基于HPLC指纹图谱与多成分含量测定结合化学计量学的玉屏风散质量评价

建立玉屏风散HPLC指纹图谱结合化学计量学的方法对其进行分析,并测定其中11种成分的含量,为玉屏风散质量控制提供科学依据.采用Shimadzu Inertsil ODS-2 C18(250mn× 4.6 mm,5μm)色谱柱,以乙腈-水为流动性进行梯度洗脱,流速1.0 mL/min,柱温30℃,检测波长230 nm.1...     

基于HPLC指纹图谱结合化学计量学的甘草微波制与传统炮制的差异研究

分别建立生甘草、蜜炙甘草、清炒甘草及微波制甘草的HPLC指纹图谱,生甘草和蜜炙甘草均标定了17个共有峰,炒甘草和微波制甘草均标定了14个共有峰,4、5、11号峰为生甘草和蜜炙甘草的特有峰;不同炮制品相对应成分峰面积大小有所不同;混合对照品指认出的5个峰分别为:2号峰芹糖甘草苷,3号峰甘草苷,8号峰异甘草苷,10号峰甘草...     

不同产地桔梗HPLC指纹图谱及化学模式识别研究

为建立桔梗HPLC指纹图谱并对其质量控制方法进行探讨。研究采用YMC Hydrosphere C₁₈分析色谱柱(250×4.6 mm,5μm),以水和乙腈为流动相进行梯度洗脱,检测波长210 nm。建立不同产地15批桔梗药材HPLC指纹图谱。采用相似度评价、聚类分析、主成分分析和正交偏最小二乘判别分析等化学模式识别方法对不同产地桔梗质量及其控制方法进行分析和评价。建立的桔梗HPLC指纹图谱共标定21个共有峰,并通过对照品指认其中7个成分;不同产地桔梗相似度在0.927～0.991之间;聚类分析和主成分分析结果都将15批桔梗分为3类,利用正交偏最小二乘判别分析筛选出造成桔梗差异的13个色谱峰。本研究建立的HPLC指纹图谱结合化学模式识别的方法简便准确,能够为桔梗的质量控制和品质评价提供依据。     

苗药滚山珠HPLC指纹图谱及化学模式识别研究

利用HPLC指纹图谱结合化学模式识别技术对滚山珠药材进行质量评价.采用Agilent ZORBAX SB-C18色谱柱(250 mm×4.6 mm,5μm),以甲醇-0.1％乙酸水溶液为流动相梯度洗脱,检测波长254 nm,流速0.8 mL/min,进样量2 μL,柱温25℃.然后利用相似度评价、聚类分析、主成分分析和...     

紫花地丁HPLC指纹图谱研究

目的:建立紫花地丁药材HPLC指纹图谱,提供药材质量控制的可靠方法。方法:采用HPLC方法,以Agi-lent C18(4.6 mm×250 mm,5μm)为色谱柱,甲醇-0.5%醋酸水溶液进行梯度洗脱;检测波长353 nm,流速1.0mL/min。结果:检测了12批不同来源的紫花地丁药材,确立了18个共有峰,建立了紫花地丁对照指纹图谱,计算各被测样品的HPLC指纹图谱的整体相似度,并指认了菊苣苷、七叶内酯、东莨菪素、早开堇菜苷4个特征峰,比较了上述成分在不同药材中的含量。结论:所建立的指纹图谱具有良好的精密度、重现性和稳定性,可作为紫花地丁药材质量控制标准。     

化学模式识别结合HPLC指纹图谱的僵蚕质量评价研究

建立HPLC指纹图谱结合化学模式识别技术对僵蚕药材进行质量评价。采用Insertsil ODS-3(4.6 mm×250 mm,5μm)色谱柱,以乙腈-0.1%磷酸水溶液为流动相梯度洗脱,检测波长365 nm,流速0.8 mL/min,进样量10μL,柱温30℃。采用相似度评价、聚类分析、主成分分析等化学模式识别方法,对不同来源的20批僵蚕药材进行质量分析和评价。建立的指纹图谱标定了9个共有峰,指认了5个峰,1号峰为芦丁,2号峰为金丝桃苷,4号峰为紫云英苷,6号峰为槲皮素,7号峰为山奈酚,并将9个共有峰峰面积与其性状、总灰分、酸不溶性灰分、浸出物及白僵菌素含量进行相关性分析。结果表明本研究建立的僵蚕HPLC指纹图谱结合化学模式识别的方法可靠、易行,方法重复性好、专属性强,与药材性状、总灰分、浸出物及白僵菌素含量等质控指标均有一定的相关性,为后续僵蚕药材的质量控制提供依据和参考。     

钩藤UHPLC指纹图谱及化学模式识别研究

利用UHPLC指纹图谱结合化学模式识别技术对钩藤药材进行质量评价.采用ACQUITY UPLC HSS T3色谱柱(2.1 mm×100mm,1.8 μm),以乙腈-0.1％甲酸水溶液为流动相梯度洗脱,检测波长254 nm,流速0.3 mL/min,进样量2 μL,柱温30℃,采集并记录不同来源的钩藤UHPLC指纹图谱...     

