heterocyclic ring

1. A chemical compound in the form of a heterocyclic ring, containing a metal ion attached by coordinate bonds to at least two nonmetal ions.
   杂环化学复合物，由一个金属离子与两个或两个以上非金属离子构成配位键。
2. Pyrimidine: Any of a class of heterocyclic compounds with a ring structure of four carbon and two nitrogen atoms.
   嘧啶：具有环状结构（由4个碳原子和2个氮原子组成）的一类杂环化合物。
3. A class of organic compounds having a five-membered heterocyclic ring with two double bonds. Synthesis of Novel Dioxo-pyrrolino [ 3 ', 4'-d] isoxazole Derivatives
   氮杂茂一种由五种杂环元素，两组粘合剂组成的有机化合物新型二氧代氮杂茂并[3′，4′-d]异恶唑衍生物的合成
4. Triazine is a type of heterocyclic organic compounds, it is important to ring nitrogen organic chemical raw materials.
   是一种三嗪类含氮杂环有机化合物，重要的氮杂环有机化工原料。
5. Determination of Degree of Opening of the Heterocyclic Ring of Imidazolinium Inhibitors at Elevated Temperatures by UV-Spectrophotometry
   紫外分光光度法测定较高温度下咪唑啉类缓蚀剂开环程度
6. Structute of nitrogen heterocyclic ring quaternary ammonium salt cationic surfactants was identi fied by mass spectrography, nuclear magnetic resonance spectra, infrared spectra and etc.
   用质谱法、核磁共振波谱法、红外光谱法等，确定了未知氮杂环季铵盐型阳离子表面活性剂的结构。
7. The Third order Nonlinear Optical Characters of Several Novel Diacetylenes Derivatives Substituted with Heterocyclic Ring
   几种新的杂环取代丁二炔类衍生物的三阶非线性光学性能
8. The results show that the pyridine heterocyclic ring comes into splitting decomposition at 770 ℃;
   结果表明：吡啶杂环在770℃时开始裂解；
9. Coupling rule of proton in drugs containing heterocyclic nitrogen ring
   药物结构中氮杂环质子的偶合现象
10. Systhesis of some systemic fungicides containing nitrogen heterocyclic ring
    含氮杂环类内吸杀菌剂的合成
11. Application of Aromatic Group and Heterocyclic Ring Substituent Thioureas in Analytical Chemistry
    芳基和杂环取代基硫脲类试剂在分析化学中的应用
12. Study on the Synthesis of Nitric Heterocyclic Ring Compound and Its Derivatives
    含氮六元杂环类化合物合成研究
13. Structural identification of nitrogen heterocyclic ring quaternary ammonium salt cationic surfactants
    氮杂环季铵盐型阳离子表面活性剂的结构鉴定
14. Heterocyclic analogs of 3-desoxyequilenin in which the D ring is replaced by a pyrazolone ring have been prepared.
    本文报道几个D环为吡唑酮替代的3-去氧-去氢雌马甾酚酮的杂环类似物的合成。
15. Aromatic heterocyclic dinitriles and their polymers ⅲ. the synthesis of some aromatic dinitriles containing benzothiazole ring
    芳杂环二腈及其聚合物Ⅲ.若干含苯并噻唑环的芳香族二腈的合成
16. Synthesis and characterization of novel soluble polyamides containing nitrogen heterocyclic ring
    新型含氮杂环可溶性聚芳酰胺的合成及表征
17. In EIMS there are many frame-rearrangement ion peaks. The cleavage of C-O, C-F. C-CF3 bonds and the formation of five-or four-membered heterocyclic ring ions containing nitrogen by losing CO are major mass spectrometric characters.
    在EIMS中，均存在较多的骨架重排离子峰，其中CO，CF，CCF3，键断裂及失去CO形成的五元，四元含氮杂环离子是重要质谱特征。
18. Syntheses and Properties of Rare Earth Elements with Tiron and Nitrogen Heterocyclic Ring
    稀土与钛铁试剂，含氮杂环三元配合物的制备和性质
19. Oxazoline, a five-membered heterocyclic ring containing both N and O coordinated atoms, is an excellent class among nitrogen-containing chiral ligands.
    其中，同时含有N和O的五元杂环的恶唑啉配体是比较优秀的一类含氮手性配体。
20. Porphyrin is a kind of organic heterocyclic compounds which contains large ring conjugate structure and possesses aromaticity.
    卟啉是一类具有大环共轭结构和芳香性的有机杂环化合物。
21. Once the heterocyclic ring was opened or cleaved, the toxicity to microorganisms could be avoided and the detoxification of wastewater was achieved.
    然而，杂环化合物中的杂环一旦破坏，则可避免其对微生物的毒性，达到脱毒的目的。
22. UV and fluorescence spectra are limited to the determination of a few protein molecules containing aromatic and heterocyclic conjugated ring system of the chromophore.
    紫外和荧光光谱只限于测定少数含有芳香族、杂环族或共轭环体系等发色团的蛋白质。
23. Nitrogen heterocyclic ring has good biological activities and important application. The derivatives of triazoles attracted more and more attention for there excellent wide range of biological activities.
    含氮杂环衍生物是一类具有良好生物活性和重要应用价值的化合物，其中三唑类杂环化合物由于具有广泛的生物活性而备受人们重视。
24. This paper designed and synthesized several chiral nitrogen-containing heterocyclic four-membered ring amide of chiral catalysts, studies its application in catalytic asymmetric Aldol reaction, and acquired better catalytic effect. 1.
    本文设计合成了几种手性氮杂四元环酰胺类手性催化剂，研究了其在催化不对称Aldol反应中的应用，取得了较好的催化效果。
25. Heterocyclic compounds are a class of compounds which contain ring structure consisting of carbon atom and oxygen, sulfur, nitrogen, and other non-carbon atoms.
    杂环化合物是由碳原子和氧，硫，氮等非碳原子构成的环状化合物。
26. Furthermore, the toxicity and potential mutagenicity of nitrogen heterocyclic compounds increased with the increase of ring number and nitrogen ( N) atom.
    含氮杂环化合物的毒性和致突变风险也随着环的数目和环内氮含量增加而增加。
27. Nitrogen-containing compounds are abundant in nature, and nitrogen heterocyclic ring exists widely in some bioactive products and medicinal compounds.
    含氮化合物广泛存在于自然界中，一些具有生物活性的天然产物、药物等往往含有氮杂环结构。
28. The effects of such the heterocyclic aryl rings effects, double six-membered ring skeleton and the position of the substituents on the optoelectronic properties of these compounds were investigated in detail.
    主要研究了取代基效应、取代基位置效应、双六元环骨架和不同芳杂环对该类二芳烯化合物的光电性质影响。

noun

1. a ring of atoms of more than one kind

   Synonym:    heterocycle