Abstract: This paper studies the effect of freeze-thaw cycles treatment on the quality of pre-awakened frozen steamed bread with minced red bean. The rheological properties, water transport and thermodynamic properties of dough,and analyzes the water distribution, texture, color, specific volume, pH and water activity of steamed bread with minced red bean cooked by steaming dough were explored by low field nuclear magnetic resonance analyzer, differential thermal analyzer, texture analyzer and rheometer. The results showed that the total moisture, deep bound water and semi-bound water of frozen dough were continuously lost, and the rheological properties of dough such as elastic modulus G′ and viscous modulus G′ are the same, and the thermal properties of dough including start temperature (To), end temperature (Tp), peak temperature (Tc) and gelatinization enthalpy (ΔH) were significantly different. Moreover, after steaming, the water state distribution was unstable accompany with the cooking loss increases. In addition, the texture quality was affected and chromatic aberration quality and specific volume were significantly different. Besides, pH and water activity also became unstable. It could be seen that the bound water decreased linearly, the free water increased rapidly, and the water of both of them migrated after twice freezing and thawing treatment with the steamed bread with minced red bean. So it had an effect on cooking loss and water activity. And the rheological properties of frozen steamed bread dough with minced red bean were linearly related to the hardness. In a word, after three times treatment of freezing and thawing, the quality indexes of the pre-awakened frozen steamed bread dough with minced red bean decreased greatly, and the quality of samples steamed from dough also decreased. Therefore, the freeze-thaw cycles has a great negative impact on the samples, the experimental results can provide a theoretical basis for temperature control and scientific quality control of pre-waking noodle products in the actual production, transportation, storage and sales.
王秋玉,朱文政,薛盼盼,等. 冻融循环对预醒发冷冻豆沙包品质的影响[J]. 食品与发酵工业, 2021, 47(9): 215-222.
WANG Qiuyu,ZHU Wenzheng,XUE Panpan,et al. Effect of freeze-thaw cycles on the quality of pre-awakened frozen steamed bread with minced red bean[J]. Food and Fermentation Industries, 2021, 47(9): 215-222.
 武晓娟,薛文通,王小东,等.红豆沙加工工艺及功能特性研究进展[J].食品工业科技,2011,32(3):453-455. WU X J,XUE W T,WANG X D,et al.Research progress on processing and functional properties of red bean paste[J].Science and Technology of Food Industry,2011,32(3):453-455.  WANG P,TAO H,JIN Z Y,et al.The final established physicochemical properties of steamed bread made from frozen dough:Study of the combined effects of gluten polymerization,water content and starch crystallinity on bread firmness[J].Journal of Cereal Science,2015,63:116-121.  顾晗烨.扬州包子坯皮面团速冻工艺优化及货架期研究[D].扬州:扬州大学,2016. GU H Y.Study on quick freezing process optimization and shelf life of steamed bread dough in Yangzhou[D].Yangzhou:Yangzhou University,2016.  LUO W H,SUN D W,ZHU Z W,et al.Improving freeze tolerance of yeast and dough properties for enhancing frozen dough quality-a review of effective methods[J].Trends in Food Science & Technology,2018,72:25-33.  YANG S,JEONG S,LEE S.Elucidation of rheological properties and baking performance of frozen doughs under different thawing conditions[J].Journal of Food Engineering,2020,284:110 084.  叶晓枫,韩永斌,赵黎平,等.冻融循环下冷冻非发酵面团品质的变化及机理[J].农业工程学报,2013,29(21):271-278. YE X F,HAN Y B,ZHAO L P,et al.Quality changes and mechanism of frozen non-fermented dough upon consecutive freeze-thaw cycles[J].Transactions of the Chinese Society of Agricultural Engineering,2013,29(21):271-278.  ZHANG Y Y,LI Y,LIU Y L,et al.Effects of multiple freeze-thaw cycles on the quality of frozen dough[J].Cereal Chemistry,2018,95(4):499-507.  