查询词典 a trace

Molysite is introduced into releasing agent and with the increasing sensitivity of molysite ,a method for determination of ultra trace gold in rock samples by graphite furnace atomic absorption spectrometry is introduced.

在解脱测定液中引入三价铁盐，并在其增敏下，使用石墨炉原子吸收法测定岩石样品中的超痕量金。

Even in civilized mankind faint trace of a monogamic instinct can sometimes is perceive.

即使在文明人之中，时不时也可以看出那么一丁点一夫一妻本能的痕迹。

Even i 天 n civilized man y4 kind faint trace of a monogamic instinct can sometimes is perc 个m eive.

即使在文明人之中，时不时也可以看出那么一丁点一夫一妻本能的痕迹。

ABSTRACT PZT thin films with a composition near the morphotropic phase boundary ﹝ w/w=52/48﹞ were prepared by the sol-gel process, and atomic force microscopy and spectroscopic ellipsometry were utilized to trace the sintering processes.

摘 要 用溶胶-凝胶技术制备了组成在准同型相界点﹝m/m=52/48﹞附近的钙钛矿相PZT薄膜，并运用原子力显微分析与椭偏法测试相结合的方法跟踪了薄膜的烧结过程。

Based on the remarkable sensitivity enhancement effect of Co~(2+) on Cd,a new chemical vapor generation system of Cd-KBH_(4)-NaIO_(3)-HCl was developed for the determination of trace Cd in foodstuff samples by atomic fluorescence spectrometry.

利用Co2+对镉的测定具有明显的增敏作用，采用Cd-KBH4-NaIO3-HC l新化学蒸气发生体系原子荧光光谱法测定粮食中痕量镉。

The overall appearance of these fossils reflects a shelf sedimentary environment, which fit in with the neritic sedimentary environ ment reflected by the trace element feature of the mudstone and sandstone.

遗迹化石。这些遗迹化石及浅海底栖动物化石在总体面貌上反映了陆棚沉积环境，与泥岩、砂岩的微量元素特征所指示的近岸沉积环境是一致的。

Thirdly, a multi-component form of equation(8)in reference[40]is worked out, then its Hamiltonian structure is presented byuse of the extended trace identity. Nextly, the expanding integrable model ofmulti-component integrable equation hierarchy is obtianed.

最后，将文献[40]中Liouville可积的方程族(8)式扩为多分量的形式，然后利用扩展的迹恒等式得到了该多分量方程族的HamiIton结构，接下来求出了多分量方程族的一类扩展可积模型。

A new fluorescence quenched method has been found for determination of trace of gold based on the formation of nonfluorescent ternary complex Au- TBT -APDC.The composition ratio of Au to ligandi is 1:2:2.Under the optimum conditions,the linear range of the calibration curve is from 0 to 160ng Au/ml.

本文研究了在聚乙烯醇存在下，金与曙红、吡咯啶二硫代氨基甲酸形成三元络合物的合宜条件，并据此建立了水相荧光熄灭测定痕量金的新方法。

Huadu wenquan agreggate of wenquan metres deep, well produced water temperature 63 ° c, water quality is low sodium salt and calcium carbonate, magnesium - quanshui radiopathological deversified orignate of the beneficial and trace elements of the human body, are more than thenaturaldrinking water quality of international standards, as far as experts, long-term drinking and bathing, softening, lower blood pressure vessel, regulating the nerve function, and the prevention of ccvd, osteoarthropathy and dysfuntion spirit caused by a variety of diseases.

花都温泉的温泉井深1500米，出水温度63℃，水质量属低钠盐、重碳酸钙镁型，泉水富含多种有益与人体的矿物质微量元素，均超过天然矿泉水水质的国际标准，据专家论证，长期饮用和沐浴，具有软化血管、降低血压、调节神经等功效，而且可以起到预防心脑血管疾病，骨关节病及精神功能紊乱等引起的多种疾病。

Kinetic spectrophotometric method for the determinationof trace nitrilotriacetic acid;2. To improve the yield of an Amide-type Tripodal Ligand and investigate its coordination with rare earth ion under mild condition,a series of Amide-type Tripodal Ligands(L1—L4) have been prepared by the reactions of nitrilotriacetic acid and oxalyl chloride with four kinds of amides,respectively.

为了提高酰胺型三脚架型配体的产率，进一步研究其与稀土离子的配位形式及配合物的荧光性能，以氨三乙酸为母体，草酰氯为氯化试剂，与4种胺在较温和的条件下合成了具有三脚架型结构的配体(L1—L4)，并考察了实验条件、反应温度、反应体系溶剂、缚酸剂、反应时间及催化剂对反应产率的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。