共查询到20条相似文献,搜索用时 78 毫秒
1.
黑米种皮中花色苷组成及含量的HPLC分析 总被引:1,自引:0,他引:1
花色苷是黑米种皮中重要的活性成分,具有多种生物活性,准确分析其组成及含量对黑米的加工利用研究有重要意义。采用酸性甲醇溶液浸提黑米种皮得到粗提液,用高效液相色谱法(HPLC)通过与标准品对照,分析黑米皮中主要花色苷的组成种类及含量,旨在建立一种简便、准确的黑米种皮花色苷分析方法。研究结果表明,黑米种皮中主要含有3种花色苷组份,分别是矢车菊-3-葡萄糖苷(23.30 mg/g),矢车菊-3-芸香糖苷(0.97 mg/g),芍药定-3-葡萄糖苷(2.24 mg/g)。该方法样品前处理简单,是一种简便、准确的花色苷组成及含量的测定方法。 相似文献
2.
黑米色素的吸收光谱及色差分析研究 总被引:13,自引:0,他引:13
测定了黑米及黑米色素的吸收光谱和CIELab值。经分析,黑米中花色苷主要品种3′甲花翠素-3-0葡萄糖苷,两种黑米中花色苷含量为84.2mg/100g,284.2mg/100g,黑米色素中花色苷的含量为23.9%(以3′甲花以素-3-0葡萄糖苷计)。测定了pH值,乙醇,NaCl等对黑米色素的吸收光谱和CIELab影响较大,蔗糖的影响相对较小。 相似文献
3.
应用乙醇溶液和超声波辅助的提取方法,从大豆原粒酱油渣中提取酱油色素,并利用乙酸乙酯萃取回收乙醇提取液中的大豆异黄酮。结果表明,酱油渣中色素的最佳提取工艺为乙醇体积分数65%、料液比1∶1.75(g∶mL)、提取时间24 h、超声波时间35 min。在该条件下,酱油渣色素得率为1.8 g/100 g;高效液相色谱法分析,大豆异黄酮得率约为37 mg/100 g。光谱分析表明,酱油渣色素在紫外和红外区间均有非常强的吸收峰。色素稳定性分析表明,酱油渣色素容易被过氧化氢氧化,而亚硫酸钠对其有一定的增色作用;蔗糖、苯甲酸钠、山梨酸钾和光照对酱油渣色素的稳定性影响较小,偏酸性和80 ℃以上的高温环境对酱油渣色素具有降解作用。 相似文献
4.
5.
中国大豆核心种质异黄酮含量的分析 总被引:2,自引:1,他引:2
应用大豆核心种质库中的部分夏秋种质,分析了不同品种、省份和生态类型之间,总异黄酮含量和12种异黄酮组分含量的差异。结果表明:不同品种间总异黄酮含量差异较大,参试所有品种总异黄酮含量集中分布在1 000~4 000μg/g之间;发现了5个总异黄酮含量大于5 000μg/g的品种。将12种不同的异黄酮组分划分为4大类进行比较分析,发现不同品种间异黄酮组分含量差异显著;大豆异黄酮主成分与总异黄酮含量具有良好的正相关。比较不同省份和生态地区的总异黄酮含量和组分含量,发现不同省份之间总异黄酮含量存在显著的差异。总体来说,黄淮海区域省份内大豆的异黄酮总含量显著高于南方省份内大豆的异黄酮总含量;夏大豆类型品种的总异黄酮含量显著高于秋大豆类型品种。大豆异黄酮的主要组成成分黄豆黄素苷和染料木苷的含量在不同省份之间差异显著;黄豆黄素苷和黄豆苷在不同生态类型之间具有较为显著的差异。 相似文献
6.
