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目的优化红枣(Zizyphus jujube)环磷酸腺苷(cAMP)索氏提取工艺。方法以料液比、超声提取时间、索氏提取时间为影响因素,采用单因素试验和正交试验对超声波辅助索氏提取法提取红枣环磷酸腺苷的工艺进行优化,在此基础上,采用大孔吸附树脂法对粗提物进行纯化。结果单因素实验结果发现,环磷酸腺苷的提取率随料液比的增加而升高,当料液比超过1:25后趋于稳定;随超声提取时间的增加先升高,25 min后略有下降;随着索氏提取时间增加而升高。对正交试验极差分析和方差分析发现料液比(A)对红枣环磷酸腺苷的提取影响显著,超声时间(B)、索氏时间(C)对红枣环磷酸腺苷的提取影响不显著。各因素影响先后顺序为ABC,最佳提取条件为料液比1:30,超声时间30 min,索氏提取时间5 h,此时提取率达到1591.16μg/g。结论超声波辅助索氏提取法能增强红枣环磷酸腺苷的提取率。 相似文献
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山楂中熊果酸的超声提取及抗氧化性研究 总被引:2,自引:0,他引:2
采用索氏提取法与超声波法提取山楂中的熊果酸,探讨了山楂中熊果酸超声提取工艺的影响因素,并对熊果酸抗氧化性进行了研究。结果表明:超声波法与索氏提取法相比,熊果酸得率大大提高。通过单因素法和正交实验法得出超声波提取的优化条件为:以50%乙醇为溶剂,功率90W、时间50min、温度50℃、料液比1∶40;熊果酸有较强的清除自由基能力,表现出明显的抗氧化性。 相似文献
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苦荞麦富含黄酮。比较了索氏提取法和超声波提取法提取苦荞麦黄酮的效果,结果发现超声波提取法效果较佳。对超声波提取法的条件进行了优化,优化的结果为:以体积浓度80%乙醇为提取剂,超声温度70℃,超声时间10 min,浸提4 h。 相似文献
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以苹果籽为原料,以传统的索氏提取法为参照,采用超声波法辅助提取苹果籽油,研究超声功率、超声时间、超声温度、溶剂用量和物料粒度等单因素对苹果籽出油率和提取率的影响,在单因素的基础上,优化超声波辅助提取条件,并分析苹果籽油的脂肪酸组成,结果表明在粉碎粒度为50目、超声温度45℃、溶剂液料比7:1(mL:g)、超声功率为400 W、超声时间为30 min的条件下苹果籽油的出油率和提取率最高.GC-MS分析表明苹果籽油主要含不饱和脂肪酸,以亚油酸、油酸、棕榈酸为主,三者的含量总和占总脂肪酸总量的93%,索氏法和超声辅助法获得的油的成分没有明显差异. 相似文献
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Direct supersonic steam injection, direct steam infusion, and indirect tubular heating were each applied to protein-enriched skim milk-based beverages with 4, 6 and 8% (w/w) total protein, and the effect of final heat temperature on the physical properties of these beverages was investigated. Supersonic steam injection resulted in significantly lower levels of denaturation of β-lactoglobulin (34.5%), compared to both infusion (76.3%) and tubular (97.1%) heating technologies. Viscosity, particle size and accelerated physical stability of formulations did not differ significantly between the heating technologies, while noticeable colour differences due to heat treatment (mainly attributed to increasing b* value) were observed, particularly for tubular heating. Overall, the extent of protein denaturation in high-protein dairy products was significantly influenced by the particular heating technology applied. The application of supersonic steam injection technology, with rapid heating and high shear characteristics, may enable differenciated product characteristics for ready-to-drink ambient-delivery high-protein dairy beverages.Industrial relevanceThe design and application of novel direct supersonic steam injection technology was comprehensively studied and found to provide significant benefits over direct steam infusion and indirect tubular heating technologies for skim milk-based protein beverages. This type of injection heating system resulted in heat-treated formulations with lower levels of denatured whey proteins, compared to tubular and infusion heating, offering an alternative opportunity to the industry in terms of producing shelf-stable dairy protein beverages. 相似文献
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