PCDFs

Correlativity between group modify index and chromatography retention value of PCDFs

二恶英类化合物多氯代二苯并呋喃色谱保留值与基团修饰指数的相关性

Preliminary Study on Level and Pattern of PCDD / PCDFs in Soil in Part of Beijing City

北京市部分地区土壤中二恶英类物质污染水平初探

Predicting Gas Chromatographic Retention Indices of PCDFs with Novel Molecular Descriptors

用新型分子结构参数预测多氯代二苯并呋喃的色谱保留指数

Predicting Ah Receptor Binding Data of PCDFs Using Quantum Chemical Method ( 1 ) & Artificial Neural Network Approach

用量子化学方法预测PCDFs的Ah受体结合能力（1）&神经网络模型

Relationship Study Between the Retention Behavior on Diverse Gas Chromatographic Stationary Phases and Molecular Structure Information Connectivity Indices of PCDFs

多氯代二苯并呋喃的结构信息连接性指数与其在不同色谱柱上的气相色谱保留行为的关系

Determination of PCDDs and PCDFs in Tissue Samples by Rapid Extraction-ASE

快速溶剂萃取法分析组织样品中的二恶英（PCDDs）和多氯二苯呋喃（PCDFs）研究

Extensive stores of PCB-based waste industrial oils , many with high levels of PCDFs , exist throughout the world .

PCB工业废油的大量储存，其中许多含有高浓度的PCDFs，这种现象遍及全球。

The model could better reflect the relationship between PCDFs molecular AhR binding affinities and its molecular Cl-substitutions .

模型可以较好地反映PCDFs分子Ah受体结合能力与其分子氯取代位点之间的关系。

PCDDs and PCDFs in waste from thermal decomposition of BHCs

六六六热解残渣中PCDDs和PCDFs的测定

The formation mechanism of pollutants , such as dust , acid gas , PCDDs and PCDFs in waste incineration and control measures are introduced .

详细介绍了垃圾焚烧污染物中的飞灰颗粒、酸性气体、二恶英、呋喃类化合物的形成机理及控制措施。

PCDDs and PCDFs in thermolysis waste of HCH were analyzed by HPLC and GC / MS.

采用HPLC和GC/MS法对六六六热解废渣中的PCDDs和PCDFs进行了测定。

HPLC and GC / MS have been used for the analysis of PCDDs and PCDFs in solid wastes from production of trichlorobenzenes .

采用HPLC和GC/MS，对我国采用热解六六六法生产三氯苯的废物中PCDDs和PCDFs进行了分析。

Dioxins is one kind of permanent organic pollutant , including Dibenzo-p-dioxins ( PCDDs ) and dibenzofurans ( PCDFs ) .

二恶英类化合物是一类持久性有机污染物，包括多氯代二苯并二恶英（PCDDs）和多氯代二苯并呋喃（PCDFs）。

Prediction of Photolysis Half-lives of PCDFs with E-State Indices

电性拓扑态指数预测PCDFs的光解半衰期

QSPR on Octanol / Water Partition Coefficient of Selected Herbicides ; QSPR research on the log K_ ( ow ) of PCDFs

部分除草剂正辛醇/水分配系数的QSPR研究

Quantitative Structure-Retention Relationship ( QSRR ) Studies of Polychlorinated Dibenzofurans ( PCDFs ) on Diverse Gas Chromatographic Stationary Phases on a Set of Novel Molecular Distance Edge Vector

距离边数矢量与分子相似度的计算多氯代二苯并呋喃在不同色谱柱上的气相色谱保留行为&定量结构-色谱保留关系（QSRR）的研究

The long half-lives of PCDDs , PCDFs and " dioxin-like " PCBs mean that each daily ingestion has a small or even a negligible effect on overall intake .

