查询词典 compounds

Heterocyclic compounds contianing oxazole or thiazole moiety are also an important organic fluorescent compounds,which extensively exist in nature compounds and have superior biological activities.

含有噻唑和噁唑母体的杂环化合物广泛存在于天然化合物中，具有很好的生物活性，而且还是一类很重要的有机荧光材料，因而受到广大科学研究者的广泛关注。

In this research, two novel compounds in which alkylenedithiomethylene Malonic acid act as the main coordination agents and the compounds containing N atom (such as pyridine, Phenanthroline Ethanediamine and 4,4'-Bipyridinyl) act as the associating coordination agents have been synthesized by the means of solution and solid-liquid diffusing reactions. 9 coordination complexes and polymers have been designed and synthesized in which the transition metals Cu and Zn acted as the centre ions. These compounds have been characterized by X-ray single crystal diffraction analysis, and some properties of them have been tested and analyzed.

本论文设计合成了两种结构新颖的含有二硫缩烯酮结构的丙二酸类化合物，以此为主要配体，以含氮化合物(吡啶、邻菲罗啉、乙二胺和4，4'-联吡啶)为辅助配体，采用常规溶液合成和固-液相扩散等方法，设计合成了9个过渡金属Cu和Zn离子配合物和配位聚合物，采用单晶X-射线衍射等技术对晶体结构表征，并对其部分性质进行了测试和分析。

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。

ResultsOnly five species of Pholidota genus were studied and 41 compounds were isolated and characterized including 9,10dihydrophenanthrenes, phenanthraquinone, bibenzyls, stilbenes, triterpenoids, phenyl propanoids, lignans, sterols and aliphatic compounds, and some plants and compounds exhibited analgesic, antioxidant, anticancer and NO production inhibitory activities.

结果目前石仙桃属植物研究所涉及的种类仅5种，从该属植物中分离出化学成分41种，包括9， 10二氢菲、菲醌、联苄、二苯乙烯、三萜、苯丙素、木脂素、甾体和脂肪族等结构类型。一些种类所含成分在镇痛、抗氧化、抗癌、抑制NO生成等方面显示了较好的活性。

Results show that there is some aromaticity in the ring of pyrazole compounds, also there is some linear relationship between total energy, density and the number of amine groups respectively. Calculated detonation velocities of these compounds are more than 8.0 kms^(-1), which indicate that these compounds are very good potential energetic materials.

结果表明：吡唑环上有一定的芳香性特征；理论计算得到部分化合物的总能量和密度与NH2原子个数都有较好的线性关系；大多数化合物的爆速在8.0 kms^(-1)以上。

For the first time we synthesized nanoscale metal hydrides of lanthanum, neodymium, samarium, dysprosium, and ytterbium with high efficiency under mild condition by complexometric catalysis instead of traditional preparation at high temperature and high pressure. It is for the first time that we synthesized lanthanide organic compounds with catalysts or initiating agents at atmosphere and ambient temperature,and some of them are new compounds. Nanometric lanthanide metal powders are prepared by thermal decomposition of the compounds in vacuum. Differently from the traditional method, size of the products prepared by our method is less than 40nm, and the activity of the reaction is very high. They are pyrophoric at atmosphere. They can make some reactions without activity or low activity show extremely high activity .We investigated influent regulations of methods, conditions to scale and special surface.

我们首次成功地用络合催化等方法取代需在高温高压下进行的传统方法，在温和条件下高效率地合成出纳米尺寸镧、钕、钐、镝、镱的金属氢化物；首次在常压常温的条件下，通过催化、引发等方法合成镧系金属有机化合物，再将其真空热分解成功地制备了纳米尺寸的镧、钕、钐、镝、镱等金属粉末；与传统方法不同，这些方法得到的产品基本颗粒尺寸小于 40 nm，遇到空气燃烧，具有极高的化学反应活性，使原来活性很低甚至观察不到活性的反应大幅度提高反应速率和产率；考察了制备方法、制备条件等因素对晶粒尺寸、比表面积大小等的影响规律。

These compounds include hydrocarbons, alcohols, ketons, aldehydes, esters and ringy compounds. The major volatile compounds are alcohols, aldehydes and ketons, respectively with the contents of

这些成分包括烃类、醇类、酮类、醛类、酯类和环状化合物，其中含量较高的是醇类、醛类、酮类，在腹部肉和背部肉中分别地占挥发性化合物总数的30.47%、38.47%、13.14%和27.87%、41.54%、14.43%。

Additionally, 75 volatile chemical constituents have been identified from the petroleum ether extracted part by capillary GC-MS, and the relative percentages of them are determined by GC method. The result showed that the volatile constituents of Musella lasiocarpa mainly includes advanced alkane, aliphatic acid and ester, aldehyde, ketone, aromatic and its heterocyclic compounds. With the compounds that have been isolated and identified from Musella lasiocarpa, the biogenensis pathway of new compound MT-3 is approached. Furthermore, the bacteriostasis of the 6 compounds to Escherichia coil, Pseudomonas aerusinosa, Bacillus megaterium, Sarcina lutea and Bacillus subtilic are determined by flat dilution method.

此外，从其石油醚萃取部分用毛细管色谱法分析鉴定出75种挥发性化学成分，并测定了各组分的相对百分含量，结果表明，地涌金莲挥发性化学成分以高级烷烃、高级脂肪酸酯及醛、酮、芳香和芳香杂环化合物为主；根据从地涌金莲中鉴出和分离得到的化合物，探讨了新结构化合物MT-3的生源代谢途径；采用平板稀释法测定了地涌金莲中六种化学成分对大肠杆菌、绿脓杆菌、巨大芽孢杆菌、藤黄八叠球菌和枯草芽孢杆菌的抑菌作用。

The total of identified compounds is 102, which mainly terpene compounds and oxygenated derivatives in the compounds.the more contens are-α-Farnesene(7.62%),Valencene(7.51%),γ-Terpinene(6.56%),β-Patchoulene(5.61%), Selina-6-en-4-ol(5.57%), and so on.

结果表明，益智居群的遗传变异主要来自于居群内，7个益智居群的演化关系为：GD→WZS→QXL→MG→BC→DLS→BZL；海南益智居群中，WZS居群出现的时间较早。

The preliminary bioassay showed that all compounds had certain fungicidal and insecticidal activities. The inhibition rates of compounds 5f and 5h were above 95% against Colle-totrichum gossypii at 100 mg/L, and the mortality rates of compounds 5g and 7d were above 85% against Tetranychus urticae at 250 mg/L.

初步生物活性测定结果表明，在试验浓度下，目标化合物均具有一定的杀虫和抑菌活性，其中化合物5f和5h在100 mg/L浓度下对炭疽病菌的抑制率达95%；化合物5g和7d在250 mg/L浓度下对棉红蜘蛛的致死率达85%。

In her eyes, because that is the doorway toher heart * the place where love resides.

女人的漂亮必須從她的眼睛中去看，因為那是她心靈的窗戶和愛居住的地方

I will send some postcards to you.

我会向你发送一些明信片。