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appropriate
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  适宜
    Study on the Appropriate Conditions for Salt Effect by Combined Experiment Design Method
    运用联合试验设计法确定盐效应适宜条件的研究
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    The results showed that the appropriate conditions made SO_4~(2-)-Fe_3O_4/ZrO_2 were as follows: nFe3O4:nZrO2 was 1:10, baking temperature was 5000C.
    磁性超细固体超强酸的适宜制备条件是:nFe_3O_4:nZrO_2=1:10,焙烧温度为5000C。
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    The one-time yield of ethyl lactate achieved 51.64% infollow appropriate condition: the reflux ratio was 1:1, the molar ratio of ethanol tolactic acid was 4:1, lactic acid feeding flux was 0.6482 mol/h respectively.
    在自行设计的催化精馏塔内对乳酸和乙醇酯化反应的催化精馏过程进行了研究,建立了催化精馏实验装置,确定了实验流程,得到了适宜工艺条件为:醇酸比为4:1,回流比为1:1,乳酸进料量为0.6482mol/h,乳酸乙酯一次循环收率达到51.64%。
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    (2) The appropriate concentration of sodium carbonate should be 20%;
    (2)碳酸钠溶液的适宜浓度为20%;
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    And the appropriate RWV rotating rate of 7-10rpm was determined through the analysis and experiments.
    并且根据分析及实验得到RWV的适宜转速为7-10rpm。
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  “appropriate”译为未确定词的双语例句
    Ethanol was an appropriate solvent for recrystallization,with which the melting range of D,L-lactide was 125.8~127.4℃ and the total yield of purified lactide increased to 55.1% after three recrystallizations.
    乙醇是理想的重结晶溶剂,经三次重结晶,D,L-丙交酯熔程为125.8~127.4℃,纯产品产率提高到55.1%.
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    CONCLUSION: Study on the fouling mechanism of the membrane is of great significance for looking for the effective measures for relieving the downward trend of the membrane flux and for the appropriate membrane cleaning in the clarification of Tangkeqing Compound extract using 0.2 μm Al_2O_3 ceramic membrane.
    结论:所得到的理论结果为采用0.2μm Al2O3陶瓷膜对糖渴清复方水提液澄清工艺中减缓膜通量下降措施的选择和膜的再生奠定了一定的理论基础。
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    while the appropriate pH of immobilized enzyme was wider.
    固定化酶的最适反应pH值范围较游离态酶广.
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    The results showed that appropriate reaction condition was as follows:n-butanol-to-phthalic-anhydride molar ratio 2.0∶1,catalyst dosage=1.5% molar percentage of phthalic anhydride,reaction time 2.5 h at reflux temperature. Esterification rate of up to 98.5 % was obtained.
    实验结果表明,其较优条件为邻苯二甲酸酐0.05mol,醇酸物质的量比=2.0∶1,催化剂用量为原料邻苯二甲酸酐物质的量的1.5%,回流温度下反应2.5h,在此条件下酯化率可达98.5%。
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    The piezoelectric constant (d33) of the composite increased with increasing the volume fraction of PMN, and appropriate delay of polarizing time or increasing polarizing voltage could be helpful to improve the value of d33. The optimal polarzing voltage was 7 kV/mm and the optimal polarzing time was 25 min.
    当填充PMN体积分数增至40%后,复合材料的纵向压电应变常数(d33)随PMN用量的增加而增大; 适当地延长极化时间和增加极化电压有利于提高d33,最佳极化电压为7kV/mm,最佳极化时间为25min;
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  appropriate
These results are quite remarkable since these algebras do not admit appropriate sl2-triples.
      
When one expands a Schur function in terms of the irreducible characters of the symplectic (or orthogonal) group, the coefficient of the trivial character is 0 unless the indexing partition has an appropriate form.
      
It is shown that this is possible when the window g ε L2(?) generating the Weyl-Heisenberg frame satisfies an appropriate regularity condition at the integers.
      
In particular, the results in this article show that the oscillations of a function at large scale are comparable to the oscillations of its samples on an appropriate discrete set of points.
      
Under the appropriate definition of sampling density D?, a function f that belongs to a shift invariant space can be reconstructed in a stable way from its non-uniform samples only if D?≥1.
      