以大孔吸附树脂分离纯化,冻干所得紫甘蓝色素粉末为原料,研究pH、温度、抗坏血酸、金属离子及寡糖等因素对紫甘蓝花色苷稳定性影响。结果表明,pH对紫甘蓝花色苷稳定性影响较大,花色苷含量随pH增大而下降,且当pH>7时,花色苷稳定性呈极显著降低趋势;紫甘蓝花色苷热稳定性较好,但温度>80℃时,紫甘蓝花色苷热稳定性较差;金属离子影响存在差异,Na~+、K~+对花色苷稳定性无显著性影响,Ca~(2+)对其稳定性影响显著,而Zn~(2+)、Al~(3+)影响达到极显著程度;高浓度抗坏血酸影响紫甘蓝花色苷稳定性;蔗糖对紫甘蓝花色苷表现为辅色作用,葡萄糖、乳糖、果糖等寡糖对紫甘蓝花色苷稳定性影响较小。 相似文献
7.
8.
北京地区不同大豆品种异黄酮含量比较研究 总被引:1,自引:0,他引:1
异黄酮是大豆生长过程中自然产生的化学物质,被认为可以治疗和预防一些人类依赖激素的疾病.为比较北京地区生态条件下大豆品种间异黄酮含量的差异性,对53个品种种子中3种异黄酮(大豆苷元、染料木素和黄豆黄素)进行测定和分析.结果表明,品种间异黄酮含量存在较大多样性,大豆苷元为39.21~2 363.65 μg/g,染料木素为77.35~1 149.50 μg/g,黄豆黄素为0.0~51.30μg/g,3种异黄酮总量为146.73~2 845.60 μg/g.来自山西和山东品种的异黄酮含量显著高于其他地区的品种.异黄酮总量分别与大豆苷元和染料木素呈极显著正相关,而大豆苷元和染料木素之间没有互作.因此,可以利用高含量大豆苷元或染料木素材料选育高异黄酮品种. 相似文献
9.
天然黑玉米色素研究与应用进展 总被引:2,自引:0,他引:2
黑玉米色素是从黑色玉米植株、玉米芯和玉米籽粒中提取花青苷,是一种安全、无毒天然食用色素;黑玉米色素呈有良好抗氧化活性,并具抗肿瘤、延缓衰老、降血压、调节血脂、降血糖等功能。黑玉米色素以酸性溶剂提取,其至少含有9种花色苷,主要活性物质为花青素-3-葡萄糖苷;黑玉米色素作为天然食品添加剂,可用于食品、药品、化妆品、染色剂等。该文综述黑玉米色素化学结构、理化性质、提取工艺及应用价值,对加强该色素深入研究和开发利用具有一定参考价值。 相似文献
10.
11.
《食品工业科技》2013,(01):309-311
目的:建立黑豆皮中总黄酮的含量测定方法,测定八个不同产地黑豆皮中总黄酮的含量。方法:以芦丁为对照品,采用硝酸铝显色,比色法在510nm处测定不同产地的黑豆皮中总黄酮的含量,并考察了黑豆皮中总黄酮的最佳处理方法,保证测定结果的准确性。结果:芦丁在0.003~0.057mg/mL范围内吸光度与浓度呈良好的线性关系,标准曲线回归方程为:Y=12X-0.0009(R2=0.9999),平均回收率为104.6%。不同产地黑豆皮中总黄酮的含量在6.873%~17.017%之间。结论:所用方法简便、准确,结果显示:不同产地的黑豆皮中总黄酮含量差异较大,山西和安徽的四种黑豆皮中含量较高。 相似文献
12.
