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采用超声波法提取南瓜籽油,筛选了提取南瓜籽油的理想溶剂,通过单因素试验和正交试验考察了提取温度、提取时间、液料比、超声频率和功率对南瓜籽油得率的影响,结果表明:石油醚为提取南瓜籽油的理想溶剂;各因素对南瓜籽油得率的影响大小依次为:液料比>超声时间>超声温度>超声频率和功率;优化的提取工艺参数为:液料比6:1(V/W)、超声频率和功率59kHz、280W、提取温度60℃、提取时间35min,此条件下无壳瓜籽油的得率达39.04%。 相似文献
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以番茄皮渣为原料,采用超声辅助提取工艺,研究提取溶剂种类、超声功率、液固比、提取时间、提取温度对番茄红素提取效果的影响,通过响应面试验分析,确定最佳工艺条件为:皮渣经95%乙醇溶液处理后,以乙酸乙酯为提取溶剂,提取温度50 ℃、提取时间45 min、液固比5∶1(mL/g)、超声功率270 W。产物经高效液相色谱-质谱测定,番茄红素提取量可达到250.1 mg/kg。通过组织结构观察,与传统提取方法相比,超声提取能有效破坏植物组织结构,提高提取效果。 相似文献
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利用响应面分析法对豌豆胰蛋白酶抑制剂超声辅助粗提工艺进行优化。通过单因素试验筛选最佳单因素条件:样品颗粒度80目、超声频率40 kHz、超声时间13 min、超声温度40℃、料液比1∶80(g/mL)、超声功率500 W。在单因素试验基础上,选取超声时间、超声温度、料液比、超声功率为自变量,胰蛋白酶抑制剂总活性为响应值,根据Box-Behnken试验设计原理采用四因素三水平的响应面分析法,并且建立二次多项式回归方程的预测模型。根据回归模型,在超声频率40 kHz、样品颗粒度80目的条件下,确定豌豆胰蛋白酶抑制剂总活性最高的优化组合为超声时间16 min、超声温度50℃、料液比1∶100(g/mL)、超声功率500 W,豌豆胰蛋白酶抑制剂总活性为574.54 TIU/g,与理论预测值582.80 TIU/g相比,其相对误差为1.42%;R_(Adj)~2=0.886 4,R~2=0.943 2,说明该模型拟合程度较好,通过响应面优化后得出的回归方程具有一定的实践指导意义。 相似文献
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番茄红素不同提取工艺及其对性质影响 总被引:1,自引:0,他引:1
以新鲜番茄为试材提取番茄红素,比较研究微波法和有机溶剂浸提法两种工艺及其对番茄红素性质影响。结果表明,最佳提取溶剂为氯仿-丙酮(2:1);有机溶剂浸提最佳条件为:浸提温度40℃,料液比1:4,提取时间70min,浸提次数3次,提取率为89.89%;微波提取最佳条件为:料液比1:3,微波功率360W,微波时间15s,提取次数2次,各因素中微波功率和微波时间影响最小,微波起辅助作用,提取率为97.58%,比有机溶剂浸提高出7.69%,且节省时间和溶剂;微波提取所得产品纯度较高,无溶剂痕量残留。两种工艺所得番茄红素性质基本相同,对光、高温、酸、高浓度NaSO3,高浓度Ca2+和Cu2+,Fe3+等不稳定;对氧化剂、低浓度NaSO3、碱、Na+、K+、苯甲酸钠、Vc和柠檬酸等基本稳定,且弱碱有轻微增色作用。 相似文献
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以海南产紫参薯为原料,采用Box-Behnken中心组合试验设计优化紫参薯花青素的超声-微波协同萃取工艺。分别采用时间模式与恒温模式两种方法,在单因素试验基础上,以花青素提取率为响应值,采用三因素三水平的响应面分析法进行试验。结果表明:恒温模式时,在额定超声功率50W、料液比1:48(g/mL)、萃取时间283s、微波控制温度46℃工艺条件下,紫参薯提取率达79.38%,较时间模式下高10.63%,超声-微波协同萃取的总花青素质量浓度为48.42mg/L,即4.37mg/g。 相似文献
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利用超声波技术提取珍珠香菇多糖.以珍珠香菇多糖提取率为考察指标,在单因素试验基础上,通过正交试验探讨了超声时间、超声功率、料液比、提取温度对珍珠香菇多糖提取率的影响.确定利用超声波提取珍珠香菇多糖的最佳工艺参数为:超声功率160W,超声时间60 min,料液比为1:25,提取温度60℃.所得香菇多糖提取率为7.71%. 相似文献
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In this study, we optimized the process for extracting lipids and proteins from wet biomasses of Spirulina sp. using a 4-kHz ultrasonic osmotic shock method with ultrasound enhancement at a constant frequency of 40 kHz. Optimization was conducted using a response surface methodology (RSM) at an osmotic NaCl concentration of 10–30%, solvent:biomass ratio of 5–15 v/w, and extraction times of 20–50 min. The present osmotic shock method with ultrasound irradiation increased lipid yields to 6.65% in the presence of 11.9% NaCl, a solvent:biomass ratio of 12:1 v/w, and a 22-min extraction time, and protein yields to 43.96% with 15.12% NaCl, a solvent:biomass ratio of 10:1 v/w, and a 30-min extraction time. 相似文献
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本文以茉莉花为原料,通过比对水、乙醇和8种低共熔溶剂在内的10种溶剂,以及超声波和微波提取,旨在探索一种绿色、高效的茉莉花黄酮提取技术。通过单因素试验考察低共熔溶剂的摩尔比、含水量、液料比、超声时间以及超声功率对黄酮得率的影响。在单因素的基础上,采用响应面法对提取工艺进行优化。研究表明:茉莉花黄酮最优提取技术为超声波辅助-绿色低共熔溶剂提取;最佳工艺条件为:甜菜碱盐酸盐:蔗糖:水=1:1:94.50,液料比为149:1 (mL/g),时间为20 min,超声功率为90 W,此条件下提取量为15.24 mg/g,实验结果与响应面模型预测值接近,表明模型适用。茉莉花黄酮经此工艺所得的提取量是传统水提的677%、正交优化超声波提取的200%,充分表明超声波辅助-绿色低共熔溶剂提取技术的高效性。研究结果为茉莉花资源的进一步开发利用提供数据支撑。 相似文献
