Heterocyclic compounds with nitrogen heteroatom (s) only.
仅含有氮杂原子的杂环化合物。
The bases and pentoses of the common nucleotides are heterocyclic compounds.
常见核苷酸中的碱基和戊糖是杂环化合物。
New heterocyclic compounds, preparing method, pharmaceutical composition and use.
杂环化合物，制备方法，药物组合物和用途。
A simple method of preparation of phosphonic heterocyclic compounds has been found.
发现了一种简便制备邻位含吸电子取代基的膦酰基杂环化合物的方法。
From the structural point of view, thiophene is a heterocyclic compounds, but also a thioether.
从结构式上看，噻吩是一种杂环化合物，也是一种硫醚。
The treatment of deleterious heterocyclic compounds in industrial waste water is an important field.
工业废水中有毒杂环化合物的处理是一个具有重大实用价值的研究课题。
Nitrogen- and oxygen-containing heterocyclic compounds are crucial moieties in a wide range of drug leads.
氮、氧杂环化合物是一类非常重要的杂环分子，大多具有生物和药理活性。
This article reviews the ring opening reaction of five membered nitrogen containing heterocyclic compounds.
综述了近年来各种五元氮杂环的开环反应及其在有机合成中的应用。
Therefore, sulfur participation is an important means for building heterocyclic compounds in organic synthesis.
近年来也有很多的研究工作者通过硫参与的方法合成了很多的杂环化合物。
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。
This paper describes the applications and the synthetic method of heterocyclic compounds Imidazolidone and Imidazolethione.
介绍了杂环化合物咪唑酮和咪唑硫酮类化合物的应用及合成方法。
Studying the synthesis of heterocyclic compounds and the biologic activity is one of the most spirited items in organic chemistry.
探索杂环化合物的合成及生物活性是有机化学中最具生命力的研究课题之一。
Due to the excellent two-photon nature of the high optical stability, the heterocyclic compounds thus become the focus of the study.
杂环化合物由于具有优良的双光子性质，高的光学稳定性，因而成为研究的重点。
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。
Heterocyclic compounds are the common organic pollutants in industrial wastewaters, such as coking plants, printing and (dyeing) plants, pesticide plants and so on.
杂环化合物是焦化、印染、农药等工业废水中常见的有机污染物，是造成这类废水难生物降解的主要原因。
Expounded in this article is divided into three chapters, which are summarized as follows:1. Epoxide and its derivatives are important triatomic heterocyclic compounds.
本文共分三章进行论述，其摘要如下：1。环氧化合物是一种重要的含氧三元杂环化合物。
Spiro-heterocyclic compounds are important branch of heterocyclic compounds, and play an important role on today's research and development of pesticides and medicines.
螺杂环化合物是杂环化合物的一大重要分支，在当今农药和医药的研究与开发中都占据着重要的地位。
In recent years synthetic work on fused heterocyclic compounds and study of theirs biological activities were a hot topic in the field of study on heterocyclic chemistry.
近年来稠杂环的合成及其生物活性的研究日益成为杂环化学研究的热门课题。
In this thesis, a series of novel heterocyclic compounds involving in more complex structures and in part original nucleus were synthesized based on domino reactions and MCRs.
本论文系统地研究了利用串联反应与多组分反应合成一系列结构较为复杂、新颖，部分为原创性母核的杂环化合物。
Chlorosulfonyl isocyanate as an important intermediate was applied toward the syntheses of four to seven member heterocyclic compounds containing oxygen, nitrogen, sulfur atoms.
氯磺酰异氰酸酯可用于合成含氧、氮、硫等原子的四至七元杂环化合物。
The applications of a new solvent 1,3-dimethyl-2-imidazolidinone in organic synthesis, such as in synthesis of high polymers, heterocyclic compounds, organometalloidal compounds etc.
综述了新溶剂1 ，3-二甲基- 2 -咪唑啉酮在有机合成中的应用，如高分子聚合物、杂环化合物和有机金属化合物等的合成。
The results showed that the volatile constituents of Rhododendron athopogoides Maxim, mainly includes aliphatic acid and ester, aldehyde, ketone, aromatic and its heterocyclic compounds.
结果表明：烈香杜鹃精油化学成分以高级脂肪酸酯、酮、芳香族化合物及芳香杂环化合物为主。
Nitrogenous heterocyclic compounds exist in many kinds of industrial wastewaters and municipal wastewaters. Anxic denitrification is an important biological treatment process for wastewaters.
含氮杂环化合物存在于多种工业废水和城市污水中，而缺氧反硝化是一种重要的生物处理手段。
The results showed that there were 36 to 131 sorts of benzene and its derivatives, heterocyclic compounds, and polycyclic compounds being detected. Most of them have harmful effect on human health.
分析结果表明，这些香烟中，含有苯类衍生物、杂环类化合物及多环化合物等，从36种到131种不等，绝大多数有害人体健康。
Heterocyclic compounds and their coordination complexes have received much attention for their application in biological engineering, food perfume chemistry, organic synthesis and dyestuff chemistry.
杂环化合物及其金属配合物因在生物工程、食品香料化学、有机合成和染料化学等领域内的应用而成为研究的热点。
It's thought that compounds in cooked meat called heterocyclic amines (HCAs) are to blame.
原因据认为是熟肉中含有被称为杂环胺(heterocyclic amines,HCAs)的化合物。
This article has presented a modified molecular connectivity indices used in the QSARs research of the aqueous solubilities of heterocyclic nitrogen compounds.
本文采用一种修正的分子连接性指数研究了氮杂环类化合物水溶解度的定量结构性质关系。
Novel thio-substituted, nitrogen-containing, heterocyclic phosphonate compounds, pharmaceutical compositions, and methods of treating abnormal calcium and phosphate metabolism.
新的硫取代含氮杂环膦酸化合物，药物组合物，和治疗钙与磷酸盐异常代谢的方法。
The origin: In a 1986 study, Japanese researchers discovered cancer developing in rats that were fed "heterocyclic amines, " compounds that are generated from overcooking meat under high heat.
缘起：1986年，日本科学家在研究中发现，老鼠在食用了一种叫“杂环胺”的化合物之后发生了癌变。这种化合物来自高温下长时间烹煮的肉类食物。
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