查询词典 pollution

Aiming at the established three-layer infrared radiative transfer model of pollution cloud, the infrared radiative spectra of the pollution clouds at different concentrations were simulated with the field background spectra (that are measured by Fourier transform infrared spectrometer) and every interferent radiative spectrum as the basic radiative data.

当模型考虑干扰物和背景辐射的变化影响时，污染云团在810cm-1，920cm-1和1040cm-1波段上的光谱特征明显减弱。

Aiming at the established three-layer infrared radiative transfer model of pollution cloud, the infrared radiative spectra of the pollution clouds at different concentrations were simulated with the field background spectra (that are measured by Fourier transform infrared spectrometer) and every interferent radiative spectrum as the basic radiative data.

结果表明：利用实测场地背景辐射光谱和该模型仿真污染云团DMMP红外光谱，光谱在810cm-1，920cm-1和1040cm-1波段上有明显的特征峰。

Heterophyllum and S. jambos had highest potentials in resisting pollution stress, and S. octophylla was most sensitive to pollution.

综合实验结果表明，5种植物幼苗中对大气污染抗性最强的是翻白叶树和蒲桃，抗性最弱的是鸭脚木。

As for the monitor of water pollution, Lemna minor, Spirodela polyrrhiza shleid and Azalla imbricate Nakai could be used as the monitors for the naphthalene pollution in water body because of their sensitivity to it.

在净化过程中，萘对5种水生植物产生生理毒害作用，且随萘浓度的增加显示出明显的毒害效应，表现为呼吸强度受到抑制，叶绿素含量降低；对POD而言，凤眼莲、喜旱莲子草随萘浓度增加逐渐升高，而浮萍、紫萍则表现出先升高然后降低，满江红一直降低。

With Yangtze delta tidal flat as an example, through the analysis on the magnetic characteristics of tidal flat sediment and the study on the space distribution of heavy metal elements, this thesis discussed the impact to Shanghai sea bank brought by heavy intensity development, and the interrelation between sediment power effect and heavy metal pollution space distribution. Utilizing the advantage of artificial intelligence neural network, in conjunction with environmental chemical analysis, from the angle of view of sediment magnetic characteristics, it analyzed the connection mechanism between magnetic mines and heavy metal element within tidal sediments, and built a quantitative magnetical diagnosis model, in attempt to calculating the tidal heavy metal pollution status from the magnetic measurement data of sediments and assess it's impact to the environment.

中文题名长江口潮滩重金属污染的磁诊断模型研究副题名外文题名论文作者许羽导师俞立中教授学科专业自然地理学研究领域\研究方向资源与环境信息系统学位级别博士学位授予单位华东师范大学学位授予日期2001 论文页码总数111页关键词长江口潮滩沉积物环境磁学重金属污染馆藏号BSLW /2001 /X145 /11 本文以长江口南岸潮滩为例，通过对潮滩沉积物磁性特征的分析、重金属元素空间分布的研究，探讨了上海滨岸带高强度开发对潮滩环境质量的影响，以及沉积动力作用与重金属污染空间分布格局的联系。

Panyue, the deputy of Ministrator of Eniveronment Protection disclosed to the press that facing the severe water pollution, Ministration of Eniveronment Protection will conduct "Examination and Approval of Valley" in 6 cities, 2 counties and 5 industry parks which water pollution and nonabservance are severe in Yangtze River, Yellow River, Hui River and Hai River.

环保总局副局长潘岳今日向新闻界通报，针对中国当前严峻的水污染形势，环保总局自即日起对长江、黄河、淮河、海河四大流域部分水污染严重、环境违法问题突出的6市2县5个工业园区实行&流域限批&；对流域内 32家重污染企业及6家污水处理厂实行&挂牌督办&。

General analysis indicates that Myriophyllum spicatum L.Panicle shape of the absorption of chromium Cr6 + concentration and treatment exist between the concentration of significant positive correlation with Myriophyllum spicatum L.can pollute the environment in better enrichment of chromium, the background environment The higher concentration levels of heavy metals, plant accumulation of heavy metals in higher concentration levels, the application of plant technology for the repair of heavy metal pollution on the environment to provide a scientific basis on Myriophyllum spicatum L. of heavy metal pollution of wetland restoration has great potential.

综合分析表明，在一定范围内，穗状狐尾藻对铬Cr6+的吸收富集含量随处理浓度升高而增大，说明穗状狐尾藻在污染环境中能较好地富集重金属铬，从而得出在一定范围内，环境背景中重金属含量水平越高植物富集重金属的含量水平也越高的结论，这就为应用植物技术修复重金属对环境造成的污染提供科学依据，而穗状狐尾藻对湿地重金属污染具有较大的修复潜力。

Weak soil Naphthalin pollution stress stimulate protein content,strong pollution restrain protein content.

低浓度萘污染对玉米籽粒中蛋白质含量具有一定刺激作用，但高浓度组均存在胁迫作用。

Influence on corn DNA methylation frequency and half DNA methylation frequency is stronger under soil Naphthalin pollution in seedling and grouting stage, this is other mechanism of siol Naphthalin pollution stress.

这可能是土壤萘污染胁迫影响玉米生长发育的一种机制。

In this paper,the pollution sources and the hazards of the pollutants in nitrotoluene production are briefly described,the various approaches for reducing and eliminating the pollution by adoption of cleaner production are outlined.

文摘：简介一硝基甲苯生产过程中污染物的产生和危害，概述了采用清洁生产技术减少和消除污染的各种途径。

The receding calculations and experiment analyses in this subject are built on the blood cast of pig tongue.

本研究课题的前期工作是采用猪舌血管铸型模拟人舌而进行的数值计算与实验分析。

"Each human infection constitutes an opportunity for genetic modification of the virus through reassortment, mutation, or both...."

&每一次人类的感染都暗藏着一次基因修改的机会，无论是通过病毒的整合、突变或者兼而有之。。。。&