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  and di
     NMR STUDY ON THE CONFORMATION CHANGE IN THE AGGREGATION PROCESSES OF 1,3-DI(α-NAPHTHYL)PROPANE AND DI(α-NAPHTHYLMETHYL)ETHER
     NMR STUDY ON THE CONFORMATION CHANGE IN THE AGGREGATION PROCESSES OF 1,3-DI(α-NAPHTHYL)PROPANE AND DI(α-NAPHTHYLMETHYL)ETHER
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  “and di”译为未确定词的双语例句
     DD of ACE genotype showed a positive correlation(OR=1.821,P< 0.05) and DI showed a negative correlation with the disease(OR=0.491,P< 0.05).
     血管紧张素转换酶的DD基因型与疾病成正关联(OR=1.821,P<0.05),DI基因型与疾病成负关联(OR=0.491,P<0.05)。
短句来源
     [Result] Among the control group,Genotype DD,II and DI were respectively 21.0%,29.2% and 49.8%;
     结果219例健康对照中,DD型占21.0%,II型占29.2%,DI型占49.8%。
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     Relationship between Recurrence and Metastasis of Gastric Cancer and Expression of EGFR,IL-6R,PCNA,and DI
     EGFR、IL-6R、PCNA表达及DI与胃癌复发转移的关系
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     ②In ACE genotypes, DD frequency was significantly increased(Z=2.503,P< 0.05) and DI frequency was remarkably decreased(Z=2.522,P< 0.05) in the study group.
     ②血管紧张素转换酶基因DD型频率在疾病组中显著性增多(Z=2.503,P<0.05),DI型频率在疾病组中显著性减少(Z=2.522,P<0.05)。
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     47.4±9.2,37.2±6.4,and 27.0±6.6nmol/(ml·min),for DD( n =16),and DI( n =45),and II( n =41) genotype in LN group;
     LN患者中DD基因型、DI型和II型血清ACE活性分别为47.4±9.2、37.2±6.4、27.0±6.6nmol/(ml·min)。
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     Di.
     Di.
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     DI-ring
     DI—环
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     The Relationship between Di and Tian
     帝、天关系的演变
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     XU Di-shan and the Religion
     许地山与宗教
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  and di
The main products of the reaction of hypochlorite with 1-stearoyl-2-oleoyl-sn-glycero-3-phosphocholine were mono and di chlorohydrins of linoleic acid.
      
It was shown that the viscosity increases significantly with an increase in the ratio of sodium hydroxide and di-2-ethyhexyl phosphoric acid molar concentrations from 0.6 to 1.0.
      
Pulsed NMR and X-ray diffraction analysis are employed to study the influence of adsorbed toluene, p-xylene, acetone, and di(ethylene glycol) (DEG) molecules on phase transitions in a ZSM-5 silicalite.
      
Pulsed NMR and X-ray diffraction analysis are employed to study the influence of adsorbed toluene, p-xylene, acetone, and di(ethylene glycol) (DEG) molecules on phase transitions in a ZSM-5 silicalite.
      
This approach was used for the separation of the homologues of polycyclic aromatic compounds and di-n-alkyl phthalates on monolithic porous silica gel Chromolith (Merck, Germany) with modifying octadecyl radicals by reversed-phase HPLC.
      
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Methylchlorosilanes were successfully chlorinated with sulfuryl chloride, when azo-bis-isobuty-ronitrile was used as free radical initiator, giving the corresponding monochlorinated products. The rate of reaction decreased when more Si-Cl bonds were present in the silane to be chlorinated. Increasing the quantity of the initiator increased the rate of reaction.Trimethylchloromethylsilane was also chlorinated with sulfuryl chloride and benzoyl peroxide, both dichloromethyltrimethylsilane and di(chloromethyl)dimethylsilane...

Methylchlorosilanes were successfully chlorinated with sulfuryl chloride, when azo-bis-isobuty-ronitrile was used as free radical initiator, giving the corresponding monochlorinated products. The rate of reaction decreased when more Si-Cl bonds were present in the silane to be chlorinated. Increasing the quantity of the initiator increased the rate of reaction.Trimethylchloromethylsilane was also chlorinated with sulfuryl chloride and benzoyl peroxide, both dichloromethyltrimethylsilane and di(chloromethyl)dimethylsilane were simultaneously obtained.

