trivalent是什么意思

A trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder.

一种三价非金属元素，或呈坚硬的黑色晶体状，或呈黄色或棕色粉末状。

The plating process involves trivalent chrome passivation, and so is free from Cr 6.

在电镀过程涉及的三价铬钝化, 所以是免费的由铬.

Study of Trivalent Chromium Bright Blue Passivation Process for Zinc Coating

镀锌层三价铬蓝白色钝化工艺的研究

Safety of the trivalent inactivated influenza vaccine among children: A population-based study

儿童三联灭活流感疫苗的安全性：一项基于人群的研究

The trivalent vaccine against typetype 3 against type 1 type one and highly effective against typetype 2.

三价疫苗对于类型3病毒效果最差,类型1病毒效果稍好,对于类型2泽很有效.

A trivalent metallic element of the rare earth group, it could occurs with yttrium.

稀土属三价金属元素, 可以与钇共生.

A hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition.

一种二价或三价金属元素，坚硬的银白色铁磁体，植物动物营养中的微量元素。

Comparison on Immunity Effects of Trivalent Oil-adjuvant Inactivated Vaccine with Different Genotype and Inactivated La Sota Vaccine against Newcastle Disease Virus

不同基因型NDV灭活油乳苗与La Sota株灭活油乳苗的免疫效果比较

The effect of the crystal field on the spin orbit coupling parameter of the 4f electrons of rare-earth trivalent ions in rcl_3

晶体电场对离子自旋&轨道耦合参数的影响

The hazards of hexavalent chromium electroplating, and the benefits of trivalent chromium electroplating were analyzed.

分析了六价铬电镀的危害及三价铬电镀的优点, 以及三价铬电镀取代六价铬电镀带来的效益.

The usual source of trivalent cations in water treatment is alum ( aluminum sulfate ).

在水处理中三价阳离子通常来源于明矾 ( 硫酸铝 ).

It is found that morin and rutin can compete trivalent aluminium ion from the complex of trivalent aluminium ion and Bovine Serum Albumin.

结果显示桑色素、芦丁在模拟生物环境中能够与铝相互结合，并能够拮抗铝离子与牛血清白蛋白的结合。

Removal of trivalent chromium from its dilute solution with hydrophobic microporous PTFE membrane

疏水性PTFE微孔膜处理含Cr（III）稀溶液的实验研究

One relatively recent technique which has found some favor involves the inclusion of soluble trivalent antimony derivatives in the slurry during mixing.

一种比较近代的、人们好采用的技术是在混合过程中加入可溶性的三价锑衍生物。

A white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite.

一种白色三价金属元素，有时归为稀土属，见于斯堪的纳维亚钪钇石中。

The major advantages and disadvantages of trivalent chromium electroplating were introduced.

介绍了三价铬镀铬的主要优点与缺点.

In order to obtain the oxidation of trivalent arsenic mixed bacteria, the bacteria in the samples were enriched using medium containing arsenic, subculture that bacteria make then stability, and then determine arsenic tolerance and oxidation ability of three kinds of mixed bacteria.

为了获得氧化As3+的混合菌群，利用含砷的培养基对样品中的菌群进行富集，多次传代使菌群稳定，并对三种混合菌群进行砷耐受能力及氧化能力的测定。

Characteristics of the quasi-three-level solid-state laser doped with Nd3+, Yb3+, Ho3+ and Tm3+ etc. trivalent rare earth ions are compared, and their laser performances in solid-state laser configurations of rod, slab, thin disk and fiber are analyzed.

对比了掺Nd3+、Yb3+、Ho3+、Tm3+等稀土离子的准三能级固体激光的特性，分析了它们在圆棒、板条、薄片、光纤等构型的固体激光器中的工作性能。

Chromium is widely distributed in nature, organisms mainly trivalent form of chromium.

铬在自然界中广泛分布, 生物体中主要以三价铬的形式存在.

One means of accomplishing this end is to add trivalent cations to the water.

实现这一目的的一种方法是将三价阳离子加入水中.

She explains that health workers have been using what are called trivalent vaccines in some places.

她说有些地区的保健人员一直在使用所谓的三价疫苗.

experimental study on immune protection of trivalent vaccine to common bacterial diseases of pseudosciaena crocea

三联疫苗对大黄鱼常见细菌性疾病免疫保护的实验研究

The influences of other divalent ions or trivalent ions on the thermoluminescent curves are analyzed. 3.

测试了掺有不同二价或者三价离子的样品的热释光曲线，研究了不同离子对热释光峰的影响。

The history of trivalent chromium electroplating was looked back.

回顾了三价铬镀铬的历史.

" Trivalent chromium passivation shall be used unless written exception or specification update provided. "

要应用三价铬的钝化,有书面指出的例外或规格更新时除外.

Trivalent chromium in dissolved state occupies a principal position, so that ratio of trivalent chromium to total dissolved chromium is more than 80%.

三价铬对总溶解铬的比率在80%以上，所以三价铬在溶解态中占主要形态。

Trivalent chromium ( Cr3+) is an essential trace element for animals.

三价铬（Cr+3）是动物机体所必需的一种微量元素。

This is a review on trivalent Cr plating with EDTA as complexing agent.

提出了用EDTA为络合剂的三价铬镀铬新工艺。

The development history of trivalent chromium passivation for zinc plating was overviewed.

概述了镀锌三价铬钝化的发展历程.

White passivating liquor trivalent chromium for zinc plating is prepared based on a new chemical formulation.

镀锌三价铬白色钝化液是由一种新的化学配方制得.