《食品工业科技》2013,(07):344-349
为探寻黑豆皮花色苷(anthocyanins from black soybean seed coat,ABSC)抗禽白血病病毒A亚群(subgroup A avian leukosis virus,ALV-A)的活性效果。本文以ABSC粉为原料,采用高效液相色谱仪与质谱仪联机(HPLC-MS)的方法鉴定了其花色苷主要活性成分,随后采用体外实验,应用MTT法和观察细胞形态法检测了ABSC对鸡成纤维细胞系(DF-1)的细胞毒性,建立细胞模型,研究加入ABSC后对ALV-A的预防和治疗作用。结果表明:黑豆皮花色苷粉中含四种花色苷成分,其中主要为矢车菊色素-3-葡萄糖苷;ABSC对DF-1无细胞毒性的最大相对安全质量浓度为20μg/mL;ABSC在安全浓度范围内能抑制ALV-A的增殖,且抑制程度成剂量关系。结论,ABSC质量浓度为12μg/mL能够显著抑制ALV-A诱导的DF-1细胞形态变化,降低凋亡。 相似文献
13.
在模拟人体胃液的条件下,通过测定N-二甲基亚硝胺(NDMA)的阻断率、NO2-的形成量和清除率,研究了黑大豆种皮花色苷(BSCA)体外对亚硝化反应的抑制活性;以血清谷丙转氨酶为测定指标,通过动物试验考察了BSCA体内对亚硝胺合成的阻断作用。结果表明,BSCA能明显阻断亚硝胺的化学合成,其最大阻断率为85.9%,对亚硝酸钠具有较好的清除活性,最大清除率为70.4%;其对硝酸盐还原酶还原NO3-为NO 2-的抑制率可达53.7%。体内阻断亚硝胺合成的实验中,BSCA组血清谷丙转氨酶显著低于对照组(P<0.01)。BSCA对亚硝胺的体内外合成均具有较强的阻断作用。 相似文献
14.
Histochemical characterisation of unextractable seed coat pigments and quantification of extractable lignin in the Brassicaceae 总被引:1,自引:0,他引:1
MA Susan Marles Margaret Y Gruber 《Journal of the science of food and agriculture》2004,84(3):251-262
The differences determined by in situ histochemical staining and thioglycolic lignin analyses provided a new view of seed coat composition in a range of yellow‐ and brown‐seeded germplasm of the Brassicaceae. Unextractable seed coat pigments were composed of proanthocyanidin (condensed tannin) polymers. Anthocyanins were absent in all seed coat tissues. Proanthocyanidin was deposited over the entire seed coat in dark‐seeded germplasm and in patches in some yellow‐seeded germplasm. The seed coat and hilum of Crambe abyssinica cv Prophet and some yellow‐seeded accessions contained an unidentified, unreactive brown pigment. Several new pigmentation patterns, occurring as spots and patches and surrounding the hilum, became apparent from this analysis. Thioglycolic lignin was significantly lower in yellow‐seeded samples compared with the dark‐seeded accessions, and the majority of the lignin occurred in the seed coat. These discoveries provide new and useful data for plant breeders and indicate the need to use more detailed analytical methods in breeding programmes that have the goal of improving seed meal quality by reducing fibre and phenolics. Copyright © 2004 Society of Chemical Industry 相似文献
15.
首先通过光度分析法对大豆发芽过程中异黄酮总含量的变化、大豆中的异黄酮在子叶和芽茎中的分布进行了研究,结果表明,大豆中异黄酮总含量在芽长为3cm时达到最高。豆芽芽茎中异黄酮的总含量显著高于大豆原料和豆芽子叶。液质联用结合串联质谱的分析表明,在豆芽子叶中染料木苷和丙二酰基染料木苷为主要的组分,两者之和占豆芽子叶中大豆异黄酮总含量的63%左右;芽茎中大豆苷和丙二酰基大豆苷为主要组分,两者之和占豆芽芽茎中大豆异黄酮总含量的59%以上。豆芽芽茎中苷元的含量也明显高于豆芽子叶和大豆原料,其中大豆素含量最高,占芽茎大豆异黄酮总含量的6.71%。该研究结果表明豆芽芽茎中的大豆异黄酮具有更高的生物可利用度,比较大豆原料可能是一种更好的异黄酮食物来源。 相似文献
16.
17.
