共查询到18条相似文献,搜索用时 78 毫秒
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柑橘属(Citrus)果汁因其中含有柚皮苷和柠碱(柠檬苦素)2种苦味物质而影响其口感,如果不能全部或大部分去除,会严重阻碍柑橘加工业的进一步发展.目前柑橘类果汁的脱苦方法主要有吸附法、添加苦味抑制剂抑制法、固定化酶法、加热脱苦法等.综述了柑橘属果汁的苦味机理及脱苦机理、效果及商业应用前景,以期为柑橘果汁产业脱苦工艺提供参考. 相似文献
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几种柑橘类果汁中主要苦味物在加工过程中含量变化的研究 总被引:2,自引:0,他引:2
目的:研究榨汁温度、热处理、过滤等加工技术对几种柑橘类果汁主要苦味成分的影响, 为脱苦工艺提供试验依据.方法:采用高效液相色谱法检测3种柑橘类果汁中柚皮苷和柠檬苦素类化合物的含量, 比较不同的预处理方式、加热温度、加热时间对其含量的影响.结果:不同品种的柑橘果汁的主要苦味物质含量差别较大, 果实预冷至4℃后榨汁可减少苦味,果汁苦味物随热处理温度的升高而增加, 同时柚皮苷和柠檬苦素类化合物的含量分别在加热至20 min和15 min时达到最大值.结论:榨汁温度、热处理、过滤等加工技术对柑橘类水果的苦味物质含量具有重要的影响,控制适宜的工艺参数有利于减少果汁中苦味物质的含量.该研究对于柑橘果汁的脱苦工艺具有重要的参考价值. 相似文献
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目的利用β-环糊精对佛手果汁进行脱苦,探讨了β-环糊精对佛手果汁的脱苦效果。方法在单因素实验的基础上,通过响应面设计确定最佳脱苦条件。结果β-环糊精添加量、温度、作用时间对佛手果汁脱苦均有显著影响;优化工艺条件为:β-环糊精添加量0.78g/100 mL,温度44℃,作用时间42 min。在该优化工艺条件下,柚皮苷和柠檬苦素的脱除率分别为22.12%和19.32%;同时,佛手果汁中Vc、多糖、黄酮的含量分别为7.01 mg/100mL、49.71 mg/100 mL和6.74 mg/100 mL。结论利用β-环糊精对佛手果汁进行脱苦的方法可行,效果明显。 相似文献
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柑橘类果汁混浊稳定化研究进展 总被引:2,自引:0,他引:2
柑橘类果汁的混浊稳定状态是其品质评价的重要指标,也是柑橘类果汁加工技术中的关键。综述了柑橘类果汁中混浊体系的组分构成及功能,柑橘类果汁的混浊稳定状态的各类影响因素以及加工生产中维持混浊稳定方法等方面的研究进展.以期为柑橘类果汁的混浊稳定问题的解决提供参考依据。 相似文献
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Naringinase from Aspergillus niger was prepared and characterized to evaluate its effectiveness in debittering citrus juice. The enzyme was purified to homogeneity by sulfate fractionation and chromatographies on Q-Sepharose, Sephacryl S-200, and S-100 HR columns, and estimated by gel filtration chromatography (GFC) to have a molecular weight (MW) of 131 kDa, of which its subunit was measured by sodium dodecyl sulfate-polyacrylamide gel electrophoresis to be around 65.5 kDa. The enzyme showed active and stable pH ranges both within 4.5 to 5.0. Its optimal temperature was in the range of 45 to 55 °C. Freeze drying provided an estimated enzymatic recovery of 95.9%, greater than spray drying with the recovery at 55.6%. The freeze-drying powder could retain its enzymatic activity stably at 4 °C for 6 mo. Also, the enzyme in 0.220 U/mL citrus juice could sufficiently remove the naringin for the bitterness. Oral acute toxicity study revealed the maximum tolerated dose (MTD) of the naringinase powder was >10 g/kg in mice. The contents of arsenic (As), lead (Pb), mercury (Hg), the aerobic plate count, and coliform number in the enzyme powder all met the criteria for food use. These characteristics suggest that the naringinase from A. niger is efficient and suitable for debittering the citrus juice, and the process consisting of fermentation, salt precipitation, ion exchange, ultrafiltration, and freeze drying is a promising means to prepare the naringinase for food industry, setting up a strong base to enzymatically debitter citrus juice. PRACTICAL APPLICATION: This study focused on characterization, preparation, and validation of naringinase from A. niger, which provided useful information on how to prepare, store, and use the naringinase. In addition, this naringinase met the safety standards for food use and showed strong ability to remove the bitter taste from citrus juice, which provided useful information for interested readers, and the food industry. 相似文献
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柑桔汁中的果胶酯酶及其钝化特性 总被引:2,自引:0,他引:2
果胶酯酶(PE或PME)的活性是导致柑桔汁混浊态的丧失的主要原因,因此研究其理化性质,钝化其活性对提高柑桔汁质量意义重大。介绍了柑桔汁中果胶酯酶的性质及钝化其活性的一些措施。 相似文献
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