共查询到20条相似文献,搜索用时 187 毫秒
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《天然产物研究与开发》2015,(12)
玛咖酰胺类化合物是新资源食品玛咖中特征性活性成分,目前已报道的单体化合物数目已有三十余种,它们不具有典型的生物碱特性且极性较小。在玛咖的提取物中,玛咖酰胺类化合物的含量可达0.15%~0.97%,在玛咖生物功效中发挥着微量高效的作用。基于玛咖独特的药食两用价值,其特征性活性成分已成为国内外学者和市场广泛研究和关注的热点,但在玛咖酰胺分离提取、生物功效评价和产品深度开发等领域仍存在诸多亟待解决的问题。本文综述了玛咖酰胺的结构、提取分离方法、生物功效和商业用途,并对其进一步研究和开发进行了展望,以期对玛咖保健食品和药品的研发提供有益的借鉴和思路。 相似文献
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目的:观察玛咖及玛咖复方产品对更年期综合征患者免疫指标及维生素水平的影响。方法:80名更年期综合征受试者,随机分成复方玛咖组(40名)和玛咖组(40名),干预3个月后,比较两组之间及自身前后生化检验、血常规、lgA、lgM、血清维生素水平及体成分的变化。结果:共73名受试者完成研究(复方玛咖组37人、玛咖组36人),失访率为8.75%。干预结束后,两组之间血生化指标、血常规、血清IgA、IgM及体成分差异无显著性(P>0.05);与干预前比较,两组血清IgA均显著增高(P<0.05),其中复方玛咖组能够显著增高IgM和降低血清总胆固醇水平;复方玛咖组和玛咖组维生素B1、维生素B2、维生素B12、维生素C、维生素D较干预前均显著增高(P<0.05),其中玛咖组维生素B6较之前也显著增高(P<0.05)。结论:复方玛咖及玛咖产品均可调节更年期综合征患者免疫水平,改善其血清维生素水平,而且复方玛咖产品还能改善血清胆固醇水平。 相似文献
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玛咖提取物对小鼠毒性及免疫器官的影响 总被引:1,自引:0,他引:1
《中国实验动物学报》2016,(3)
目的探讨玛咖提取物对小鼠毒性及免疫器官的影响。方法给予BALB/c小鼠玛咖提取物15d,观察玛咖对小鼠的毒性作用,称量胸腺和脾重量。结果 24 h内小鼠口服累计剂量为320 g/(kg·bw),未见动物出现任何毒性反应。给予玛咖提取物16.0、32.0、64.0 g/(kg·bw)15 d,胸腺重量比对照组分别增加了36.84%、89.47%、107.89%,脾脏重量分别增加了44.83%、62.01%、89.66%,小鼠碳粒廓清指数分别增加了30.85%、42.55%、54.79%,血清溶血素值分别增加了11.64%、20.03%、31.51%,与对照组相比,差异有显著性(P0.05~0.01)。结论玛咖提取物具有增加免疫器官重量和提高免疫功能的作用,且毒性较低。 相似文献
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不同产地玛咖中酰胺含量分析 总被引:5,自引:0,他引:5
建立玛咖酰胺测定方法,测定不同产地玛咖切片中玛咖酰胺含量。采用HPLC法,色谱条件为Sepax Sapphire C18色谱柱(250 mm×4.6 mm,5μm)流动相:乙腈(A)-0.05%磷酸水溶液(B),梯度洗脱:0~15 min,90%~95%A;15~50 min,95%A。检测波长208 nm,体积流量1.0 m L/min,柱温30℃。酰胺1、酰胺2、酰胺3分别在0.88~132μg/m L、0.85~128μg/m L、0.96~144μg/m L线性关系良好。酰胺1、酰胺2平均回收率分别为99.21%(RSD=1.64%)、98.59%(RSD=1.75%)。不同产地玛咖中玛咖酰胺含量差别较大,建立可靠、准确、重复性好的检测方法,有利于评价不同产地玛咖的质量。 相似文献
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建立玛咖酰胺测定方法,测定不同产地玛咖切片中玛咖酰胺含量。采用HPLC法,色谱条件为Sepax Sapphire C18色谱柱(250 mm×4.6 mm,5μm)流动相:乙腈(A)-0.05%磷酸水溶液(B),梯度洗脱:0-15 min,90%-95%A;15-50 min,95%A。检测波长208 nm,体积流量1.0 m L/min,柱温30℃。酰胺1、酰胺2、酰胺3分别在0.88-132μg/m L、0.85-128μg/m L、0.96-144μg/m L线性关系良好。酰胺1、酰胺2平均回收率分别为99.21%(RSD=1.64%)、98.59%(RSD=1.75%)。不同产地玛咖中玛咖酰胺含量差别较大,建立可靠、准确、重复性好的检测方法,有利于评价不同产地玛咖的质量。 相似文献
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《天然产物研究与开发》2016,(8)
为了研究我国云南引种玛咖的醇提取物对机体更年期内分泌激素水平的影响,本文采用自然衰老大鼠模型,随机分成低、中、高剂量组,阳性和阴性对照组,经过连续经口灌胃给予玛咖醇提取物90 d,测定了大鼠体重变化,比较了各脏器系数,分析了血清内分泌激素包括雌二醇(E2)、黄体生成素(LH)、卵泡刺激素(FSH)、睾酮(T)、孕酮(P)、垂体泌乳素(PRL)的水平。结果显示该玛咖醇提取物可降低更年期大鼠的体重,各干预组的肝脏、脾脏和肾脏系数显著高于阴性对照组;同时玛咖醇提取物可显著提高更年期大鼠血清T浓度,降低LH、P浓度(P0.05);血清E_2、FSH、PRL浓度变化不显著(P0.05)。推测玛咖醇提取物可能通过作用高级中枢调节机体分泌代谢,缓解更年期综合征症状。 相似文献
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玛咖醇提物对正常小鼠免疫功能的影响 总被引:2,自引:0,他引:2
本文采用小鼠碳粒廓清、植物血凝素(PHA)诱导淋巴细胞转化,以及血清溶血素和抗体生成细胞测定等实验,研究南美植物玛咖的乙醇提取物对正常小鼠免疫功能的影响。结果表明,玛咖醇提物显著提高PHA诱导的淋巴细胞转化,促进血清溶血素生成,并增加抗体生成细胞的产生,而对单核巨噬细胞的吞噬功能无显著影响。因此,玛咖醇提取物可提高正常小鼠细胞和体液免疫功能,增强机体抵抗力。 相似文献
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独行菜属植物叶片脉序的比较观察 总被引:7,自引:0,他引:7
对独行菜属(Lepidium)8种,1变种进行了叶片脉的比较观察,结果表明:它们的一级脉中等粗细,基部1~2对侧生,一级脉与二级脉连志成拟环结两行羽状脉;三级脉贯穿型或结网型,叶缘末级脉为不完全型,网眼大小,形状不规则,发育均为不完善型,可为探讨十字花科的系统演化提供一些形态学依据。 相似文献
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宽叶独行菜的化学成分研究 总被引:2,自引:0,他引:2
对宽叶独行菜不同物候期的蛋白质、17种氨基酸进行了分析测定。同时对其不同器官中的蛋白质、氨基酸及17种矿质元素和氨基酸含量的动态规律进行了研究,讨论了其作为青饲料的开发利用前景。 相似文献
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R. L. Peterson 《American journal of botany》1982,69(6):1046-1048
Seedlings of Lepidium sativum L. (cress) were germinated and grown under ten different growth conditions to assess the effects of environment on root stelar parenchyma development. Stelar parenchyma did not undergo autolysis in any of the treatments, refuting an earlier suggestion that certain ‘prostelar’ cells (cells adjacent to primary xylem and primary phloem) are replaced by cambial derivatives. 相似文献