PCDF和“类二恶英”PCB的半衰期很长，意味着每天的摄入对总摄入量的影响很小甚至可忽略不计。

Numerical simulation of rockburst on the drain tunnel in the Jinping Second Level Hydropower Station Concentrations and Congener Profiles of PCDDs / PCDFs in Flue Gas Samples from Oil Type Crematories

锦屏二级水电站施工排水洞岩爆数值模拟燃油式火化机排放烟气中二恶英类污染水平和排放特征

Concentrations and Congener Profiles of PCDDs / PCDFs in Flue Gas Samples from Oil Type Crematories Lean burn mixture combustion of gasoline engine is an effective approach for reducing emissions and fuel consumption .

燃油式火化机排放烟气中二恶英类污染水平和排放特征汽油机燃烧稀混合气是降低有害尾气排放、油消耗率的有效途径。

The name " dioxins " is often used for the family of structurally and chemically related polychlorinated dibenzo para dioxins ( PCDDs ) and polychlorinated dibenzofurans ( PCDFs ) .

其名称“二恶英”通常用来指结构和化学性质相关的多氯二苯二恶英（PCDDs）和多氯二苯并呋喃（PCDFs）。

First , the teratogenicity and carcinogenicity of TCDD in mice and rats , mutagenicity of PCDD in Salmonella , and the single oral LD50 values for some PCDDs and PCDFs in animals were summarized .

总结了T4CDD对小鼠和大鼠的致畸和致癌性.PCDD对沙门氏菌的致突变性以及PCDDs，PCDFs对动物的LD（50）值。

Two main sources of PCDDs and PCDFs , the combustion processes especially the emission from incineration and automobile exhausts , and the industrial processes including sludge from pulp and paper industry which is found to be the most significant new industrial source , were described .

从中可以看到，PCDDs和PCDFs主要来源于燃烧过程特别是焚烧和汽车废气的排放，以及工业过程如制浆及造纸工业的污泥，它被认为是最重要的新的工业污染源。

This thesis is mainly concerned with the following aspects : ( 1 ) In this study , the levels of PCDD / PCDFs and dl-PCBs in sediments from the rivers of typical thermal industrial city Tangshan and chemical industrial base Tianjin , Tanggu were investigated .

对典型热工业城市唐山以及著名化工生产基地天津塘沽的主要河流表层沉积物中的PCDD/Fs和dl-PCBs污染水平进行了研究。

Polychlorinated dibenzofurans ( PCDFs ) is included in the blacklist of so-called persistent organic pollutants , and the photolysis is its predominant degradation mechanism in the real environment . Currently the application of quantum chemical approaches to study the photolysis property has not reported .

多氯代二苯并呋喃（PCDFs）是持久性有机污染物之一，其光化学降解是其主要的环境降解途径，本文是采用量子化学方法对PCDFs光解性质进行研究。

The sample was dissolved in toluene and subjected to an alumina column chromatography . PCDDs and PCDFs were eluted with 50 % methylene chloride in petroleum ether . After concentration , the organics were analyzed by GC / MS using SIM mode .

样品用甲苯溶解，然后进行氧化铝柱层析分离，PCDDs和PCDFs用50%二氯甲烷的石油醚液洗出，浓缩后进行GC/MS分析。

Large quantity of tetra - through octa - PCDDs and PCDFs , amounting to about 40 percent of the sample wight were found in the waste . Among them , 2,3,7,8-TCDD , the most toxic congener , was also detected .

在热解残渣中检出了大量四至八氯取代的PCDDs和PCDFs，约占样品量的40%，其中包括剧毒的2,3,7,8-TCDD。

In the thermal decomposition process , significant amounts of PCBs , PCDDs and PCDFs were formed although they were existed mainly in the waste and among them , 2 , 3,7 , 8-TCDD , the most toxic isomer , was found more than 24 ppm .

在热解工艺中，废渣内发现大量的PCBs，PCDDs和PCDFs，最毒的异构体，2,3,7,8-TCDD含量高达24ppm。