响应面法优化红树莓花色苷超声辅助提取工艺的研究

以红树莓为原料,采用超声辅助法对其中的花色苷进行提取,研究了超声功率、间歇时间、提取时间和提取温度四个因素对花色苷得率的影响。在此基础上,根据中心组合实验设计原理,分析了各因素的显著性和交互作用,优化超声辅助提取参数。最终得到树莓花色苷较优提取工艺条件:超声功率900 W,间歇时间3 s,提取时间50 min,提取温度为50℃。此条件下树莓花色苷的提取得率为0.163 mg/g。      

Enzyme‐assisted aqueous extraction of safflower oil: optimisation by response surface methodology

Aqueous enzymatic oil extraction of safflower seeds was assisted by Alcalase 2.5L and Celluclast 1.5L. Enzyme type and amount, pH, time, temperature, churning rate, dilution ratios and particle size were varied to determine their influence on the oil amount. The amount of oil recovered was higher using seeds ground to a particle size of <0.6 mm. Response surface methodology was employed for the optimisation of aqueous enzymatic oil extraction conducted with Celluclast 1.5L. When the extraction was assisted by Celluclast 1.5L, the maximum oil amount and yield were 33.3 (% w/w) and 79.7 (% w/w), respectively. The optimum conditions were 48.3 °C; 0.25 mL enzyme g^?1 substance; pH, 4.84; resulting oil amount and yield were 28.2 (% w/w) 65 (% w/w), respectively. The predicted critical values were experimentally verified, and an oil amount of 27.1 (% w/w) was achieved. The enzyme treatment did not have any determining effect on the physicochemical properties of extracted oil.     

响应面优化混合酸提取西番莲果皮果胶工艺研究

为充分开发利用西番莲果皮中丰富的果胶资源,研究混合酸对紫果西番莲果皮果胶得率影响,经单因素实验考察并确定各因素最佳条件范围,采用响应面法确定对果胶得率影响最大的三因素:料液比、提取温度、pH的最佳参数值。结果表明,以1∶2混合的盐酸与30%柠檬酸混合酸液对西番莲果皮果胶最佳提取条件为:料液比45∶1(v∶w),pH1.5,提取温度65.5℃,该条件下果胶得率为10.98%,DE值63.77%。      

响应面法优化费菜多酚的提取工艺研究

目的:利用响应面法对费菜中多酚物质的提取条件进行优化。方法:单因素实验基础上选取实验因素与水平,根据Box-Behnken Design（BBD）实验设计原理,采用三因素三水平的响应面分析法,依据回归分析确定各工艺条件的影响因素,以费菜多酚物质含量为响应值作响应面分析实验。结果:在分析各个因素的显著性和交互作用后,得出费菜多酚物质浸提的最佳工艺条件为乙醇体积分数67%,浸提温度41℃,浸提时间2h,料液比1∶25（g/m L）,以焦性没食子酸为标准品,费菜多酚物质一次提取含量可达60.90mg/g。结论:响应曲面回归方程与实验结果拟合性好,此模型合理可靠,可用于实际预测。      

响应面优化超声提取杨桃多酚的工艺研究

利用响应面法对杨桃总多酚的超声提取工艺进行优化。以杨桃为原料,总多酚提取得率为评价指标,在单因素实验的基础上,选取超声时间、乙醇浓度、液料比、超声温度进行了四因素三水平的Box-Behnken中心组合研究,并运用Design Expert 8.05b软件对实验数据进行分析。结果表明,最佳超声提取工艺条件为:超声时间为31 min,乙醇浓度为59%,液料比为53∶1 m L/g,超声温度为60℃,此时杨桃总多酚提取得率为28.5 mg/g。与响应面预测值相比,验证实验结果吻合性良好。      

响应面分析法优化超声波辅助提取柚皮果胶工艺的研究

在超声条件下,研究无机酸种类、p H、超声时间、液料比、提取温度、超声功率等因素对柚皮果胶提取率的影响,通过响应面设计确定最优的超声波辅助提取柚皮果胶工艺参数。结果表明:在选用盐酸作为水解酸时,最佳工艺参数为p H为2.5,液料比为1∶40(g/m L),超声波处理时间为55 min,提取温度为60℃,超声功率为320 W,实测柚皮果胶得率为24.02%。     

响应面法优化鲟鱼精蛋白肽的酶解提取

对鲟鱼-甲骨板加工副产物精巢组织进行酶法提取,建立最佳提取工艺,从而得到功能活性鱼精蛋白肽。实验发现木瓜蛋白酶对鱼精蛋白的酶解度显著高于胃蛋白酶和胰蛋白酶。在以木瓜蛋白酶添加量、液料比、pH值、酶解时间和酶解温度值等条件为对象的单因素实验基础上进一步通过响应面法利用Box-Behnken试验设计原理构建鱼精蛋白肽的酶解提取模型,并得到最佳提取工艺条件:液料比为39.72,木瓜蛋白酶添加量3%,酶解pH 7.0,温度55℃,时间8.22 h。该条件下鱼精蛋白水解度达5.44%,且该鱼精蛋白肽对大肠杆菌和金黄色葡萄球菌抑制显著。     

响应曲面法优化蓝莓渣多酚提取工艺

实验采用乙醇提取蓝莓渣多酚。在单因素实验的基础上,使用DesignExpert7.0软件设计,通过Plackett-Burman实验及响应曲面实验分析确定了乙醇提取蓝莓渣多酚物质的最佳工艺条件为:乙醇浓度60%,液料比20（mL/g）,提取温度80℃,pH2,蓝莓渣多酚提取率为97.01%。      

响应曲面法优化马齿苋多糖提取工艺

利用响应曲面法对马齿苋多糖的提取条件进行优化.在单因素试验的基础上,根据Box-Behnken中心组合设计原理,选取提取温度、提取时间、水料比和提取次数4因素进行响应曲面分析,建立马齿苋多糖得率的二次多项数学模型.在分析各因素的显著性和交互作用后,得出马齿苋多糖提取工艺的最佳条件为:提取温度100℃、提取时间90 min、水料比20:1(v:m)、提取次数3次.在此工艺条件下,马齿苋多糖提取率达24.25%.     

