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从大豆豆渣中提取大豆异黄酮的初步研究 总被引:11,自引:1,他引:11
本实验以乙醇作为溶剂,以豆渣为原料,在不同提取条件和不同的豆渣预处理时,对豆渣中异黄酮的提取效果进行了研究。实验结果表明,豆渣经90℃干燥后粉碎成60目左右的颗料,在80~100%的乙醇溶液中,当温度为60—70℃温度时,回流6h,提取效果比较好。 相似文献
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应用火焰原子吸收分光光度法测定大豆豆渣中镁的含量,实验结果表明,该方法有很好的线性关系,相关系数为0.994,加标回收率为90.4%~109.5%,相对标准偏差为5.5%,该方法简便、快速、准确度高、重现性好。 相似文献
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豆渣中大豆异黄酮的超声提取研究 总被引:1,自引:1,他引:1
为了探索研究超声提取法在天然产物活性成分分离中的作用,以大豆豆渣为原料,采用超声提取法,运用单因素实验与正交实验确定最佳提取条件。结果表明,超声提取豆渣中异黄酮的最佳条件:提取剂为70%乙醇,物料比为1∶20,超声提取时间为40 min,大豆异黄酮的最高得率为0.944 mg/g。 相似文献
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火焰原子吸收分光光度法测定大豆豆渣中锌的含量 总被引:2,自引:0,他引:2
应用火焰原子吸收分光光度法测定大豆豆渣中锌的含量,标准偏差为0.0158,平均回收率为93.0%,方法简便、快速。 相似文献
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应用柱层析技术和薄层层析(TLC)法提取、分离大豆豆渣中黄酮类化合物,经紫外光谱和TLC鉴定,所获得的两种化合物分别为黄豆苷和染料木素两种异黄酮。 相似文献
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大豆牛乳酸凝乳加工工艺 总被引:1,自引:0,他引:1
以大豆、牛乳为原料,经混合乳酸菌发酵,制成一种新型酸凝乳--大豆牛乳凝乳。大豆在1%NaHCO3溶液中浸泡10-12h后,经砂轮磨磨浆,磨浆比为1:7(W/W),然后添加牛乳、砂糖和稳定剂于豆奶中,并经均质,以嗜热链球菌和保加利亚乳杆菌作为发酵刺,按1:1配合比进行发酵,保温42.5℃下发酵2.5-3h后,即可获得营养丰富,风味独特的大豆牛乳酸凝乳。 相似文献
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Dai-Yu Zhang Jun-Ru Qi Wen-Xin Jiang Jin-Song Liao Xiao-Quan Yang 《International Journal of Food Science & Technology》2021,56(10):5230-5241
In this study, pectin polysaccharide (SDPP) was obtained from soybean dreg (26.2% yield), and characteristics of SDPP were compared with those of soybean soluble polysaccharides (SSPS) and citrus pectin (HMP). The galacturonic acid and molecular weight of SSPS, SDPP or HMP were 11.8%, 40.6% or 70.2% and 112, 446, or 440 kDa. SDPP had similar viscosity and protein content to SSPS, and functional groups and linear structure to HMP. SSPS, SDPP or HMP differed in particle size of 260, 467 or 1195 nm and ζ–potential of −5.8, −14.6 or −23.5 mV at pH 4.0. The precipitation of acidified milk drink (AMD) was 6.31% without stabiliser or below 1.75% with 0.4% SDPP at pH 3.6–4.6. These results suggested that SDPP combines the structure and characteristic of HMP and SSPS, and AMD with SDPP had great stabilising behaviour at wider pH range (pH 3.6–4.6). 相似文献
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《食品工业科技》2013,(05):109-112
为开发一种新的富硒食品,本文以亚硒酸钠为硒源,以大豆为富硒载体,通过浸泡和萌发处理,实现大豆对无机硒的吸收和转化,制备富含有机硒的大豆产品。本文研究了浸泡温度、浸泡时间、浸泡液中亚硒酸钠浓度、萌发温度及萌发时间对大豆富硒作用的影响。以单因素实验为基础,然后通过正交实验对大豆富硒的最佳工艺条件进行优化,结果表明,大豆富硒的最佳工艺条件为:浸泡时间8h,浸泡温度30℃,萌发时间36h,萌发温度25℃,亚硒酸钠浓度80μg/mL。在此条件下得到富硒大豆产品总硒含量为27.31μg/g,其蛋白质中的硒含量可达31.95μg/g。本研究将为富硒食品研究开发提供基础。 相似文献
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D Ian Givens Richard Allison Bruce Cottrill Jonathon S Blake 《Journal of the science of food and agriculture》2004,84(8):811-817
Since estimated dietary selenium intake in the UK has declined steadily from around 60 µg day?1 in 1975 to 34 µg day?1 in 1997, there is a need to increase selenium intake from staple foods such as milk and milk products. An experiment was therefore done to investigate the relationship between dietary source and concentration of selenium and the selenium content of bovine milk. In a 3 × 3 factorial design, 90 mid‐lactation Holstein dairy cows were supplemented over 8 weeks with either sodium selenite (S), a chelated selenium product (Selenium Metasolate?) (C) or a selenium yeast (Sel‐Plex?) (Y) at three different dietary inclusion levels of 0.38 (L), 0.76 (M) and 1.14 (H) mg kg?1 dry matter (DM). Significant increases in milk selenium concentration were observed for all three sources with increasing inclusion level in the diet, but Y gave a much greater response (up to +65 µg l?1) than the other two sources of selenium (S and C up to +4 and +6 µg l?1 respectively). The Y source also resulted in a substantially higher apparent efficiency of transfer of selenium from diet to milk than S or C. Feeding Y at the lowest dietary concentration, and thus within the maximum level permitted under EU regulations, resulted in milk with a selenium concentration of 28 µg l?1. If the selenium concentration of milk in the UK was increased to this value, it would, at current consumption rates, provide an extra 8.7 µg selenium day?1, or 11 and 14% of daily recommended national intake for men and women respectively. Copyright © 2004 Society of Chemical Industry 相似文献
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以豆渣为原料制取二水合草酸,研究了硫酸质量分数、干豆渣浸泡时间、硝酸用量、反应时间、反应温度及催化剂五氧化二矾-三氯化铁(质量比1∶1)用量对草酸收率的影响,并对产品进行了质量测定。结果表明,豆渣制取草酸的最佳工艺条件为:硫酸质量分数70%,干豆渣浸泡时间3 h,硝酸、干豆渣、催化剂质量比2. 1∶1∶0. 002,反应时间5~6 h,反应温度65~70℃。在最佳工艺条件下,采用母液套用的方法连续操作9批物料,二水合草酸收率平均可达76. 5%,纯度99. 5%。产品经红外光谱确定为草酸,熔点101. 5℃,铁盐和硫酸盐含量分别为0. 002%和0. 04%,850℃灼烧残渣为0. 07%。 相似文献
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改性大豆分离蛋白生产中性豆奶的研究 总被引:2,自引:1,他引:1
对豆奶加工中关键工艺参数(稳定剂配方、杀菌和均质)进行筛选,最终确定了以改性大豆分离蛋白为原料的调配型中性豆奶的基本配方和工艺参数。按此方法所生产的豆奶能保持稳定的组织状态,3个月以上不出现上浮和下浮现象,其主要指标均符合国家标准。 相似文献
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