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米糠是一种廉价、低利用率但营养丰富的稻米加工副产品 .米糠中的蛋白质是一种低过敏性、高生物效价的优质植物蛋白质 .从植物原料中提取蛋白质通常使用碱法提取 ,而酶法提取则能更好地保证米糠蛋白质的营养价值 .米糠蛋白质作为一种新型蛋白质资源 ,可直接用于改善食品的营养和质构 ,也可用于生物活性肽的生产 . 相似文献
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近年来对于米糠蛋白的研究越来越多,企业在追求高附加值的同时,营养学家也发现了米糠蛋白中蛋白组成的优越性。目前提取米糠蛋白的方法也比较多,碱法、酶法和物理法是目前资料报道提取米糠蛋白的主要方法。文章主要分析了碱法提取,同时简单介绍了酶法和物理法提取米糠蛋白的方法。 相似文献
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Rice bran protein has been found to be of high quality and of importance for food and pharmaceutical applications. It is a plant protein that can be derived from rice bran, an abundant and cheap agricultural byproduct. The protein content in rice bran is about 10-15% and it consists of 37% water-soluble, 31% salt-soluble, 2% alcohol-soluble, and 27% alkali-soluble storage proteins. Its unique property as being hypoallergenic and having anti-cancer activity makes it a superior cereal protein that may find a wide range of applications. There were already reports on the extraction of rice bran protein several decades ago. However, as of now, commercial rice bran protein is still unavailable in the market. This review is aimed at providing valuable discussions on rice bran protein, that is, storage protein, its various properties, and extraction methods for the development of an effective processing scheme. Also, an update on the current processing methods is also included. 相似文献
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The extractability profile of rice bran proteins under different conditions were studied to determine optimal conditions of extraction. Milling and differential sieving of rice bran increased the protein content in fine fraction by 7%. Maximum extractability of protein from defatted rice bran at pH 11.0 was 72%, out of which 70% could be precipitated at isoelectric pH 4.0. Increasing the time of extraction or using sodium chloride, sodium dodecyl sulfate or sodium hexametaphosphate were not effective in extracting more protein. The extraction and precipitation profiles of proteins from acid stabilized rice bran were comparable to untreated rice bran. However, it was very low for heat stabilized and parboiled rice bran. Denaturation of protein due to heat treatment affected the extractability of protein. Protein contents of protein concentrates obtained from untreated rice bran and acid stabilized rice bran were in the range of 71–73% whereas protein concentrates from heat stabilized rice bran and parboiled rice bran had lower protein contents of 39.5 and 54.5%, respectively. 相似文献
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Three phase partitioning (TPP) technique was used to extract oil, protein and polysaccharides simultaneously from rice bran. The fatty acid composition of rice bran oil (RBO) and structure of rice bran protein (RBP) and rice bran polysaccharides (RBPS) were analyzed. Under the optimal conditions of (NH4)2SO4 concentration 28% (w/v), slurry to t-butanol ratio 1:1.1 (v/v), pH 5.10, extraction temperature 40 °C and extraction time 1 h, the highest extraction yields of RBO, RBP and RBPS were 17.28%, 6.81% and 2.09%, respectively. The fatty acid composition of RBO was analyzed by GC, the structure of RBP was analyzed by FTIR and SDS-PAGE, and the structure of RBPS was analyzed by FTIR. The results were similar to those obtained by other methods. Therefore, TPP can be used as an effective technology for simultaneous extraction of oil, protein and polysaccharide from rice bran. 相似文献
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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
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谷维素是米糠和米糠油加工过程中极有价值副产品,具有多种生理功能。该文从谷维素组成、生理功能、米糠油皂脚组成及谷维素提取和纯化方法等方面进行综述,重点阐述谷维素提取和纯化方法研究进展。 相似文献