正交试验优选超声提取芦笋总皂苷的工艺

目的:优选超声提取芦笋总皂苷的最佳工艺。方法:以高氯酸作为显色剂,用紫外分光光度法测定芦笋中总皂苷的含量,并以提取率为评价指标,采用单因素实验和正交试验优选最佳提取工艺。结果:芦笋总皂苷超声提取的最佳工艺为乙醇浓度70%,料液比1:15(W/V),超声时间50 min,超声温度40℃。结论:该提取工艺可行,为芦笋总皂苷的进一步研究提供了依据。     

超声波法提取大枣多糖工艺的优化

为了进一步提高大枣多糖的提取效率,本文通过正交试验优化了超声波法提取大枣多糖的工艺条件。考察的因素包括料液比、超声功率、超声时间和浸提温度。结果显示超声波法提取大枣多糖的最佳提取工艺条件为:料液比1∶30、超声功率80W、超声时间10min,浸提温度80℃。在此工艺条件下大枣多糖的提取率达到6.97%。该工艺条件下提取率较高,因此适合于提取大枣中的多糖类化合物。     

响应面优化超声辅助提取刺梨多糖工艺研究

探讨超声波作用下刺梨多糖提取的最佳工艺条件。在单因素试验基础上,采用响应面法对刺梨多糖提取工艺参数进行优化研究。响应面试验表明提取温度、超声功率、超声时间、液料比对响应值刺梨多糖提取率均有显著影响,优化得到超声辅助提取刺梨多糖最佳工艺条件为:超声时间30 min,超声功率120 W,液料比40m L/g,提取温度80℃,提取3次。在此条件下的刺梨多糖提取率可达2.18%,与模型预测值非常接近。     

粗柄羊肚菌菌丝体多糖及胞外多糖的提取工艺

为了研究粗柄羊肚菌菌丝体多糖及胞外多糖的最佳提取工艺条件,采用超声波提取菌丝体多糖、菌丝体发酵液浓缩提取胞外多糖的方法。通过单因素试验和L9(34)正交试验设计,探讨二者的最佳提取工艺条件。研究结果表明菌丝体多糖的最佳提取工艺条件:料液比1∶20(g∶m L),超声波处理温度70℃,超声时间20 min,超声提取次数2次;胞外多糖的最佳提取工艺条件:浓缩倍数1∶5,浓缩温度50℃,醇沉浓度95%,p H为6。该项工艺研究得到菌丝体粗多糖平均含量56.761 2 mg/g,胞外多糖平均含量1.275 4 mg/m L,多糖产量稳定,且此试验方法稳定可行。     

蕨菜多糖超声波辅助提取及其药理活性初步研究

为优化蕨菜多糖的提取工艺,同时检测蕨菜多糖的药理学活性。实验采用超声波辅助提取法,在单因素试验的基础上,考察液料比、浸提次数、超声浸提时间、超声功率四因素对蕨菜多糖提取得率的影响。运用Design Expect 10.0软件分析,通过响应面分析法(RSM)优化提取条件,对蕨菜多糖促进小鼠脾细胞增殖能力和抑制结肠癌细胞(HTC-8)增殖能力进行分析。结果表明:蕨菜多糖的优化提取工艺为:液料比:36.2∶1;浸提次数:4次;超声浸提时间:43.1 min;超声波功率:240 W,在此条件下,蕨菜多糖提取效果最好,提取得率达8.60%。各因素对多糖提取得率的影响程度:浸提次数>液料比>超声浸提时间>超声功率。通过药理活性研究表明,本实验获得的蕨菜多糖具有脾细胞免疫增值和抑制结肠癌细胞增殖活性。     

Box-Behnken法优化苦参多糖的超声提取工艺

目的:采用响应曲面法对影响苦参多糖提取率的主要影响因素超声时间、超声功率和水料比进行优化。方法:采用超声法提取苦参多糖,以Box-Behnke响应面法优化苦参多糖的超声提取工艺条件,并进行预测分析。结果:Design Expert软件分析表明:苦参多糖提取在超声功率617.19W、超声时间22.45min、水料比27.25:1(m L:g)的最佳工艺条件下,提取率达到8.92%,实测结果与响应面拟和所得方程的预测值符合良好。结论:Box-Behnken响应面法应用于优化苦参多糖超声提取工艺是可行的,建立的数学模型和实验观察数据相符。     

响应面法优化超声辅助提取太子参多糖工艺研究

本文探讨超声波作用下太子参多糖提取的最佳工艺条件。在单因素试验基础上,采用响应面法对太子参多糖提取工艺参数进行优化研究。响应面试验表明提取温度、提取时间和水料比对响应值多糖提取得率均有显著影响,优化得到太子参多糖超声提取最佳工艺条件为:提取温度为74℃;提取时间为65 min;水料比为26 mL/g;超声波功率100 W。在此条件下太子参多糖的提取得率为2.48%,与模型预测值非常接近。     

