查询词典 polycyclic

Fifty-seven kinds of polycyclic aromatic hydrocarbon were detected by qualitative method,and sixteen kinds of those were mensurated by quantitative method.The results suggested that the average concentration of chry was the highest,21.83 ng/m3;the average concentration of fluoranthene was the second highest, 21.14 ng/m3; the mass c...

并对16种多环芳烃定量测定，结果表明：以屈艹为最高，平均值为21.83ng/m3；荧蒽次之，平均值为21.14ng/m3；苯并芘的质量浓度为14.52ng/m3，不满足GB3095-96中的质量浓度限值。2001～2003年检测结果对比表明，部分监测点空气中多环芳烃的浓度有下降的趋势。

The aim of this paper is to remove the polycyclic aromatic hydrocarbons from hot gas during coal combustion. The adsorption for PAHs including Napthalenene, Fluorene and Phenanthrene with six sorbents was investigared.

针对热电厂烟气中排放的多环芳烃污染物，在实验室规模上研究了六种吸附剂对烟气中典型的PAHs，如萘、芴、菲的吸附脱除行为。

A new fused polycyclic indoline compound was synthesized from aniline,with the key step of Pd-catalyzed tandem cyclization using hydroquinidine as the ligand and molecular oxygen as a green oxidant.

以芳香氨为原料，通过烯丙基化、重排、酰基化及钯催化的氧化环合反应合成了一种新的氮杂三环吲哚啉化合物，其结构经1H NMR，13C NMR，IR及HR-MS表征。

The dissertation mainly consists of two parts:1. The Reaction Chemistry of Alkynes under Palladium Catalysis Part 1 studies the reaction α,β-unsaturated carbonyl compounds with alkenylpalladium intermediate generated by nucleopalladation, and discovered 1 the Pd-catalyzed tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls,2 the four-component tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls, 3 the tandem intramolecular oxypalladation-conjugate additionreaction of alkynoic acids with α,β-enals. These new reactions provide notonly efficient highly stereoselective methods for the synthesis of γ,δ-unsaturated,polyunsaturated carbonyl compounds and γ-lactonic aldehydes, but also thebasic transformations for a number of C-C bond formation reactions which can be usedto design synthesis of many acyclic, cyclic or polycyclic compounds.

本论文的主要工作分为两个部分：一、钯催化下炔烃的反应化学在本小组前人工作的基础上，我们详细研究了炔烃亲核钯化产生的烯基钯中间体与α，β-不饱和羰基化合物的反应，发现两价钯催化下卤离子-炔烃-α，β-不饱和醛酮的串联加成反应、卤离子-炔烃-α，β-不饱和醛酮的西组分串联加成及炔酸分子内氧钯化-串联Michael型加成反应；由此发展了γ，δ-不饱和醛酮、多不饱和羰基化合物和带有醛酮基侧链的γ-丁内酯衍生物的高立体选择性合成方法，这一过量卤离子存在下的烯基钯对α，β-不饱和羰基化合物共轭加成反应的发现，为大量碳-碳键形成反应的实现提供了基础，使我们能够从这一基本反应出发，设计和开发多种分子内、分子间的碳碳成键反应，以好的立体、区域选择性组建开链、环状及多环类型的化合物。

Use this time-resolved detecting system for testing some typical monocyclic and polycyclic aromatic hydrocarbons.

三、利用上述荧光时间特性探测系统对一些典型的单环，多环芳香族油污染物的荧光时间特性进行了测试研究。

Natively, first set up one laser-induced fluorescence remote sensing system, which has more complete function and is composed of modern detecting ability equipment including time-selected, spectrum fast received and interrelated detecting technology. Applying this system for detecting common monocyclic and polycyclic aromatic hydrocarbons'fluorescence spectrum. Have a preliminary research of classifying and distinguishing of the kinds of oil pollutants.

一、在国内首先建立了功能比较齐备，技术上采用了具有二十世纪九十年代特点的时间选通，光谱并行接收，相关探测等先进探测处理能力的荧光遥感模拟实验系统，利用该实验装置对常见的水面单环、多环、芳香族油污染物的荧光光谱进行了较系统的测试，并进行了分类识别的初步研究。

This strain is able to degrade polycyclic aromatics such as naphthalene and biphenyl as well as monocyclic aromatics such as phenol. Under experimental conditions, strain DF51 is capable of degrading at concentrations of phenol ranging from 100 mg to 800 mg, which is catabolized mainly through the catechol 1, 2-dioxygenase pathway with a minor catechol 2, 3-dioxygenase pathway.

DF51。在本实验条件下，菌株DF51能够有效降解浓度范围为100-800mg L-1的苯酚，该菌代谢苯酚主要是通过邻苯二酚1， 2-双加氧酶催化开环途径进行，同时辅以邻苯二酚2， 3-双加氧酶催化开环，表明菌株DF51兼有混浊红球菌(Rhodoccocus opacus R7)和红球菌PNAN5Rhodoccocus sp。

Gas chromatograph/mass spectrometer system was used to analyze polycyclic aromatic hydrocarbon (PAHs, including naphthalin, anthracene and fluoranthene) and phthalic acid ester [PAEs, including dimethyl phthalate, diethyl phthalate, diisobutyl phthalate and di(2-ethylhexyl) phthalate] concentration in water samples taken from every treatment units of a large-scale waterworks in a western city whose water source is the upstream of Yangtze river.

以多环芳烃(包括萘、蒽、荧蒽三种物质)和邻苯二甲酸酯包括邻苯二甲酸二甲酯(DMP、邻苯二甲酸二乙酯、邻苯二甲酸二异丁酯、邻苯二甲酸二(2-乙基己基)酯4种物质作为研究对象，采用GC-MS方法测定了以长江为原水的某大型城市给水厂各工艺段水样中的上述物质。

In species of Pinus which are polycyclic flower initiation must occur over a wide time range.

具有多环球花的松树属种，其花的孕育期会延续较长的时间。

However, research on polycyclic aromatic hydrocarbons in the environmental medium within the industrial area has not been reported yet.

目前国内外对环境中的多环芳烃已开展了较多的研究，但有关工业区环境介质中的多环芳烃研究尚未见报道。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。