青藏高原红景天药材的HPLC指纹图谱

利用高效液相色谱法建立了青藏高原红景天的色谱指纹图谱。固定相采用C28反相色谱柱,流动相为甲醇：0．1%磷酸水(v／v=15：85);检测波长220nm;流速为1．0mL／min。通过比较发现红景天样品的8个主要共有峰．可作为鉴别红景天药材的主要依据。方法简便快速。为中药品种的鉴定提供了较全面的信息。     

白屈菜药材HPLC指纹图谱研究

本文建立了白屈菜药材的HPLC指纹图谱。采用DiamonsilC 18柱 (迪马公司 )为分析柱 ,以乙腈 0 0 1MKH2 PO4 梯度洗脱为流动相 ;柱温 35℃ ;流速 1ml/min :检测波长 2 90nm。在上述条件下可以很好的分离白屈菜的各类成分 ,得到的色谱图可作为白屈菜药材专属性的指纹图谱。     

木瓜药材HPLC指纹图谱研究

以熊果酸为参照物,利用高效液相色谱（HPLC）梯度洗脱,测定了19批木瓜（Chaenomeles speciosa（Sweet） Nakai）样品。建立了药用木瓜的高效液相指纹图谱,为评价控制药用木瓜的质量提供了依据。色谱柱为YPW—Kromasil TM—C18柱（250mm×4．6mm,5μm）（美国迪马公司）;流动相：甲醇（A）一1％冰醋酸（B）,流动相A为甲醇,流动相B为1％冰醋酸水溶液。检测波长290nm,柱温30℃,流速10mL／mjn,进样量20μL。通过分析19批木瓜样品得到的高效液相指纹图谱有11个共有峰,多数峰都可以达到较好分离且19批次相似度符合。因此药用木瓜的指纹图谱特征性及专属性强,可用于药用木瓜的质量控制。     

盐胁迫对盆栽滁菊生理特性的影响

以滁菊扦插苗为材料,采用不同盐浓度进行盆栽实验,研究了在不同 NaCl 浓度(0、100、200、300、400、500 mmol·L-1)下,滁菊的形态及叶绿素含量、可溶性糖含量、脯氨酸含量、MDA 含量、叶片伤害率和根系活力等生理指标的变化情况。结果表明：叶绿素含量、根系活力随盐胁迫强度的增强而下降;可溶性糖和MDA 含量随盐胁迫强度的增强呈先升后降趋势;叶片伤害率、脯氨酸含量随盐胁迫强度的增强而增加。研究发现滁菊扦插苗能耐受较低浓度的盐胁迫,当盐浓度较高时,其生长受到较大抑制。     

Efficient,direct plant regeneration from stem segments of chrysanthemum (Chrysanthemum morifolium Ramat. cv. Royal Purple)

Direct plant regeneration was obtained from fresh chrysanthemum (Chrysanthemum morifolium Ramat. cv. Royal Purple) stem segments cultured on Murashige and Skoog's (1962) basal media supplemented with 6-benzylaminopurine (BAP, 0.5–2.0 mg/l) and -naphthaleneacetic acid (NAA, 0.2–2.0 mg/l). The morphogenetic potential varied with the developmental stage of the stem explant. The highest percentage of shoot formation (100%) and greatest average number of shoots per explant (14.6) were observed on stem segments taken from the top of the cutting. This organogenetic capacity decreases in the more mature stem. Normal, flowering plants were obtained three to four months after culture.     

亳菊花中黄酮类化合物的分离鉴定

菊花为菊科植物菊(Chrysanthemum morifolium Ramat.)的干燥头状花序,为了进一步揭示药理活性的物质基础,为该中药的开发利用和质量评价提供依据,安徽亳州亳菊花中的黄酮类化合物进行了系统研究.毫菊经醇提、萃取、硅胶柱层析与纯化得到4个黄酮类化合物.通过理化常数和波谱解析鉴定了其中3个化舍物的结构,分别为:芹菜素-7-甲醚(Apigenin-7-methyl ether)(Ⅰ)、芹菜素(Apigenin)(Ⅱ)和未犀草素(Luteolin)(Ⅲ),另外1个化合物的结构尚在鉴定中.上述3个化合物均为首次从该植物中分到的已知合物.     

Structure Elucidation of a New n-Pentyl Fructofuranoside in Dendranthema morifolium(Ramat.) Tzvel.

