Siriamornpun S, Wiset L, Meeso N (2008) Effect of soaking temperature on physical, chemical and cooking properties of parboiled fragrant rice. WJAS 4:409–415
Shittu TA, Olaniyi MB, Oyekanmi AA, Okeleye KA (2009) Physical and water absorption characteristics of improved rice varieties. Food Bioprocess Technol 5:298–309. https://doi.org/10.1007/s11947-009-0288-6
Sindawal S, Bhattacharya S (2015) Instantization and agglomeration of foods. In: Bhattacharya S (ed) Conventional and advanced food processing technologies. Wiley, New York, pp 313–336. https://doi.org/10.1002/9781118406281.ch13
Singh N, Paul P, Virdi AS, Kaur P, Mahajan G (2014) Influence of early and delayed transplantation of paddy on physicochemical, pasting, cooking, textural, and protein characteristics of milled rice. Cereal Chem 91:389–397. https://doi.org/10.1094/cchem-09-13-0193-r
Sittipod S, Shi YC (2016) Changes of starch during parboiling of rice kernels. J Cereal Sci 69:238–244. https://doi.org/10.1016/j.jcs.2016.03.015
Swasdisevi T, Sriariyakula W, Tia W, Soponronnarit S (2010) Effect of pre-steaming on production of partially-parboiled rice using hot-air fluidization technique. J Food Eng 96:455–462. https://doi.org/10.1016/j.jfoodeng.2009.08.026
Thimmaiah SK, Thimmaiah SK (2004) Standard methods of biochemical analysis. Kalyani Publishers, Ludhiana
Unnikrishnan KR, Bhattacharya KR (1987) Properties of pressure-parboiled rice as affected by variety. Cereal Chem 64:321–323
Villota SMA, Tuates AM Jr, Capariño OA (2016) Cooking qualities and nutritional contents of parboiled milled rice. AJAS 04:1172–1178
Wang R, Chen C, Guo S (2017) Effects of drying methods on starch crystallinity of gelatinized foxtail millet (α-millet) and its eating quality. J Food Eng 207:81–89. https://doi.org/10.1016/j.jfoodeng.2017.03.018
Yu S, Ma Y, Liu T, Menager L, Sun DW (2010) Impact of cooling rates on the staling behavior of cooked rice during storage. J Food Eng 96:416–420. https://doi.org/10.1016/j.jfoodeng.2009.08.019
Zhou Z, Robards K, Helliwell S, Blanchard C (2002) Ageing of stored rice: changes in chemical and physical attributes. J Cereal Sci 35:65–78. https://doi.org/10.1006/jcrs.2001.0418
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Authors thank the University Grant Commission (UGC) for the National Fellowship Programme to conduct the doctoral investigation.
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Wahengbam, E.D., Hazarika, M.K. Quality of ready-to-eat komal chawal produced by brown rice parboiling method. J Food Sci Technol 56, 187–199 (2019). https://doi.org/10.1007/s13197-018-3472-8
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DOI: https://doi.org/10.1007/s13197-018-3472-8