امکان جایگزینی امواج مایکروویو به جای بخاردهی برای نیم‌پخت کردن شلتوک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 بخش مهندسی بیوسیستم دانشگاه شیراز شیراز ایران

2 بخش مهندسی بیوسیستم، دانشگاه شیراز، شیراز، ایران

3 بخش مهندسی بیوسیستم دانشگاه شیراز

چکیده

اثر امواج مایکروویو جایگزین بخاردهی در فرآیند نیم‌پخت‌کردن بر خصوصیات مکانیکی دو رقم شلتوک نیم‌پخت شده از جمله مقاومت به شکست و عملکرد برنج سالم مورد مطالعه قرار گرفت. شلتوک‌ها به مدت دو ساعت در سه دمای 50، 60 و 70 درجه سلسیوس خیسانده شد و به مدت 15, 30، 45، 60، 75 و 90 ثانیه در معرض امواج مایکروویو با توان 800 وات قرار گرفت. نمونه‌ها در دو سطح صفر و 15 دقیقه بخاردهی شد و در دمای 35 درجه سلسیوس خشک شد. با افزایش مدت زمان ماکروویو مقاومت به شکست دانه‌ها و عملکرد برنج سالم برای هر دو رقم افزایش یافت. این افزایش در تیمارهای با مدت زمان‌ مایکروویو بیشتر از 30 ثانیه نسبت به شاهد تغییر معنی‌داری داشت. بیشترین استحکام خمشی و عملکرد برنج سالم در تیمار 90 ثانیه مایکروویو و دمای خیساندن 70 درجه سلسیوس برای رقم فجر و لنجان به ترتیب 7/24 مگاپاسکال و 7/70 درصد، و 8/20 مگاپاسکال و 5/75 درصد بود. بین مقاومت به شکست دانه‌ها، و عملکرد برنج سالم نمونه‌های بخاردهی شده به مدت 15 دقیقه و تیمار مایکروویو بدون بخاردهی برای هر دو رقم تفاوت معنی‌دار مشاهده نشد. نتایج این مطالعه نشان داد امواج مایکروویو تأثیر قابل قبولی در فرآیند نیم‌پخت‌کردن داشته و می‌تواند جایگزین بخاردهی شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Microwave Radiations Replacement Instead of Steam to Paddy Parboiling

نویسندگان [English]

  • Seyed Mehdi Nassiri 1
  • Motahareh Abdirad 2
  • Dariush Zare 3
  • Mohammad Amin Nematollahi 1
  • Naser Safar Razavizadeh 1
1 Department of Biosystems Engineering, Shiraz University, Shiraz, Iran
2 Department of Biosystems Engineering, Shiraz University, Shiraz, Iran
3 Department of Biosystems Engineering, Shiraz University, Shiraz, Iran
چکیده [English]

The effect of using microwaves instead of steaming in parboiling step on mechnial properties of two paddy variety such as breakage strength and healthy rice yield were studied. Paddy samples were soaked in hot water at 50, 60 and 70°C for two hours and then exposed to microwave radiation for 15, 30, 45, 60, 75 and 90 seconds at the output power of 800 Watts. Sample were divided into two categories, one steamed at atmospheric pressure for 15 minutes and another was not. Finally, all the samples were dried at 35 °C. An increasing trend for breakage strength and healthy rice yield (for both paddy varieties) was observed when microwave exposure duration was increased. This increase was significantly different in treatments with microwave duration greater than 30 s as compared to control. The highest kernel bending strength and healthy rice yield in 90 s microwave treatment and soaking temperature of 70 ° C for Fajr and Lanjan varieties  were 24.7 MPa and 70.7%, and 20.8 MPa and 75.5%, respectively. There was no significant difference between breakage strength and healthy rice yield of steamed samples for 15 minutes and non-steamed microwave treatment for both varieties. According to these results, the impact of microwave on parboiling process was acceptable and can be replaced by steaming.

کلیدواژه‌ها [English]