A new compound (1) and eleven known compounds were isolated from the polaric fractions of Dendranthema morifolium (Ramat.) Tzvel. By means of chemical and spectral analyses, compound 1 was established as n-pentyl-β-D-fruetofuranoside. Two known compounds n-butyl and ethyl eaffeate were strong antagonists of 5-]ipoxygenase.     

蒽酮—硫酸法测定菊花多糖方法的研究

研究了蒽酮-硫酸法测定菊花多糖含量时各因素对结果的影响,并对这些因素进行了优化.通过实验发现,波长为644 nm,反应温度40℃,反应时间15 min,在10.00～ 100.00 μg/mL范围内吸光度与被测物含量呈良好的线性关系,相关系数r =0.988 3,平均回收率88.95％,相对标准偏差(RSD)为8.09％.     

Polyamine metabolism,floral initiation and floral development in Chrysanthemum (Chrysanthemum morifolium Ramat.)

In the short-day plant Chrysanthemum (Chrysanthemum morifolium Ramat. variety Pavo) putrescine and spermidine conjugates appeared in the apical bud before the first observable transformation of the meristem into floral structures. These compounds accumulated on floral initiation and well before floral evocation. Spermidine conjugates were predominant during floral initiation whereas free amines did not accumulate to any significant extent. Different associations of amides were observed during floral initiation as compared with the reproductive phase. 3,4-Dimethoxyphenethylamine conjugates (water-insoluble compounds) were the predominant amine conjugates observed during flower development. These compounds decreased drastically after fertilization. In vegetative buds from plants grown in long days polyamine conjugates were very low and appeared as plants aged. We present evidence that ornithine decarboxylase (ODC) regulates putrescine biosynthesis during floral initiation and floral development. When ODC action was blocked by DFMO (-DL-difluoromethylornithine, a specific, irreversible inhibitor of ODC), flowering was inhibited, and free and conjugated polyamines were not detected. This treatment led to a slight enhancement of ADC activity. When putrescine was added, polyamine titers and flowering were restored. A similar treatment with DFMA (-DL difluoromethylarginine, a specific, irreversible inhibitor of ADC) did not affect flowering and the polyamine titers. The results suggest that ODC and polyamine conjugates are involved in regulating floral initiation in Chrysanthemum.Abbreviations ADC arginine decarboxylase - ODC ornithine decarboxylase - DFMA -DL-difluoromethylarginine - DFMO -DL-difluoromethylornithine     

Melatonin different-increasing the cryopreservation recovery rate of shoot tips of Chrysanthemum morifolium cv. Chuju by regulating the level of oxidative stress

Plant Cell, Tissue and Organ Culture (PCTOC) - Cryopreservation is vital to the preservation of genotypic diversity of plant species. In the present study, an efficient procedure for...     

Effects of Irradiance and Temperature on Flowering of Chrysanthemum morifolium Ramat. in Continuous Light

The short-day plant Chrysanthemum morifolium cv. Polaris initiatedflower buds in all irradiances of continuous light from 7.5to 120 W m^–2. As the irradiance increased, the transitionto reproductive development began earlier and the number ofleaves initiated before the flower bud was reduced. The autumn-floweringcultivars Polaris and Bright Golden Anne, and the summer-floweringGolden Stardust were also grown in continuous light at differenttemperatures; all initiated flower buds at temperatures from10 to 28 °C but only the buds of Golden Stardust developedto anthesis and then only at 10 and 16°C. Flower initiationbegan earliest at 16–22 °C, and the number of leavesformed before the flower bud was increased at 28°C. GoldenStardust was exceptional in that the number of leaves formedwas also increased at 10 °C. Axillary meristems adjacentto the terminal meristem initiated flower buds rapidly at 10°C but not at 28 °C in all three cultivars. These resultsare discussed in relation to the autonomous induction of flowerinitiation and the effects of the natural environment on floweringof chrysanthemum. Chrysanthemum morifolium Ramat, flowering, irradiance, temperature     

Photoreactions Controlling Flowering of Chrysanthemum morifolium (Ramat. and Hemfl.) Illuminated with Fluorescent Lamps

Flowering of chrysanthemum plants under short photoperiods, as is well known, is prevented when the plants are illuminated near the middle of the long night. Such illumination inhibits flowering whether it is given continuously or intermittently, and whether it comes from incandescent or from fluorescent lamps. We discovered, however, that fluorescent light applied intermittently (cyclically) throughout the entire 16-hour long night was far less inhibitory than when applied during only part of this dark period. By contrast, incandescent filament illumination is strongly inhibitory under these conditions. The cycles of fluorescent light usually lasted 15 minutes, 1.5 minutes of light followed by 13.5 minutes of dark. When such cycles were applied for only 12 hours, leaving 4 hours of uninterrupted darkness in each long night, inhibition of flowering was complete again.