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We investigated constituent of triterpenoid saponins ofAlbizzia, two new compounds together with two known compounds were isolated from Albizzia julibrissin Durazz. by using column chromatography (macroreticular resin, silica gel, Sephadex gel, reverse phase silica gel),preparative HPLC methods et al.On the basis of spectroscopic analysis, including IR,ESI-MS,~1H-NMR,~(13)C-NMR,HMBC,HMQC,~1H-~1HCOSY and chemical methods, the structure of two new compounds were identified as 3 - O -[β-D-xylopyranosyl(1→2)-β-D-fucopyranosyl (1→6)-β- D -2- deoxy - 2 - acetoamidoglucopyranosyl] -21-O-[(6S)-2- trans- 2,6-dimethyl - 6 - O-β- D - quinovopyranosyl -2,7- octadienoyl] - acacic acid- 28 - O-β-D-glucopyranosyl(1→3)[α-L-arabinofuranosyl(1→4)]-α-L-rhamnopyranosyl(1→2)-β-D-glucopyranoside acacic acid 3- O -β- D- glucopyranosy(1→3)-β- D- fucopyranosl(1→6) [β-D- xylopyranosyl (1→2)]-β-D-glucopyranoside ;two known compounds were acacic acid lactone 3- O -β-D- xylopyranosyl-(1→2)-β-D-fucopyranosl (1→6)- 2-deoxy -2 -acetoamido -β-D- glucopyranoside ; acacic acid lactone 3- O-β-D-xylopyranosyl(1→2)-α-L- arabinopyranosl (1→6)- 2- deoxy - 2- acetoamido -β-D-glucopyranoside . The study lays chemical foundation and chemical reference substance for enhancing quality standard of Albizzia julibrissin Durazz.

本研究论文在综述国内外对合欢属Albizzia三萜皂苷化学成分和药理作用研究进展的基础上,利用传统植化分离手段和现代分离技术,包括大孔树脂、硅胶、葡聚糖凝胶、反相硅胶等柱色谱,制备高效液相色谱法等技术从中药合欢皮中分离得到了4个化合物,其中,2个新化合物和2个己知化合物,并进一步通过现代分析技术IR,ESI-MS,~1H-NMR,~(13C-NMR,HMBC,HMQC,~1H-~1HCOSY等和化学方法鉴定了2个新化合物的结构分别是:3-O-[β-D-吡喃木糖基(1→2)-β-D-吡喃夫糖基(1→6)-β-D-2-去氧-2-乙酰氨基吡喃葡萄糖基]-21-O-[(6S)-2-反式-2,6-二甲基-6-O-β-D-吡喃鸡纳糖基-2,7-辛二烯酸基]-金合欢酸-28-O-α-L-呋喃阿拉伯糖基(1→4)[β-D-吡喃葡萄糖基(1→3)]-α-L-吡喃鼠李糖基(1→2)-β-D-吡喃葡萄糖苷,金合欢酸3-O-β-D-吡喃葡萄糖基(1→3)-β-D-吡喃夫糖基(1→6)[β-D-吡喃木糖基(1→2)]-β-D-吡喃葡萄糖苷;2个已知化合物结构分别是:金和欢酸内酯3-O-β-D-吡喃木糖基(1→2)-β-D-吡喃夫糖基(1→6)-β-D-2-去氧-2-乙酰氨基吡喃葡萄糖苷,金和欢酸内酯3-O-β-D-吡喃木糖基(1→2)-α-L-吡喃阿拉伯糖基(1→6)-β-D-2-去氧-2-乙酰氨基吡喃葡萄糖苷。

High-grade advanced machinery and equipment is assumed business hardware security, the people Langfang Founder Phototypesetting owned printing system, the two groups are the four American Oriental color back 48 reported high-speed offset rotary printing machine, two rotary Taipei production, the two Taiwan Strait Fort off four-color, two quarto four-color printing presses, a four-color printing octavo; Beiren producing two-color, single-, double-sided offset platforms five books, domestic laminating machine, cutting machine palpable , UV, indentation machine, as well as fine books, paperback double booking packages and other major equipment.

高档先进的机器设备是业务承担的硬件保障,廊坊人民印刷厂拥有北大方正照排系统、两组美国东方正四背四八色高速胶印轮转印报机、两台北人产轮转机、两台海德堡对开四色、两台四开四色印刷机、一台八开四色印刷机;北人产双色、单、双面平台书刊胶印机五台、国产复膜机、扪切机、UV、压痕机以及书刊精、平装双套装订机等主要机器设备。

Leaves , stems and buds of colored-leaf trees are colorful , they are white, or yellow , or red, or orange etc., some colored-leaf trees are of two kind of colors, such as golden sprinkle in green leaves, or with golden edge, or different color in two faces of a leaf , some colored-leaf trees with leaves gradual changing amang yellow ,orange , red , purple.

