Asian Journal of Dairy and Food Research, volume 38 issue 3 (september 2019) : 231-236

Shelf life estimation of preconditioned brown or unpolished rice (Oryza sativa) and its effect in microwave puffing

Ajay Kumar Swarnakar
1<div style="text-align:justify">Department of Agricultural and Food Engineering, Indian Institute of Technology, Kharagpur-721302, West Bengal, India</div>
Cite article:- Swarnakar Kumar Ajay (2019). Shelf life estimation of preconditioned brown or unpolished rice (Oryza sativa) and its effect in microwave puffing. Asian Journal of Dairy and Food Research. 38(3): 231-236. doi: 10.18805/ajdfr.DR-1475.
Microwave puffing of prepacked preconditioned brown rice can provides a hygienic, fresh and nutritious puffed rice as compared to conventional puffed rice. Pre-puffing conditioning (salt infusion) makes brown rice more hygroscopic therefore long storage of preconditioned brown rice reduces the puffing quality. This study was conducted to estimate the shelf life of prepacked conditioned brown rice in wrapped paper envelope with low density polythene for its microwave puffing. Preconditioning of brown rice was carried out at optimized conditions i.e., parboiling pressure (303 kPa) and time (14 min), preconditioning temperature (76.7 °C), salt content (3.5% (w/w), and pre-puffing moisture content (11.6 % (wb)). These packets were stored at 38±2 °C temperature and 90% relative humidity. Moisture sorption characteristics can be well described by Henderson model. Shelf life of preconditioned brown rice was estimated 36 days by its puffing quality characteristic and found that moisture content of preconditioned brown rice reaches 15.27% (wb).
  1. AOAC, (1990). Official methods of analysis. Association of Official Analytical Chemists Inc.Washington, DC. 15th edn.
  2. Boquet, R., Chirife, J., & Iglesias, H. A. (1978). Equations for fitting water sorption isotherms of foods. International Journal of Food Science & Technology, 13(4), 319-327.
  3. Brunauer, S., Deming, L. S., Deming, W. E., & Teller, E. (1940). On a theory of the van der Waals adsorption of gases. Journal of the American Chemical society, 62(7), 1723-1732.
  4. Chen, C., & Jayas, D. S. (1998). Evaluation of the GAB equation for the isotherms of agricultural products. Transactions of the ASAE-American Society of Agricultural Engineers, 41(6), 1755-1760.
  5. Dash, K. K., (2013). Fluidized bed preconditioning of rice and its microwave puffing. Unpublished Ph. D Thesis, IIT Kharagpur, WB, India.
  6. Ekasilp, W., Soponronnarit, S. & Therdyothin, A. (1995). Energy analysis in white rice and par-boiled rice mills for cogeneration in Thailand. International Energy Journal, 17(2), 83-92.
  7. Hsu, C. L., Chen, W., Weng, Y. M., & Tseng, C. Y. (2003). Chemical composition, physical properties, and antioxidant activities of yam flours as affected by different drying methods. Food chemistry, 83(1), 85-92.
  8. Jaya, S., & Das, H. (2005). Accelerated storage, shelf life and color of mango powder. Journal of Food Processing and Preservation, 29(1), 45-62.
  9. Smita, J., (2008). Development of a rice conditioner for making puffed rice using domestic microwave oven. Unpublished M. Tech Thesis, Indian Institute of technology, Kharagpur, WB, India.
  10. Kunze, O. R. (1977). Moisture adsorption influences on rice. Journal of Food Process Engineering, 1(2), 167-181.
  11. Maisont, S., & Narkrugsa, W. (2010). Effects of salt, moisture content and microwave power on puffing qualities of puffed rice. Kasetsart Journal Natural Science, 44(2), 251-261.
  12. Mir, S. A., Bosco, S. J. D., Shah, M. A. & Mir, M. M. (2016). Effect of puffing on physical and antioxidant properties of brown rice. Food Chemistry, 191, 139-146.
  13. Mohapatra, M., & Das, S. K. (2011). Effect of process parameters and optimization on microwave puffing performance of rice. Research Journal of Chemistry and Environment, 15(2), 454-461.
  14. Reddy, B. S., & Chakraverty, A. (2004). Equilibrium Moisture Characteristics of Raw and Parboiled Paddy, Brown Rice, and Bran, Drying Technology, 22:4, 837-851.
  15. Roopa, B. S., Mazumder, P., & Bhattacharya, S. (2009). Fracture behavior and mechanism of puffed cereal during compression. Journal of Texture Studies, 40(2), 157-171.
  16. Roy, P., Ijiri, T., Okadome, H., Orikaa, T., Nakamura, T. & Shiina, T., (2008). Effect of processing conditions on overall energy and quality of rice (Oryza Sativa L.). Journal of Food Engineering, 89, 343-348.
  17. Samapundo, S., Devlieghere, F., De Meulenaer, B., Atukwase, A., Lamboni, Y., & Debevere, J. M. (2007). Sorption isotherms and isostatic heats of sorption of whole yellow dent corn. Journal of Food Engineering, 79(1), 168-175.
  18. Swarnakar, A. K., Devi, M. K., & Das, S. K. (2014). Popping characteristics of paddy using microwave energy and optimization of process parameters. International Journal of Food Studies, 3(1).
  19. Van den Berg, C. (1985). Development of BET-like models for sorption of water on foods, theory and relevance. In Properties of water in foods (pp. 119-131). Springer Netherlands.
  20. Devi, M. K., & Das, S. K. (2017). Kinetics of color changes of popped rice during microwave popping: Effect of salt and moisture content. Journal of Food Process Engineering, 40(6), e12560.
  21. Swarnakar, A. K., Srivastav, P. P., & Das, S. K. (2019). Optimization of preconditioning process of pressure parboiled brown rice (unpolished) for microwave puffing and its comparison with hot sand bed puffing. Journal of Food Process Engineering, 42(3), e13007.

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