trace elements

trace elements的基本解释

n.

痕量元素, 微量元素( trace element的名词复数 )

与trace elements相关的网络例句 [注：此内容来源于网络，仅供参考]

The results revealed that there were rich trace elements in female silkworm moth, the total contents and essential macro elements of 10 familiar trace elements were 27339.30 mg/kg and 26900.00 mg/kg, respectively. The contents of 4 kinds of trace elements which are needed more in human beings were higher in silkworm moth than that in the important Chinese traditional medical insect moth, insects belonging to Meloidae. The content was also in agreement with human daily requirement.

家蚕雌蛾体富含微量元素，检测的10种常见微量元素的加和量和人体必需宏量元素含量分别为27339.30mg/kg和26900.00mg/kg，其中人体需要量较大的4种微量元素含量高于重要中药资源昆虫芫菁科昆虫蛾体中的含量，并且适合于人体日需要量。

By using AAS and XRF, the contents of Cr, Pb, Mn, As, Se, Hg, Cd, Zn in raw coal, bottom ash and fly ashes are measured quantitatively in a 220 t/h pulverized coal boiler. Factors affecting the distribution of trace elements are investigated, including fly ash diameter, furnace temperature, oxygen content and trace elements' characters. The coefficient of Meij is also improved to more directly show element enrichment in combustion products. Elements may be classified into three groups according to volatility features of trace elements.

采用原子吸收分光光度计和X射线荧光光谱仪，定量测定了电厂煤粉炉中原煤、底渣、飞灰中Cr、Pb、Mn、As、Se、Hg、Cd、Zn等微量元素的含量，分析了飞灰粒径、炉膛温度、炉内含氧量、微量元素自身性质对微量元素赋存、挥发特性的影响，并根据元素的挥发特性将元素进行分类，得出表征微量元素排放特性的3种数值，并与我国和欧盟垃圾焚烧微量元索排放标准相对照。

Interlayer oxidized zone can be divided accurately by Fe_2O_3, Fe_2O_3/FeO and U parameters. We can correct the field macroscopic color zoning by combining the macroscopic zoning and microscopic zoning. Univalent major elements components(Al_2O_3, SiO_2, K_2O, Na_2O) show remarkable activity at the process of interlayer oxidizing, their contents are variable and mingled in different zones and it can't be used in zoning. But we can speculate the developmental degree of interlayer oxidized zone and uranium mineralization according to the concentration trends and variation characteristics of sensitivity group, activity group and their ratios .(3)The comparatively steady elements such as lithiphile elements, sulfophile elements and high field strength elements change regularly at the process of interlayer oxidation except some radioactive elements. Trace elements and rare earth elements commonly enrich in thin rock clast such as mudstone, in which the enriched elements species are more than those in the whole rock, which indicate that the regeneration action in caulking matter are more deep than that in whole rock at the process of interlayer oxidation, and the reallocate intention of trace elements in main minerlized rock in Tuha basin are more intensive than that in Yili basin at the process of deposition ,diagenesis and later changes .

根据化学蚀变参数PC值和分离迁移位等将常量元素组分分为敏感组分组、活动组分组、次活动组分组和惰性组分组，不同组分可分别用于讨论层间氧化带低温地球化学中不同问题；敏感组分(变价元素组分Fe_2O_3、FeO)和U在层间氧化带中迁移富集规律明显，Fe_2O_3／FeOFe~(3+／Fe~(2+)比值具分带判别能力，配合U含量对层间氧化带进行较准确的分带，可克服野外宏观颜色分带偏差：提出Fe~(3+)／Fe~(2+)分带判别值在不同盆地、不同地段不同，除受氧化作用控制外，流体酸碱度不同也是重要因素的观点，对找矿实践有实际指导意义；活动组分(Al_2O_3、SiO_2、K_2O、Na_2O)在层间氧化作用过程中具有较明显的活动性，其含量值变化跳跃，在不同分带相互交织，不具分带指示意义；但利用敏感组分、活动组分及其比值在层间氧化带中的变化特征可推测层间氧化带发育的完善程度及其含矿性；次活动组分组(CaO、MgO、MnO_2)含量低，变化规律性差；惰性组分组(TiO_2、P_2O_5)含量低，活动稳定，可用来反映沉积物源特征。

与trace elements相关的网络解释 [注：此内容来源于网络，仅供参考]

Trace elements：痕量元素

食物叶酸的平均生物利用率为50%,叶酸补充剂与膳食叶酸混合时的生物利用率为85%,相当于膳食叶酸的1.7倍,以此膳食叶酸当量(DFE)的计算公式为:凡是在人体中质量分数小于0.01%者为微量元素(micro elements)或称为痕量元素(trace elements),如铁、锌、铜、锰

Trace elements：微量元素

各位常常听到微量元素(Trace elements)一词,它们其实是矿物质. 又有一样东西叫巨量元素(major element或major minerals),也是矿物质. 分别是有关的动物、植物需要大量的,就叫巨量元素. 需求很少量的当然称为微量元素. 以人体为例,

Trace elements：痕[微]量元素

toxicology 毒物学 | trace elements 痕[微]量元素 | tracers 示踪物,同位素检查器