彩叶树种的叶片、茎、芽等色彩丰富,或银色、或黄色、或红色、或橙色……有些彩叶树种表现出复色如洒金、镶边、异色等,有些体现出黄、橙、红、紫等色彩渐变过程。

Under a fixed model of chromospheric flare, we investigate the influences of Hα and CaIIK line profilles on various velocity distributions from semiempirical view. The results show that: Hα line is very sensitive to the velocity in upper chromosphere; the profile of CaIIK line have responses to velocity in any layer of chromosphere, but the degree of CaIIK line asymmetry is much weaker than that of Hα and can be ignored if velocity is as small as 10km/s; chromospheric condensation in lower part of transition region have strong influence on Hα line but contrary to CaIIK line, the typical characteristic of H line effected by chromospheric condensation in transition region is reversed blue asymmetry, i.e. the intensity of blue peak is stronger than that of red peak; the stronger the chromosphoric condensation is, the more obvious the Hα line asymmetry appears; and so on.

在确定的大气模型下,从半经验角度系统地研究了大气各个层次的速度场和运动结构对Hα和CaⅡK谱线轮廓的影响,得到;Hα线对色球上部速度场敏感,而对色球下部和温度极小区附近速度场不敏感;CaⅡK对整个色球速度场均有反应,但不对称性较Hα弱,且速度小于10km/s时不对称性很不明显;CaⅡK受过渡区色球凝聚的影响较弱,而Hα对色球凝聚十分敏感;色球凝聚影响Hα轮廓的典型特征是呈反转结构的兰不对称性,即兰峰强于红峰;色球凝聚越强,Hα不对称性也越显著:等。

The main characteristics include: the quiet Sun corona has a rapid response to the flare heating, within 2 second the corona temperature increases nearly one order of magnitude, but later such increase becomes very slowly; the downward velocity at early stage of impulsive phase is too small to be negnected; chromospheric evaporation made by conduction shows some intensely, the maximum evaporated velocity may be as large as 1000 km/s; the chromospheric condensation appears just when the chromospheric evaporation takes place and its place always coincide with that of transition region in the early stage; the maximum of chromospheric condensation occurs also in the early stage of impulsive phase, at which the density in condensation may be larger two order of magnitude than that of surround and the downward velocity may be as large as 100 km/s; after the maximum of chromospheric condensation, its strongth decreases gradually but its width becomes greater with time and have a tendency to transport into deep chromosphere; the front of chromospheric condensation heats atmosphere obviously and the temperature in the chromospheric condensation is higher than the original case; the downware velocity of transition region may be greater than 100 km/s at the early stage; when the evaporated material collide at the top of loop, the densityand the presure there increase rapidly, which result in the formation of a shock wave; and so on.

在改善色球辐射损失和精确分辨过渡区的基础上,通过联立求解连续性方程、动量方程和能量方程,构造了一维磁限制性耀斑环在热沉积作用下的大气动力学模型,获得了耀斑热模型下脉冲相早期较为细致的大气演化理论图象,其主要特征是:耀斑对宁静日冕的加热相当迅速,仅2秒钟日冕温度增加即达一个量级,之后日冕温度增加缓慢;脉冲相早期日冕向下速度很小,几乎可以忽略,热传导驱动色球蒸发,其过程较为激烈,蒸发极大速度可达到1000km/s;色球压缩区与色球蒸发几乎同时形成,且在早期其位置总是与过渡区位置重合;色球压缩极大发生在脉冲相早期,其时密度可高于周围约2个量级,向下速度可超过100km/s;色球压缩极大后,其强度逐渐减弱,但宽度明显增大,且渐渐脱离过渡区往色球传播;压缩区内物质温度要高于原先的大气温度;过渡区下降在脉冲相早期相当迅速,可超过100km/s;当蒸发物质在环顶高速相碰时,环顶的密度、压力迅速增大,且温度也有所增加,导致形成激波,其波面以每秒上百公里的速度自环顶向下传播;在脉冲相前期,日冕软x辐射对色球的加热作用可以忽略;等。

The company has about 700 employees, the factory covers an area of about 15,000 square meters, plant area of 20,000 square meters to over the past few years development, already have a certain scale, the printing workshop of existing four-color Heidelberg presses, Mitsubishi four-color, five-color presses, Akiyama four-color printing presses, two-color Heidelberg presses, single-color machine, the entire computer paper cutter, plate-making equipment group; printed paper mounting after the workshop has a fully automatic machines, semi-automatic on the mounted machine , automatic water-based UV machine, fully automatic UV machine, polishing machine, pressure-ray machine, laminating machine, automatic rolling box machine, semi-automatic folder gluer and other equipment: fine line between many existing automatically be on the white plastic plastic machine, all-purpose adhesive on the glue machine, beer machine, cutter, sawing machine, grinding machine, gong machine, towel angle machine, tipping machine, sewing machine, angle cutter, portable drilling machine, wait until the equipment corns machine.

