查询词典 compounds
- 与 compounds 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Twenty compounds have been isolated and structure-elucidated, ten of which were new compounds including one new skeleton diterpene malloapeltin A, 5 cembrene-type diterpenes, two dolabradane-type diterpenoids, one triterpene ester malloapeltin B and one coumarinolignoid compound 5'-demethyl aquillochin.
其中有10个是新化合物,包括一个新骨架的二萜,五个枯烯类的二萜,两个罗柏烷型的二萜,一个三萜的对苯二甲酸酯和一个香豆素木脂体类化合物。
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The organoboron compounds in this paper are based on triarylboranes, boronic acids and boronic esters. The structure-property relationship and sensing mechanism are elucidated. Organoboron compounds as Lewis acid can be used as fluoride probe with high sensitivity and selectivity because they have a unique LUMO in which the π-conjugation is divergently extended through the vacant p-orbital of the boron atom. The complexation of the boron π-electron systems with fluoride ion would interrupt the π-conjugation extended through the boron atom, causing the change of photophysical properties.
介绍了基于三芳基硼化合物、硼酸和硼酸酯的有机硼化合物在氟离子检测中的应用,评述了这些化合物的结构和检测性能之间的关系,讨论了检测机理,即有机硼化合物中硼原子空的p轨道使其作为路易斯酸能够选择性地结合氟离子,硼原子与氟离子的结合破坏了硼中心与芳香取代基的p-π共轭,引起有机硼化合物光物理性质的变化,从而实现对氟离子的高选择性检测。
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Compounds 1, 2, 3, 4, 5and 6 were new compounds. Compound 9 was obtained from Chinese eaglewood for the first time.
其中化合物1,2,3,4, 5和6为新化合物,化合物9为首次从国产沉香中分离到的化合物。
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To develop new reactions, new compounds and new materials is always the effortful direction of chemical workers, and to obtain valuable products by using compounds which are existing, easily available and cheap is our pursuing goal all the time.
新反应、新物质和新材料的开发一直是化学工作者们努力的方向,利用现有的、易得的和低成本的原料制备出实用的化合物始终是我们追求的目标。
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It concluded:(1) the fifteen compounds, which were supposed to affect Pseudoperonospopa cubensis and Botrytis cinera of leaf cuttings of cucumber, Rhizoctonia solani of rice and Erysiphe graminis of wheat seedlinds, were tested indoors. Some of the compounds showed highly fungicidal activities.
115个系列化合物在室内分别对离体叶黄瓜霜霉病、离体叶黄瓜灰霉病、水稻纹枯病和苗期小麦白粉病的致病菌进行了化合物的普筛药效试验,其中,有些化合物显示出较高的杀菌生物活性。
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The compounds were identified by physical and spectroscopic techniques.Result:Six compounds were isolated and identified as 4,4′-biisofraxidin(1),esculetin(2),fraxetin(3),scoparone(4),isofraxidin(5),scopoletin(6),respectively.Conclusion:Compound 1 is a novel natural product.
结果:首次从草珊瑚干燥全草中分离得到6种具有抗菌活性的香豆精类化学成分,分别为4,4′-双异嗪皮啶(4,4′-biisofraxidin,1),秦皮乙素(esculetin,2),秦皮素(fraxetin,3),滨蒿内酯(scoparone,4),异嗪皮啶(isofraxidin,5),东莨菪内酯(scopoletin,6)。
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Fibrocystic disease of breast/tcm ther;compounds/ admin;compounds/ pharmacol;sex hormones/blood
纤维囊性病,乳腺/中医药疗法;复方/投药和剂量;复方/药理学;激素类/血液
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The recent progress in electroluminescence device including spiro compounds of fluorene and anthracene is discussed in this paper. The synthetic methods of double-spiro and single-spiro organic compounds together with EL devices are described in detail.
对近年来含芴、蒽螺环结构发光材料的研究进展进行了总结,重点介绍了含有双螺、单螺结构的有机电致发光材料的结构和特性,给出了部分有机化合物的合成方法。
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Three new fulvene polymeric compounds, namely 1[Ag (L3]CH2C12 , 2[Ag2(L25(H2O)(S03CF3)2]0.5C6H6 and 3 Mn(L42(C2H5OH)2 , were synthesized, respectively. Compounds 1 and 2 reported herein represent the organometallic polymers based on both Ag-N and Ag-C coordination interactions. In the solid state, compound 3 are bound together by strong intermolecular N H-O hydrogen bonding system into a supramolecular one-dimensional H-bonded chain.B.
一、富烯有机配体的合成及与金属离子的反应化学利用富烯负离子的芳酰化反应和Heck-偶联反应合成了富烯配体L1-L18,并合成了三个基于富烯配体的金属有机配位聚合物1[Ag(L3]·CH_2Cl_2、2[Ag_2(L25(H_2O)(SO_3CF_3)_2]·0.5C_6H_6和氢键驱动的超分子聚集体3Mn(L4_2(C_2H_5OH)_2。
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The primary performances of nitrogen-rich compounds on the gas generant composition of automobile crash airbag system are studies. Based on the closed bomb tests, the P—t curves are obtained and compared with NaN〓. It is shown that the burning velocity of five compounds are higher than that of NaN〓.
研究了富氮化合物作为气体发生剂使用的基础性能,采用密闭爆发器法测出了它们燃烧过程的P-t曲线,并与常用的叠氮化钠类气体发生剂的性能进行了比较,结果表明其中5种药剂的燃烧速度优于叠氮化钠。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力