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1.
高效液相色谱法测定红景天甙含量方法的研究   总被引:6,自引:0,他引:6  
王洋  张璞 《木本植物研究》2001,21(1):113-115
以高效液相色谱法作为红景山甙含量检测方法,系统探讨了用超声法从高山红景天根中提取红景天甙用以制备分析样品的方法。确定的最佳提取条件,以蒸馏水为提取溶剂在60℃超声提取40min。  相似文献   

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帕里红景天的化学成分研究   总被引:8,自引:0,他引:8  
从帕里红景天根茎的石油醚和乙醇提取部分共分得14种结晶性化合物,经光谱分析和化学反应,分别鉴定为二十二醇、二十六酸、十九醇、β-谷甾醇、二十九醇、红景天甙、麦芽糖、棉皮素-8-葡萄糖甙、胡萝卜甙、酪醇、咖啡酸、没食子酸、形花内酯和新化合物帕里甙。  相似文献   

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不同来源高山红景天材料中有效成分的HPLC分析   总被引:6,自引:0,他引:6  
本文用HPLC测定、比较了5种不同来源的高山红景天材料中有效成分—红景天甙及其甙无酪醇的含量,并建立了高山红景天有效成分分析的样品制备方法,结果表明:固体培养、液体培养及反应器培养的高山红景天组织中均含有上述两种有效成分.其中固体培养的材料中有效成分的含量最高.三种提取方法比较表明,用索氏提取器连续回流提取明显优于冷浸提取和批式回流提取.  相似文献   

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测定保健食品中红景天甙的含量以控制产品质量。采用十八烷基硅烷键合硅胶柱;以乙腈-水(1:9)为流动相,流速为1.0mL/min,检测波长为280nm。结果表明红景天甙在0.4—4.0μg范围内呈线性关系,平均回收率(n=6)为98.96%(RSD=1.16%)。该方法简便、准确、重现性好,可用于保健食品中红景天甙的质量控制。  相似文献   

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不同地区红景天植物红景天苷含量比较研究   总被引:2,自引:0,他引:2  
采用高效液相色谱法(HPLC)测定了6种不同地区红景天植物红景天苷含量.以甲醇为提取溶剂,室温超声提取45 min,HPLC测定条件:岛津C18柱(4.6×250 mm,5 μm);流动相为甲醇∶水=3∶7;柱温25℃;检测波长为275 nm.结果表明,红景天苷含量分别为:大花红景天0.36%,狭叶红景天(狮子七)0.32%,宽果红景天0.14%,白三七0.04%,在小丛红景天、洮河红景天中未检测到红景天苷.  相似文献   

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大海林地区不同生境高山红景天根部红景天甙含量的差异   总被引:1,自引:1,他引:0  
在黑龙江省大海林地区海拔1400-1620m的高山上,依据高山红景天的生境于岳桦林内、高山草甸、苔原上选择了6个样地,测定了高山红景天根部的红景天甙含量。生境不同的高山红景天,根部红景天甙的含量有明显差异,红景天甙含量范围内0.101%-0.684%。从测定结果看,光照条件好、土壤肥沃的生境下高山红景天根部的红景天甙含量较高。  相似文献   

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大海林地区不同生境高山红景天根部红景天甙含量的差异   总被引:6,自引:2,他引:4  
在黑龙江省大海林地区海拔 1 40 0~ 1 6 2 0m的高山上 ,依据高山红景天的生境于岳桦林内、高山草甸、苔原上选择了 6个样地 ,测定了高山红景天根部的红景天甙含量。生境不同的高山红景天 ,根部红景天甙的含量有明显差异 ,红景天甙含量范围为 0 .1 0 1 %~ 0 .6 84%。从测定结果看 ,光照条件好、土壤肥沃的生境下高山红景天根部的红景天甙含量较高。  相似文献   

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采用高效毛细管电泳法对采集于两个野生产地不同居群和两个人工栽培地的高山红景天中红景天甙的含量进行了对比研究 ,实验结果表明 ,该方法高效、简便、灵敏、可靠 ;人工栽培高山红景天和自然生境下高山红景天中红景天甙含量有差异 ,不同天然居群高山红景天中红景天甙含量也有差异。  相似文献   

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考察了6种真菌诱导物对高山红景天(Rhodiola sachalinensis A. Bor)细胞生长与红景天甙积累的影响。其中以黑曲霉诱导物效果最好。在细胞培养初期添加浓度为10mg(carbohydrate)/L的黑曲霉诱导物能使培养细胞中红景天甙含量提高到0.995%。前体与诱导物调控组合运用最终使红景天甙产量达到167.4mg/L,是对照培养的3.5倍。另外,对真菌诱导物的作用机理也进行了探讨,真菌诱导物添加促进红景天甙的积累应该与激活培养细胞中的苯丙烷类代谢途径有关。  相似文献   

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闫秀峰  王洋  尚辛亥 《生态学报》2003,23(5):841-849
为探讨光强及光质对高山红景天(Rhodiola sachalinensis)生物量和红景天甙含量的影响。于2000年4月至6月在东北林业大学温室内以移栽于大兴安岭加格达奇圃地人工种植生长3a的高山红景天为材料,通过纱布遮荫及遮以不同颜色的滤光膜分别进行了光强、光质控制实验(处理45d)。随着光强的降低,高山红景天全株生物量、根生物量、根的红景天甙含量和产量以及叶中叶绿素a、叶绿素b、总叶绿素的含量均有降低的趋势,但叶绿素含量变化很小,不同光强及对照之间的差异均未达到显著水平。相对光强为67.75%和44.71%的两种处理下的全株生物量、根生物量、根的红景天甙含量和产量差异不显著,它们的全株生物量和红景天甙含量与对照(全光照)的差异也不显著,但根生物量和红景天甙产量与对照的差异显著。当相对光强减弱至31.96%,全株生物量、根生物量、根的红景天甙含量和产量均大幅度下降,根冠比显著增加。4种滤光膜处理均使高山红景天的全株生物量及根生物量显著降低,蓝膜和绿膜处理的降低幅度大于红膜和黄膜处理的。红膜处理的红景天甙的含量和产量均高于对照,但黄膜、蓝膜和绿膜处理的红景天甙含量和产量则低于对照。通过计算去除4种滤光膜的光强因素,仅从光质的作用看。4种滤光膜处理仍是减小了全株生物量和根生物量,红膜和绿膜处理提高了红景天甙的含量和产量,而黄膜处理降低了红景天甙的含量和产量,蓝膜处理几乎没有效果。4种滤光膜处理均使叶绿素含量增加,但只有蓝膜处理的与对照差异显著。红膜处理不仅显著提高根中红景天甙的含量(为对照的3.42倍),而且对根生物量的影响较小(为对照的90.24%)。因而提高了高山红景天根的红景天甙产量,这意味着在生产上可能会有一定的实践意义。  相似文献   

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Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.  相似文献   

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Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.  相似文献   

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Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.  相似文献   

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正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases  相似文献   

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