查询词典 heavy water

Starch xanthate is a metal complex, it is widely used to remove heavy metals in water environment system.

淀粉黄原酸酯是一种金属络合剂，广泛应用于去除水环境体系中重金属。

The introduction of amido groups can efficiently increase the water swellability of polyvinyl alcohol film and simultaneously enhance the adsorbability of the film to heavy metal ions.

胺基的引入有效的增强了聚乙烯醇膜的水溶胀性，同时使得膜对重金属离子的吸附能力有很大的提高。

In order to provide some scientific data for judging biological toxicity and bioavailability caused by heavy metals in sediments in Guilin, China, for the first time, the authors sampled sediments in different water areas in Guilin, and determined AVS by P-Amino dimethyl aniline dihydro chloride photometry through a set of acidification-ventilation-absorption AVS reaction unit, determined copper, lead, zinc, cadmium and nickel with tomic absorption spectrophotometry, mercury and arsenium with atomic fluorescence, and cipangopaludina cathayensis was selected as the tested species for bioavailability experiment.

首次以桂林水系沉积物为研究对象，通过酸化－吹气－吸收装置，用对氨基二甲基苯胺光度法测定沉积物中AVS含量，用原子吸收分光光度法测定SEM和间隙水中Cu、Pb、Zn、Cd、Ni含量，用原子荧光法测定Hg、As含量。

In the exploitatation and utilization of Bromus stamineus, we must take the different sowing methods and plant densities into account. They have heavy influences on the forage especially in terms of the forage growth. The salt, temperature and water are important factors that affect the seeds germination,which deciding the germination time and germination place.we designed four temperature (15℃,20℃,25℃,30℃) and NaCl density(0.3%,0.6%,0.9%,1.2%) and PEG density(0.126g/gwater,0.186 g/gwater,0.232 g/gwater,0.270 g/gwater).

引进美国无芒雀麦是农业部948项目&旱生灌草植物资源的引进及开发利用&的引进草种之一，为了合理开发和利用它，本论文对引进无芒雀麦和本地无芒雀麦的种子萌发、田间种植和栽培技术3个方面进行了对比研究，比较了两种无芒雀麦生长特性；结合方差分析，确定了引进美国无芒雀麦种子萌发指标和栽培技术指标。

PCC 7942 by Triparental Conjugative Transfer, and detected expression of α-α. The heavy metal selective absorbance analysis indicated that these transgenic cyanobacteria inclined to absorb firstly Cd〓 and Pb〓 in water.

通过对重金属离子的选择吸收性多方面检测，结果表明在用来吸收水体中对人体有害的金属离子方面，转α-α基因藻有很强的选择吸收性。

Finally, this paper investigated the compositions, contaminative situations, speciation and release of heavy metals in contaminated sediments from Guangzhou water body.

论文最后研究了广州城市水体沉积物的组成、重金属污染状况及其形态分布和重金属的释放及其动力学。

Rainfalls can " deposit " the co2 in air , making it to take part in the process of karst , to dissolve and corrade carbonate rock . co2 concentration in soil become lower after heavy rainfall and become higher after general rainfall .( 8 ) the value of chemical characteristic of soil water in the high elevation area is lower than that in the low elevation area

降雨可以对coz产生影响，&沉淀&大气中的co ：，使其参与到岩溶作用中，溶蚀碳酸盐岩；降雨对土壤空气中coz的影响与雨强、雨量有关，降雨量、雨强较大时，土壤空气中的c02产生受到抑制，降雨量和雨强较小时，土壤空气中的coz浓度升高。

First,the content of surfactant should be more than 18 percent and the content of anion surfactant should be kept in proper proportion to the content of nonionic surfactant. Second,the content of zinc naphthenate should be kept in directly proportional to the content of other surfactant. Third,the content of rosin shouldnt too higher and the content of oleic acid should be kept in directly proportional to the content of rosin. Fourth,the content of water should be kept in a low level (less than 8%);otherwise emulsifier oil will delaminate. In addition,the requisite content of sodium heavy alkyl benzene sulfonate is higher than petroleum sulfonate.

试验表明在以松香、重烷磺酸钠、石油磺酸钠为主要乳化剂时，要获得优良的乳化液，需满足以下几个条件：(1)需在乳化油配方中加入适量的乳化剂，且其中阴离子乳化剂总量与非离子乳化剂总量的应保持适当的比例；(2)乳化油中环烷酸锌的量与其它乳化剂总量要保持正比关系；(3)乳化油中松香的量不易过大，且油酸的加入量应与松香量成正比；(4)乳化油中水分含量不易过高(一般不能大于8％)，过高时稳定性不好，易分层。

The heavy elements of Br, Hg and Pb in Caridina denticulate sinensis are 5, 2.7 and 2.3 times higher than that in Macrobrachium nipponesis from the same water.

生活在同一水环境中米虾的重元素Br、Hg和Pb的富集量分别是沼虾的5.0倍、2.7倍和2.3倍。

The technologies 0f the natural gas pretreatment mainly include:removal 0f acid gas,water,mercury and heavy hydrocarbon;fluidification process mainly include:step—type refrigeration circulation,refrigeration circulation 0f mixed refrigerant and refrigeration circulation 0f expander.

天然气预处理的工艺技术主要包括：酸性气体的脱除、水的脱除以及汞及重烃的脱除等；液化工艺流程主要有阶式制冷循环、混合制冷剂制冷循环、膨胀机制冷循环。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