提取防风多糖的工艺优化

采用超声波强化和微波辅助提取2种方法提取防风多糖,并与传统热水浸提法在多糖的提取率上进行比较。防风多糖超声提取的最佳工艺条件为超声功率1 000 W、提取时间25 min、液固体积质量比为25,防风多糖微波提取的最佳工艺条件为微波功率560 W、液固体积质量比为30、提取时间10 min,在最佳提取工艺下,2种方法的提取率分别为6.103%和7.639%。与传统热水浸提法相比,超声法和微波法提取防风多糖具有迅速、节能、高效、提取率高等诸多优点。     

正交试验法优化半夏多糖的提取工艺

目的:建立半夏多糖的最佳提取工艺.方法:采刚水提醇沉法,以多糖提取率为指标,通过单因素试验和正交试验,确定半夏多糖的最住提取工艺条件.结果:最佳水提条件为料液比1:30,70℃提取1h,提取3次,最佳醇沉工艺条件为醇沉浓度70%,静置时间12h.在此条件下,半夏多糖的提取率为13.68%.结论:该工艺简便,重复性好,多糖的提取率高.     

中国楤木根皮多糖超声提取工艺及含量测定

为了筛选超声提取中国楤木根皮粗多糖的工艺,以中国楤木根皮多糖得率为衡量指标,采用水提醇沉法,对中国楤木根皮粗多糖超声提取工艺中提取时间、提取温度、超声功率、料液比4个因素用正交设计法进行优化研究。结果表明:中国楤木根皮粗多糖超声提取最佳工艺为温度70℃,料液比1∶30(g/m L),提取时间80 min,超声功率100 W,此工艺下多糖得率为11.13%。该方法提取的多糖测得稳定性、重现性均良好。所得到的优化提取工艺准确可靠,保证了中国楤木根皮多糖的有效提取。     

Optimization of ultrasonic circulating extraction of polysaccharides from Asparagus officinalis using response surface methodology

Polysaccharides were extracted from Asparagus officinalis. A novel ultrasonic circulating extraction (UCE) technology was applied for the polysaccharide extraction. Three-factor-three-level Box-Behnken design was employed to optimize ultrasonic power, extraction time and the liquid-solid ratio to obtain a high polysaccharide yield. The optimal extraction conditions were as follows: ultrasonic power was 600 W, extraction time was 46 min, the liquid-solid ratio was 35 mL/g. Under these conditions, the experimental yield of polysaccharides was 3.134%, which was agreed closely to the predicted value. The average molecular weight of A. officinalis polysaccharide was about 6.18 × 10⁴ Da. The polysaccharides were composed of glucose, fucose, arabinose, galactose and rhamnose in a ratio of 2.18:1.86:1.50:0.98:1.53. Compared with hot water extraction (HWE), UCE showed time-saving, higher yield and no influence on the structure of asparagus polysaccharides. The results indicated that ultrasonic circulating extraction technology could be an effective and advisable technique for the large scale production of plant polysaccharides.     

Ultrasonic-assisted extraction of polysaccharides from Hohenbuehelia serotina by response surface methodology

An ultrasonic-assisted procedure for the extraction of polysaccharides from the fruiting body of Hohenbuehelia serotina was investigated using response surface methodology. The effects of four factors on the yield of polysaccharides were studied. The optimized conditions were extraction temperature 94°C, extraction time 3.0h, ratio of water to raw material 110:1 and ultrasonic power 480W. Under these conditions, the experimental yield of polysaccharides was 17.45±0.18%, which was well matched with the predictive yield of 17.54%. The molecular weight of polysaccharide was ranged from 1.19×10(3) to 1.55×10(4)Da. The polysaccharides were composed of ribose, arabinose, mannose, glucose and galactose in a ratio of 0.65:0.69:9.35:14.24:5.47. Then, the structural features of untreated materials, hot water extraction residue and ultrasonic-assisted extraction residue were compared by SEM. Results indicated that ultrasonic-assisted extraction technology could be an effective and advisable technique.     

绵马贯众多糖超声提取工艺优化及抗氧化活性分析

绵马贯众是中国传统常用中药,本研究以温度、时间、超声功率、液料比为影响因子,多糖得率为评价指标,通过响应面法优化超声辅助提取绵马贯众多糖的工艺条件,同时测定其基本理化性质及抗氧化活性。研究结果表明,绵马贯众多糖的最佳提取工艺条件为:温度64℃、时间60 min、超声功率210 W、液料比27 mL/g。此时多糖得率为9.57%,与预测值接近。理化性质分析表明绵马贯众多糖为含少量蛋白的酸性多糖。体外抗氧化研究表明绵马贯众多糖具有很强的DPPH自由基清除活性,IC50值为0.29 mg/mL;较好的羟基自由基清除活性,其IC50值为1.10 mg/mL;对DNA的氧化损伤有显著的保护作用。绵马贯众多糖可以作为一种潜在的抗氧化剂应用于食品和化妆品等领域。     

