查询词典 trace elements

Inductively coupled plasma atomic emission spectrometry was used to determine the main elements and trace elements in sphalerite.

利用电感耦合等离子体原子发射光谱法对闪锌矿中主元素与微量元素进行测定。

Microdistributions of most elements in plant, including some trace elements, which might not be acquired by most of other microanalysis technologies, were acquired in all samples in this study.

同时本文对As形态和植物体元素微区分布的分析方法进行了探索，并获得较好的研究结果，为丰富和发展相关领域的研究手段奠定了基础。

Based on the elemental composition re-sults, The behavior of REE and other trace elements within the pegmatite system is discussed, the con-centration distribution of the substitution elements in apatite to their locations in the field and to the geo-chemical characteristics of the K--feldspars.

讨论在伟晶岩系统中稀土元素和其它痕量元素的行为以及磷灰石中元素浓度分布与地理位置的关系。

After staving these samples, the authors determined and analyzed 7 kinds of trace elements in them. The authors think that the intake of amounts of all elements or one special element is different in differe...

结果表明，大熊猫在不同时期对 7种元素的总量或某一种元素的摄入都不相同，这是通过选择不同的食谱即改变食性而实现的，并由于各期有不同的生命活动所引起的。

The crustal sequence of Shexian ophiolites belongs to the transitional series behaeen calc-alkaline basalt and tholeiite and all through has similar trace elements and REE ratios and chondrite-normalized REE patterns, with high enrichment of large-ion lithophile elements and LREE.

歙县蛇绿岩壳层组合属于钙碱性和拉斑玄武岩间过渡系列，具类似的微量及稀土元素比值和稀土元素配分模型，且大离子亲石元素和LREE高度富集。

The content of major elements, such as Fe, Mg, Ca and Al, and trace elements, such as Ti, Sr, Ni, Cr and Co, is linearly correlated to that of SiO2, which suggests that the different volcanic rocks in the basin should be the product of fractional crystallization of congenetic magmas. The parental magma may be generated by the partial melting of an enriched mantle wedge formed by the metasomatism of slab-derived fluids in an active continental margin tectonic setting.

FeO、MgO、CaO、Al2O3、TiO2等主元素和Sr、Ni、Cr、Co等微量元素的含量与SiO2含量呈明显的线性相关关系，表明该区火山岩可能是同源岩浆分异的产物，岩石形成於活动大陆边缘的构造环境，并由遭受消减板块流体交代的富集地幔楔部分熔融而形成。

Guided by theory and method of unit-superunit mapping in the granite area, study the lithology, lithochemistry, trace elements, and rare earth elements, er. of the Wuzengsu gabbro body, and subdivide the body into four units.

摘要借鉴花岗岩区单元－超单元填图理论方法，通过对乌增苏辉长岩体岩石学、岩石化学、微量元素、稀土元素等特征的研究，将岩体划分为四个单元。

Based on detailed studies of petrographic characteristics and major elements of minerals, the authors analyzed trace elements of Cpx in the peridotitic xenoliths from Jining area, Inner Mongolia.

在详细岩相学特征和组成矿物主元素分析基础上，重点对内蒙古集宁玄武岩中橄榄岩包体的单斜辉石进行了激光原位微量元素研究。

In this doctoral dissertation, the modes of occurrence of about 30 elements and their combination with macerals and minerals in the coals from 10 typical coalfields in China are systematically researched by sink-float tests and petrological methods based on the investigation to the concentration distribution of trace elements in Chinese coals.

本文从分析中国煤中微量元素含量分布的基本特征出发，选择了中国10个有代表性的煤样，通过浮沉试验和煤岩分析等手段，系统地研究了中国煤中30余种微量元素的赋存状态，主要是这些元素在各种煤岩组分中的分布特征。

Geochemical study indicates that constant elements, microelements and trace elements in manganese ores and protore wholly take on thermal sedimentary characteristics, the siliceous limestone, silica-bearing limestone and bioclastic limestone is predominant protore beds of manganese-capped ores.

通过对锰矿石和矿胚层岩石中常量元素、微量元素及稀土元素等地球化学的研究，均具有热水沉积的特征，硅质灰岩、含硅质灰岩和生物碎屑灰岩是锰帽型矿石最主要的矿胚层。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。