共查询到19条相似文献,搜索用时 93 毫秒
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测定在25 ℃条件下贮藏期间酵子面包和酵母面包的理化指标及微生物指标的变化,得出面包老化的物性参数变化规律,揭示其抗老化机理。对感官指标、硬度、水分活度、热特性、自由水含量、电镜扫描、破碎率、膨润度、质构分析特性等理化指标及微生物指标进行测定。结果表明:随贮藏时间延长,面包水分含量显著下降,硬度明显上升。与酵母面包相比,酵子面包具有水分含量较高,硬度较小,淀粉颗粒更容易发生团聚等特性,物性学研究结果显示,将传统发酵剂酵子应用于面包生产,具有较好地延缓淀粉回生和老化的效果。确定面包老化的定量物性参数范围,为由定性分析向定量参数分析转变作了有益探索。 相似文献
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中国传统酵子的工业化 总被引:7,自引:0,他引:7
酵子是我国传统的面团发酵剂,对酵子的历史、传统酵子的制作方法、多菌种混合发酵的本质以及酵子工业化生产的难题作了简述,指出了酵子内部的微生物状态是酵子工业化生产的基础,并提出了解决这些难题的一些办法,同时预测了酵子工业化生产的经济、社会效益。 相似文献
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利用高α-淀粉酶活力和高β-淀粉酶活力少根根霉纯培养物,对少根根霉对酵子品质的影响进行研究.试验得出:随着高α-淀粉酶活力少根根霉纯培养物的添加,酵子馒头的高径比呈下降趋势,并呈显著线性相关性;在高α-淀粉酶活力少根根霉纯培养物添加0.75 g时,酵子馒头的比容最大可达到2.1 mL/g(比容的单位对),与满分标准2.3 mL/g较为接近.随着高β-淀粉酶活力少根根霉纯培养物的添加,酵子馒头的白度呈上升趋势,并呈线性相关性;酵子馒头的还原糖含量呈上升趋势,并呈显著线性相关性. 相似文献
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简要介绍有关水刺法非织造布的理化指标,重点阐述直铺梳理成网水刺线中影响强力、吸水量、棉结的因素,并做了定量分析。 相似文献
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Li-Jun Wang Yong-Qiang Cheng Li-Jun Yin Bhesh Bhandari Masayoshi Saito 《International Journal of Food Properties》2013,16(1):131-141
Douchi is a traditional salt-fermented soy product widely consumed in Southern China. The effects of sodium chloride (NaCl) supplementation on color, firmness, pH value, content of soluble protein and amino-type nitrogen of Douchi during processing were investigated. The results indicated that Douchi became dark and soft as the level of NaCl was increased. The contents of soluble protein and amino-type nitrogen increased during processing. The pH value increased in pre-fermentation, but decreased in post-fermentation stages. Lower salt content in Douchi resulted in lower firmness. Salt inhibited the hydrolysis of protein. SDS-PAGE results showed that the Douchi extracts were mainly consisted of low molecular weight peptides (less than 25kDa). 相似文献
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STEPHEN D. KELLEHER ERNEST M. BUCK HERBERT O. HULTIN KIRK L. PARKIN JOSEPH J. LICCIARDELLO RICKARD A. DAMON Jr. 《Journal of food science》1982,47(1):65-70
Storage stability of frozen red hake blocks over a 6-month period was studied under commercial conditions with processing modifications. The rate of DMA formation was significantly greater in samples dipped in polyphosphate and erythorbate compared to a reference (?90°C) or to a 5-day aged sample. There were no significant differences in the rate of decrease of extractable protein nitrogen over the 24-week period. A trained sensory panel found samples from aged fish to be generally more acceptable from a flavor and texture stand-point than the other treated samples. Mechanical shear forces tended to be higher for samples dipped in polyphosphate-erythorbate and lowest for 5-day samples among treated fillets. With proper handling red hake fillets may make a satisfactory commercial frozen block. 相似文献
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Changes in chemical and physical properties of frozen red hake fillets were determined as a function of time. The decrease in protein extractability could be partly reversed by mercaptoethanol. Sodium dodecylsulfate greatly reduced the loss in extractability. Polypeptides that would not enter 10% polyacrylamide gels after treatment with SDS and mercaptoethanol were formed during frozen storage. The rate of decrease of the myosin heavy chain followed first order kinetics with a rate constant of –0.054 per week at –7°C and closely paralleled the appearance of the “cross-linked” peptides. Uniaxial compression moduli correlated well with the dimethylamine produced and the loss of the myosin heavy chain after SDS-PAGE. 相似文献
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杨梅果实在储存过程中质地变化规律的研究 总被引:4,自引:1,他引:3
利用质构仪质地多面分析方法(TPA)研究了杨梅果实在储存期间果肉质地的变化规律.定时测定杨梅贮存过程中硬度、弹性、咀嚼性、粘着性、回复性和凝聚性6个质构参数的变化情况,并分析各质构参数之间的相关性.结果表明.果肉的粘着性、凝聚性、弹性、咀嚼性、硬度参数值呈负相关(R=-0.12~-0.60);凝聚性和硬度、回复性、咀嚼性呈较好的正相关(R=0.89~0.94);弹性与其它质构参数相关性较差.对比了硬度、凝聚性、回复性和咀嚼性参数.用于评价杨梅质地的变化,结果发现硬度、凝聚性、回复性和咀嚼性可灵敏地反映果实质地的变化.储存时间和储存温度对杨梅果实质地的影响显著.储存温度越高,时间越长,杨梅果实的硬度、凝聚性、回复性和咀嚼性的下降越迅速.低温储藏有利于杨梅保鲜. 相似文献