甲基氯矽烷可以在偶氮雙異丁腈的引發作用下,用氯化硫醯進行氯化反應,得到相應的單氯化產物。反應進行速度随着被氯化的矽烷中所合之矽氯鍵增多而減慢。增加引發劑的份量可以增加反應速度。三甲基氯甲基矽烷可以用氯化硫醯與過氧化苯甲醯進行氯化,得三甲基(二氯甲基)矽烷和二甲基二(氯甲基)矽烷。

(1) Eight dialkylphosphites (I), including, dimethyl-, diethyl-, di-n-propyl-,di-iso-propyl-, di-n-butyl-, di-iso-butyl-, di-sec-butyl-, and di-n-amyl- phosphite,reacted with aniline in the presence of carbon tetrachloride and a tertiary baseto form the corresponding dialkylanilinophosphonates (II). It was found thatthe reaction became increasingly difficult for the dialkylphosphites in thefollowing order: dimethyl-, diethyl-, di-n-propyl-, di-n-butyl-, di-n-amyl-,di-iso-butyl-,...

(1) Eight dialkylphosphites (I), including, dimethyl-, diethyl-, di-n-propyl-,di-iso-propyl-, di-n-butyl-, di-iso-butyl-, di-sec-butyl-, and di-n-amyl- phosphite,reacted with aniline in the presence of carbon tetrachloride and a tertiary baseto form the corresponding dialkylanilinophosphonates (II). It was found thatthe reaction became increasingly difficult for the dialkylphosphites in thefollowing order: dimethyl-, diethyl-, di-n-propyl-, di-n-butyl-, di-n-amyl-,di-iso-butyl-, di-iso-propyl-, and di-sec-butylphosphite. Seven auxiliary bases, namely, triethanolamine, methylpiperidine, 2, 4, 6-col-lidine, α-picoline, pyridine, dimethylaniline and diethylaniline, were employedin above reaction. The auxiliary effects of the tertiary bases used decreasedin the following order: triethanolamine, methylpiperidine and 2, 4, 6-Collidine;while α-picoline, pyridine, dimethylaniline and diethylaniline gave no auxiliaryeffect. Obviously the basicity of auxiliary base was very important. (2) This method can also be used to prepare dialkyl phenylhydrazino-phosphonates (IV), such as diallyl-, dimethyl-, diethyl-, di-iso-propyl-, di-iso-butyl-, di-n-amyl-, di-iso-amyl-, ethyl n-butyl- and ethyl n-amyl-phenylhydrazinophosphonates.

(一)八种亚磷酸二烃酯(包括二甲基-,二乙基-,二丙基-,二-异-丙基-,二-伯-丁基-,二-异-丁基-,二-仲-丁基-和二-伯-戊基-亚磷酸酯)在四氯化碳和一种叔胺存在下,与苯胺作用,生成二烃氧基磷酸酰胺(Ⅱ)。反应能力随下列的亚磷酸二烃酯次序逐渐减弱:二甲基-,二乙基-,二-伯-丙基-, 二-伯-丁基-,二-伯-戊基-,二-异-丁基-,二-异-丙基-,和二-仲-丁基亚磷酸酯。在上述反应中曾应用七种叔胺,三乙醇胺,甲基六氢吡啶,2-4-6-三甲基毗啶,α-甲基吡啶,吡啶,二甲基苯胺和二乙基苯胺。叔胺的辅助效应随下序递减:三乙醇胺,甲基六氢吡啶和2-4-6三甲基吡啶;另外四种叔胺(α-甲基吡啶,吡啶,二甲基苯胺和二乙基苯胺)无辅助效应。显然,辅助剂的碱性强弱是一相当重要的因素。 (二)此法亦可用作制备二烃氧基磷酸苯胼(Ⅳ),例如二丙烯基-,二中基-,二乙基-,二-异丙基-,二-异丁墓-,二-伯-戊基-,二-异-成基-,乙基伯-丁基-和乙基伯-戊苯胼磷酸酯。

The utilization of phenylvinylketone (XIII) or p-nitrophenylvinylketone(VI) as starting material for the preparation of chloramphenicol has beendeseribed. By employing the reaction of methoxymercuration, both XIII andVI reacted smoothly with mercury acetate in methanol and followed by succes-sive treatment with potassium bromide and bromine to give α-bromo-β-methoxy-propiophenone (XIV, b. p. 119--120°/1 mm), which had been prepared byRebstock in impure form from α-bromo-β-methoxypropionyl chloride andbenzene...

