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The Pd-Cu/C catalysts were shown to have the face centered cubic crystal structure. This could indicate that the addition of Cu shortened the Pd-Pd distances in the crystal lattice, and therefore –HO(subscript 2ads) and O-O could be better adsorbed on the surface of the catalyst. When NaBH4 was used as the reducing agent, and the atomic ratio of Pd to Cu was 3:1, the resulting catalysts had an average particle size of 3. 4nm and showed the best catalytic performance. The electrochemical active surface are a of Pd3Cu/C was 38.9m^2/gPd and the oxidation reduction reaction activity of the Pd3Cu/C catalyst was much higher than that of the Pd/C catalyst. The electrochemical activity of the Pd3Cu/C catalyst was comparable to that of a commercial Pt/C catalyst.

结果表明：催化剂中Pd与Cu的物质的量之比与预设值相近，Pd和Cu基本被全部还原；Pd-Cu/C催化剂为面心立方结构，元素铜的加入使催化剂的Pd-Pd间距缩小，从而HO(下标 2 ads)和OO键能更好地吸附在催化剂金属表面；当采用NaBH4为还原剂，Pd与Cu物质的量比为3：1时，催化剂(Pd3Cu/C)的平均粒径为3.4 nm，催化剂的催化性能最好，电化学活性表面积EAS达到38.9平方公尺/gPd，电化学性能较Pd/C催化剂有很大提高，接近Pt/C商用催化剂。

There is a core of ferric oxide inside nanoparticies. Under zetasizer ,the mean diameter of the DCIONP is 47 nm.

2结合实验的琼脂糖凝胶电泳显示，pll-DCIONP 在各种质量比均有良好的DNA 结合能力。

To study the surface treatment of the quartz glass, and the coupling of the albumin protein, we used with the fictionalization of the copolymers, and experimental conditions for protein immobilization.

蛋白质固定化之制作程序系将白蛋白固定於涂有光阻剂共聚物之石英玻璃表面，然后检测蛋白质於280 nm波长附近的吸光特性，以评估蛋白质固定化的效果。

The first order derivative transfer was carried out in the spectrum data.The first order derivative feature is analyzed.It is shown that:The vegetables can be divided into two groups according to their reflectivity during 400nm to 679nm.

研究表明，在波长400~679 nm的范围上，可以根据其反射值的高低，将蔬菜分为两组，一组为大白菜、豌豆、牛皮菜和青菜，另一组为葱、大蒜和香菜。

Result show:the solution,extracted from rat rail tendons,consist mainly of type I collagen;No growth of bacteria in 37℃ thermostatic culture box for 72 hours;Absorbing the height of ultraviolet-spectrophotometry is 230 nm by using flicker photometer examination;Amino acid in type I collagen consist of aminoacetic acid(40 per cent) and proline(14.3 per cent);Under microscope:collagen gel netted constraction consist of original collagen fibril that had been fairly well-distributed and had a quite regular striate lines ;The collagen solution prepared collagen gel matrixes in 37℃ thermostasis for culture cells and also prepared collagen solid film by washing collagen gel with a phosphate solution for plasty surgery materials.

结果：提取液主要为Ⅰ型胶原蛋白；72小时37℃恒温培养箱内培养无细菌生长；紫外分光光度计测定，吸收高峰为230nm；氨基酸成分主要为甘氨酸：占40%，脯氨酸：14.3%。显微镜下见：相互交织的胶原原纤维结构组成的网状结构；纤维均匀，有规则横纹。胶原蛋白液在37℃恒温下，可制成凝胶，用于培养细胞；用磷酸液冲洗胶原蛋白凝胶可成固体片状，制成胶原膜，用作医用材料。

The fluidization characteristics of 16 nm SiO 2 powder were investigated in a small-scale transparent column.

在内径为 35mm的小型玻璃流化床中考察了平均原生粒径为 16nm的SiO2 颗粒的流化行为。

Transparent Er3+/Yb3+ co-doped lead fluosilicate glass ceramics is prepared, which contains nano crystalline with size of 10-12 nm.

制备了微晶体尺寸大约在10-12nm范围内的Er3+，Yb3+共掺杂透明氟硅铅酸盐微晶玻璃。

Formamide was used as the background electrolyte solvent and citric acid-Tris as the electrolyte with the UV detection at 254 nm.

以甲酰胺为介质、柠檬酸-三羟甲基氨基甲烷为电解质、在254nm波长下紫外检测。

The alumina carrier has medium pore size of 25-35 nm, pore volume of 1.2-2.0 ml/g, and specific surface area 200-350 sq m/g, and is prepared through mixing ammonium aluminum carbonate and one kind of nitrogen containing compounds except acid, forming and roasting.

其中所述载体的中值孔径为25-35纳米，孔容为大于1.2至2.0毫升/克，比表面积为200-350米 2 /克，所述载体由包括将一种碳酸铝铵与一种除酸以外的含氮化合物混合、成型并焙烧的方法制备。

Author develop ELID grinding technology system, on MM7120A surface grinder and fulfilled a lots of ELID ultraprecision mirror grinding for kinds of hard and brittle materials. To use this method, the surface roughness of mechined materials can reach nanometer gade (Ra0.006～0.010 μm), and can replace parts of grind and polish technology.

本文作者开发了在MM7120A平面磨床上的ELID磨削工艺系统，实现了对多种硬脆材料的ELID精密镜面磨削试验，工件表面粗糙度可达nm级（Ra0.006-0.010μm），可取代部分硬脆材料的研磨、抛光工艺。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