查询词典 ni

The formation and morphology of filamentous carbon were clearly related to the size of Ni particles.

丝状碳的形成及其形貌与金属Ni颗粒的大小有着密切的联系。

Amorphous alloys represent a variety of special materials with short-range ordering while long-range disordering structure which may provide pathways to the excellent catalytic properties, i.e., good anti-poisoning ability, the higher catalytic activity and selectivity in homogeneous hydrogenation of a,p-unsaturated aldehyde, the low and even none environment pollutionUp to now, in hydrogenation of furfural to furfuryl alcohol, the most commonly used catalysts are Cu-Cr dopant Cu-Cr, and Raney Ni et al.

目前，在糠醛催化加氢反应中所用的催化剂主要有Cu-Cr和修饰的Cu-Cr以及Raney Ni等，Cu-Cr催化剂毒性较高，对环境构成严重的危害，而且易阻塞反应器。

In the paper, it was reported thatα-Furoic acid was synthesized with the electrooxidation ofα-furfural at the Ni electrode in the NaOH solution.

报道了在NaOH溶液中，以α-呋喃甲醛为原料，在Ni电极上直接电氧化制备α-呋喃甲酸。

The hydrogenation and methyl esterification of furoic acid over Pd-Ni/γ-Al2O3 catalysts was investigated in fixed bed micro-reactor under different conditions such as reaction temperature,pressure,H2 space velocity,space velocity of furoic acid and methol,ratio of H2 and furoic acid and so on.

以糠酸、甲醇、氢气为原料，采用连续流动固定床微反应器，Pd-Ni/γ-Al2O3为催化剂，使糠酸一步加氢甲酯化生成α-四氢糠酸甲酯。

The hydrogenation and methyl esterification of furoic acid over Pd-Ni/γ-Al2O3 catalysts was investigated in fixed bed micro-reactor under different conditions such as reaction temperature,pressure,H2 space velocity,space velocity of furoic acid and methol,ratio of H2 and furoic acid and so on.

以糠酸、甲醇、氢气为原料，采用连续流动固定床微反应器，Pd-Ni/γ-Al2O3为催化剂，使糠酸一步加氢甲酯化生成α-四氢糠酸甲酯。研究了反应的温度，压力，气、液体流速，进料流量等因素对催化反应的影响。结果表明：在1.5MPa，250℃，氢气空速3300 h-1，液体空速3.0 h-1(氢油比为50)时，糠酸转化率为96.6%，四氢糠酸甲酯的选择性97.2.0%，产率94.0%。催化剂稳定性较好，连续运转280小时后未见活性下降。该反应体系活性高，选择性好，反应压力低，催化剂性能稳定，操作简单，产物易分离

The results reveral that a lower La/Ni ratio of the catalysts sould lead to a wider diameter distribution and a higher degree of graphitic nature.

实验结果表明不同催化剂前驱中的La/Ni比会影响碳纳米管的管径分布和石墨化程度。

Mixing enthalpy, mixing entropy, changes of Gibbs free energy and critical cooling rate R were studied and calculated in Cu-Ti-Zr-Nb-Ni-Si hexahydric alloys.

分析计算了Cu-Ti-Zr-Nb-Ni-Si六元合金系的混合洽、混合熵、体系自由能的变化和临界冷却速率R

Methods The effects of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine and 7-nitroindazole (7-NI) on nitric oxide synthase activity, levels of dopamine、3,4-dihydroxyphenylacetic acid、homovanillic acid, and TH-immunostained postive nerve fibres in the striatum of mice were determined by using colorimetic analysis, HPLC with electrochemical detection, and immunohistochemical analysis.

用比色分析、高效液相色谱电化学及免疫组化法检测1-甲基-4-苯基-四氢吡啶和7-硝基吲唑（7-NI）对C57BL小鼠纹状体一氧化氮合酶活性，多巴胺、二羟基苯乙酸、高香草酸水平和酪氨酸羟化酶免疫阳性神经纤维的影响。

These processes resulted i n the formation of peculiar dunites in the hyperbasite complexes ,development of low-sulfide horizons and hortonolite dunites in the basite-hyp erbasite layered intrusions (platinum-group metal deposits),and specific proces ses of transmagmatic sulfurization of the iron-rich igneous differentiates (Cu -Ni sulfide and Cu-Zn-Pb sulfide ores).

这些作用导致产在超基性杂岩中的特殊纯橄榄岩、基性超基性层状侵入体中的低硫层和铁镁橄榄石纯橄榄岩的形成，以及富铁火成分异岩的透岩浆硫化作用(Cu-Ni硫化物和Cu-Zn-Pb硫化物矿石)。

The compositions of organic carbon, fulvic acid, humic acid and humin in stream sediments were analyzed, and the distribution characteristics of Cu, Pb, Zn, Ag, Sb, Mn, Mo, Ni, As and Hg in fulvic acid and humic acid were investigated.

水系沉积物是森林沼泽区的主要表生介质之一，对其中的有机碳、胡敏酸、富里酸和胡敏素分布状况以及富里酸相和胡敏酸相Cu、Pb、Zn、Ag、Sb、Mn、Mo、Ni、As、Hg的分布特征进行了研究。

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