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Intact roots of Lepidium sativum were photographed at 1.5- to 6-min intervals before and after being tilted from a vertical to a horizontal position. Relative extension rates were calculated for segments of the root by measuring the rate of movement of charcoal particles on the surface of the root. Curvature was measured at points separated by 0.8 mm, from the tip to the root hair zone. For the first hour after the root was tilted to a horizontal position, the relative extension rate for the side of the root producing the outer side of the curve is higher than that during straight growth. The relative rate for the inner side falls to near zero during the first hour in the horizontal position. There is thus a positive gradient in extension rate from the inner to the outer side of the curve. For most of the second hour, the two sides have approximately equal relative rates of extension. In the last 12 min of the second hour, as the root tip is moving the final distance to a vertical position, the rate on the inner side shows a high extension rate. The gradient in extension rate from the inner to the outer side of the curve has thus become negative during the second hour. This reversal in the extension gradient is necessary to prevent the root from continuing to grow in a circle past the point where the root tip is vertical. Curvature reaches maximal values of 0.7 mm-1 to 1.2 mm-1 for the inner side and 0.5 mm-1 to 0.7 mm-1 for the outer side. (Units express reciprocals of the radius of curvature in mm.) Two locations where curvature is highest are separated by a flatter region. The charcoal particles marking specific locations on the root surface move away from the tip at the same rate as the features of the curvature pattern. 相似文献
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不同土壤型羊草光合和蒸腾作用特性的比较研究 总被引:27,自引:0,他引:27
不同土壤型羊草(Aneurolepidium chinense)的光合和蒸腾作用特性有所不同。当土壤由湿变干时,差异最为显著的是光饱和光合速率和最大蒸腾速率的降低率。典型栗钙土型比暗栗钙土型和盐化草甸土型羊草的光合速率下降幅度小;其蒸腾速率下降幅度比其他两种类型大。因此,典型栗钙土型羊草在土壤干旱条件下光能利用效率和水分利用效率均较高,对干旱的适应性较强。这些差异表明,在自然条件下,羊草可能存在着不同的土壤生态型 相似文献
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Beata Smolinska Agnieszka Szczodrowska Joanna Leszczynska 《International journal of phytoremediation》2017,19(8):765-773
Some investigations have been carried out in this study to find the best technique of soil reclamation in mercurypolluted soil. In this study, we examined Lepidium sativum L. as a plant useful for Hg phytoextraction. The simultaneous application of compost and thiosulfate was explored as a possible method of enhancing the process of phytoextraction. The results of the investigations of plant protein changes during assisted Hg phytoextraction were also provided. The results of the study show that combined use of compost and thiosulfate significantly increased both the total Hg accumulation and its translocation to aerial plant tissues. Plant protein analysis showed that L. sativum L. has the ability to respond to environmental stress condition by the activation of additional proteins. The additional proteins, like homocysteine methyltransferase, ribulose bisphosphate carboxylases (long and short chains), 14-3-3-like protein, and biosynthesis-related 40S ribosomal protein S15, were activated in plant shoots only in experiments carried out in Hg-polluted soil. There were no protein changes observed in plants exposed to compost and thiosulfate. It suggests that the combined use of compost and thiosulfate decreased Hg toxicity. 相似文献