甲基吡啶的热稳定性比吡啶差，热解时甲基首先脱离芳香环进入气相，随后芳香环的反应途径和吡啶类似；
In the picoline pyrolysis experiment, the methyl disengages from aromatic ring to form methane firstly, then the following reaction of the aromatic ring is similar to pyridine.
此外，根据红外光谱特征分析，可以知道该虫蜡泌物的化学成分主要为长链脂肪酸、脂肪醇和一些带芳香环的化合物。
Based on the infrared spectra, it is suggested that the scale insects waxy compounds are composed majorly by long-chain fatty alcohol and fatty acids and some compounds with aromatic ring.
根据红外光谱特征分析，推测该虫蜡泌物的化学成分可能主要是由长链烃、长链脂肪酸、脂肪醇和某些带芳香环的化合物组成。
Based on the infrared spectra, it was suggested that the scale insect's waxes be composed most by long-chain hydrocarbons, fatty alcohols, fatty acids and some compounds with aromatic rings.
绿色则表明了大分子多环芳香烃的存在。
The green indicates the presence of complex molecules called polycyclic aromatic hydrocarbons.
有毒的matagenic和致癌物质PAH二醇环氧化合物均来源于多环芳香烃(PAH)，它是导致大多数肺癌的罪魁祸首。
Toxic matagenic and carcinogenic PAH diol epoxides can be derived from PAHS, which are responsible for most cases of lung cancer.
香烟中的污染物质PAHs(多环芳香烃)会在几分钟内对基因造成损害。
Pollutants in cigarettes called PAHs (polycyclic aromatic hydrocarbons) can cause genetic damage in minutes.
用气相色谱对低烯烃火花点火引擎燃料芳香碳氢化合物类型，环烃，烯烃，石蜡和氧化物的标准试验方法。
Standard test method for oxygenates and paraffin , olefin , naphthene , aromatic o - pona hydrocarbon types in low - olefin spark ignition engine fuels by gas chromatography.
本文报道用环加成-芳构化串连反应制备多取代芳香族化合物的方法。
The synthesis of polysubstituted aromatic compounds by using tandem cycloaddition aromatization reaction was reported.
本发明含唑环半芳香聚酰胺具有易加工和耐热温度高的优点。
The semi-aromatic polyamide containing oxazole ring of the invention has the advantages of easy processing and high heat-resistant temperature.
戊烷沥青质中以迫位缩合的芳香环系结构为主，胶质组分中渺位缩合与迫位缩合的芳香环系结构各占相当比例。
The aromatic structure of pentane asphaltenes is mainly peri condensed, while for resins the proportion of cata condensed and peri condensed aromatic structures is comparable.
从煤分子结构出发，煤的反应性可以用芳香环，氢化芳香环，烷烃链、烷烃键和含氧官能团的变化来描述。
From molecule structure of coal, coal reaction character was described by aromatic ring, hydrogenation aromatic ring, alkane, alkane bond, oxy-group.
试验结果表明：水动力弥散和混合电子受体条件下的土著微生物降解是乙醇和单环芳香烃(BTEX)自然衰减的主要过程。
The results show that hydrodynamic dispersion and indigenous biodegradation under mixed electron accepter conditions are primary mechanisms for the attenuation of ethanol and BTEX in porous media.
调查东北某工业城市大气颗粒物质和多环芳香烃类化合物的浓度以及它们的致突变活性。
To investigate concentrations of polycyclic aromatic hydrocarbons (PAH) in Ambient particulate matter and their mutagenic activities in an Industrial Area of Northeastern China.
本文对多氧芳香型三环二萜化合物的全合成进行了综述。
In this paper , the total synthesis of polyoxygenated aromatic tricyclic diterpenes is reviewed.
而且多环芳香烃受体也已被证实会参与在血管新生的调控。
Some researches show that aryl hydrocarbon receptor is involved in regulation of angiogenesis.
吡喃盐是指含有六元氧杂环正离子结构的有机芳香化合物，因其独特的化学及物理特性而具有非常广泛的应用价值。
Pyrylium salts are a type of organic aromatic compounds with one or more six-numbered oxoheterocyclic cations, which are practically valuable owing to their peculiar chemical and physical properties.
芳香环谱带的相对强度和频率对于镧系元素原子序数的依赖关系表明双-双效应的存在。
The dependence of relative intensity and frequency of bands of aromatic ring on the atomic number of lanthanides indicates the presence of a double-double effect.
讨论了卟吩环系的共轭体系和芳香性质，以及与化学反应活性的联系。
The relationship between conjugated system and chemical reaction of chlorophyll derivative was discussed.
一般情况下，馏分的相对分子质量越大、稠环芳香结构和羰基含量越高，则乳状液越稳定。
Generally, the heavier the relative molecular mass, the higher the content of aromatic structure or the higher the content of carbonyl group, the more stable the emulsion is.
研究认为：“这项结果相当重要，因为多环芳香环氧二醇（PAH diol epoxides）易与DNA反应，引发突变，所以被认为是吸烟产生的众多环芳香烃中最严重的致癌物质。”
"These results are significant because PAH diol epoxides react readily with DNA, induce mutations, and are considered to be ultimate carcinogens of multiple PAH in cigarette smoke, " the study said.
这种新型含吡啶环芳香三胺单体的成功合成将为一类新型超支化聚酰亚胺的制备奠定重要的基础。
The successful synthesis of the aromatic triamine containing pyridine ring laid an important foundation for preparation of a novel hyperbranched polyimide.
通过各硫氮环分子稳定性的比较，确定只有一部分硫氮环分子具有“多电子芳香性”。
By comparing the stability of the sulfur nitrogen ring system it is proved that not all the plannar S-N heterocycles belong to a class of"electro-rich" aromaticitys.
轨道理论和周环反应：关于化学键和芳香性的现代概念。
Molecular Orbital Theory and Pericyclic Reactions: Modern concepts of bonding and aromaticity.
本文首次合成了几种含苯并呋喃苯并噻吩环的新的芳香族四羰基化合物，并对它们进行了元素分析和红外光谱测定。
Several new bis (1,2-dicarbonyl) compounds containing benzofuran or benzothiophene ring have been synthesized and identified by elemental analysis and Infra red spectroscopy.
本文按一步合成法、多步合成法和解聚成环法三种不同路线综述了芳香环状低聚体的制备及其研究现状。
Synthetic methods and their research progress of aromatic cyclic oligomers, including one-step polymerization, multi-step polymerization and cyclo-depolymerization are rev…
本文按一步合成法、多步合成法和解聚成环法三种不同路线综述了芳香环状低聚体的制备及其研究现状。
Synthetic methods and their research progress of aromatic cyclic oligomers, including one-step polymerization, multi-step polymerization and cyclo-depolymerization are rev…
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