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以蜈蚣藻多糖和蜈蚣藻多糖与卡拉胶复配胶为涂膜基质,以CaCl2 和甘油为成膜助剂,配制成复合涂膜保鲜剂,研究常温(28~32℃)、相对湿度68%~86% 条件下该复合涂膜保鲜剂对杨梅品质及其生理生化变化的影响。结果表明:常温下经蜈蚣藻多糖和蜈蚣藻多糖与卡拉胶复合涂膜保鲜剂涂膜保鲜的杨梅与对照组相比,果实裂果率、霉烂率、失重率明显降低,抑制了果实的呼吸率;有机酸、VC 等营养成分转化、流失的速度减慢,有效抑制了MDA、花青素含量和相对电导率的升高,使PPO、POD、PAL 酶活性处于较低的水平,延缓果实的衰老过程。其中,蜈蚣藻多糖涂膜保鲜剂的效果优于蜈蚣藻多糖与卡拉胶复合涂膜保鲜剂。 相似文献
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槐豆胶与黄原胶复配胶的流变性研究 总被引:1,自引:0,他引:1
对槐豆胶、黄原胶及其复配胶的流变性进行了研究。结果表明,槐豆胶和黄原胶有强烈的协效增稠性,槐豆胶与黄原胶复配胶的粘度随着浓度的升高而升高;复配胶为“非牛顿流体”;复配胶溶液的最佳加热温度和加热时间为60℃,加热60min;pH对复配胶的粘度有一定的影响;冻融变化使槐豆胶和黄原胶复配胶的粘度有较大幅度的增加。 相似文献
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以长角豆胶与黄原胶复配胶为涂膜基质,添加具抑菌作用的中草药制剂五倍子、大黄以及NaCl 等成膜助剂,配制成中草药复合涂膜保鲜剂,用扫描电子显微镜观察此保鲜剂所成复合膜的表面形貌,并以番荔枝为实验材料,对其进行涂膜处理,研究中草药复合涂膜保鲜剂对番荔枝品质变化的影响。结果表明:中草药复合涂膜保鲜剂可形成一层致密、较均匀的膜,能抑制番荔枝果实中有机酸、VC 等营养成分的消耗,降低失重率、裂果率、腐烂率和可溶性固形物转化速度,延缓后熟软化过程,抑制呼吸强度,降低细胞膜脂过氧化程度,从而延缓果实衰老,有较好的保鲜效果。 相似文献
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介绍胶基糖对香精香料的要求,胶基糖的香味评价,香精对胶基糖生产的影响,胶基糖香精的质量问题和可能原因分析,香精水溶性的快速测定,一些胶基糖配方的设计思路和一些花色品种的研发创意。 相似文献
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介绍胶基糖对香精香料的要求,胶基糖的香味评价,香精对胶基糖生产的影响,胶基糖香精的质量问题和可能原因分析,香精水溶性的快速测定,一些胶基糖配方的设计思路和一些花色品种研发创意。 相似文献
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玉米醇溶蛋白替代口香糖中胶基的应用效果分析 总被引:2,自引:2,他引:2
通过对比实验以及对实验结果进行统计分析和产品的感官评定,确定玉米醇溶蛋白替代胶基的最佳比例。在对比实验中确定四个水平,即100%、75%、50%、25%替代,并通过对其理化性质分析和感官评定,确定其最佳比例是25%。 相似文献
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桃胶与阿拉伯胶都可用于食品增稠剂,本文对其透明度、稳定性、表面张力、保持香气能力等方面与阿拉伯胶进行了比较,并对流变曲线进行了测定,对温度、pH和电解质对它们粘度的影响进行了研究和比较。从研究结果来看,桃胶与阿拉伯胶的流变性质相似,甚至有些性质方面,桃胶要明显优于阿拉伯胶。 相似文献
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A Casas A
F Mohedano F García‐Ochoa 《Journal of the science of food and agriculture》2000,80(12):1722-1727
The viscosity of diluted guar gum solutions and the viscosity of xanthan and guar gum mixture solutions have been studied. Guar gum solutions showed pseudoplastic behaviour. Apparent viscosity increased with gum concentration and decreased with the temperature at which viscosity was measured. A maximum in the plot of viscosity versus increasing dissolution temperature was observed at 60 °C. This behaviour was related to differences in molecular structure of the polymers solved at different temperatures. Mixtures of xanthan and guar gum showed a higher combined viscosity than that occurring in each separate gum. This synergistic interaction was affected by the gum ratio in the mixture and dissolution temperature of both gums. The effect of polysaccharide concentration (1.0, 1.5 and 2.0 kg m−3), xanthan/guar gum ratio (1/5, 4/2, 3/3, 4/2 and 5/1) and dissolution temperature (25, 40, 60 and 80 °C for both gums) on the viscosity of solutions of mixtures were studied. The highest viscosities were observed when 2.0 kg m−3 gum concentration was used together with a ratio of xanthan/guar gum of 3/3 (w/w) and dissolution temperature of 40 and 80 °C for xanthan and guar gum, respectively. © 2000 Society of Chemical Industry 相似文献
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降解黄原胶与降解瓜胶在一定条件下共混,形成凝胶体系.通过对其流变特性进行研究,表明该体系具有显著的黏弹性和剪切变稀性.考察了总胶浓度、蔗糖、共混比例及降解食品多糖的分子量等因素对共混凝胶体系流变特性的影响.研究了该凝胶体系的本构方程,结果表明,修正Williamous-Oldroyld-4参数模型可确切描述凝胶体系的黏度曲线,计算值与实验值吻合良好. 相似文献
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Fenugreek gum (extruded and non-extruded) was substituted for wheat flour at 0%, 5% and 10% (w/w) and the rheological effects and breadmaking characteristics were determined. Bread containing fenugreek gum (FG) at 5% and 10% showed volumes and texture comparable with a control bread. Quality was high due to sheeting the dough twice as well as the use of the three-fold-turn puff pastry laminating method during processing of dough, instead of the standard rounding of dough. The three-fold-turn method is believed to have caused a higher incorporation of air into the dough as well as facilitated better distribution and incorporation of the fenugreek gum into bread dough. Extruding FG also improved its solubility in bread. Fenugreek gum (FG) resulted in an increase in dough farinograph water absorption compared with the control, but extruding the gum caused an even greater increase in water absorption when compared with the non-extruded gum. The addition of FG to bread dough caused an increase in G′ and G″. Starch pasting using RVA showed an increase in peak viscosity, final viscosity, breakdown and setback in a dose-related response when compared with a control. 相似文献