  • Microwave
  • Mechanical properties
  • Parboiling
  • rice
Ayamdoo, A., Demuyakor, B., Dogbe, W., Owusu, R., & Ofosu, M. (2013). Effect of varying parboiling conditions on physical qualities of Jasmine 85 and Nerica 14 rice varieties. American Journal Food Technology, 8, 31-42.
Bayat, F. (2004). Loss of crops at different stages and strategies to deal with it. In: The first national conference on prevention of waste. Tehran. Iran. (In Farsi)
Bhattacharya, K. R. (2004). In E. T. Champagne (Ed.), Rice: Chemistry and technology (3rd Ed). (pp. 329–404). USA: The American Association of Cereal Chemists, Inc.
Bilbao-Sainz, C., Butler, M., Weaver, T., & Bent, J. (2007). Wheat starch gelatinization under microwave irradiation and conduction heating. Carbohydrate Polymers, 69, 224-232.
Buggenhout, J., Brijs, K., Cellus, I., & Delcour, J. A. (2013). The breakage susceptibility of raw and parboiled rice: A review. Journal of Food Engineering, 117, 304-315.
Courtois, F., Faessel, M., & Bonazzi, C. (2010). Assessing breakage and cracks of parboiled rice kernels by image analysis techniques. Food Control, 21(4), 567-572.
Delcour, J., & Hoseney, R. C. (2010). Principles of cereal science and technology authors provide insight into the current state of cereal processing. Cereal Foods World, 55(1), 21-22.
Derycke, V., Vandeputte, G. E., Vermeylen, R., De Man, W., Goderis, B., Koch, M. H. J., & Delcour, J. A. (2005). Starch gelatinization and amylose–lipid interactions during rice parboiling investigated by temperature resolved wide angle X-ray scattering and differential scanning calorimetry. Journal of Cereal Science, 42(3), 334-343.
Emami, S., Perera, A., Meda, V., & Tyler, R. T. (2012). Effect of microwave treatment on starch digestibility and physico-chemical properties of three barley types. Food and Bioprocess Technology, 5(6), 2266-2274.
Ghanbarian, D., Valaei, M., Ghasemi-Varnamkhasti, M., Aghagolzadeh, H. R. (2017). Study on the effect of parboiled rice by microwave on recovery coefficient and percentage of head rice yield. Iran Biosytems Engineering, 48(2), 299-304. (In Farsi)
Islam, M. R., Shimizu, N., & Kimura, T. (2001). Quality Evaluation of Parboiled Rice with Physical Properties. Food Science and Technology Research, 7(1), 57-63.
Islam, M. R., Roy, P., Shimizu, N., & Kimura, T. (2002). Effect of Processing Conditions on Physical Properties of Parboiled Rice. Food Science and Technology Research, 8(2), 106-112.
Islam, M. R., Shimizu, N., & Kimura, T. (2004). Energy requirement in parboiling and its relationship to some important quality indicators. Journal of Food Engineering, 63(4), 433-439.
Jagtap, P. S., Subramanian, R., & Singh, V. (2008). Influence of soaking on crushing strength of raw and parboiled rice. International Journal of Food Properties, 11(1), 127-136.
Juliano, B. O. (1985). Criteria and teats for rice grain qualities. In B.O. Juliano (Ed.), Rice: Chemistry and technology (2nd ed). (pp. 443-524). St. Paul, MN, USA: American association of cereal chemists.
Kaasova, J., Kadlec, P., Bubnik, Z., & Pour, V. (2001). Microwave treatment of rice. Czech Journal of Food Sciences, 19(2), 62-66.
Kamil, M. M. (2001). Physico-chemical characteristics of egyption jasmine rice as affected by under-pressure and microwave parboiling methods. Mansoura Journal of Agricultural Science, 26(12), 7853- 7868.
Kar, N., Jain, R., & Srivastav, P. (1999). Parboiling of dehusked rice. Journal of Food Engineering, 39(1), 17-22.
Kashaninejad, M., Maghsoudlou, Y., Rafiee, S., & Khomeiri, M. (2007). Study of hydration kinetics and density changes of rice (Tarom Mahali) during hydrothermal processing. Journal of Food Engineering, 79(4), 1383-1390.
Lamberts, L., Rombouts, I., Brijs, K., Gebruers, K., Delcour, J .A. (2008). Impact of parboiling conditions on maillard precursors and indicators in long-grain rice cultivars. Food Chemistry, 110(4), 916-922.
Le, Q. T., & Songsermpong, S. (2014). Head rice yield, pasting property and correlations of accelerated paddy rice aging properties by microwave heating conditions. International Food Research Journal, 21(2), 703-712.
Lu, R., & Siebenmorgen, T. (1995). Correlation of head rice yield to selected physical and mechanical properties of rice kernels. Transactions of the ASAE, 38(3), 889-894.
Mahfeli, M., Ghanbari, F., Nassiri, S. M. (2014). Steaming time and drying temperature effect on broking force of parboiling rice. In: 8th National Congress of Biosystem Engineering and Mechanization in Agriculture, Ferdowsi University of Mashhad. Mashhad, Iran. (In Farsi)
Malek, M. M. (2012). Undercooked rice. Internal Monthly Agricultural Organization of Golestan province, 128, 4.
Manful, J., Abbey, L., Coker, R. (2009). Effects of artisanal parboiling methods on milling yield and cooked rice textural characteristics. Journal of Food Quality, 32(6), 725-734.
