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the orientation
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  取向
     ON THE ORIENTATION RELATIONSHIP BETWEEN TRANSFORMATION PRODUCT AND PARENT PHASE
     相变产物与母相晶粒间取向关系的理论分析
短句来源
     THE ORIENTATION STRUCTURE OF UNIAXIALLY STRETCHED POLYVINYLIDENE FLUORIDE
     单向拉伸聚偏氟乙烯的取向结构
短句来源
     Study of the orientation of molecules DASPI and PIC adsorbed on an optical surface
     由光学表面上吸附分子的二次谐波研究DASPI和PIC分子的取向
短句来源
     RDF Study of the Orientation Structure of Polymeric Films
     RDF法研究聚合物薄膜取向结构
短句来源
     The Chemistry of α-Oxo Ketene Cyclic Dithioacetals( X ) --Studies on the Orientation of Acid Catalyzed Reaction to the Adducts of α-Oxo Ketene Cyclic Dithioacetals with Allyl Grignard Reagents
     α-羰基烯酮环二硫代缩醛化学(Ⅹ)——β,β-1,5-亚丙二硫基-α,β-不饱和酮与烯丙基Grignard试剂加成物的酸催化反应取向研究
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  丝取向
     Study on the Orientation Structure and Thoeretical Model of Pan Precursor and Preoxidized Fiber
     聚丙烯腈基碳纤维原丝、预氧丝取向结构及理论模型研究
短句来源
     The study on the orientation structure and the mechanical properties of the preoxidized PAN-based carbon fiber
     聚丙烯睛基炭纤维预氧丝取向结构与力学性能研究
     The orientation factor of PAN precursor drawn at different ratios coincided with the theoretical curves of Crawford and Kolsky orientation model.
     不同拉伸比的PAN原丝取向系数与Crawford和Kolsky取向模型的理论曲线比较吻合。
短句来源
     were kept constant. The results indicated that as the draw ratio increased, both themechanical properties and the orientation degree of PAN precursor has been improved.
     研究结果表明:纺丝成型过程中,随着牵伸倍率的增大PAN原丝的取向程度有明显提高,其力学性能得到明显改善,但是当牵伸倍率大于8时,原丝取向度的增加变缓,确定拉伸比在6~8范围内较佳。
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  “the orientation”译为未确定词的双语例句
     The Orientation of English Modal Auxiliary Verbs
     英语情态动词“指向”问题初探
短句来源
     WHAT IS THE ORIENTATION OF ARCHITECTURE?——A Brief Introduction of the Seminar on Architecture and Urban Planning in Finland
     建筑向何处去?——简介芬兰建筑与城市规划讲习会
短句来源
     THE MEASUREMENT OF THE ORIENTATION ANGLE OF MOVINC TARGET BY REAL TIME LASER SPECKLE INTERFERENCE
     用激光散斑实时干涉法测量运动目标方位
短句来源
     Applied Anatomy on the Orientation of the Structures in Surgery of Posterior Cranial Fossa
     颅后窝手术中结构定位的应用解剖学
短句来源
     STRESS MEASUREMENTS IN DEEP BOREHOLES IN THE BOHAI COASTAL AREA OF SHANDONG PROVINCE:DETERMINATION OF THE ORIENTATION OF THE PRINCIPAL STRESS
     山东渤海沿岸地区深部应力测量——主应力方向的测定
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  the orientation
In order to analyze the relationship between two coordinate systems, which is attached respectively to the diving spherical gear and the driven spherical gear, the orientation cosine matrix method is utilized.
      
The wrist of the robot including a specially designed link mechanism can maintain the position of the spraying point on the surface of the master pattern whatever the orientation of the gun.
      
Introduced were the functions of influence of the basic control on the dynamics of the autonomous models of isolated flexible modes that underlie the fuzzy characteristics of the orientation system.
      
For the developing structure, the structural diagrams of the orientation systems realizing the accepted control strategies at the corresponding stages of assembling were presented.
      
