Effects of wheat cultivar, cooking method, and bulgur type on the yield and colour properties of bulgur
Main Article Content
Keywords
bulgur quality, cultivar, cooking method, bulgur type, yield, colour
Abstract
Making bulgur is an ancient process and bulgur may, in fact, be man’s first processed food. Technological improvement is essential in order to achieve higher quality bulgur. The steam cooker is gaining popularity these days since it preserves the nutritional value of the food during the cooking. In the present study, coarse and fine bulgur types were produced from bread and durum wheat cultivars by using steam cooker and autoclave to determine the effects of cultivar, cooking method, and bulgur type on the yield and colour properties of bulgur. The less total bulgur yield was determined at durum wheat cultivars and autoclave cooking method because of the higher amount of bran removed. The percentage of the bulgur samples having a particle size ranging between 2.0 and 2.5 mm was the highest for both cooking methods. Durum wheat cultivars possessed harder and more breakable grain structure during the bulgur production, which caused 11.9% less coarse and 11.4% more fine bulgur yields. The kernels cooked in steam cooker also tended to break more during the debranning process which raised about 20% more fine bulgur yield. Bulgur produced from durum wheat cultivars possessed higher lightness (L) and yellowness (b), and lower redness (a) colour values. During the bulgur production, a decrease (11.6%) in ‘L’ colour value and an increase (164.6%) in ‘a’ colour value was determined from raw material to bulgur. The application of high temperature and pressure used for autoclave cooking caused darkening of bulgur colour. The coarse bulgur type had higher ‘L’ colour value and lower ‘a’ colour value. The steam cooker has been utilised for the first time in bulgur production as a cooking method, although it causes a higher amount of breakage of the kernels, the bulgur maintains the yellowish colour which is a desired trait.
References
American Association of Cereal Chemists (AACCI), 2000. Approved methods. AACC International, St Paul, MN, USA.
Abdel-Aal, E.M., Young, J.C., Wood, P.J. and Rabalski, I., 2002. Einkorn: a potential candidate for developing high lutein wheat. Cereal Chemistry 79: 455-457.
Acer, Z., 2004. Mikrodalga pişirme ve kurutmanın bulgur kalitesine etkisi. MSc-thesis, Ondokuz Mayıs University, Samsun, Turkey.
Anıl, M., 1994. Bulgur yapımında farklı buğday çeşitleri, pişirme yöntemleri ve kurutma sıcaklıklarının ürün kalitesi üzerine etkisi. MSc-thesis, Ondokuz Mayıs University, Samsun, Turkey.
Aydın, F., Koçak, A.N. and Dağ, A., 1993. Bazı buğday çeşitlerinin bulgur kalitesini belirlenmesi üzerine bir araştırma. In: Ottekin, A., Zencirci, N., Demir, Z., Eser, V., Aktan, B. and Atli, A. (eds.) Makarnalık Buğday ve Mamülleri Simpozyumu. 30 November-3 December, 1993. Ankara, Turkey, pp. 310-317.
Balci, F. and Bayram, M., 2015. Improving the color of bulgur: new industrial applications of tempering and UV/sun-light treatments. Journal of Food Science and Technology 52: 5579-5589.
Bayram, M., 2007. Application of bulgur technology to food aid programs. Cereal Foods World 52: 249-256.
Bayram, M., 2005. Modelling of cooking of wheat to produce bulgur. Journal of Food Engineering 71: 179-186.
Bayram, M. and Öner, M.D., 2005. Stone, disc and hammer milling of bulgur. Journal of Cereal Science 41: 291-296.
Bilgiçli, N., 2009. Effects of cooking and drying processes on physical, chemical and sensory properties of legume based bulgur. Journal of Food Processing and Preservation 33: 590-604.
Certel, M., 1990. Makarnalık (Tr. durum) ve ekmeklik (Tr. aestivum) buğdaylarından farklı ısıl işlem uygulamalarıyla üretilen bulgur ve ürünlerinin fiziksel, kimyasal, duyusal kalite özellikleri. PhD-thesis, Atatürk University, Erzurum, Turkey.
Haley, W. and Pence, V., 1960. Bulgur, an ancient wheat food. Cereal Science Today 5: 203-207.
Hayta, M., 2001. Bulgur quality as affected by drying methods. Journal of Food Science 67: 2241-2244.
Hayta, M., Alpaslan, M. and Cakmakli, U., 2003. Physicochemical and sensory properties of soymilk-incorporated bulgur. Journal of Food Science 68: 2800-2803.
Hidalgo, A., Fongaro, L. and Brandolini, A., 2017. Colour screening of whole meal flours and discrimination of seven Triticum subspecies. Journal of Cereal Science 77: 9-16.
