2) modes of occurrence of Se
硒赋存状态
3) Combined form
赋存形态
1.
Study the combined forms and distribution of selenium, the extraction and separation technology of macromolecule containing selenium in corn of Shuanghe of Enshi city.
研究了恩施双河产玉米中硒的赋存形态、分布及含硒大分子的提取分离技术。
2.
The combined forms and distribution of selenium,the extraction and separation technology of macromolecule containing selenium in water chestnut of Enshi city were studied.
研究了湖北恩施所购买的荸荠中硒的赋存形态、分布及含硒大分子的提取分离技术。
3.
To study the combined forms and distribution of selenium, the extraction and separation technology of macromolecule containing selenium in Scrophularia ningpoensis hemsl picked from Badong.
研究了玄参中硒的赋存形态、分布及含硒大分子的提取分离技术。
4) Speciation
[英][,spi:si:'eiʃən] [美][,spisi'eʃən]
赋存形态
1.
Heavy metal speciation in the rhizospheric soil of Pinus tabulaeformis seedlings was significantly influenced by inoculation of ectomycorrhizal fungi.
油松幼苗接种菌根盆栽试验表明,外生菌根真菌对油松根际土壤重金属铜、镉的赋存形态产生显著影响。
2.
The speciation of Cd in 24 dustfall samples from Chengdu economic region was studied by Tessier extraction method.
采用Tessier连续提取法对成都经济生态区不同区域的24个大气降尘样中镉的赋存形态进行了研究。
3.
It indicates that thallium of slag has distinct release ability in the process of natural leaching, thallium speciation is an inherent and chief factor, and the pH conditions of slag and its mineral composition are the exterior and subordinate factors.
研究表明:自然淋滤作用下,沉灰渣中Tl污染物的迁移释放能力很强;沉灰渣中Tl的赋存形态是控制其迁移释放能力大小的内在因素和首要因素,而淋滤液pH和沉灰渣矿物组成是控制沉灰渣中Tl迁移释放能力大小的外在因素和次要因素。
5) chemical speciation
赋存形态
1.
A review with 39 references is given on the study on cadmium and chemical speciation of cadmium in soil including chemical speciation of cadmium in soil,the influence of soil character to chemical speciation of cadmium,the determination method of cadmium in soil and so on.
综述了土壤中镉及镉的赋存形态研究进展,包括:土壤环境中镉及其污染来源,土壤中镉的赋存形态,镉赋存状态同镉生物活性的关系,土壤性状对镉赋存形态的影响,土壤中镉的测定方法等。
2.
The chemical speciation of heavy metals(Cu,Zn,Ni,Cr,Mn,Co,Fe,V,Pb) in surface sediments from Quanzhou Bay were determined using the modified BCR-four step sequential extraction procedure,proposed by the European Community Bureau of Reference(BCR).
用改进的BCR四步连续提取法,分析泉州湾潮间带表层沉积物中9种重金属的赋存形态。
3.
A sequential extraction procedure was employed to study the chemical speciations of heavy metals in 6 selected surface sediments from Xiamen Western Harbor.
采用逐级浸出法对厦门西海域6个表层沉积物样品中重金属(Cd、Cr、Cu、Ni、Pb、Zn)的赋存形态进行分析。
6) form
[英][fɔ:m] [美][fɔrm]
赋存形态
1.
Study on Nitrogen Forms in Chaohu Lake and Wabu Lake Sediments;
巢湖·瓦埠湖沉积物中氮赋存形态研究
2.
The Studies on the Adsorptive-desorptive Behaviour of Arsenic in Brown Soil and Its Form Distribution
砷在棕壤中的吸附解吸行为及赋存形态研究
3.
Fluorine, one of the necessary trace elements of human beings is presented in the forms of inorganic and organic compounds in foods, such as sodium fluoride, silicon fluoride, and fluoroacetate etc.
文中阐述了食品中氟的赋存形态及其分析方法,研究了灰化、碱熔、微量扩散、氧瓶燃烧、酸浸提及高温燃烧水解等前处理方法提取氟的形态差异,并对食品中氟的分析提出了建议。
补充资料：海水中元素的赋存形式
海水中元素的赋存形式
species of elements in sea water
haishuizhong yuansu defueun xingshi海水中元素的赋存形式(speeie。of elelllellt、in seawater)某种元素存在于海水中的物理和化学形态。至今，一般的海水化学调查往往只局限于测定元素在海水中总的含量，这是远远不够的，因为要想开发和利用海水化学资源，就必须了解这些元素在海水中的存在形态，以便采取适当的方法加以提取。 占海水中可溶盐类99%以上的8种主要阳、阴离子即Na+、K+、M才十、Caz+、Cl一、Hc衡、c诱一、和洲一，除了以自由离子形式存在外，还有相当程度是以离子对形式存在的(CI一属例外，它不与任何主要阳离子形成离子对)。表中列出了这些海水主要成分的形态分布。 某些海水主要成分的形态分布离子浓度(md/l)自由离子(%)硫酸盐(%)碳酸氢盐(%)碳酸盐(%)CaZ+0 .010 4 91 8 1 0.2M扩十0 .054 0 87 11 1 0.3Na+ 0 .475 2 99 1.2 0.田1一K+0.0100 991一一 自由离子(%)钙盐(%)镁盐(%)钠盐(%)钾盐(%)S暖一0 .028 4 54 3 21.5 210乃H(:呀0.朋2 38 69 4 198一c咪一住。刃269 9 7 6717一 对于海水中大多数微量和痕量元素，除表已列出它们在海水中存在的主要化学形态外，它们还可以自由离子、水合离子、无机络合物、有机络合物及鳌合物，以及与高分子量有机物结合等形式存在于可溶态。另外，按其在海水中形成的粒径大小，有的自身形成胶体颗粒，或以一定形式吸附在胶体颗粒上(胶态)，有的形成沉淀物，矿物颗粒，有机颗粒以及存在于活的生物体或死的生物残骸中(悬浮态)。了解元素在海水中的赋存形式，对于掌握它们在海水中的化学性质、迁移变化规律，以解决如何在海水中利用和提取这些元素是十分必要的。 (余国辉)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条