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- An atom other than carbon in the structure of a heterocyclic compound. 杂环原子杂环化合物结构中的除了碳之外的原子
- "Heme, a complex heterocyclic compound, is an organic molecule derived from porphyrin with an iron atom at the centre. 血红素（一种复杂的杂环化合物）是来自中心含铁原子的的一种有机分子。
- A six-membered heterocyclic compound, such as pyridine, that contains one or more atoms of nitrogen with a ring structure resembling that of benzene. 吖?，连氮由六种元素构成的杂环化合物，如氮苯（吡啶），它由一个或更多的氮原子构成，呈环状结构，类似苯的结构
- By Hull cell test, a kind of anion surfactant and nitrogen heterocyclic compound was chosen as a additive for pulse non-cyanide silver electroplating. 采用赫尔槽试验筛选出一种阴离子表面活性剂及含氮杂环化合物作为脉冲无氰镀银的添加剂,并初步确定了无氰镀银的工艺条件及脉冲条件。
- Hexahydroxy N-containing heterocyclic compound without sulfur and phosphorus was synthesized and its structure was characterized. 合成了无硫、磷的六元含氮杂环化合物添加剂。
- A six - membered heterocyclic compound,such as pyridine,that contains one or more atoms of nitrogen with a ring structure resembling that of benzene. 吖?，连氮由六种元素构成的杂环化合物，如氮苯(吡啶)，它由一个或更多的氮原子构成，呈环状结构，类似苯的结构
- Robert C. Elderfield. Heterocyclic Compounds [M]. 1952.Volume 4. 502-503. 花文廷.;杂环化合物[M]
- The pyrazoles ramification containing dithioether is synthesized by one-step method and characterized by H-NMR, IR and UV-Vis spectra. The heterocyclic compound can be applied in the field of pesticide. 摘要本文通过对反应的优化，采用一步法合成出含有连二醚的吡唑衍生物。并采用氢核磁共振，红外光谱和紫外吸收光谱等手段进行了表征。这类化合物有可能应用于农药领域。
- The research direction and main operation includes four parts: Medicine material and chiral compound, organic acid and its ramification, heterocyclic compound and customizes products. 研究方向和主营业务分为四部分：一、医药原料药及手性中间体二、有机酸及其衍生物三、杂环化合物四、定制产品。
- Carbazole, a kind of nitro heterocyclic compound, was the main constituted part of the coal tar fraction.There was about 15% of the carbazoles contained in the high temperature coal tar. 摘要咔唑是一种含氮的杂环化合物，是煤焦油馏分中重要的组成部分，高温煤焦油内约含咔唑1.;5%25。
- The chemical behaviour of heterocyclic compounds is governed by the same factors that govern all chemical behaviour. 杂环化合物的各种反应与其它化学反应一样，均为相同的因素所制约。
- We have, therefore, in both of the examples above, heterocyclic compounds with "built-in" or latent functionality. 上述两例中的杂环化合物，都具有“固有的”或潜在的官能基。
- Purine: Any of a class of heterocyclic compounds with a two-ring structure composed of carbon and nitrogen atoms. 嘌呤:嘌呤是对由碳、氮原子组成的双环结构的杂环化合物的统称。
- We have, therefore, in both of the examples above, heterocyclic compounds with " built-in " or latent functionality. 上述两例中的杂环化合物，都具有“固有的”或潜在的官能基。
- Abstract Heterocyclic compounds generally possess important biological and chemical activities. 摘 要 杂环化合物一般都具有重要的生理活性。
- Any of a class of heterocyclic compounds based on the parent structure, uric acid, and used in medicine. 任何一种以母体结构和尿酸为基础的杂环化合物，用于医药方面。
- Most researches focused on fulgide, diarylethene, spiropyran, spiroxaxine and other related heterocyclic compounds. 有机光致变色化合物的研究大都集中在俘精酸酐、二芳基乙烯、螺吡喃、螺恶嗪以及相关的杂环化合物上，同时也在继续探索和发现新的光致变色体系。
- The results show that the high specificity and sensitivitiy of the GC-AED make it advantageous in analyses for these heterocyclic compounds. 结果表明该技术对有机含硫化合物的分析与检测，具有高的灵敏度和强的选择性，对原油中的含硫化合物能有效地分离和鉴定。
- Tetronic acid, tetronic amine and their derivatives are five-membered heterocyclic compounds along with bio- and pharmacological activities. 特窗酸、特窗胺及其衍生物均是生物活性很高的五员杂环化合物，具有重要的研究与实用价值。
- Pyrazole agrochemicals are important heterocyclic compounds, widely used as herbicides, insecticides/ acaricide, fungicides and etc. 吡唑类农药是一类重要的杂环类化合物,广泛用于除草、杀虫/杀螨和杀菌等多个领域。
