Effects of Damaged Starch on Physicochemical Properties of Wheat Flour and its Bread Making Potential

Year 2012, Volume: 10 Issue: 2, 14 - 18, 01.06.2012

Sule Keskin Hazim Ozkaya Secil Turksoy

Abstract

The study was aimed to determine the effects of damaged starch on physicochemical properties of wheat flour and bread making potential. Hard HRW and soft wheat SWW varieties were either milled after tempering or milled without tempering. Wheat samples were remilled three RM3 and five RM5 times with decreasing roll gaps in order to increase the level of damaged starch and physical, chemical and physicochemical properties of flour and quality attributes of bread samples were investigated. The damaged starch content of HRW and non-tempered flour was higher in comparison with other samples. The falling number decreased as the content of damaged starch increased. Farinogram characteristics were negatively affected by increasing damaged starch content. Increasing levels of damaged starch increased bread volume and specific volume but decreased crumb grain and Dallmann value. It was shown that bread made from tempered flour had better than that from non-tempered wheat. The penetrometer value was significantly affected by milling treatments in the tempered samples of SWW and non-tempered samples of HRW

Keywords

Bread properties, Damaged starch, Penetrometer value, Rheological properties

Zedelenmiş Nişastanın Buğday Ununun Fizikokimyasal Özelliklerine ve Ekmek Yapma Potansiyeline Etkisi

Abstract

Bu çalışmanın amacı zedelenmiş nişasta miktarının buğday ununun fizikokimyasal özelliklerine ve ekmek yapma potansiyeline etkisini araştırmaktır. Bu amaçla sert HRW ve yumuşak SWW buğday çeşitleri tavlandıktan sonra ve tavlanmadan öğütülmüştür. Zedelenmiş nişasta miktarını artırmak için değirmenin vals aralıkları daraltılmış, örnekler bu valslerden 3 kez RM3 ve 5 kez RM5 geçirilmiştir. Elde edilen unların zedelenmiş nişasta miktarları, bazı kimyasal ve fizikokimyasal özellikleri ile ekmek özellikleri araştırılmıştır. HRW çeşidinin ve tavlanmadan öğütülen unların zedelenmiş nişasta miktarları diğer örneklere göre daha yüksek çıkmıştır. Düşme sayısı zedelenmiş nişasta miktarı arttıkça düşmüştür. Farinogram özellikleri artan zedelenmiş nişasta miktarından olumsuz yönde etkilenmiştir. Zedelenmiş nişasta miktarının artışıyla ekmek hacmi ve spesifik hacim değerleri artarken, ekmek içi yapısı ve Dallmann değerleri düşmüştür. Tavlanmış öneklerden yapılan ekmeklerin tavlanmamış örneklerden yapılanlara göre daha iyi olduğu görülmüştür. Penetrometre değeri üzerine öğütme uygulamasının etkisi SWW çeşidinin tavlanmış örneklerinde, HRW çeşidinin ise tavlanmamış örneklerinde önemli düzeyde bulunmuştur

Keywords

Ekmek özellikleri, Zedelenmiş nişasta, Penetrometre değeri, Reolojik özellikler

References

• Evers, A.D., Stevens, D.J., 1985. Starch damaged. In: Advances in Cereal Science and Technology, Edited by. Y Pomeranz, AACC, St. Paul, MN, USA, pp 321-347.
• Leman, P., Bijttebier, A., Goesaert, H., Vandeputte, G.E., Delcour, J.A., 2006. Influence of amylases on the rheological and molecular properties of partially damaged wheat starch. J. of the Sci of Food and Agric. 86: 1662-1669.
• Leon, A.E., Barrera, G.N., Perez, G.T., Ribotta, P.D., Rosell, C.M, 2006. Effect of damaged starch levels on flour-thermal behaviour of bread stailing. Eur. Food Res. Technol. 224: 187-192.
• Barrera, G.N., Perez, G.T., Ribotta, P.D., Leon, A.E., 2007. Influence of damaged starch on cookie and bread-making quality. Eur. Food Res. Technol. 225: 1-7.
• Ghodke, S.K., Ananthanarayan, L., Rodrigues, L., 2009. Use of response surface methodology to investigate the effects of milling conditions on damaged starch, dough stickiness and chapatti quality. Food Chem. 112: 1010–1015.
• Farrand, E.A., 1972. The influence of particle size and starch damage on the characteristics of bread flours. The Baker’s Dig. 46: 22-26.
• Mao, Y., Flores, R., 2001. Mechanical starch damage effects on wheat flour tortilla texture. Cereal Chem. 78: 286-293.
• Özkaya, B., Özkaya, H., 1994. Öğütme sırasındaki nişasta zedelenmesi ve ekmekçilikteki önemi. 1. Türkiye Değirmencilik Sanayi ve Teknolojisi Sempozyumu, 10-11 Mayıs, 1994, Konya 118- 121s.
• Rogers, D.E., Gelroth, J.A., Langemeier, J.M., Ranhotra, G.S., 1994. Evaluation of starch damage value amperometrically. Cereal Chem. 71: 578-581.
• D’Appolonia, B.L., Gilles, K.A., Osman, E.M., enzymatically or Pomeranz, Y., 1971. Carbohydrates. In: Wheat Chemistry and Technology, Edited by Y. Pomeranz, AACC,St. Paul, MN, USA, pp 301-392.
• Pomeranz, Y., Shellenberger, J.A., 1971. Bread Science and Technology. The Avi Publishing Co. Inc. Wesport Connecticut.
• Pyler, E.J., 1973. Bakery Science and Technology. Vol. I. Published by Siebel Publishing Co. Chicago IL. USA.
• Ranhotra, G.S., Gelroth, J.A., and Eisenbraun, G.J., 1993. Correlation between Chopin and AACC methods of determining damaged starch. Cereal Chem. 70: 236-237.
• Anonymous, 1971. Standard Methoden Fur Getreide Mehl Und Brot, Im. Verlag Moritz, Scheafer, Detmold.
• ICC, 2002. Standard Methods of International Association of Cereal Science and Technology, (Method No: 104; 106; 107; 110; 115; 116), Vienna
• Greenaway, W.T., Watson, C.A., 1975. The glutomatic for semiautomatic determination of wet and dry gluten content of wheat flour. Cereal Chem. 52: 367-373.
• AACC, 2000. Approved methods of the American Association of Cereal Chemist, (Method No: 46-10; 76-30A), 10th ed. The Association: St Paul, MN.
• Maghirang, E.B., Dowell, F.E., 2003. Hardness measurement of bulk wheat by single-kernel visible and near-infrared reflectance spectroscopy. Cereal Chem. 80: 316-322.
• Williams, P.C., 1969. Nature of mechanically damaged starch. Its production in flour. Northwestern Miller 276: 8-12.
• Kweon, M., Martin, R., Souza, E., 2009. Effect of tempering conditions on milling performance and flour functionality. Cereal Chem. 86: 12-17.
• Rao, P.H., Leelavahi, K., Shurpalekar, R., 1989. Effect of damaged starch on the chapatti-making qualityof whole wheat flour. Cereal Chem. 66:329- 333.