查询词典 group factor

With the occurrence of H2/Pd-C and ethyl formic ester,the reduction of the nitro group and the formylation of the amino group could be finished in one step.

但是在甲酸乙酯存在下，用H2/Pd-C对Ⅶ的硝基进行还原，得到的Ⅷ中的氨基可当即被甲酰化，使由Ⅶ到Ⅳ的两步反应一步完成。

In conclusion, the nitro group is the main toxic group for both nitrobenzenes and nitroanilines. Wrapping or reducing the nitro groups will decrease the toxicity of the subject chemicals.

总之， 硝基是这两类化合物致毒的主要基团，将硝基包覆或还原为氨基应为此类化合物解毒的重要途径。

The results indicate that the type and number of the substituents affect the toxicity of these compounds directly. A nitro group substitution increases the toxicity of the compounds, and on the contrary, an amido group substitution decreases their toxicity. For multi-nitrobenzenes, the toxicity of the o - or p -substituted nitrobenzene is bigger than that of the m -substituted one.

苯环上取代基的类型、数目和取代位置直接影响到标题化合物的毒性大小，强吸电子基如硝基会降低 Q -NO2和 E LUMO大小，使化合物毒性增强，且邻对位硝基取代的毒性高于间位取代；相反，给电子基团氨基的存在则会使化合物的毒性降低。

Nitrogen balance was positive in the EN group, but it was negative in the PN group.

此前，临床应用较多的是肠外营养支持，在取得一定效果

Each of them exhibited sensitive reduction responses of nitryls. It was found that the reduction peak of nitryl of the position 4-nitrate group of 2,4-dinitrophenol showed great difference from that of the position 5-nitrate group of 2,5-dinitrophenol. The difference between the two reduction potentials was as large as 180 mV.

在pH=5.0、0.1mol/LNaAc-HAc缓冲体系中，2，4-二硝基苯酚和2，5-二硝基苯酚在碳纳米管修饰电极上出现灵敏的硝基还原峰，其中2，4-二硝基苯酚分子中四位硝基的还原峰和2，5-二硝基苯酚分子中五位硝基的还原峰显示出明显差异，二者峰电位差达180mV。

The four fluorescence peaks are generated separately by the combined actions of the methyl parathion and the acetone. In methyl parathion molecule, there are the transition of n electrons in nitryl, the transition of π electronic structure formed by the oxygen atom and the benzene ring and the transition of n electrons in P=O group. In acetone molecule, there is the transition of n electrons in C=O group.

分析得到，四处荧光峰分别是溶剂丙酮分子中C=O上的n电子跃迁、硝基上的n电子跃迁、甲基对硫磷分子中氧原子与苯环形成的大共轭π电子结构跃迁以及P=S上的n电子跃迁共同作用产生。

However, there was no significant difference in the frequency of genotype Gly/Gly and allele Gly in NNA group, compared with control group.

然而，NNA组与对照组的基因型Gly/Gly频率和等位基因Gly频率无显著差异(P＞0.05)。

Sixty patients with NOA of were divided randomly into trail group 30 cases and control group 30 cases.

方法将60例NOA的患者随机分为治疗组30例，对照组30例。

HSBC A5N Ambassador Rory Underwood and former Scotland and current HSBC Penguin coach Frank Hadden attended today's press launch, alongside Sandy Flockhart, Group Executive Director, Chairman Commercial, Personal Banking and Insurance, HSBC Group and Nobby Mashimo, Vice President and Chairman of the Japan Rugby Football Union and ARFU delegate to the International Rugby

滙丰亚洲五国榄球赛」大使昂德伍、现任滙丰Penguin榄球队教练赫顿费克、滙丰集团执行董事、工商业务、个人理财及保险业务主席霍嘉治及日本榄球总会副主席兼会长暨国际榄球总会理事真下升一同出席2010年「滙丰亚洲五国榄球赛」的启动礼。

METHODS: A total of 264 chronic HBVinfected patients were enrolled in our study, and were divided into lowlevel HBsAg group(147 cases) and highlevel HBsAg group(117 cases) based on the HBsAg level or were divided into immune tolerance stage, immune clearance stage and nonactive stage based on the natural history. Realtime PCR and microparticle enzyme immunoassay were used to determine the content of HBV DNA and HBV M in serum samples of highlevel and lowlevel HBsAg patients, respectively, then the quantitative results were compared.

对264例慢性HBV感染者的HBsAg浓度(高浓度HBsAg组、低浓度HBsAg组)及自然史(免疫耐受期、免疫清除期、非活动期)进行分组，采用实时荧光聚合酶链反应和微粒子酶免疫试验对147例低浓度HBsA组和117例高浓度HBsAg组的血清标本进行HBV DNA和HBV M的定量测定并进行比较。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。