The direction of the observed changes in the orientation and exploratory behavior of anosmic animals was different.
      
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The absorption spectra of cadmium sulphide single crystals were observed with natural light and polarized light, one piece of the crystals having a thickness of about 0.1 mm and another about 0.05 mm. At room and liquid air temperatures, the absorption spectra observed with natural light indicate that the wavelength of the long wavelength limit of Cd S depends upon the thickness and the temperature of the crystals. A change of the wavelength of the absorption edge which depended upon the orientation of...

The absorption spectra of cadmium sulphide single crystals were observed with natural light and polarized light, one piece of the crystals having a thickness of about 0.1 mm and another about 0.05 mm. At room and liquid air temperatures, the absorption spectra observed with natural light indicate that the wavelength of the long wavelength limit of Cd S depends upon the thickness and the temperature of the crystals. A change of the wavelength of the absorption edge which depended upon the orientation of the electric vector of the polarized light produced by a polaroid plate placed between the crystal and the slit of the spectrograph was observed.

利用CdS单晶体,一块约厚0.1毫米,另一块约厚0.05毫米,观察它们在天然光及偏振光下的吸收光谱。在室温及液态空气温度下,天然光的吸收指示CdS晶体长波吸收边波长随厚度及温度而改变。在光谱仪狭缝前放一偏振片观察到长波吸收边波长随晶体C轴与偏振光电矢量间介角的改变。 在液态空气温度下观察CdS晶体对偏振光的吸收情况,发现在晶体本徵吸收边出现由七条强而锐的谱线组成的一个类氢光谱系。 测量结果发现每条谱线的波数满足下列公式: v_k=20270-11754/k~2(厘米)~(-1),式内k=3,4,5,…9;k=2的线未在光谱中发现。从此式推出的CdS晶体能级的系限加以温度较正为2.41电子伏,与前人用其他方法所得2.42电子伏是很相近的。激子的等价质量与电子质量之比为4.3。 CdS晶体与ZnS晶体结构相似,常数数值相近,由此可以猜测CdS晶体能级的满带可能是属于S-离子。所观察到的激子光谱类氢系可能是S-离子的激发态。

This paper deals with the synthesis of 3-[o-dichloro (or monochloro-) acetamino-p-nitro-plenyl]-propanol (Ⅱ or Ⅱa),structurally varying from chloramphenicol on the one hand by shif-ting the dichloroacetamino group from the aliphatic side-chain to aromatic ring and replacing thesecondary hydroxyl group by hydrogen on the other,for the purpose of investigating the relationbetween biological action and chemical constitution of the antibiotic.The resulting compoundsshowed no inhibiting effect against E.coli,S.thphosa,S.paratyphi...

This paper deals with the synthesis of 3-[o-dichloro (or monochloro-) acetamino-p-nitro-plenyl]-propanol (Ⅱ or Ⅱa),structurally varying from chloramphenicol on the one hand by shif-ting the dichloroacetamino group from the aliphatic side-chain to aromatic ring and replacing thesecondary hydroxyl group by hydrogen on the other,for the purpose of investigating the relationbetween biological action and chemical constitution of the antibiotic.The resulting compoundsshowed no inhibiting effect against E.coli,S.thphosa,S.paratyphi A and B.staphylococcusaureus,and B.subtilis.The compounds Ⅱ and Ⅱa were prepared by a 4-step synthesis starting from o-nitrocin-namyl alcohol (Ⅵ),which upon hydrogenation in the presence of Raney-nickel catalyst led tothe formation of 3-(o-aminophenyl)-propanol (Ⅶ),m.p.65°.By nitrating the latter with amixture of HNO_3 and H_2SO_4,there was formed 3-(o-amino-p-nitrophenyl)-propyl hydrogen sul-phate (Ⅷ),m.p.203°(decomp.); which on subsequent hydrolysis with dilute mineral acidgave the desired product 3-(o-amino-p-nitrophenyl)-propanol (Ⅸ),m.p.90°.In order toestablish the orientation of the nitro group,this compound was converted into its N,O-diacetylderivative (Ⅹ),m.p.128°,which on oxidation with potassium permanganate gave the knowno-acetamino-p-nitrobenzoic acid (Ⅺ).Finally,the compounds Ⅱ,m.p.132°,and Ⅱa,m.p.118°,were obtained by chloroacetylation with an appropriate acid chloride.Direct hydrogenation of o-nitrocinnamaldehyde (Ⅻ) in the presence of Raney-nickel catalystgave rise to 1,2,3,4-tetrahydroquinoline (ⅩⅢ).