Marshal, W., Wadsworth, J., Verma, L., & Velupillai, L. (1993). Determining the degree of gelatinization in parboiled rice: comparison of a subjective and an objective method. Cereal Chemistry, 70(2), 226-230.
Marzal, A., Osca, J. M., Castell, V., Martínez, J., Benedito, C., Balbastre, J. V., & Sánchez-Hernández, D. (2005). Effect of microwave energy on grain quality of four Spanish rice varieties. Spanish Journal of Agricultural Research, 3(3), 310-318.
Miah, M., Haque, A., Douglass, M. P., & Clarke, B. (2002). Parboiling of rice. Part II: Effect of hot soaking time on the degree of starch gelatinization. International Journal of Food Science and Technology, 37(5), 539-545.
Nasirahmadi, A., Abaspoor, M. H., Aghagolzade, H. (2011). Effect of steaming time and soaking temperature of parboiling head rice yield of rice.In: 5th Regional Conference of Agricultural Research. Kordestan. Iran. (In Farsi)
Nassiri, S. M., Behzadian, H. (2014). Brittle failure point of two Iranian rice cultivars. In: 12th International Conference on Energy and Mechanization in Agriculture, Nevshehir, Turkey.
Nassiri, S. M., Etesami, S. M. (2016). Estimation of head rice yield by measuring the bending strength of kernels after drying by different drying methods. AgEngInt. CIGR Journal, 18, 368-377.
Nassiri, S. M., Shirzadifar, A. Shojaie, J. (2014). Effect of parboiling on failure strength of rice kernel. In: 8th national Congress of Biosystem Engineering and Mechanization in Agriculture, Ferdowsi University of Mashhad. Mashhad, Iran. (In Farsi)
Palav, T., & Seetharaman, K. (2007). Impact of microwave heating on the physico-chemical properties of a starch–water model system. Carbohydrate Polymers, 67(4), 596-604.
Parnsakhorn, S., & Noomhorm, A. (2008). Changes in physicochemical properties of parboiled brown rice during heat treatment. Agricultural Engineering International: CIGR Journal.
Perez, J. H., Tanaka, F., & Uchino, T. (2012). Modeling of mass transfer and initiation of hygroscopically induced cracks in rice grains in a thermally controlled soaking condition: With dependency of diffusion coefficient to moisture content and temperature–A 3D finite element approach. Journal of Food Engineering, 111(3), 519-527.
Safarrazavizadeh, N. (2016). Evaluation of some physical and mechanical characteristics of two parboiled rough rice cultivars in multi-stage soaking. Published MS Thesis, Shiraz University, Shiraz. (In Farsi)
Sangdao, C., Songsermpong, S., & Krairiksh, M. (2008). Performance of a continuous fluidized bed microwave paddy drying system using applicators with perpendicular slots on a concentric cylindrical cavity. In International Symposium on Antennas and Propagation (pp. 27-30)
Sareepuang, K., Siriamornpun, S., Wiset, L., & Meeso, N. (2008). Effect of soaking temperature on physical, chemical and cooking properties of parboiled fragrant rice. World Journal of Agricultural Sciences, 4(4), 409-415.
Siebenmorgen, T., & Qin, G. (2005). Relating rice kernel breaking force distributions to milling quality. Transactions of the ASAE, 48(1), 223.
Soponronnarit, S., Nathakaranakule, A., Jirajindalert, A., & Taechapairoj, C. (2006). Parboiling brown rice using super heated steam fluidization technique. Journal of Food Engineering, 75(3), 423-432.
Sridhar, B., & Manohar, B. (2003). Hydration kinetics and energy analysis of parboiling Indica paddy. Biosystems Engineering, 85(2), 173-183.
Taghinezhad, E., Khoshtaghaza, M. H., Minaei, S., & Latifi, A. (2015). Effect of Soaking Temperature and Steaming Time on the Quality of Parboiled Iranian Paddy Rice. International Journal of Food Engineering, 11(4), 547-556.
Thompson, J. F., Knutson, J., & Jenkins, B. (1990). Analysis of variability in rice milling appraisals. Applied Engineering in Agriculture. 6 (2), 194-198
Vadivambal, R., and Jayas. D. S. (2007). Changes in quality of microwave – treated agricultural products-a review. Biosystems Engineering, 98, 1-16.
Yadav, B. K., & Jindal, V. K. (2007). Water uptake and solid loss during cooking of milled rice (Oryza sativa L.) in relation to its physicochemical properties. Journal of Food Engineering, 80(1), 46-54.
Zhang, Q., Yang, W., & Sun, Z. (2005). Mechanical properties of sound and fissured rice kernels and their implications for rice breakage. Journal of Food Engineering, 68(1), 65-72.
Zhongdong, L., Peng, L., and Kennedy, J. F. (2005). The technology of molecular manipulation and modification assisted by microwaves as applied to starch granules. Carbohydrate Polymers, 61, 374-378.
Zylema, B. J., Grider, J. A., Gordon, J., and Davis, E. A. (1985). Model wheat starch systems heated by microwave irradation and conductin with equalized heatingtimes. Cereal Chemistry, 62, 447-453.