研究了磨浆工艺、煮浆处理和浓缩处理的速食豆腐粉浆料品质的影响。研究发现,在相同蛋白质含量下,无氧磨浆工艺的浆料比普通磨浆工艺的色泽更亮黄,主要风味成分含量明显减少,整体感官接受度较高。随着加热时间和浓缩程度的增加,豆腐粉浆料色泽变暗黄,粒径变大;无氧磨浆工艺的浆料的粒径变化幅度比普通磨浆工艺的小,这减缓了其粘度的增加,有利于减少能耗;无氧磨浆工艺浆料的风味物质含量很低,但是普通磨浆工艺的浆料中风味物质己醛的含量仍较高,这可能使其风味不佳。
In this study, the quality of instant tofu powder made by grinding, heating and concentration was investigated. The results showed that: under the same protein content condition, tofu powder made by oxygen-free grinding technology was brighter than that produced by traditional grinding technology, the content of unhappy soybean flavor was less, and the sensory acceptance was higher. With the increase of heating time and solids concentration, the color of tofu powder become darker and the particle size become larger. The particle size distribution by oxygen-free grinding technology was smaller than that of traditional grinding, which reduced the increase of viscosity of tofu powder and reduced energy consumption. The flavor components produced by oxygen-free grinding technology was very small, but hexanal content by traditional grinding was higher which may cause the poor flavor of the instant tofu powder.
[1] FRANCA S A D, MARTINS M T S. Levels of isoflavones and proteins in standardized soya recipes[J]. Higiene Alimentar, 2009,1:47-53.
[2] LIEN C C, TING C H. Characterising the progress of gelation in tofu making with ohmic heating[J]. Journal of Agricultural Chemistry & Environment, 2015,4(2): 1-7.
[3] RACKIS J J, HONING D H, SESSA D J, et al. Flavor and flatulence factors in soybean protein products[J]. Journal of Agricultural & Food Chemistry, 1970,18(6): 977-982.
[4] LV Y C, SONG H L,LI X, et al. Influence of blanching and grinding process with hot water on beany and non-beany flavor in soymilk[J]. Journal of Food Science, 2011, 76(1): S20-S25.
[5] WOLF W J, Lipoxygenase and flavor of soybean protein products[J]. Journal of Agricultural & Food Chemistry, 1975, 23(2): 136-141.
[6] AXEROLD B, CHESBROUGH T M, LAAKSO S. Lipoxygenase from soybeans[J]. Plant Physiology, 1981, 71: 441-451.
[7] MELLOR N, BLIGH F, CHANDLER L, et al. Reduction of off-flavor generation in soybean homogenates: a mathematical model[J]. Journal of Food Science, 2010, 75(7): R131-R138.
[8] ZHANG Y, GUO S, LIU Z, et al. Off-flavor related volatiles in soymilk as affected by soybean variety, grinding, and heat-processing methods[J]. Journal of Agricultural & Food Chemistry, 2012, 60(30): 7 457-7 462.
[9] OBATA A, MATSUURA M, KITAMURA K. Degradation of sulfhydryl groups in soymilk by lipoxygenases during soybean grinding[J]. Bioscience Biotechnology & Biochemistry, 2008, 60(8): 1 229-1 232.
[10] GUO F, XIONG Y L, QIN F, et al. Surface properties of heat-induced soluble soy protein aggregates of different molecular masses[J]. Journal of Food Science, 2015, 80(2): C279-C287.
[11] JINAPONG N, SUPHANTHARIKA M, JAMNONG P. Production of instant soymilk powders by ultrafiltration, spray drying and fluidized bed agglomeration[J]. Journal of Food Engineering, 2008, 84(2): 194-205.
[12] WU W D, LIU W, GENGENBACH T, et al. Towards spray drying of high solids dairy liquid: Effects of feed solid content on particle structure and functionality[J]. Journal of Food Engineering, 2014, 123(2): 130-135.
[13] 孙灵湘.豆浆风味模拟体系的构建及各组分对其风味组成的影响[D]. 无锡:江南大学,2015.
[14] 贾聪,华欲飞,陈业明,等. pH和阿拉伯胶对大豆分离蛋白/大豆蛋白酶解产物乳化性质的影响[J]. 食品与发酵工业, 2017, 43(5): 25-29.
[15] 田其英,华欲飞.大豆脂肪氧化酶研究进展[J]. 粮食与油脂, 2006(8): 6-9.
[16] 吕玉翠.豆浆和大豆浓缩蛋白乳的热处理对其品质的影响[D]. 无锡:江南大学,2015.
[17] KOBAYASHI A, TSUDA Y, HIRATA N, et al., Aroma constituents of soybean [Glycine max (L.) Merril] milk lacking lipoxygenase isozymes[J]. Journal of Agricultural & Food Chemistry, 1995(9): 2 449-2 452.
[18] GUAN, CHUN Yun, XIAO Ling, et al. Effects of lipoxygenase null genes of soybean in controlling beany-flavor of soymilk and soyflour[J]. Journal of Integrative Agriculture, 2002, 1(9): 965-971.
[19] HUANG Y, HUA Y, QIU A. Soybean protein aggregation induced by lipoxygenase catalyzed linoleic acid oxidation[J]. Food Research International, 2006, 39(2):240-249.
