共查询到20条相似文献,搜索用时 93 毫秒
1.
2.
米渣和米糠蛋白的开发利用 总被引:2,自引:0,他引:2
大米深加工副产物中,米渣和米糠的量最大,可利用价值最高。因其含有丰富的蛋白质而具有很大潜在的经济价值。利用现代科技手段对其进行开发和合理利用既可减少浪费又可创造更多价值,为农业经济发展带来新的增长点。对米渣和米糠蛋白营养成分、提取方法、蛋白改性、开发利用进行综述,对从事此项工作人员具有很好的参考意义。 相似文献
3.
4.
5.
6.
以不同配比米蛋白组分的样品为试材,比较各样品的功能性质变化,明确各蛋白组分对蛋白产品品质影响的差异,为今后进行分子设计和重组生产米蛋白产品提供理论支撑。通过各蛋白样品的溶解性,乳化特性,起泡特性,持水性/持油性等功能性质研究,结果表明,米糠浓缩蛋白的溶解性比大米浓缩蛋白高200%左右;米糠蛋白各功能性质显著优于大米蛋白,但大米蛋白的起泡稳定性比米糠蛋白提高近20%。米蛋白中的清蛋白提高产品的溶解性、持水性/持油性,降低起泡稳定性;醇溶蛋白提高产品的乳化特性;谷蛋白提高产品的起泡稳定性。蛋白产品的功能性质与蛋白组分的组成密切相关。 相似文献
7.
8.
9.
<正>日本林原生物化学研究所发现海藻糖具有抑制大米产生米糠臭之功能。该所是利用酶以淀粉为原料直接制取海藻糖,从而确定利用海藻糖制成保鲜性优良的大米制法。由此可容易制成以前难以保鲜的大米和营养值高的胚芽米,并能进一步制成高质不淘洗米。而且,已确认海藻糖还能抑制糙米产生米糠臭,因而可期望用于糙米保存、贮藏。 相似文献
10.
为了提高大米蛋白提取的效率及质量,将一种新型的淀粉水解酶-脱枝酶引入大米蛋白的酶法提取工艺中。使用高效体积排阻色谱(HPSEC)分析相对分子质量分布表明大米淀粉经脱枝酶作用后重均相对分子质量降低明显;同时氢谱核磁共振图谱显示脱枝酶可将大米淀粉的α-1,6-糖苷键彻底水解,为糖化酶的水解提供了良好条件。将脱枝酶与糖化酶协同作用于大米制糖后的液化米渣,最终可将大分子的糊精完全水解为水溶性的寡糖从而除去,较单独使用糖化酶总糖的去除率提高39.7%。所获得大米粗蛋白的总氮质量分数达到90.58%,纯度较传统酶法提取大为提高。 相似文献
11.
米糠蛋白提取中褐变抑制剂的筛选 总被引:2,自引:0,他引:2
米糠蛋白是一种低过敏性的优质植物性蛋白,但制备过程中常伴随褐变反应的发生,导致制备出的米糠蛋白成品颜色深,限制了米糠蛋白在食品及相关领域的广泛应用。本文以米糠为原料,分别采用碱法和复合法提取米糠蛋白,在提取米糠蛋白的过程中分别加入各种不同的抑制剂,以抑制褐变反应。碱法提取米糠蛋白过程中,最佳抑制剂为1.5%的次氯酸钠,色素抑制率为64.2%,蛋白提取率为53.7%;复合法中,以3.0%的抗坏血酸、1.0%的次氯酸钠和0.15%的L-半胱氨酸为最佳复配抑制剂的情况下,提取出的米糠蛋白颜色浅,此时色素抑制率为69.87%,蛋白提取率为80.06%,褐变抑制效果显著,蛋白提取率高。 相似文献
12.