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分别对软枣猕猴桃多糖超声辅助提取工艺及乙醇沉淀工艺进行优化。以软枣猕猴桃多糖提取率为响应值,以超声功率、超声时间、液料比为自变量,利用响应面分析法,确定超声辅助提取软枣猕猴桃多糖的最佳工艺条件;以软枣猕猴桃多糖提取率为响应值,以乙醇体积分数、乙醇用量、醇沉时间为自变量,确定乙醇沉淀软枣猕猴桃多糖的最佳工艺条件。结果表明:超声辅助提取软枣猕猴桃多糖的最佳工艺条件为超声功率260W、超声时间8min、液料比6:1(mL/g),在此条件下,软枣猕猴桃多糖提取率达到1.48%(m/m);乙醇沉淀软枣猕猴桃多糖的最佳工艺条件为乙醇溶液体积分数90%、乙醇用量为浓缩液的7倍、醇沉时间4h,在此条件下,软枣猕猴桃多糖提取率达到1.55%(m/m)。 相似文献
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K. Mahdavee Khazaei S. M. Jafari M. Ghorbani A. Hemmati Kakhki M. Sarfarazi 《Food Analytical Methods》2016,9(7):1993-2001
Optimum extraction conditions of anthocyanins from petals of saffron (Crocus sativus) using acidified ethanol as the solvent were revealed. The investigated factors were solvent to sample ratio (20:1–80:1), ethanol concentration (%), extraction temperature (25–45 °C), and time (8–24 h). Response surface methodology with Box–Behnken design was applied to determine optimum processing conditions leading to maximum extraction efficiency (mg cyanindin-3-glucoside/l). Obtained coefficients of variance showed that the linear effect of temperature was more pronounced for extraction yield than three other variables at 5 % level. Optimum extraction conditions that maximize the extracted anthocyanins were found to be a ratio of solvents to sample 20 ml/g, ethanol concentration of 25.02 %, temperature 25.8 °C, and extraction time 24 h which gave 1609.11 mg/l anthocyanins. A quadratic regression equation describing the effects of independent process variables on anthocyanin extraction from saffron petals can be used for finding optimum conditions to achieve desired extraction yield in similar conditions. 相似文献
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Leila Gorgani Maedeh Mohammadi Ghasem D. Najafpour Maryam Nikzad 《Food and Bioprocess Technology》2017,10(12):2199-2207
Piperine is the natural bioactive component of black pepper (Piper nigrum L.) with several astounding therapeutic properties. In this study, sequential microwave-ultrasound-assisted extraction approach was used for isolation of piperine from black pepper. The effect of various factors such as extraction solvent, particle size of pepper, solvent to solid ratio, microwave power and time and ultrasound temperature and time on the extraction yield of piperine was considered. The maximum extraction yield was 46.6 mg piperine/g pepper which was obtained using ethanol as solvent at the particle size of 0.15 mm, solvent to solid ratio of 20:1, microwave power of 100 W for 1 min, and ultrasound temperature of 50 ° C for 30 min. This extraction yield was higher than those obtained by Soxhlet (39.1 mg/g), microwave-assisted (38.8 mg/g) and ultrasound-assisted (37.0 mg/g) extractions. The purity of the extracted piperine was 81.4% as determined by HPLC analysis. The FTIR and UV-vis analyses confirmed that the structure of piperine remained intact after extraction and purification which is very important for medicinal applications. 相似文献