Czech J. Food Sci., 2002, 20(6):229-236 | DOI: 10.17221/3535-CJFS

Effect of defatted soybean flour on the flavour of extruded mixtures with wheat flour

J. Pokorný, A. Farouk Mansour, F. Pudil, V. Janda
Department of Food Chemistry and Analysis - Institute of Chemical Technology, Prague, Czech Republic

Mixtures of wheat semolina, 5% glucose and 0-30% defatted soybean flour were used for the preparation of extruded samples using a pilot plant single screw extruder, maximum temperature being 140°C. The browning reactions were only moderate, the intensities of the trichromatic a* coordinate increased, and some changes were observed in chroma and the odour difference ΔE*. The sensory acceptability improved by increasing the content of soybean flour, the odour intensity increased, and some changes were observed in the sensory profile. Volatile substances were isolated using a SPME procedure, and the volatiles were separated using a Fisons GLC 8000 apparatus equipped with a mass spectrometer. Among the flavour active volatiles, pyrazines were the most prominent class of compounds, especially methyl and ethyl substituted derivatives. Pyrrole and furan substituted pyrazines were found only in small amounts because of the low extrusion temperature. Other furan and pyrrole derivatives had a lesser effect on flavour because of their relatively low amounts. Aldehydes, fatty acids, ketones, and other aliphatic derivatives contributed only a little to the resulting flavour. Compared to the mixtures of semolina and glucose only, the additions of defatted soybean flour moderately increased the number of substituted pyrazines detected in the extruded mixtures but increased substantially the pyrazine fraction in the total peak area. Among furan derivatives, 2-furancarboxaldehyde, 2-furanmethanol and 5-methyl-2-furyl alcohol belonged to the most prominent derivatives. Among other compounds, acetic acid, butyrolactone and maltol should be mentioned.

Keywords: extrusion; flavour; pyrazines; soybean flour; wheat flour

Published: December 31, 2002  Show citation

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Pokorný J, Farouk Mansour A, Pudil F, Janda V. Effect of defatted soybean flour on the flavour of extruded mixtures with wheat flour. Czech J. Food Sci. 2002;20(6):229-236. doi: 10.17221/3535-CJFS.
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    References

    1. BALTES W., BOCHMANN G. (1987): Model reactions in roast aroma formation. II. Mass spectrometric identification of furans and furanones from reaction of serine and threonine with sucrose under conditions of coffee roasting - IV. Mass spectrometric identification of pyrazines from the reaction of serine and threonine with sucrose under conditions of coffee roasting. Z. Lebensm. Unters. For., 184: 179-186, 485-493. Go to original source...
    2. FADEL H.H.M., HEGAZY N.A. (1993): Improvement and stabilization of white bread flavour. Nahrung, 37: 386-394. Go to original source...
    3. FAROUK MANSOUR A., PUDIL F., JANDA V., POKORNÝ J. (2000): Effect of amino acids on the composition and properties of extruded mixtures of wheat flour and glucose. Nahrung, 44: 188-192. Go to original source... Go to PubMed...
    4. FAROUK MANSOUR A., PUDIL F., JANDA V., POKORNÝ J. (2001): Changes during the extrusion of semolina in mixture with sugars. Czech J. Food Sci., 19: 24-30. Go to original source...
    5. FORS S. M., OLOFSSON B.K. (1985): Alkylpyrazine volatiles formed in the Maillard reaction. I. Determination of odour detection threshold and odour intensity functions by dynamic olfactometry. Chem. Senses, 10: 287-296. Go to original source...
    6. HWANG H.I., HARTMAN T.G., ROSEN R.T., LECH J., HO C.-T. (1994): Formation of pyrazines from the Maillard reaction of glucose and lysine α- and ε-amine nitrogen. J. Agric. Food Chem., 42: 1000-1004. Go to original source...
    7. KADLEC P. (2000): Carbohydrate chemistry. In: HEDLEY C.L. (ed.): Carbohydrates in Grain Legume Seeds. CABI Publishing, Oxon: 15-60. Go to original source...
    8. KIM Y.H., KIM O.C., LEE J.I., YANG K.K. (1988): Formation of volatile compounds from Maillard reaction of D-glucose with DL-alanine in propylene glycol solution. Korean J. Food Sci. Technol., 20: 157-163.
    9. KOEHLER P.E., MASON M.E., ODELL G.V. (1971): Odour threshold levels of pyrazine compounds and assessment of their role in the flavour of roasted foods. J. Food Sci., 36: 816-818. Go to original source...
    10. LUNDGREN B., KARLSTRÖM B., TORRANG-LINDBOM G., ANDERSSON Y., CLAPPERTON J. (1991/92): Extruded wheat flour: flavour and texture - comparisons and evaluations by two laboratories. Food Qual. Preference, 3: 1-12. Go to original source...
    11. MAIER H.G., MORITZ K., SCHMIDT E. (1987): Thermostabile Bindung von Aromastoffen an Stärke durch Extrudieren. Lebensm. Gerichtliche Chemie, 41: 56-59.
    12. OSNABRUGGE W. (1989): How to flavor baked foods and snacks effectively. Food Technol., 43: 74-82.
    13. RIHA III W.E., HO C.-T. (1996): Formation of flavors during extrusion cooking. Food Rev. Int., 12: 351-373. Go to original source...
    14. ROTHE M. (1974): Aroma von Brot. Akademie Verlag, Berlin: 32-35.
    15. S CHIEBERLE P., G ROSCH W. (1984): Identifizierung von Aromastoffen aus der Krume von Roggenbrot - Vergleich mit den Aromen der Kruste. Z. Lebensm. Unters. For., 178: 479-483.
    16. SCHIEBERLE P., GROSCH W. (1987): Evaluation of flavours of wheat and rye bread crusts by aroma extract dilution analysis. Z. Lebensm. Unters.-For., 185: 111-113. Go to original source...
    17. SHIBAMOTO T. (1986): Odor threshold of some pyrazines. J. Food Sci., 51: 1098-1099. Go to original source...
    18. SIZER C.E., MAGA J.A., LORENZ K. (1975): The occurrence of pyrazines in white bread crust and crumb. Lebensm. Wissens. Technol., 8: 267-269.
    19. YAYLAYAN V.A., FICHTALL J., VAN DE VOORT F.R. (1992): Production of Maillard reaction flavour precursors by extrusion processing. Food Res. Int., 25: 175-180. Go to original source...
    20. YOO S.S., HO C.-T. (1997): Pyrazine generation from the Maillard reaction of mixed amino acids in model systems. Perfumer Flavorist, 22: 49-52.

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