共查询到19条相似文献,搜索用时 62 毫秒
1.
3.
芝麻饼粕蛋白提取与制备条件研究 总被引:2,自引:0,他引:2
建立了快速测定芝麻饼粕蛋白提取率的线性方程,通过响应面优化试验,获得碱提酸沉法提取芝麻饼粕蛋白的最佳工艺.改良双缩脲法快速测定饼粕蛋白提取率的方程为:Y=0.1559X+0.0012,蛋白浓度在0.75-3.78 mg/mL之间与吸光度值成良好线性.响应面优化设计试验中各因素的回归方程为:Y=196.226+16.740A+0.853B+1.783C+0.320D,即较优提取条件为pH13、液料比为25 mL/g、温度为80 ℃、时间为1 h.在该提取条件下,蛋白提取率为70.44%.酸沉的pH范围是2.5~4.5,蛋白含量为82.87%,氮的回收率为28.51%. 相似文献
4.
亚临界水是一种绿色化学反应介质,已经应用于农副产品加工。为拓展芝麻饼粕的利用途径,采用亚临界水将脱脂高温芝麻饼粕中的水不溶性蛋白与糖分别水解为水溶性小分子物质。以上清液中蛋白、多肽和氨基酸、还原糖浓度为指标,考察亚临界水温度、时间与pH对降解芝麻饼粕中蛋白与糖的影响。电泳结果显示亚临界水可以有效将因高温变性形成的高分子蛋白降解成低分子蛋白;亚临界水温度、加热时间与pH是芝麻蛋白和糖类水解的显著影响因素;选择适宜的亚临界水条件可以将原上清液中(0.08±0.01)mg/mL、(6.40±0.08)mg/mL、(1.2±0.1)μmol/L、(0.36±0.01)mg/mL的蛋白、多肽、氨基酸与还原糖浓度增加到(5.29±0.08)mg/mL、(22.28±0.05)mg/mL、(185.5±2.7)μmol/L和(4.28±0.12)mg/mL。 相似文献
5.
6.
酱油曲霉2128发酵芝麻饼粕提取抗氧化物质,并对发酵条件和抗氧化物质的活性进行了研究。结果表明发酵后提取物比芝麻木脂素的抗氧化活性有显著提高,通过试验确定酱油曲霉2128发酵芝麻饼粕的最佳工艺:接种量为3mL,发酵时间为4d,提取液甲醇水溶液浓度为70%(v/v),提取物清除DPPH达95.21%。 相似文献
7.
8.
在传统面条制作基础上,以芝麻饼粕为原料,研究芝麻饼粕面条的配方.通过单因素和正交试验确定芝麻饼粕面条的最优配方.试验结果表明:以高筋面粉质量为基准,芝麻饼粕添加量14.0%、谷朊粉添加量7.0%、食盐添加量2.0%、加水量52.0%时芝麻饼粕面条的综合品质最佳. 相似文献
9.
10.
11.
In the present study, the hydrolysis of sesame cake protein was performed by Alcalase, a bacterial protease produced by Bacillus licheniformis, to investigate the reaction kinetics of sesame cake hydrolysis and to determine decay and product inhibition effects for Alcalase. The reactions were carried out for 10 min in 0.1 L of aqueous solutions containing 10, 15, 20, 25, and 30 g protein/L at various temperature and pH values. To determine decay and product inhibition effects for Alcalase, a series of inhibition experiments were conducted with the addition of various amounts of hydrolysate. The reaction kinetics was investigated by initial rate approach. The initial reaction rates were determined from the slopes of the linear models that fitted to the experimental data. The kinetic parameters, K(m) and V(max), were estimated as 41.17 g/L and 9.24 meqv/L x min. The Lineweaver-Burk plots showed that the type of inhibition for Alcalase determined as uncompetitive, and the inhibition constant, K(i), was estimated as 38.24% (hydrolysate/substrate mixture). Practical Application: Plant proteins are increasingly being used as an alternative to proteins from animal sources to perform functional roles in food formulation. Knowledge of the kinetics of the hydrolysis reaction is essential for the optimization of enzymatic protein hydrolysis and for increasing the utilization of plant proteins in food products. Therefore, in the present study, the hydrolysis of sesame cake protein was performed by Alcalase, a bacterial protease produced by B. licheniformis, to investigate the reaction kinetics of sesame cake hydrolysis and to determine decay and product inhibition effects for Alcalase. 相似文献
12.
13.