The utilization of phenylvinylketone (XIII) or p-nitrophenylvinylketone(VI) as starting material for the preparation of chloramphenicol has beendeseribed. By employing the reaction of methoxymercuration, both XIII andVI reacted smoothly with mercury acetate in methanol and followed by succes-sive treatment with potassium bromide and bromine to give α-bromo-β-methoxy-propiophenone (XIV, b. p. 119--120°/1 mm), which had been prepared byRebstock in impure form from α-bromo-β-methoxypropionyl chloride andbenzene through Friedel-Crafts reaction; or α-bromo-β-methoxy-p-nitropropio-phenone (IX, m. p. 41--42.5°). Some of the mercury containing intermediatesisolated in the reaction of methoxymercuration were as follows: α-acetoxymer-curo-β-methoxy-p-nitropropiophenone (VII, m. p. 138--139.5°), α-bromomercuro-β-methoxy-p-nitropropiophenon (VIII, m. p. 155--156°), and α-bromomercuro-β-methoxy-propiophenone (XIV, m. p. 144°). IX or XIV was then treated withpotassium phthalimide in N, N-dimethylformamide or acetone to give mono-phthalimido-(X, m. p. 125.5--126.5°, or XVI, m. p. 140--1,14°) and di-phthalimido-(IV, m. p. 254--255.2°, or XVII, m. p. 210°) derivatives. The mechanism offormation of di-phthalimido derivatives from the eorresponding mono-bromo- compound was suggested to be that of β-elimination which is followed by addi-tion. X was subjected to Meerwein-Ponndorf reduction to give 1-p-nitrophenyl-2-phthalimido-3-methoxypropanol (XI, 169--169.5°); to which the threo- con-figuration was assigned on the ground that the acetate thereof (XII, m. p. 202--204°) was found by mixed melting point test to be identical with that obtainedby Rebstock, who had employed this compound for the preparation of chlora-mphenicol (Rebstock reported the m. p. to be 195--197°. but we, after repeatingthe experiment, found that the m. p. and mixed m. p.; recorded by us wereidenical with authentic sample). In this investigation, we have also reported that, inghead of α-bromo-β-me-thoxy-p-nitropropiophenone (IX), the product was α, β-dibromo-p-nitropropio-phenone (III, m. p. 89--91°) by brominating β-methoxy-p-nitropropiophenone(II) with bromine in acetic acid. III reacted with potassium phthalimide to giveα, β-diphthalimido-p-nitropropiop (IV, m. p. 254--255.2°), identical inmelting point and mixed melting point with the sample prepared from IX. IVwas reduced to 1-p-nitrophenyl-2,3-di-phth (V, m. p. 246--247°)by aluminium iso-propoxide. VI and XIII reacted with hypobromous acid to give the correspondingdibromo derivatives instead of the desired bromohydrins.

1.本文叙述从苯-乙烯酮或对硝基苯乙烯酮开始用甲氧汞化反应合成α-溴-β-甲氧基-苯丙酮或α-溴-β-甲氧基-对硝基苯丙酮。此两种溴化物均与邻苯二甲酰亚胺钾作用生成单及双邻苯二甲酰亚胺衍生物。 2.α-邻苯二甲酰亚胺-β-甲氧基-对硝基苯丙酮以异丙醇铝还原获得DL-threo-l-对硝基苯-2-邻苯二甲酰亚胺-3-甲氧基丙醇,其构型的确定系制成其醋酸酯后与已知物比较而证明。 3.β-甲氧基-对硝基苯丙酮与溴在醋酸中作用不能取得单溴化合物而获得α,β-双溴对硝基苯丙酮。后者与邻苯二甲酰亚胺钾生成双-邻苯二甲酰衍生物。此化合物以异丙醇铝还原获得1-对硝基苯-2.3-双邻苯二甲酰亚胺丙醇。

 
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