查询词典 sediment-covered

Multiple experiments such as grain-sized separation , magnetic mineral analysis, magnetic parameters measurement were made on 110 surface samples and 64 samples of the 180 core sediment taken from the shelf of the East China Sea to abyssal plain of the Okinawa Trough .

本文选取东海陆架至冲绳海槽槽底平原的代表性沉积样品110个和已有研究基础的DH180岩心样品，通过颗粒分离、磁性矿物分析、趋磁细菌培养、浮游有孔虫δ~(18)O测定、AMS~(14)C测年、多种磁学参数测量(包括磁化率、等温剩磁、x-T热磁曲线、磁滞回线、非磁滞剩磁和饱和等温剩磁等)等试验手段，分析探讨了不同粒级沉积物对磁性的贡献、沉积物磁性与物质来源及环境的内在联系、短期古海洋事件的环境磁学表现等科学问题。

Lake sediment records ; spectrum analysis ; period ; Holocene

湖泊沉积记录；多窗谱分析；周期；全新世

INTRODUCTION As a part of the research program of the Water Resources Division of the U.S. Geological Survey, a project was organized in September 1956 to study the mechanics of water and sediment movement in alluvial channels.

介绍 如美国的水资源区分的研究计画的一部份地质学的调查，一个计画在 1956 年九月被组织学习冲积的频道水和沉淀物运动的技巧。

In the current study, anoxic dechlorinations of p, p'-DDT,γ-HCH, HCB in the Liao River sediment were studied under the following conditions: without any additional short chain carbon substrates or vitamin B〓; with the addition of short chain carbon sources (including sodium lactate, sodium propionate or sodium acetate); with the addition of vitamin B〓; with the addition of both short chain carbon substrates and vitamin B〓, with the addition of sodium dodecyl sulfate , a kind of surfactant; the coexistence of the three chlorinated compounds.

氯代有机物一般都是典型的持久性环境污染物，其中部分氯代有机物还是环境激素类物质，例如，滴滴涕、林丹和六氯苯等，这些氯代有机物在环境中的迁移转化一直是国际环境化学领域的热点、重点课题。氯代有机物进入环境水体后，成为沉积物吸附态有机污染物的重要成分，天然水沉积物经常处于缺氧状态。因此，研究氯代有机物在天然水体沉积物中的缺氧脱氯行为是非常必要的。

In the current study, anoxic dechlorinations of p, p'-DDT,γ-HCH, HCB in the Liao River sediment were studied under the following conditions: without any additional short chain carbon substrates or vitamin B〓; with the addition of short chain carbon sources (including sodium lactate, sodium propionate or sodium acetate); with the addition of vitamin B〓; with the addition of both short chain carbon substrates and vitamin B〓, with the addition of sodium dodecyl sulfate , a kind of surfactant; the coexistence of the three chlorinated compounds.

本文分别采用不外加碳源和维生素B〓外加碳源（包括乳酸钠、丙酸钠或乙酸钠）、外加维生素B〓以及同时外加碳源和维生素B〓的方法，考察了p，p'-DDT、γ-HCH和HCB三种氯代有机污染物单独或混合存在下，在辽河沉积物中缺氧脱氯降解的情况，主要得到以下结论

The paper summarizes the environmental hormone behavior,source and exist in g situation of phthalic acid ester pollutants in air,water,organism and sediment.

该文叙述了环境中邻苯二甲酸酯类污染物的环境激素行为、来源及在环境空气、水体、生物、底质中的存在情况。

This paper established the LC-ESI-MS method to analyze pentachlorophenol in water and sediment samples, and then investigated the occurance of PCP in Haihe basin and Bohai bay.

建立了水和沉积物中五氯酚的LC-ESI-MS分析方法，并调查了海河流域以及渤海湾水体和沉积物中PCP的污染状况。

During incubations, significant uptake fluxes of NO(superscript - subscript 3) and SiO(superscript 2- subscript 3) were commonly shown at the sediment-water interface, and largely controlled by their concentrations in the overlying water. The molecule diffusive fluxes, calculated from the concentration gradients between overlying water and surface pore water, seemed not so important in the exchange fluxes.

沉积物－水界面交换过程在春季表现为对NO(上标-下标 3)和SiO(上标 2-下标 3)的吸收，吸收的量在很大程度上取决于上覆水中这两种营养盐的浓度；由上覆水和表层间隙水浓度梯度所决定的分子扩散通量对实际交换通量的控制有限。

In the raft mari-culture waters of the Jiaozhou Bay, China, a benthic chamber system for production measurement in situ was established. The O 2-flux was calculated based on the benthic closed-circuit chamber incubations of undisturbed sediment under light and dark conditions for estimating the benthic primary production and respiration.

为对生态系统的健康评估及底栖生物资源的开发利用提供技术支撑，在胶州湾筏式养殖水域，建立了底栖生物生产力现场测试系统，并在光照和黑暗条件下测定了沉积物海水界面溶解氧随时间的变化、计算了氧通量、估算了底栖总初级生产力和群落呼吸。

A relatively small area and the relatively large amount of coarse sediment reduction interceptions .

治理面积相对较小，拦减粗泥沙量相对较多

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。