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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。

The distribution coefficients, Kd, between Zn(Ⅱ) or Cd(Ⅱ) in solutions of different concentrations of hydrochloric acid and acetone and anion exchange resin were determined and the relation between Kd and the composition of the eluent was studied. It was found that when Kd is under 10, the desorption is good, and when Kd is greater than 90, the adsorbed ions cannot be eluted. When 0.01N HCI-30% acetone was used as the eluent, Zn(Ⅱ) cOuld be satisfactorily separated from equivalent or less than equivalent quantity...

The distribution coefficients, Kd, between Zn(Ⅱ) or Cd(Ⅱ) in solutions of different concentrations of hydrochloric acid and acetone and anion exchange resin were determined and the relation between Kd and the composition of the eluent was studied. It was found that when Kd is under 10, the desorption is good, and when Kd is greater than 90, the adsorbed ions cannot be eluted. When 0.01N HCI-30% acetone was used as the eluent, Zn(Ⅱ) cOuld be satisfactorily separated from equivalent or less than equivalent quantity of Cd(Ⅱ). If 0.01N NH_4Cl-30% acetone or 0.01N NaCl-30% acetone was used as the eluent, the same results were obtained as when 0.01N HCl-30% acetone was used. During the selection of an appropriate eluent for the separation of ions based on the results of batch equilibrium experiments, we should not solely consider the separation factor, α, as most authors have done, but the distribution coefficient, Kd, should also be considered. When the quantity of the ion with the greater Kd (Cd(Ⅱ)in the present case) is quite large, we must also consider the relative quantities of the ions to be separated, because when the quantity is large, the ion tends to be eluted earlier than it should be, then it is quite possible for it to mix with the ion with the smaller Kd.

测定了Zn(Ⅱ)和Cd(Ⅱ)在不同濃度的盐酸和丙酮溶液和阴离子交換剂之間的分配系数,Kd,討論了Kd和濃度之間的关系。发見Kd在10以下的冲洗效果好,在15以上的有拖尾現象,大於90的則不被冲洗。如果以0.01N HCl-30%丙酮做为Za(Ⅱ)的冲洗剂,可使大量Zn(Ⅱ)和等量或少量Cd(Ⅱ)分离。用0.01N NH_4Cl-30%丙酮溶液和0.01NNaCl-30丙酮溶液做为Zn(Ⅱ)的冲洗剂,可得到同样的結果。在根据分批平衡实驗結果选擇冲洗剂来分离离子时,不仅要象一般論文中所指出的那样依据分离因数,α,且須考虑分配系数,Kd。在Kd較大的离子的量远此Kd較小的离子的量为大时,因为量大时会提前被冲出的原因,还要顾到它們的比例。

By a modified phosphodiester method several oligodeoxyribonuoleotides (d-pCpC, d-pCpCpC, d-pCpCpCpA)were synthesized ohemically.The main points of the modification are: (1) deproteotion of all the protecting groups in order to overcome difficulties encountered in the isolation of oligonuoleotides on column chromatogra.phy,due chiefly to the lipophilic properties of the protecting groups. (2) the appropriate reprotection of the desired oligonuoleotides necessary for the next condensation to avoid the unexpected...

By a modified phosphodiester method several oligodeoxyribonuoleotides (d-pCpC, d-pCpCpC, d-pCpCpCpA)were synthesized ohemically.The main points of the modification are: (1) deproteotion of all the protecting groups in order to overcome difficulties encountered in the isolation of oligonuoleotides on column chromatogra.phy,due chiefly to the lipophilic properties of the protecting groups. (2) the appropriate reprotection of the desired oligonuoleotides necessary for the next condensation to avoid the unexpected loss of the proteoting groups that might have occurred in the previous operations of the phosphodiester method. Thus the yields of the obtained oligonucleotides are increased and the purities improved.Although the present modification has only been applied to the synthesis of short oligonucleotides , it may provide an alternate approach to the chemical condensation of two short natural segments of DNA through the formation of the 3'-5'phosphodi eater bond.

用改进的二酯法化学合成了几个脱氧寡核苷酸片段(d-_pC_pC,d-_pC_pC_pC,d-_pC_pC_pC_pA)。改进的主要之点是:(1)全部脱去保护基后柱分离,以克服在柱分离时寡核苷酸的保护基引起的亲脂性;(2)对所需的寡核苷酸片段重上适当的保护基,以作下一步的合成之用,于是避免了原先二酯法的操作中保护基的不希望有的丢失。用改进二酯法获得的寡核苷酸,产率和纯度得到提高和改善。虽然此改进目前仅用来合成寡核苷酸短片段,但可能提供用3′-5′磷酸二酯键方式连接两天然DNA短片段的途径。

 
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