İnceer, N.E., 2011. Mısır bulgurunun bazı besinsel ve teknolojik özellikleri üzerine farklı olum devrelerinin ve bazı mısır varyetelerinin etkisi. MSc-thesis, Selçuk University, Konya, Turkey.
Kahyaoglu, L.N., Sahin, S. and Sumnu, G., 2010. Physical properties of parboiled wheat and bulgur produced using spouted bed and microwave assisted spouted bed drying. Journal of Food Engineering 98: 159-169.
Kahyaoglu, L.N., Sahin, S. and Sumnu, G., 2012. Spouted bed and microwave-assisted spouted bed drying of parboiled wheat. Food and Bioproducts Processing 90: 301-308.
Karwasra, B.L., Gill, B.S., Kaur, M. and Kaur, H., 2017. Indian wheat (Triticum aestivum L.) cultivars: physical characteristics, micronutrients and heavy metal content. Quality Assurance and Safety of Crops & Foods 9: 295-302.
Koca, A.F. and Anıl, M., 1996. Farklı buğday çeşitleri ve pişirme yöntemlerinin bulgur kalitesine etkisi. Gıda 21: 369-374.
Melik, M., 2014. Bazı yerel ve tescilli makarnalık buğday çeşitlerinin verim unsurları, bulgur kalitesi ve randımanının incelenmesi. MSc-thesis, Mustafa Kemal University, Hatay, Turkey
Özboy, Ö., 1998. Bulgur üretiminde verim ve kalite belirlemede kullanılabilecek testler ile üretimin nişasta ve protein özellikleri üzerine etkileri. PhD-thesis, Hacettepe University, Ankara, Turkey
Özboy, Ö. and Köksel, H., 1998. Bulgur üretiminin buğdayların bazı kimyasal özelliklerinde meydana getirdiği değişiklikler. Gıda 23: 449-457.
Özboy, Ö. and Köksel, H., 2002. An application of linear regression technique for predicting bulgur yield and quality of wheat cultivars. Nahrung/Food 46: 21-24.
SAS Institute, 1999. SAS/STAT software: release 8.0. SAS Inst. Cary, NC, USA.
Savas, K. and Basman, A., 2016. Infrared drying: a promising technique for bulgur production. Journal of Cereal Science 68: 31-37.
Savaş, K., 2010. Kızılötesi uygulamasının bulgur üretiminde kullanımı ve bulgur kalitesine etkisi. MSc-thesis, Hacettepe University, Ankara, Turkey.
Trade Statistics for International Business Development (TRADE MAP), 2017. The bulgur exportation amount of Turkey. Available at: https://tinyurl.com/y68kejfv
Turkish Food Codex, 2018. Communiqué on bulgur, Communiqué No: 2016/49. Available at: https://tinyurl.com/yyqw254b
Turkish Statistical Institute (TÜİK), 2016. The bulgur production amount of Turkey. Available at: https://tinyurl.com/y5mlckfz
Ünüvar, A.D., 2009. Soyma işlemi ve granülasyon dağılışının bulgurun kalitatif ve besinsel özelliklerine etkisi. MSc-thesis, Selçuk University, Konya, Turkey.
Williams, P., El-Haramein, F. and Adleh, B., 1984. Burghul and its preparation. Rachis 3: 28-30.
Yilmaz, V.A. and Koca, A.F., 2017. Effect of different production techniques on bioactive compounds and antioxidant capacity of einkorn (Triticum monococcum L.) and durum (Triticum turgidumsubsp. durum) bulgur: effect of production techniques on einkorn and durum bulgur. Journal of the Science of Food and Agriculture 97: 269-277.
Yıldırım, A., Bayram, M. and Öner, M.D., 2006. Bulgurun öğütülmesinde diskli ve valsli değirmen kullanımı üzerine araştırma. In: Belibağlı, K.B. and Dalgıç., A.C. (eds.) Hububat 2006. Hububat Ürünleri Teknolojisi Kongresi. September 7-8, 2006. Gaziantep, Turkey, pp. 345-354.
Yılmaz, V.A., 2012. Siyez (Triticum monococcum L.) ve makarnalık (Triticum durum) buğdayların bulgura işlenmesinde bulgur kalitesi biyoaktif bileşenler ve antioksidan aktivitesindeki değişmeler. MSc-thesis, Ondokuz Mayıs University, Samsun, Turkey.
Yousif, S.I., Bayram, M. and Kesen, S., 2018. Characterization of volatile compounds of bulgur (Antep type) produced from durum wheat. Journal of Food Quality, Article ID: 8564086.