响应面优化塔拉种子多糖的超声波提取及其抗氧化性研究

为获得塔拉多糖超声波提取的最佳工艺,利用中心组合实验设计原理,采用四因素三水平的响应面分析法,获得多元二次线性回归方程,以多糖提取率为响应值做响应面。并考察塔拉多糖的体外抗氧化活性。结果表明：塔拉多糖的最佳提取工艺条件为,超声辅助提取超声功率363 W,超声温度56℃,超声时间23 min,料液比1：17（g·mL^-1）,塔拉粗多糖的最大提取率（25.56%）与理论推测值（25.71%）相差较小。经纯化后塔拉多糖提取率为17.82%。以VC为阳性对照,对不同纯度的塔拉多糖进行抗氧化性的研究,发现其纯度越高,对ABTS自由基的清除能力越强。     

超声参数对白术多糖抗氧化活性的影响

采用热水浸提和超声辅助法提取白术多糖,研究白术多糖的总还原能力以及对超氧阴离子(O2-·)、羟基自由基(·OH)、1,1-二苯基-2-苦苯肼自由基(DPPH·)的清除作用.结果表明:超声频率80 kHz,功率220 W时,白术多糖提取率达到最大(8.017％),明显高于热水浸提法所得(6.832％).白术多糖对·OH和DPPH·具有较强的清除作用,随着质量浓度的升高,·OH清除率呈上升趋势.超声功率和频率均对白术多糖的抗氧化活性有影响且超声功率的影响较大.随着超声功率的提高,白术多糖清除·OH的能力增强,但对O2-·的清除能力影响较弱.     

枸杞色素及多糖的不同提取次序对其得率及抗氧化活性的影响

为探究先后提取枸杞多糖及枸杞色素时对各自得率的影响。本研究通过分别考察这两种成分在提取过程中的提取溶剂、提取温度、料液比、提取次数及提取时间等因素对枸杞色素和枸杞多糖的得率影响,确定枸杞色素和枸杞多糖在提取次序不同时,两者的最佳提取工艺以及对DPPH·和·OH自由基清除率。结果表明,首先提取枸杞多糖后,枸杞色素的最佳提取工艺为采用正己烷,80℃时,料液比1∶10,提取2次,每次1 h,枸杞色素得率为2.48%,此时枸杞多糖得率为7.45%;而首先提取枸杞色素后,采用了超声辅助提取的方式提取枸杞多糖,发现超声效率为25%,料液比1∶10,提取20 min,枸杞多糖得率为5.23%,此时枸杞色素得率为3.93%。因此,首先提取枸杞多糖,使其平均得率为7.45%,而后提取枸杞色素,其平均得率为2.48%;总体上,枸杞色素1和枸杞多糖1对DPPH·自由基清除率都较高,枸杞多糖1对·OH自由基清除率较高,其抗氧化活性都接近Vc。     

有柄石韦中多糖提取工艺的优化

通过正交试验对有柄石韦中多糖提取工艺进行研究,为有柄石韦的深入开发利用提供基础材料。以多糖得率为指标,通过单因素和正交试验,对有柄石韦中多糖提取的工艺参数进行优化。超声时间、超声温度、料液比、水浴温度在多糖提取中影响因素的大小顺序为:提取时间温度料液比。有柄石韦中多糖提取最佳工艺参数组合为:超声温度40℃,提取时间60 min,料水比1∶8 g/mL,水浴时间130 min。以苯酚-硫酸法测定有柄石韦中多糖的提取率,方法可行,稳定。     

Optimization of the Cellulase−Ultrasonic Synergistic Extraction Conditions of Polysaccharides from Lenzites betulina

Lenzites betulina has been recognized as a rich source of chemical components, including polysaccharides, sterides and sugar alcohols. In this study, cellulase?ultrasonic synergistic extraction method was applied to extract polysaccharides from L. betulina, and the response surface methodology was used to optimize the extraction conditions. The eight basic factors affecting extraction yield were evaluated by Plackett?Burman design (PBD). Then, the four important factors significantly affecting the yield of polysaccharides from L. betulina, including enzymolysis temperature, enzymolysis time, ultrasound time and ultrasound temperature, were optimized by Box?Behnken design (BBD). Maximum extraction yield of L. betulina polysaccharides was 13.64±0.09 % at a cellulase dosage of 0.8 %, enzymolysis temperature of 60 °C, enzymolysis time of 180 min, pH of 4.5, liquid‐solid ratio of 45 ml/g, ultrasound power of 300 W, ultrasound time of 20 min and ultrasound temperature of 45 °C. Subsequently, the characteristic structure of crude polysaccharides was determined by FT‐IR. Results indicated that cellulase?ultrasonic synergistic treatment is suitable for L. betulina polysaccharides extraction, and it has good prospect for development and utilization.