为了探索超声波和微波技术在芝麻饼粕ACE抑制肽制备中的应用,分别以超声波和微波对芝麻饼粕预处理,超声波辅助酶解,研究了超声波功率、超声波时间、微波功率、微波时间和加酶量对ACE抑制率的影响。结果表明:超声波预处理功率为4 W/m L、预处理10 min、添加1 300 U/g碱性蛋白酶时得到的芝麻饼粕ACE抑制肽的IC50值为2.81 mg/m L。超声波辅助酶解过程中超声功率选择0.5 W/m L、添加1 700 U/g碱性蛋白酶、酶解15 min时得到的芝麻饼粕ACE抑制肽的IC50值为2.96 mg/m L。微波预处理功率为1.33W/m L、微波预处理5 min时得到的芝麻饼粕ACE抑制肽的IC50值为2.81 mg/m L。 相似文献
14.
15.
Kizhiyedathu Polachira Suja Ananthasankaran Jayalekshmy Chami Arumughan 《Journal of the science of food and agriculture》2005,85(10):1779-1783
The antioxidant activity of compounds isolated from a methanolic extract of commercial sesame cake was studied using a peroxidation model and a radical‐scavenging method. Pure compounds were isolated from the extract by preparative high‐performance liquid chromatography (HPLC) and identified and confirmed as sesamol, sesamin, sesamolin, sesaminol diglucoside and sesaminol triglucoside by HPLC, infrared, nuclear magnetic resonance and mass spectrometry. When the rate of inhibition of lipid peroxidation and the superoxide radical‐scavenging power of the individual compounds were evaluated, the compounds showed antioxidant activity to different extents. The antioxidant activity of compounds by the β‐carotene‐bleaching assay followed the order sesamol > sesamolin ≥ sesamin > butylated hydroxytoluene (BHT) > sesaminol triglucoside > sesaminol diglucoside. By the thiocyanate method the inhibition of linoleic acid peroxidation shown by sesamol, sesamin, sesamolin, sesaminol triglucoside, sesaminol diglucoside and BHT at 200 mg l?1 was 77, 60, 69, 32, 25 and 49% respectively. A concentration–dependent superoxide–scavenging effect was also shown by these compounds. Sesamolin had an appreciable effect at 300 and 500 mg l?1, while the other compounds were more effective at 100 mg l?1. The study also established the occurrence of sesamol in the methanolic extract of defatted sesame cake for the first time. Copyright © 2005 Society of Chemical Industry 相似文献
16.
17.
以微波改性蛋白和低筋粉为原料,制作富含大豆蛋白的蛋糕。实验采用单因素和正交实验对微波改性蛋白蛋糕成品进行感官评定,确定出微波改性蛋白蛋糕的最佳工艺配方。结果表明:微波改性蛋白具有良好的起泡性,可替代蛋糕制作中的部分鸡蛋。微波改性蛋白的替代率对产品感官品质的影响最大,其次是糖用量、搅打时间和疏松剂用量。微波改性蛋白蛋糕的最佳工艺条件为:微波改性蛋白替代率20%、绵白糖用量110%、搅打时间16min、疏松剂用量0.6%,以此最佳工艺条件生产的产品口感松软,风味纯正,品质优良。质构仪测定结果为硬度642.663,弹性0.883,咀嚼性0.809,咀嚼度459.367。 相似文献
18.
以湿芝麻渣和芝麻饼为原料,研究采用挤压膨化和热风干燥技术制备适宜于油脂浸出的芝麻膨化料的最佳工艺条件和可行性.考察了湿芝麻渣和芝麻饼的混合比(渣饼质量比)、膨化温度、螺旋转速对膨化结粒和脱水效果的影响,以及不同干燥条件对湿膨化料的干燥效果.试验结果表明:渣饼质量比3∶1,膨化温度180℃,螺旋转速250 r/min时,膨化结粒和脱水效果最好;干燥温度120℃,干燥时间25 rain,湿膨化料的干燥效果最好.湿芝麻渣经上述处理后成为含水量约13%、颗粒状、散落性好、适宜于油脂浸出的膨化料,该物料也是适宜储存运输且品质优良的饲料. 相似文献
19.
综述了低温制取芝麻油的工艺方法;低温萃取既能提取品质优良的芝麻油,又能得到蛋白低变性的芝麻粕,保证了芝麻油充分利用和芝麻蛋白的综合利用;低温萃取方法主要包括:低温压榨、超临界萃取、亚临界萃取及碱提法等。从低温压榨、超临界萃取、亚临界萃取三种不同生产工艺介绍芝麻油的制取及其对芝麻油和芝麻蛋白的影响。 相似文献