共查询到19条相似文献,搜索用时 156 毫秒
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《食品工业科技》2016,(3)
为了研究预处理对黄桃气流膨化干燥的影响,探讨了成熟度、桃丁厚度、烫漂、糖浸渍、冻融和干燥时间对黄桃脆丁产品膨化度、色泽和质构的影响。研究结果表明:成熟度对黄桃脆丁产品的色泽和质构影响较大;烫漂2~3 min可改善黄桃组织结构,提高膨化效果;糖浸渍使黄桃脆丁产品酸甜可口,组织内部充实,利于膨化骨架形成,对产品色泽具有保护作用;冻融可改善产品硬度和色泽,提高品质;预干燥时间对气流膨化的膨化效果和形状保持能力具有重要影响。较适宜的预处理条件为:九成熟的黄桃原料,桃丁厚度2 cm,烫漂2~3 min,糖浸渍浓度6%,冻融1次,预干燥2.5 h。为黄桃干制品产业化生产提供技术支撑。 相似文献
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通过单因素实验法和正交实验法确定合适的烫漂温度、烫漂时间、烫漂液和浸护液配方;通过比较产品色泽和复水比选择理想的干制工艺。研究表明,烫漂液中添加3%的食盐、200mg/L的柠檬酸和400mg/L的D-异抗坏血酸钠;烫漂温度95℃、烫漂时间为4min;浸护液采用10%糊精、10%蔗糖、5%食盐的配方;用真空干燥法得到的荷兰豆嫩荚的干制品色泽及综合品质最好。 相似文献
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漂烫时间对铁核桃雄花序营养成分含量及抗氧化活性的影响 总被引:1,自引:0,他引:1
以‘黔核7号’核桃雄花序为材料,研究不同漂烫时间(0、3、6、9、12、15 min)对核桃雄花序主要营养品质及抗氧化活性的影响。结果表明,漂烫显著降低了核桃雄花序中的灰分、脂肪、蛋白质等常规营养素含量;漂烫3 min可溶性糖、淀粉、可滴定酸、灰分含量明显降低;脂肪含量在漂烫6 min后明显下降;粗纤维和蛋白质含量则在漂烫9 min和12 min后明显降低。漂烫处理对K、Fe、Mn和Zn含量损失严重,其次是Cu、P和B;Mg和Ca含量在漂烫过程中显著升高。漂烫过程中,必需氨基酸的损失率高于非必需氨基酸和总氨基酸,苯丙氨酸和缬氨酸损失率最高。抗氧化物质总酚和总黄酮含量均随漂烫时间的延长而明显下降,抗氧化能力也随之下降,且铁离子还原能力降幅大于1,1-二苯基-2-三硝基苯肼自由基清除能力。结论:为最大程度地保持核桃雄花序的营养价值,在加工和烹饪过程中漂烫时间应控制在3 min以内。 相似文献
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本文研究了芦荟凝胶冻干粉制备过程中芦荟大黄素在常温、40℃、85℃下,不同的漂烫时间过程中(0min、3min、6min)的变化,以及澄清剂处理对大黄素含量的影响。结果表明:大黄素含量随着漂烫时间和温度的增加而相应升高,其中漂烫时间对芦荟大黄素含量的影响更为显著,比较理想的制备工艺为温度为85℃,漂烫时间为6min;通过对芦荟大黄素硼砂体系扫描发现测定芦荟大黄素的最佳波长为445nm。 相似文献
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The effect of temperature and time in a fluidized bed dryer, the concentration of biopolymcr treatment and blanching time on quality attributes of dehydrated carrots was evaluated by response surface methodology. Optimization maximized rehydration ratio and minimized bulk density and carotene loss. Based on surface responses and contour plots, optimum conditions were: drying temperature of 150oC, exposure time of 12.5 minutes, biopolymer concentration of 1.40%, and blanching time of 12 minutes. Experimentally determined values for rehydration ratio, bulk density, and carotene loss in product processed under the optimum conditions were very close to the predicted values of 9.5, 0.05, and 15.7%, respectively. 相似文献
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O.P. Sobukola S.O. Awonorin L.O. Sanni F.O. Bamiro 《International Journal of Food Properties》2013,16(2):379-391
The effect of low-temperature blanching and frying time at a frying temperature of 170°C on moisture and oil contents, breaking force and colour of yam chips was investigated using response surface methodology to establish the optimum blanching conditions and frying time. A central composite rotatable design was used to study the effects of variation in levels of blanching temperature (60–80°C), blanching time (1–5 min) and frying time (2–6 min) on quality attributes of yam chips. The effect of blanching temperature and frying time was more significant than the time of blanching on the quality attributes. The response variables were fitted to predictive models applying multiple linear regressions. Statistical analysis with response surface regression showed that moisture content, oil content, breaking force and L? (lightness) parameter were significantly (P < 0.05) correlated with blanching temperature and time and frying time. However, the regression equation showed a poor fit for a? and b? respectively. The optimum conditions were a blanching temperature of 70–75°C, blanching time of 4–5 min while frying for about 5 min. 相似文献
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为探究合适的防褐变工艺条件,有效抑制生湿面褐变,提高生湿面的商业价值,以高筋粉为主要原料制作生湿面,在单因素实验基础上,以热烫时间、葡萄糖氧化酶添加量、抗坏血酸添加量为影响因子,色差值为响应值,通过Box-Behnken响应面试验对生湿面防褐变工艺进行优化。结果表明:模拟得到生湿面防褐变工艺二次回归方程的预测模型显著,拟合度好,影响生湿面色差值的主次顺序为热烫时间 > 葡萄糖氧化酶添加量 > 抗坏血酸添加量,生湿面最优的防褐变工艺条件为热烫时间77 s、葡萄糖氧化酶添加量为0.03%、抗坏血酸添加量为0.013%,此时生湿面的色差值为2.23,接近预测值,表明此防褐变工艺具备合理可行性,对生湿面的护色效果较佳,为生湿面的褐变问题的解决提供了参考。 相似文献