Kye Man Cho Tae Joung Ha Yong Bok Lee Woo Duck Seo Jun Young Kim Hyung Won Ryu Seong Hun Jeong Young Min Kang Jin Hwan Lee 《Journal of Functional Foods》2013,5(3):1065-1076
This research was the first to investigate nutritional components, including soluble phenolics (isoflavones and anthocyanins), protein, oil, and fatty acid as well as antioxidant activities in different coloured seed coat soybeans (yellow, black, brown, and green) for two crop years. The soluble phenolics differed significantly with cultivars, crop years, and seed coat colours, while protein, oil, and fatty acid exhibited only slight variations. Especially, malonylgenistin and cyanidin-3-O-glucoside compositions had the most remarkable variations. Green soybeans had the highest average isoflavone content (3079.42 μg/g), followed by yellow (2393.41 μg/g), and black soybeans (2373.97 μg/g), with brown soybeans showing the lowest value (1821.82 μg/g). Anthocyanins showed only in black soybeans, with the average contents of the primary anthocyanins, cyanidin-3-O-glucoside, delphinidine-3-O-glucoside, and petunidin-3-O-glucoside, quantified at 11.046, 1.971, and 0.557 mg/g, respectively. Additionally, Nogchae of green soybean and Geomjeongkong 2 of black soybean may be recommended as potential cultivars owing to the highest average isoflavone (4411.10 μg/g) and anthocyanin (21.537 mg/g) contents. The scavenging activities of 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) radicals also differed remarkably, depending upon isoflavone and anthocyanin contents, with black soybeans exhibiting the highest antioxidant effects. 相似文献
18.
天然食用决明子红色素的稳定性研究 总被引:2,自引:0,他引:2
从决明子中提取出一种天然食用红色素,pH8~9水溶液呈现鲜艳红色。用光谱法对色素稳定性进行了分析研究,决明子色素溶于大多数有机溶剂和碱性溶液;pH8水溶液在492.5nm处有最大吸收峰,色价98,(492.5nm)E1%1cm具有较好的耐热性和耐还原性;耐光性和耐氧化性差;在Cu2+、Fe3+溶液中产生棕黄色沉淀;K+、Na+、Mg2+、Ca2+、Al3+对色素无不良影响,可与食盐、蔗糖、葡萄糖、淀粉等食品添加剂并用。宜避光保存,固态为暗红色颗粒,可在室温下长期存放。 ≥ 相似文献
19.
Ying Zhang Chengfang He Yuejin Wu Jianbo Yang Hong Xuan Xuegui Zhu 《Journal of the science of food and agriculture》2009,89(11):1904-1908
BACKGROUND: Many studies have suggested that the main reason for rice bran deterioration is the effect of lipase, but there have been fewer reports about the effect of lipoxygenase (LOX) activity and red seed coat on rice bran deterioration. In this study, several rice bran materials with white or red coat and different LOX isozyme activities and near isogenic lines about the colour of coat and LOX isozymes were subjected to accelerated aging experiments, during which their fatty acid values were monitored. RESULTS: Rice bran materials with different LOX isozyme activities and colour of coat showed different changes in fatty acid value during aging. Red coat with high LOX‐1,2 and low LOX‐3 activity caused the fatty acid value to increase at a lower rate than white coat with low LOX‐1,2 and high LOX‐3 activity, while the latter caused the fatty acid value to increase at a lower rate than white coat with low LOX‐1,2,3 activity. The results for the near isogenic line further confirmed the role of LOX isozyme activity and the colour of coat in rice bran deterioration. CONCLUSION: It can be inferred that high LOX isozyme activity is beneficial to delay rice bran deterioration; for example, high LOX‐1,2 activity is essential for red rice bran storage, while high LOX‐3 activity is essential for white rice bran storage. The results of this investigation may be helpful in further studies of the mechanism of rice bran deterioration. Copyright © 2009 Society of Chemical Industry 相似文献