Abstract
A method involving hydration, tempering and heating steps is presented to process rough rice as alternative to traditional parboiling with pressure steam. The effects of temperature (66–84 °C), tempering time (60–420 min) and heating time (30–180 min) on gelatinization degree and milling yield were analyzed by response surface method (RSM). A maximum value of gelatinization degree (37.0 %) and milling yield of 67.7 % were reached with a process temperature of 84 °C using tempering and heating times of 178 and 104 min respectively. A slight reduction of crystallinity (14 %) and a significant improvement of nutritional value with increments of 150 and 60 % in riboflavin and calcium contents were obtained in comparison with control (untreated rice). Hardness and adhesiveness of processed rice were intermediate between those of control and completely gelatinized rice. The proposed method, with lower temperature requirements than traditional parboiling, is presented to obtain an alternative product, expanding consumer choices.
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References
AOAC (2000) Official methods of analysis, 17th edn. Association of Official Analytical Chemists, Washington
Arai K, Rao SN, Desikachar HS (1975) Studies of the effect of parboiling on Japonica and Indica rice. Jpn J Trop Agric 19:7–14
ASTM (2000) Standard test methods for calcium and magnesium in water. American society for testing and materials, West Conshohocken
Bello M, Baeza R, Tolaba M (2006) Quality characteristics of milled and cooked rice affected by hydrotermal treatment. J Food Eng 72:124–133
Bello M, Tolaba M, Suarez C (2007) Water absorption and starch gelatinization in whole rice grain during soaking. LWT 40:313–318
Box G, Hunter J (1957) Multi-factor experimental designs for exploring response surfaces. Ann Math Stat 28:195–241
Fellers DA, Deissinger AE (1983) Preliminary study on the effect of steam treatment of paddy on milling properties and rice stickiness. J Cereal Sci 1:147–157
Fiske CH, Subarow Y (1925) The colorimetric determination of phosphorus. J Biol Chem 66:375–400
Goyal SK, Jogdand SV, Agrawal AK (2012) Energy use pattern in ricemilling industries-a critical appraisal. J Food Sci Technol. doi:10.1007/s13197-012-0747-3
Iyengar NG, Rajendran G, Yusuff KM, Ganesan G (1980) Pressure parboiling of paddy without the use of boiler. J Food Sci Technol 17:139–140
Kaddus Miah MA, Haque A, Douglass MP, Clarke B (2002a) a) Parboiling of rice. Part I: Effect of hot soaking time on quality of milled rice. Int J Food Sci Technol 37:527–537
Kaddus Miah MA, Haque A, Douglass MP, Clarke B (2002b) b) Parboiling of rice. Part II: Effect of hot soaking time on the degree of starch gelatinization. Int J Food Sci Technol 37:539–545
Khan AV, Amilhussin A, Arboleda JR, Manalo AS, Chancellor WJ (1974) Accelerated drying of rice using heat-conduction media. Trans ASAE 17:949–955
Khuri AI, Cornell JA (1987) Response surfaces. Designs and analyses. Marcel Dekker Inc, American Society for Quality Control, Quality Press
Lai HM (2001) Effects of hydrothermal treatment on the physicochemical properties of pregelatinized rice flour. Food Chem 72:455–463
Lund D (1987) Influence of time, temperature, moisture, ingredients and processing conditions on Starch gelatinization. Crit Rev Food Sci Nutr 20:249–252
Mahanta CL, Bhattacharya KR (2010) Relationship of starch changes to puffing expansion of parboiled rice. J Food Sci Technol 47(2):182–187
Manful JT, Grimm CC, Gayin J, Coker RD (2008) Effect of variable parboiling on cristallinity of rice samples. Cereal Chem 85(1):92–95
Marshall WE, Wadsworth JI, Verma LR, Velupillai L (1993) Determining the degree of gelatinization in parboiled rice: comparison of a subjective and an objective method. Cereal Chem 70(2):226–230
Morrison WR, Laignelet B (1983) An improved colorimetric procedure for determining apparent and total amylose in cereal and other starches. J Cereal Sci 1:19–35
Ong MH, Blanshard MV (1995) The significance of starch polymorphism in commercially produced parboiled rice. Starch 47:7–13
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(8):370–377
Pillaiyar P (1984) Applicability of the rapid gel test for indicating the texture of commercial parboiled rices. Cereal Chem 61:255–256
Pillaiyar P, Sabarathinam PL, Subramaniyan V, Sulochana S (1996) Parboiling of paddy using thermic fluid. J Food Eng 27:267–278
Sims A, Shoemaker D (1993) Simultaneous liquid chromatographic determination of thiamine and riboflavin in selected foods. J AOAC 76(5):1156–1160
Subba Rao PV, Bhattacharya KR (1966) Effect of parboiling on thimine content of rice. J Agric Food Chem 14(5):479–482
Unnikrishnan KR, Viraktamath CS, Krishnamurthy H, Bhattacharya KR (1982) Parboiling of paddy by simple soaking in hot water. J Food Technol 17:499–506
Wang JP, An HZ, Jin ZY, Xie ZJ, Zhuang HN (2011) Emulsifiers and thickeners on extrusion-cooked instant rice product. J Food Sci Technol. doi:10.1007/s13197-011-0400-6
Zobel HF (1992) Starch granules structure. In: Alexander RJ, Zobel H (ed) Developments in carbohydrate chemistry, AACC, St Paul MN, pp 1–36
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The authors acknowledge the financial support from UBACYT (Project UBACyT 20020110200357). MAL is fellowship of CONICET.
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Bello, M.O., Loubes, M.A., Aguerre, R.J. et al. Hydrothermal treatment of rough rice: effect of processing conditions on product attributes. J Food Sci Technol 52, 5156–5163 (2015). https://doi.org/10.1007/s13197-014-1534-0
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DOI: https://doi.org/10.1007/s13197-014-1534-0