公司现有职工约700人,厂区占地面积约15000平方米,厂房使用面积20000平方米,以过几年来的发展,已拥有一定的规模,印刷车间现有海德堡四色印刷机,三菱四色、五色印刷机,秋山四色印刷机、海德堡双色印刷机、单色机、全电脑裁纸机、制版设备一批;印后车间拥有全自动裱纸机、半自动对裱机、全自动水性UV机、全自动UV机、上光机、压光机、覆膜机、全自动轧盒机、半自动糊盒机等设备:精品国间现有自动流水线多条,白胶上胶机、万能胶上胶机、啤机、切纸机、锯床、打磨机、锣机、巾角机、烫金机、针车、切角机、笔记本打孔机、鸡眼机等到设备。

Results: Up to date, most of the found chemical compostition of Flos Lonicerae conclude essential oil, flavonoid, organic acid, triterpenoid and microelement; The pharmacal researches show that it can antagonize pathogenic microorganism, anticatarrhals,...

结果 :至目前为止,已发现的化学成分主要有挥发油、黄酮类、有机酸、三萜类、无机元素等;药理研究表明金银花具有抗病原微生物、抗炎、解热、保肝、抗生育、止血、免疫调节、降血脂、中枢兴奋等作用;临床上主要用于多种感染、各种炎症、高热症、高脂血症、肿瘤放疗、化疗口干症等;金银花质量标准主要以其主要成分绿原酸为指标,检测方法多采用薄层色谱法和高效液相色谱法。

Compounds were identified by means of physic-chemical property and spectral data including three new compounds: platyphyllin A (1), neochlorgeniclatone (2),(2E,6Z)-2,6-dimethyl-8-O-β-D-glucosyl-2,6-octadienoic acid (3). The known compounds included cyclic diarylheptanoids, phenylic acid, ect.

从白桦叶的水提取物中,利用各种色谱分离手段(硅胶柱色谱、聚酰胺柱色谱、凝胶柱色谱及制备薄层色谱等),分离得到28个化合物,通过理化性质及各种波谱数据(NMR,MS,IR,etc)鉴定了23个化合物的结构,其中新化合物三个:platyphyllin A(1),新绿原酸内酯(neochlorgeniclatone,2),(2E,6Z)-2,6-二甲基-8-O--2,6-辛二烯酸(2E,6Z-2,6-dimethyl-8-O-β-D-glucosyl-2,6-octadienoic acid,3。

Through taken the measurements of pH, TOC, UV-Vis spectra and high-performance liquid chromatograph in the degrading process of solution ,it was found that the COD of dye solution increased, pH continuing declined and TOC reduced gradually. The UV-Vis spectra and high-performance shown that though dye molecules had been destroyed, Strong Chromophore Azo Double Bond of dye was certainly under attack, the big conjugated system was vandalized and dye molecules were decolorized degradation, but they were not completely changed into carbon dioxide and other inorganic matter by mineralization, it appeared accumulation of aromatic ring and double benzene nucleus, so it is thus evident that complete destruction of aromatic ring is more difficult than the double benzene.

通过测定直接大红染料脱色过程中的溶液pH、TOC、紫外可见光谱图和高效液相色谱图可知,在脱色处理时间(6h)范围内,染料溶液的COD值增大, pH值持续下降,TOC值逐渐降低,结合紫外可见光谱图和高效液相色谱图,说明染料分子虽然已经遭到破坏,染料分子内强生色基团偶氮双键确实遭到攻击,大的共轭体系被破坏,染料分子被脱色,却没有完全被彻底矿化成二氧化碳等无机物,出现了芳环和萘环结构的累积现象,可见完全破坏芳环比破坏偶氮双键发色团更困难。

The applications of chromatographic techniques in the fingerprint study of Chinese traditional medicine, such as gas chromatography, high performance liquid chromatography, supercritical fluid chromatography and high speed counter current chromatography are reviewed.

介绍了气相色谱、高效液相色谱、超临界流体色谱和高速逆流色谱等几种色谱技术在中药指纹图谱研究中的应用现状,以及使用模糊聚类分析和人工神经网络分析指纹图谱对中药进行模式识别和质量鉴定的方法。

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推荐网络例句

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石!

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻,也许正是在通往天国的路上,我体验着这白色的晕旋。

When you click Save, you save the file to the host′s hard disk or server, not to your own machine.

单击"保存"会将文件保存到主持人的硬盘或服务器上,而不是您自己的计算机上。