响应面优化超声-微波协同提取紫米原花青素工艺

为提高紫米原花青素的得率,本文采用超声波-微波协同提取紫米中原花青素,以单因素实验为基础,根据中心组合(Box-Behnken)实验设计,采用四因素三水平对主要影响因素进行优化,得到超声波-微波协同提取紫米中原花青素最佳工艺条件为乙醇体积分数50%,液料比22 mL/g,超声功率400 W,超声时间33 min,微波功率350 W,微波时间3.3 min,紫米中原花青素得率7.09%±0.01%。     

响应面法优化牛膝中齐墩果酸超声波辅助提取工艺

以牛膝为原料,以齐墩果酸提取得率为指标,采用超声波辅助提取牛膝中齐墩果酸。分别研究了乙醇浓度、料液比、提取时间对齐墩果酸提取得率的影响,通过响应面实验优化了提取工艺。结果表明,齐墩果酸提取的较佳工艺条件是:乙醇浓度70%,提取时间20min,料液比(w/v)1∶20。在此条件下,齐墩果酸的提取含量为11.14mg/g。      

响应面结合遗传算法优化鹰嘴豆中抗炎活性成分的提取

为优化超声波辅助提取鹰嘴豆异黄酮的提取工艺,以异黄酮提取率为评价指标,考察超声时间、乙醇浓度和料液比对鹰嘴豆异黄酮提取率的影响,在单因素基础上,利用响应面结合遗传算法优化鹰嘴豆异黄酮提取工艺,得到鹰嘴豆异黄酮的最佳提取工艺为：提取时间为1.73 h、乙醇浓度为78.64%和料液比1:24.9 g/mL,鹰嘴豆中异黄酮提取率为0.76 mg/g。以5-脂氧合酶为作用靶点,利用超滤-质谱技术（UF-MS）筛选鹰嘴豆中具有抑制5-脂氧合酶作用的潜在抗炎活性成分。结果表明,利用响应面结合遗传算法可以进一步优化提高鹰嘴豆中活性成分的提取率;鹰嘴豆中具有潜在的抗炎活性成分为大豆苷、大豆苷元、毛蕊异黄酮、后莫紫檀素和鹰嘴豆芽素A,其结合强度分别为40.82%、36.93%、31.65%、28.75%和22.51%。     

Optimization of nobiletin extraction assisted by microwave from orange byproduct using response surface methodology

Nobiletin (NOB) is a well-known polymethoxylated flavone that has only been found in citrus. The objective of this study is to obtain the optimal conditions for extracting nobiletin from sweet orange residues by microwave-assisted extraction (MAE) using response surface method. By using the Box-Behnken experimental design and SAS software 3 independent variables including solid/solvent ratio, microwave power, and treatment time were examined for the response variable nobiletin extraction yield. The regression Eq. 7 statistically significant (p<0.001) and R² was 0.9189. Based on our regression result and considering the feasibility of experiment conduction, we chose the following independent variable values as the optimized conditions for the extraction of NOB: 1:21.91 (g/mL) for the solid/solvent ratio, 14.16 min for the treatment time, and 693.72 W for the microwave power. Under these conditions, the nobiletin yield of 267.8 μg/g of byproduct was achieved.

     

豆渣异黄酮超声提取工艺的响应曲面法优化

根据中心组合试验设计原理.通过30个试验,其中有6个样本的中心点,以异黄酮提取率作为响应值.考察超声时间、超声功率、乙醇浓度和固液比对豆渣异黄酮提取率的影响,确定豆渣异黄酮超声提取的二阶多项式模型.试验结果很好地拟合模型及对85%以上的差异做了解释,最优化的条件为66%乙醇、液固比 1:20、超声功率586 W、超声时间 34 min,浸提率可达 1.204%.试验值在95%的置信区间符合预测值,从而表明,RSM 优化的模型适合于豆渣异黄酮的提取.     

Optimisation of microwave‐assisted extraction of prune (Prunus domestica) antioxidants by response surface methodology

Optimal conditions for microwave‐assisted extraction (MAE) of total phenols (TP), epicatechin gallate and antioxidant activity from prune (Prunus domestica), rejected in transformation process of plum to prune, were determined by response surface methodology. The central composite design was used to study the effects of three independent variables: microwave power, irradiation time and solvent polarity on the TP, epicatechin gallate and antioxidant activity. Epicatechin gallate was identified as a major phenolic compound in prune extract by RP‐HPLC. Microwave power and irradiation time significantly affected all responses (P < 0.01). The highest TP (598.89 mg GAE/100 g prune) was obtained using water as an extraction solvent at 500 W, during 115 s. However, the optimal conditions for epicatechin gallate extraction were ethanol 80%, 435 W and 120 s. MAE is more efficient than conventional extraction method to obtain TP from prune. The experimental values were reasonably close to the predicted values confirming the validity of the predicted models.