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In this paper, a total of 56 relatively nonpoint source pollution sediment samples were collected from the tidal flats of the Jiuduansha shoal and the Chongming island of the Yangtze river estuary. The main properties i. e., grain size distribution, contents of DCB (dithionite citrate bicarbonate extracted iron Fe(subscript d, AAO extracted iron Fe(subscript o, total Fe, DCB extracted Mn Mn(subscript d, total Mn, organic matter, magnetic susceptibility of the samples, as well as the concentrations of Cu, Zn, Pb, Cr, Cd and Ni in the samples, were determined. Basing on the data, the relation of the sediment properties to heavy metal concentrations was evaluated with pearson's rank and partial rank correlation analysis.

采集长江口无明显点源污染的崇明东滩和九段沙潮滩56个沉积物样品，测定沉积物原样和粘粒中Cu，Zn，Pb，Cr，Cd和Ni的含量以及沉积物的主要性状（粒径分布、游离铁、活性铁、总铁、游离锰、总锰、有机碳和磁化率等），以相关分析和偏相关分析研究沉积物中重金属含量与沉积物主要性质之间的关系。

Stress concentration zones and the maximum value of thermal stress of the TiC cermet/iron joint brazed with Ag-Cu-Zn filler metal during cooling were studied in this paper.

本文研究了采用Ag-Cu-Zn钎料在1173K温度下钎焊TiC金属陶瓷与铸铁挺柱实际件时，在冷却过程中接头处的应力集中区和热应力最大值。

Ag, Zn, Pb in dark brown soil in koraien pine and larch stands were analyzed, and the relationship between soil elements and forest site factors, such as elevation, slope, aspect, position, litter, soil depth and gravel content, were researched by the method of statistics analysis.

化学元素P、Ca、K、Mg、Mn、Cu、Ni、Ag、Zn和Pb的含量在红松、落叶松林下土壤中有显著差异，本文应用统计分析方法研究了这些化学元素与立地因子之间的关系。

Results show that as a whole the region is quite good in soil environment quality, except for Wushan and Fengjie districts, where high Cr and Ni background values have led to existence of a certain area of Grade Ⅱ soils. Over 90% of the soils are in Grade Ⅰ in terms of As, Cu, Hg, Pb and Zn. Artificial pollution is local and limited in area. For instance, spots of Hg pollution are found only in the vicinity of residential settlements, factories and minings.

结果表明：三峡库区区域土壤环境质量总体上较好，除巫山、奉节地区Cr、Ni自然高背景导致存在一定量的区域性二类土外，表层土壤中As、Cu、Hg、Pb、Zn等元素一类土占全区面积均在90%以上，仅存在局部性人为污染，如Hg在城镇、厂矿等地的点状污染；不存在区域性的人为污染。

The process uses a Zn+5wt%Al galvanizing bath containing rare earths from an addition of 0.01 to 0.2% mischmetal.

本文围绕稀土在Galfan（Zn+5%Al）镀层中的作用进行了一些有关的基础研究。

Chapter 2: Four sulfur-containing D-glucosamine metal complexes have been synthesized M-GLUS,M = Co, Cu, Ni, Zn）and characterized by elementary analysis, molar conductance, and proton nuclear magnetic resonance.

第二章：合成了四种含硫氨基葡萄糖金属配合物（M-GLUS，M = Co， Cu， Ni， Zn），利用元素分析，摩尔电导，核磁共振氢谱进行了结构表征，结果表明含硫配体与这四种二价金属离子均形成了2：1型非电解质配合物。

A novel ligand, N, N'-bis (2-hydroxy-1-naphthylidene)-3-oxa-1, 5-diaminopentane , and its Zn , Ni , Co , Cu complex were synthesized. The compositions and structures of the ligand and its complexes were characterized by elemental analyses, MS , IR spectra, DTA-TG and molar conductivity.

合成了含萘酚环Schiff碱开链冠醚配体H〓L〓（N，N'-双-二甘醇二胺）及其过渡金属(Zn、Ni、Co、Cu)配合物，通过元素分析、质谱、红外光谱、摩尔电导对配体及配合物的组成、结构进行了详细的表征，对配体和配合物的溶液和固体荧光性质进行了研究。

Compared with the original powder, the content of Si in the three troches increased by 8.09, 14.68, 12.64 times respectively. Accordingly, they were added with a little amount of silica gel. The content of trace element such as Ca, Fe, Zn in sample 4 have optimized clearly.

结果表明：3种片剂中均添加了部分晶体乳糖；根据3种片剂中Si含量比原粉的Si平均值分别增加了8.09、14.68、12.64倍的差异，可知片剂中均添加了微量的硅胶；样品4中微量元素Ca、Fe、Zn的含量明显优化。

The results showed that Acidithiobacillus ferrooxidans could effectively solubilise realgar and 16.3% arsenic dissolution could be achieved in 30 days under the conditions of pH 1.8 in Iron free 9 K medium (with additional 1.0g of ferrous iron per liter and 0.5% of realgar), 150 rpm, 30°C. The trace elements of Zn, Cu, Mg, Mn, Fe and Se et al. could also be effectively leached.

实验结果表明，氧化亚铁硫杆菌能够有效溶解雄黄中不溶性的硫化砷，30 ℃，pH1.8，以20%接种量接种驯化后的氧化亚铁硫杆菌BY-3条件下135r/min摇瓶浸出30天砷的溶出率可达16.3%，Zn、Cu、Mg、Mn、Fe、Se等有益微量元素都能够得到有效浸出。

Mn-Zn ferrite nanocrystalline was prepared by solgel auto-combustion process,and the technics was analyzed by means of TG-DTA, FT-IR and XRD.

用溶胶-凝胶自燃烧法制备了 Mn-Zn铁氧体纳米晶体，用TG-DTA，FT-IR和XRD等3种分析方法研究了其制备工艺。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。