Shi‐Wen Lv Li‐Hui Sun Shu‐Yan Zhao Yong‐Ming Bao 《International Journal of Food Science & Technology》2017,52(8):1836-1843
Rice bran was stabilised by dry heat method at 120 °C for 10–60 min, and then, protein was extracted from stabilised rice bran using weak alkali method. The storage characteristics of stabilised rice bran and the influences of dry heat pretreatment on the physicochemical properties of rice bran protein isolate were also evaluated. The results indicated that dry heat pretreatment could not only prevent rancidity of rice bran effectively, but also improve some functional properties of rice bran proteins, such as emulsifying properties, oil holding capacity, and water holding capacity. However, foaming properties and protein solubility were slightly destroyed because of heating. Rice bran was pretreated at 120 °C for 10 or 20 min and then extracted at pH 9.5, and the protein yields were 50.09% and 46.98%, respectively. Therefore, the dry heat treatment at 120 °C for 10 or 20 min was a suitable alternative process in stabilisation of rice bran. 相似文献
13.
Jamuna Prakash Dr. H. S. Ramaswamy 《Critical reviews in food science and nutrition》1996,36(6):537-552
Rice bran, a good source of protein and fat, is at present underutilized as a food material. The potential of producing rice bran at the global level is 27.3 million t. The presence of enzyme lipase in rice bran causes rapid deterioration of oil to free fatty acids and glycerol. Various stabilization techniques involving heat treatment, low‐temperature storage, chemical treatment, control of relative humidity during storage, and simultaneous milling and extraction were evolved to inactivate lipase. Multiple forms of rice bran lipase have been identified. Fractional classification of proteins reveals a high percentage of albumins and globulins. Proteins can be extracted from full‐fat or defatted rice bran by alkaline extraction and acid or heat precipitation. Extraction procedures influence the protein content of concentrates, which ranged from 19.4 to 76.1% in concentrates from full‐fat rice bran and 17.5 to 85.0% in concentrates from defatted rice bran. The PER of rice bran ranges from 1.59 to 2.04 and that of protein concentrates from 1.99 to 2.19. Available lysine contents of protein concentrates ranged from 54 to 58.8%. The essential amino acid profiles of protein concentrates indicate that threonine and isoleucine are limiting amino acids. Various functional properties of rice bran protein concentrates have also been investigated that are known to be influenced by drying technique and stabilization treatment of rice bran. Rice bran has been used in food as full‐fat rice bran, defatted rice bran, and in the form of rice bran oil and protein concentrates. Full‐fat and defatted rice bran have been used in bakery products, breakfast cereals, wafers, as a protein supplement, binder ingredients for meats and sausages, and as a beverage base. Incorporation of protein concentrates have been studied in bread, beverages, confections, and weaning foods. 相似文献
14.
15.
16.
17.
米糠蛋白的分离及其营养特性的研究 总被引:2,自引:0,他引:2
米糠中含有较高的蛋白质,其必需氨基酸组成近似于人体需要量模式,本文基于此原因,主要介绍了米糠蛋白的分离方法以及营养特性,相信米糠蛋白将成为食品工业的一种新型蛋白质。 相似文献
18.
Effects of rice bran fiber on heat-induced gel prepared with pork salt-soluble meat proteins in model system 总被引:1,自引:0,他引:1
The technological effects of rice bran fiber on pork salt-soluble meat proteins in a model system were investigated. Rice bran fiber at levels of 0% (control), 0.1%, 0.5%, 1%, and 2% was added at the same time as salt-soluble meat protein to maintain similar moisture levels in all samples. Samples with increasing amounts of added rice bran fiber had higher pH, yellowness, sarcoplasmic and total protein solubilities. The moisture content, myofibrillar protein solubility and water holding capacity were the highest in the treatments containing with 1% rice bran fiber. However, the lightness and redness, textural properties decreased with increasing rice bran fiber levels. SDS gel electrophoresis did not reveal any changes in proteins regardless different rice bran fiber levels. The apparent viscosity indicated that improvements in water holding capacity and decreased texture due to added rice bran fiber. 相似文献
19.