本文报告合成氯霉素相似化合物3-[隣二氯(或一氯)乙醯氨基-对硝基苯基]-丙醇。此等化合物对大肠杆菌,伤寒杆菌,副伤寒甲及乙杆菌,金色葡萄球菌及枯草杆菌等细菌均不现抑制作用。说明氯霉素分子上的二氯乙醯氨基从脂肪炼上移至芳香环的相邻位置上,以及仲醇羟基以氢代替后则原有的抗生作用即消失。

2-Bromo-2, 3-dimethylbutane decomposes when treated with phenylmagnesium bromide and cobaltous bromide to give 2, 3-dimethylbutane (35%), 2, 3-dimethylbutene-1 (31%) and 2, 3-dimethylbutene-2 (ca. 2%).1-Chloro-1-methylcyclohexane decomposes when treated with methylmagnesium bromide or isopropylmagnesium bromide and cobaltous bromide to give mainly a mixture of methylcyclohexane, 1-methylcyclohexene and methylenecyclohexane. A small amount of a high-boiling product, probably a dimer, was also obtained. In the...

2-Bromo-2, 3-dimethylbutane decomposes when treated with phenylmagnesium bromide and cobaltous bromide to give 2, 3-dimethylbutane (35%), 2, 3-dimethylbutene-1 (31%) and 2, 3-dimethylbutene-2 (ca. 2%).1-Chloro-1-methylcyclohexane decomposes when treated with methylmagnesium bromide or isopropylmagnesium bromide and cobaltous bromide to give mainly a mixture of methylcyclohexane, 1-methylcyclohexene and methylenecyclohexane. A small amount of a high-boiling product, probably a dimer, was also obtained. In the unsaturated monomeric fraction considerable amount of methylenecyclohexane was found.Upon treatment with base 2-bromo-2, 3-dimethylbutane yields an olefinic mixture, which consists of 79% of 2, 3-dimethylbutene-2 and 21% of 2, 3-dimethylbutene-1, and 1-chloro-1-methylcyclohexane yields only 1-methylcyclohexene.It is suggested that the disproportionation of alkyl radicals in solution is probably a bimolecular reaction and the number of α-hydrogen atoms has a directive influence upon the orientation of olefin formation.

由2-溴代-2,3-二甲基丁烷与溴化苯基鎂在二溴化鈷存在時所起的反應得到如下產物:2,3-二甲基丁烷(35%),2,3-二甲基丁烯-1(31%)及2,3-二甲基丁烯-2(約2%)。由1-氯代-1-甲基環己烷同溴化甲基鎂或溴化異丙基鎂在二溴化鈷存在時的反應得到甲基環己烷,1-甲基環己烯及次甲基環己烷的混合物。此外,還得到少量的高沸點產物,大概为一雙聚合物。在不飽和的單體中,有相當一部分为次甲基環己烷。用鹼處理2-溴代-2,3-二甲基丁烷所得到的烯烴中合有79%的2,3-二甲基丁烯-2和21%的2,3-二甲基丁烯-1。1-氯代-1-甲基環己烷與鹼起消除作用時則只生成1-甲基環己烯。自由烷基在液相中的歧化作用可能为一雙分子反應,烷基分子中的α-碳原子土所具有的氫原子的數目對於烧烴形成的定向表現一定的影響。

 
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