When chloroform was used as solvent and the concentration was 65wt%, the handedness of the two helicoidal structures was left handed ( positive Cotton effect), but when dioxane or THF was used with the same concentration, a reversed handedness was observed.

  • 以氯仿为溶剂(固定浓度为65%)时两种螺旋结构均为左旋(正Cotton效应),但二氧六环和四氢呋喃为溶剂时均变为右旋(负Cotton效应)。
  • 来源:互联网摘选更新时间:2026-07-13 05:49:25

  • 重点词汇
  • asadv. 同样地,一样地; (比较时用)像…一样,如同;(指事情以同样的方式发生)和…一样
  • reversedv.(使)反转( reverse的过去式和过去分词 );(使)颠倒;(使)翻转;推翻;
  • cottonn.棉花;棉线;棉布;
  • butconj.但是;而是;除了;只因为;
  • concentrationn.全神贯注;浓度;专注;
  • withprep. 具有;和;用;有;以;跟;同;带有;使用;和…在一起;借;与…对立;关于;包括;因为;由于;与…方向一致;由…持有;为…工作;虽然;作为…的成员,为…所雇用;具有,有,带有;在…身上,在…身边;由于,因;在…那里,在…看来
  • chloroformn.(用作麻醉剂的)氯仿,三氯甲烷;
  • solventn.[化]溶剂,溶媒;解释,说明;解决方法;使瓦解的东西;
  • left handed惯用左手的;左撇子的;用左手做的;供惯用左手者使用的;
  • AND与(计算机逻辑运算的一种,或称逻辑乘法) AND gate “与”门(电路,脉冲);
  • ofprep. 关于;属于…的;由…制成;
  • theart.这个;指已提到或易领会到的人或事物;指独一无二的、正常的或不言而喻的人或事物;用以泛指;与形容词连用,指事物或统称的人;用于姓氏的复数形式前,指家庭或夫妇;(指特定用途的事物)足够,恰好;每,一;当前的,本,此;(重读,表示所指的为知名或重要的人或事物)
  • 相关例句
1、

Chemical synthesis of conducting poly ( 3,4-ethylenedioxythiophene)( PEDT) film on the surface of anode of solid tantalum electrolytic capacitor

在钽电解电容器多孔阳极体表面化学原位被覆聚乙烯二氧噻吩(PEDT)薄膜研究

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2、

And Lumazine synthase which catalyzes the penultimate step of riboflavin biosynthesis is one of key enzymes of riboflavin biosynthesis.

2,4-二氧四氢喋啶合酶(LS)是催化核黄素生物合成途径中倒数第二步的酶,是核黄素合成的关键酶之一。

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3、

So their applications are very extensive. Poly ( 3,4-ethylenedioxythiophene)( PEDOT) because of its high light transmittance, highconductivity, excellent thermal stability, have been widespread attention.

其中,聚(3,4-乙烯二氧噻吩)(PEDOT)由于其高光透过率、高电导率和高热稳定性等优点而备受关注。

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4、

This paper introduced the synthetic process, capability and test method.

介绍了聚3,4-乙撑二氧噻吩(PEDT)的合成过程、性能及测试方法。

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5、

Study on the Synthesis of 2 Methyl 1,2,5,6 Tetra Hydrogen 5,6 Dioxo 1,2,4 Triazine 3 Thiol

2-甲基-1,2,5,6-四氢-5,6-二氧-1,2,4-三嗪-3-硫醇的合成研究

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6、

Objective: An HPLC method for the content and uniformity determination of dioxopromethazine hydrochloride in Compound Paracetamol and Zinc Gluconate Tablets was established.

目的建立用HPLC法测定复方氨酚葡锌片中盐酸二氧丙嗪的含量及含量均匀度的方法。

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7、

Synthesis of 3-benzyl-6,7-methylenedioxy-3-aza1 ( 2H, 4H) acridone and its Derivatives

3-苄基-6,7-亚甲二氧基-3-氮杂-1(2H,4H)吖啶酮及其衍生物的合成

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8、

The degradation of poly ( 3,4-ethylenedioxythiophene) ( PEDOT) films at an anode in an aqueous solution has been systemically studied.

研究了聚乙撑二氧噻吩(PEDOT)膜在水溶液中的阳极降解过程。

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9、

Synthesis and analgesic action of 6,7-methylenedioxy& 1 ( 2h, 4h)-acridone derivatives

6,7-亚甲二氧基-1(2H,4H)-吖啶酮衍生物的合成及镇痛作用

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10、

The Study of Catalytic Synthesis of 1, 4-Dioxane Using SO_4~ ( 2-)/ M_xO_y-Al_2O_3 Solid Superacid Catalyst

SO4~(2-)/M xO y固体超强酸催化合成1,4-二氧六环

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11、

In simulating the chemical shift-concentration curves of organic solvents in the binary mixtures of water with tetrahydrofuran, dioxane, acetonitrile and triethyl phosphate, the formation constants of 1:1 and 1:2 complexes were evaluated.

本文用络合平衡及快交换的方法定量描述了磷酸三乙酯(TEP)、四氢呋喃(THF)、二氧六环(DO)和乙腈(AN)水溶液中化学位移随浓度变化的曲线。

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12、

Determination of Dioxopromethazine Hydrochioride in compound paracetamol and zinc gluconate tablets by HPLC

HPLC法测定复方氨酚葡锌片中盐酸二氧丙嗪的含量

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13、

A high performance liquid chromatographic ( HPLC) method was developed for the determination of cyadox and its metabolite desoxycyadox in swine plasma, liver, kidney and muscle.

建立了测定猪血浆及肝脏、肾脏、肌肉等组织中的喹赛多及其代谢物脱二氧喹赛多的高效液相色谱(HPL C)法。

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14、

In this paper, the synthesis of3-benzyl-6.7-methylenedioxy-3-AZO-1 ( 2H. 4H) acridine and its derivatives acridinoquinoline is reported for the first time.

本文首次报道了3苄基6、7亚甲二氧基3氮杂1(2H,4H)吖啶酮的合成及其衍生物吖啶并喹啉的合成。

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15、

The condensation compound was synthesized by 2 butene 1,4 diol and iso butyric aldehyde, and was characterized by elemental analysis and IR.

将异丁醛与1,4丁烯二醇缩合得到产物二氧七环,对产物进行了元素分析和IR分析。

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16、

The influence of the substituted groups R in ligands and potassium ion in the crown ring on formation and stability of dioxygen adducts was investigated.

考察了取代基R和冠醚环配合的钾离子对二氧加合物形成及稳定性的影响。

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17、
19、

The results indicate that the MSFVWs propagating in double layer YIG structure are appropriate for high frequency range under inclined field, and they have an optimum regulating range of delay rate superior to single film by adjusting the inclination angle of magnetic field.

结果表明,斜向场情况下在双层YIG薄膜结构中传播的静磁体波适合应用于高频范围,并且通过调节磁场倾角可以获得比单层膜波导结构更好的延迟率可调范围。

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20、

The diffraction efficiency of the guided optical waves with the MSFVWs is calculated and the theoretical results are in good agreement with the experimental data in the excitation range of linear MSFVWs. This analytic procedure may be applied to the optimization design for the linear MSFVW-based Bragg cells.

计算了静磁正向体波对导波光的衍射效率,在静磁波的线性激发范围内计算结果与实验符合很好.处理方法可为线性磁光Bragg器件的优化设计提供理论指导。

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