朱在勤,崔慧.扬州包子蒸制工艺研究[J].扬州大学烹饪学报,2014,31(2):14-18. ZHU Z Q,CUI H,Study on the steaming process of Yangzhou Baozi[J].Culinary Science Journal of Yangzhou University,2014,31(2):14-18.  冯志强,刘燕琪,李梦琴,等.预醒发冷冻面团馒头工艺参数优化研究[J].食品工业,2017,38(9):190-196. FENG Z Q,LIU Y Q,LI M Q,et al.Study on the pre-proofed frozen dough steamed buns optimization of process parameters[J].Food Industry,2017,38(9):190-196.  GAIKWAD S,ARYA S S.Influence of frozen storage on quality of multigrain dough,Par baked and ready to eat thalipeeth with additives[J].LWT,2018,96:350-356.  范会平,李瑞,郑学玲,等.酵母对冷冻面团发酵特性及馒头品质的影响[J].农业工程学报,2016,32(20):298-305. FAN H P,LI R,ZHENG X L,et al.Effect of yeast products on fermentation characteristics of frozen dough and quality of steamed bread[J].Transactions of the Chinese Society of Agricultural Engineering,2016,32(20):298-305.  王晓曦,范玲,马森,等.麦麸酚基木聚糖对发酵面团特性和馒头品质的影响[J].农业工程学报,2015,31(17):302-307. WANG X X,FAN L,MA S,et al.Effects of phenolic xylans from wheat bran on fermented dough properties and qualities of steamed bread[J].Transactions of the Chinese Society of Agricultural Engineering,2015,31(17):302-307.  王崇崇,马森,谢宇航,等.麸皮对冷冻面团品质的影响[J].河南工业大学学报(自然科学版),2017,38(1):32-36. WANG C C,MA S,XIE Y H,et al.Effect of wheat bran on qualities of frozen dough[J].Journal of Henan University of Technology (Natural Science Edition),2017,38(1):32-36.  李炜炤.冷冻蛋糕生产关键技术的研究[D].广州:华南理工大学,2013. LI W Z.Research on key technologies on frozen cake processing[D].Guangzhou:South China University of Technology,2013.  ASSIFAOUI A,CHAMPION D,CHIOTELLI E,et al.Characterization of water mobility in biscuit dough using a low-field 1H NMR technique[J].Carbohydrate Polymers,2006,64(2):197-204.  DING X L,ZHANG H,WANG L,et al.Effect of barley antifreeze protein on thermal properties and water state of dough during freezing and freeze-thaw cycles[J].Food Hydrocolloids,2015,47:32-40.  CHEN X,WU J H,LI L,et al.The cryoprotective effects of antifreeze peptides from pigskin collagen on texture properties and water mobility of frozen dough subjected to freeze-thaw cycles[J].European Food Research and Technology,2017,243(7):1 149-1 156.  PHIMOLSIRIPOL Y,SIRIPATRAWAN U,TULYATHAN V,et al.Effects of freezing and temperature fluctuations during frozen storage on frozen dough and bread quality[J].Journal of Food Engineering,2008,84(1):48-56.  DING X,ZHANG H,LIU W,et al.Extraction of carrot (Daucus carota) antifreeze proteins and evaluation of their effects on frozen white salted noodles[J].Food and Bioprocess Technology,2014,7(3):842-852.  汤晓娟.产胞外多糖酸面团发酵及其冷冻面团抗冻机理研究[D].无锡:江南大学,2019. TANG X J.Sourdough fermented by exopolysaccharide forming strain:Application and mechanism studies in frozen dough[D].Wuxi:Jiangnan University,2019.  BIGNE F,FERRERO C,PUPPO M C.Effect of freezing and frozen storage on mesquite-wheat dough for panettone-like breads[J].Journal of Food Measurement and Characterization,2019,13(4):2 853-2 861.  JIA C L,YANG W D,YANG Z X,et al.Study of the mechanism of improvement due to waxy wheat flour addition on the quality of frozen dough bread[J].Journal of Cereal Science,2017,75:10-16.  刘倩,郭晓娜,朱科学.黄原胶对冷冻熟面冻藏品质的影响[J].中国粮油学报,2019,34(9):1-6. LIU Q,GUO X N,ZHU K X.Effect of xanthan gum on the frozen storage quality of frozen cooked Noodles[J].China of the Chinese Cereals and Oils Association,2019,34(9):1-6.  CABUK B,YILMAZ B.Fortification of traditional egg pasta (eriste) with edible insects:Nutritional quality,cooking properties and sensory characteristics evaluation[J].Journal of Food Science and Technology,2020,57(7):2 750-2 757.  郑子懿.冷冻面条在储藏期间的品质变化研究[D].郑州:河南工业大学,2013. ZHENG Z Y.Study on change of quality of frozen noodles during frozen storage[D].Zhengzhou:Henan University of Technology,2013.  OLIVERA D F,SALVADORI V O.Effect of freezing rate in textural and rheological characteristics of frozen cooked organic pasta[J].Journal of Food Engineering,2009,90(2):271-276.