共查询到20条相似文献,搜索用时 15 毫秒
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为高效提取桑叶中1-脱氧野尻霉素(DNJ),选取影响桑叶中DNJ提取效果的4个因素——提取温度、超声波处理时间、超声波功率、固液比,通过单因素试验确定影响因素的水平,然后在此基础上采用四因素三水平的响应面分析法(RAM),依据回归分析优化超声波辅助提取桑叶中DNJ的工艺方法。试验结果表明:超声波辅助提取桑叶中DNJ的优化条件为提取温度48.58℃,超声波处理时间40.67min,超声波功率199.99W,固液比1:11.97。该条件下,DNJ的提取得率可达到99%。与传统方法相比,采用超声波辅助提取DNJ,大大缩短了提取时间,提高了有效成分的得率,是一种极具应用前景的方法。 相似文献
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V. A. Jideani R. H. Oloruntoba I. A. Jideani 《International Journal of Food Properties》2013,16(2):272-281
Optimisation of fura production using response surface methodology was studied. The quadratic polynomial regression model was adequate and acceptable at 0.05% level for predicting shear stress (SHS), shear strength (SHT), and hardness of fura (HOF)). The importance of process variables (cooking time (CKT), flour hydration time (FHT) and water added (WAD)) on texture of fura is in the order; FHT (X2) > WAD (X3) > CKT (X1). The FHT and WAD were the most important factors affecting the textural properties of fura. The optimal SHS (6.1 kN/m2) was obtained with FHT (1.36 hr), CKT (34.3 min) and WAD (21 ml). The optimal SHT (4.6 kN/m2) was obtained with FHT (1.1 hr), CKT (18.9 min) and WAD (25 ml). The optimal HOF (57.7 kN) was obtained with FHT (53.4 min), CKT (17.4 min) and WAD (21.8 ml). The shape of the predicted responses was saddle, i.e., a maximum or minimum response was found at various combinations of the independent variables. 相似文献
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响应面法优化鹰嘴豆蛋白提取工艺 总被引:2,自引:0,他引:2
以脱脂鹰嘴豆粉为材料,采用碱溶酸沉法提取鹰嘴豆蛋白,利用单因素试验和响应面法对鹰嘴豆蛋白的提取工艺条件进行分析与优化。结果表明,碱溶酸沉工艺参数对鹰嘴豆蛋白提取率有显著影响,因素影响主次顺序为pH值>液料比>提取时间。鹰嘴豆蛋白碱溶酸沉提取优化工艺参数:pH11.0、液料比17.7:1(mL/g)、提取时间88.4min、提取温度20℃,蛋白提取率达到82.33%。所得鹰嘴豆蛋白提取回归模型高度显著(R2=0.9630),拟合性好,可用于预测蛋白提取率。 相似文献
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Response Surface Methodology (RSM) was used to evaluate the effects of synthetic variables such as reaction time (6–12 hr), temperature (130–150°C), and substrate molar ratio of fatty acid methyl esters (FAME) of peanut oil to sucrose (10:1 to 14:1) on the % molar conversion to sucrose polyester, utilizing 10g of free sucrose as the reactant. Optimization of the synthetic reaction was performed by canonical analysis to derive the stationary point. Based on contour plots and canonical analysis, optimum conditions were: reaction time 11.5 hr, synthetic temperature 144°C, and substrate molar ratio 11.4:1. Predicted molar conversion was 43.39% (10g sucrose synthesized 29.4g sucrose polyester) at the optimum point. Experimental data indicated up to 48.4% yield based on theoretical % molar conversion. 相似文献
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利用响应面分析法对绿色木霉菌的培养基进行优化。通过测量不同营养条件下绿色木霉菌落生长直径研究其生物学特性,在单因素实验的基础上,选定葡萄糖添加量、丙氨酸添加量和磷酸二氢钾添加量3个因素进行中心组合实验,建立二次回归方程,并应用响应面分析法进行优化。结果表明,绿色木霉菌最佳培养基为葡萄糖2.11 g/dL、丙氨酸0.15 g/dL、磷酸二氢钾0.30 g/dL。在此条件下培养的绿色木霉菌菌落生长直径达到78.00 mm,与预测值77.87 mm接近(CI>95%)。 相似文献
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采用响应曲面法的Box-Behnken实验设计,考察TEMPO诱导氧化预处理工艺中,TEMPO、NaBr、NaC1O的用量对氧化反应时间和氧化程度(NaOH的消耗量)的影响.研究结果表明:随着TEMPO和NaBr用量增加,氧化反应速率加快,反应时间缩短,氧化程度略有减小;随着NaC1O的用量增加,氧化反应时间延长,氧化程度与之成线性增加趋势.通过Design-Expert软件在预设目标值的前提下,依据回归模拟方程优化得到了最佳的工艺条件:TEMPO用量0.024 mmol·g-1、NaBr用量2.50 mmol·g-1、NaC1O用量7.13 mmol·g-1,在此条件下进行了验证实验,其反应时间为56.76 min,NaOH的消耗量为35.05 mL,与回归方程的预测值非常接近.在优化的工艺条件下,对纤维素进行了TEMPO氧化预处理,然后进行机械法研磨,最终制备得到了纳米纤化纤维素(NFC). 相似文献
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以狗枣猕猴桃叶粗多糖得率为响应值,在单因素试验的基础上,采用三因素三水平响应面分析法(RSM),研究超声辅助提取各因素对狗枣猕猴桃叶粗多糖得率的影响,优化超声辅助提取狗枣猕猴桃叶粗多糖最优工艺;利用DPPH自由基清除试验,测定狗枣猕猴桃叶多糖的抗氧化活性。结果表明:超声辅助提取狗枣猕猴桃叶粗多糖最优工艺为超声功率989.61 W,提取时间20.00 min,液固比为80∶1(m L/g),狗枣猕猴桃叶粗多糖得率理论值为5.59%,设定超声功率990 W,提取时间20.00 min,液固比80∶1(m L/g)进行验证试验,狗枣猕猴桃叶粗多糖得率为5.41%。在此条件下得到的狗枣猕猴桃叶多糖具有清除DPPH自由基的能力,清除能力与浓度大小相关。 相似文献
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ABSTRACT: Response surface methodology (RSM) was used to determine the optimum combinations of 3 factors, cooking time (40 to 120 min), inoculated bacteria populations (101 to 109 cells/100 g), and fermentation time (12 to 36 h) for producing black soybean natto. All of the responses (hardness, viscosity, and trichloacetic acid-soluble nitrogen) were significantly affected by the 3 factors. Fermentation time was the most important factor affecting quality of black soybean natto. Optimum combinations were cooking time 110 min, inoculated bacteria populations 102 to 104 cells/100 g, and fermentation time 30 to 33 h. 相似文献