共查询到19条相似文献,搜索用时 93 毫秒
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本文研究了葵花籽蛋白脱色工艺优化及其功能特性的研究,旨在制备出颜色和功能特性都较好的葵花籽蛋白。以低温脱脂的葵花籽粕为原料,采用单因素实验及正交实验分析研究限制性酶解后再结合大孔树脂吸附对葵花籽蛋白脱色效果的影响,进一步研究限制性酶解结合大孔树脂吸附处理对葵花籽蛋白得率、蛋白含量及功能特性的影响。结果表明:葵花籽蛋白的最佳脱色工艺条件为酶解温度55 ℃、酶解pH 6.0、酶解时间10 min、酶添加量0.8%。在此条件下葵花籽蛋白的L*值为84.5、a*值2.7、b*值12.6,颜色由深灰色变为浅白色,脱色效果显著。限制性酶解结合大孔树脂吸附脱色后葵花籽蛋白质含量和得率分别由90.76%和5.96%提高至97.65%和8.22%,溶解性、乳化性、乳化稳定性、起泡性和持水性都显著提高(P<0.05)。 相似文献
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一步法花生浓缩蛋白制备工艺的研究 总被引:3,自引:2,他引:3
对一步法制备花生浓缩蛋白新工艺进行了研究,并获得了最佳工艺条件。实验结果表明:采用该工艺制得产品的蛋白质含量达70%以上,产品的品质及功能特性俱佳,尤其是其溶解性好,NSI值高达80%以上。 相似文献
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花生粉,花生浓缩蛋白制备工艺及功能特性的研究 总被引:6,自引:3,他引:6
对花生蛋白,特别是花生浓缩蛋白的制备工艺进行了研究。对浓缩蛋白的三种制备方法进行了分析比较,并将产品的功能特性与大豆浓缩蛋白进行了对照。 相似文献
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为了改善葵花籽蛋白的功能特性,以未处理的葵花籽蛋白作为对照,研究了超声波(100、300、500 W和700 W,30 min)处理对葵花籽蛋白功能特性的影响。结果发现,与未处理的葵花籽蛋白相比,超声波处理后,当超声功率为700 W时葵花籽蛋白的溶解性、乳化性和起泡性分别提高了21.18%、1.87 m2/g和11.03%;超声功率为500 W时泡沫稳定性和持油性分别提高了9.94%和4.27 g/g;乳化稳定性和持水性分别下降了36.59 min和0.87 g/g。综上所述,超声波处理可以较好地改善葵花籽蛋白的功能特性,这也为超声波处理改善其他蛋白质功能特性提供了理论依据。 相似文献
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向日葵是现在增长速度最快的一种大面积种植油料作物,它已经成为世界上食用油的第二大来源,饲料蛋白的第四大来源,并有可能在世界食用蛋白质的供应方面发挥重大作用。 相似文献
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利用米糟制备食用大米浓缩蛋白 总被引:2,自引:0,他引:2
在对米糟一般化学成分的含量与特性进行分析的基础上,采用已烷抽提脱脂、热水洗涤除糖等方法,制备食用大米浓缩蛋白。原料中蛋白质回收率达94.6%,产品中蛋白质含量达72.5%。 相似文献
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以低温脱脂葵花籽饼为原料,通过超声波辅助大孔树脂处理方法提取浅色的葵花籽蛋白。以L*值作为指标,采用单因素正交实验来优化最佳工艺条件。在此基础上,研究了该处理方法对葵花籽蛋白得率和功能特性的影响。结果表明:制备浅色葵花籽蛋白的最佳工艺条件为料液比1∶20 g/mL、超声功率200 W、超声时间25 min和树脂添加量10%。在此条件下葵花籽蛋白的L*值高达82.87。与未处理的葵花籽蛋白相比提高了32.79%;超声波辅助大孔树脂吸附处理后葵花籽蛋白的得率、溶解性、乳化性、乳化稳定性、起泡性和持水性均显著改善(P<0.05),分别提高了33.27%、19.04%、0.95 m2/g、0.73 min、6.04%、0.65 g/g。综上所述,超声波辅助大孔树脂处理可以改善葵花籽蛋白的色泽和功能特性。 相似文献
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ABSTRACT: Defatted flour, protein concentrate, and protein isolate obtained from Amazonian cupuassu seeds were evaluated for their solubility properties, water and oil retention capacity, foam formation and stability, gelling properties, emulsifying ability, and emulsion stability. The protein contents of defatted flour, the concentrate, and the isolate were 27.65%, 31.18%, and 64.29%, respectively. As expected, the protein isolate exhibited higher solubility than the protein concentrate, achieving more than 90% solubility at pH 8.0. The flour and the protein concentrate, however, showed excellent water and oil retention capacities. High emulsifying capacity at pH 7.0 was also observed for all 3 products: 987 mL oil/g, 977 mL oil/g, and 1380 mL oil/g for the flour, protein concentrate, and protein isolate, respectively. Gelling properties were not exhibited by any of the products, but all of them exhibited good utilization potential, not only to enrich other foods but also to enhance relevant functional properties. 相似文献
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紫苏分离蛋白功能性研究 总被引:3,自引:0,他引:3
为了开发紫苏蛋白在食品工业中的应用,以大豆分离蛋白为对照,研究紫苏分离蛋白的功能特性。结果表明:紫苏分离蛋白的溶解性与大豆分离蛋白的溶解性随pH值变化的趋势基本一致,但在等电点时紫苏分离蛋白的溶解性高于大豆分离蛋白。在pH7.0时,紫苏分离蛋白的持水性、起泡性及泡沫稳定性、乳化性和凝胶性均不及大豆分离蛋白。但紫苏分离蛋白的吸油性仅稍小于大豆分离蛋白,此外,在紫苏分离蛋白的蛋白质质量浓度为3g/100mL以后,其乳化稳定性与大豆分离蛋白的乳化稳定性基本相当。紫苏分离蛋白在食品加工中作为一种蛋白质强化剂具有一定潜力。 相似文献
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H.E. Martínez-Flores E.S. Barrera M.G. Garnica-Romo C.J.C. Penagos J.P. Saavedra R. Macazaga-Alvarez 《Journal of food science》2006,71(8):C495-C498
ABSTRACT: Food preferences by human beings are based on sensory attributes such as texture, flavor, color, and appearance that depend mainly on the interactions between minor and major components of the food. Some functional properties depend directly on the proteins, such as oil and water absorptions, foam and emulsion activities, and viscosity. The objective of this work was to obtain and evaluate the functional properties of flaxseed protein concentrate. Flaxseed was ground, defatted, and sieved to eliminate hull fiber. Surface response methodology with 5 central points and 4 axial points was used to determine how to obtain the highest protein concentrate. The independent variables used were solubilization pH (which varied from 9 to 11) and precipitation pH (which varied from 4.2 to 4.8). Treatment with a solubilization pH of 11 and a pH extraction of 4.8 gave 66.03% protein content. The flaxseed protein concentrate contained 2.56% fat, 6.62% ash, 2.44% insoluble fiber, 15.79% soluble fiber, and 6.59% sugars. The product had oil and water absorption capacities of 150.25% and 253.5%, respectively. Better foam stability (83.33%), emulsifying capacity (84.76 mL/g), and emulsifying activity (88.37%) of the flaxseed protein concentrate were observed at a pH 6. In light of its functional properties as indicated by this study, flaxseed protein concentrate may be recommended for use as an ingredient in products such as meat batters, hamburgers, and ice cream. 相似文献