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phase transfer     
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  相转移
     A STUDY OF CARBENES I THE PHASE TRANSFER CATALYTIC ACTION OF FOUR PHASE TRANSFER CATALYSTS IN PREPARING DICHLOROCARBENE
     卡宾的研究Ⅰ 四种相转移催化剂在二氯卡宾制备中的作用
短句来源
     Phase Transfer Catalytic Synthesis of Butyl Benzyl Phthalate
     相转移催化合成邻苯二甲酸丁酯
短句来源
     A STUDY OF CARBENES (Ⅲ):THE ADDITION REACTION OF DIBROMOCARBENE THROUGH PHASE TRANSFER CATALYSIS
     相转移的二溴卡宾反应
短句来源
     SOLID-LIQUID PHASE TRANSFER EQUILIBRIUM OF ONIUM SALTS ( Ⅰ )
     鎓盐的固液相转移平衡研究(Ⅰ)——溴化四丁铵和羧酸钾的平衡常数测定
短句来源
     THE STUDIES ON THE PHASE TRANSFER CATALYTIC EFFECTS OF POLYOXYETHYLENE SURFACTANTS (IV) ——The Application in Horner-Emmons Reaction
     聚氧乙烯类表面活性剂相转移催化性能的研究(Ⅳ)——在Horner-Emmons反应中的应用
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  相迁移
     The as-synthesized VO2 (B) nanorods was treated by H2O2 and CTAB solution and VO2 (M) nanorods were attained through phase transfer process of VO2(B)-VO2 (R)-VO2(M).
     VO_2(B)纳米棒经H_2O_2和CTAB溶液处理,发生了VO_2(B)→VO_2(R)→VO_2(M)相迁移过程,得到VO_2(M)纳米棒。
短句来源
     Synthesis of Polyacrylamide by Phase Transfer Emulsion Polymerization
     相迁移乳液体系聚丙烯酰胺合成工艺研究
短句来源
     The influence of acrylamide concentration in ternary phase diagram of Span 80-Tween 85/Isopar M/ acrylamide aqueous solution system has been investigated to optimize polyacrylamide technics by phase transfer emulsion polymerization. Based on primary inverse emulsion polymerization, phase transfer emulsion polymerization gets the product of polyacrylamide miniemulsion, which has the character of microemulsion.
     本论文主要研究丙烯酰胺对Span 80-Tween 85/Isopar M/丙烯酰胺-H_2O拟三元体系相图的影响,从而探讨聚丙烯酰胺相迁移乳液聚合的开发,实现以反相乳液为初始体系,合成具有微乳液体系特征的聚丙烯酰胺细乳液产品。
短句来源
     As a result, the microemulsion area is broadened in the ternary phase diagram. (2) The optimum conditions of preparing phase transfer emulsion polymerization system: compound emulsifier concentration (accounting for 2.5% the mass of emulsion system);
     (2)制备相迁移乳液聚合体系的最优条件:复合乳化剂浓度(占总体系质量)2.5%,其中乳化剂Span80:乳化剂Tween 85=3:1(wt/wt);
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     It was demonstrated that the leachation of the water soluble organic carbon sorbed on the surface of organic mineral complex occur in three steps of a) desorption from the surface of the complex into soil capillary pore water within granular structure; b)transfer into the gravitational pore water between granular aggregates through molecular diffusion and phase transfer,and c)being carried out of the soil matrix through convection flow.
     研究发现,吸着在土壤有机-矿质复合体表面的水溶性有机物的淋溶包括三个连续的动力学过程:即从复合体表面进入土壤毛管水的解吸作用,自土壤团粒结构内部转移到土壤重力水中的扩散和相迁移过程,以及被流动相携带淋溶的对流过程。
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  “phase transfer”译为未确定词的双语例句
     BICENTRAL POLYMER SUPPORTED PHASE TRANSFER CATALYST POLYSTYRENE-SUPPORTED POLYETHYLENE GLYCOL AND PYRIDINIUM SALT
     BICENTRAL POLYMER SUPPORTED PHASE TRANSFER CATALYST POLYSTYRENE-SUPPORTED POLYETHYLENE GLYCOL AND PYRIDINIUM SALT
短句来源
     SYNTHESIS OF N-ARYL-4-METHYLPHENOXYACETAMIDES BY MEANS OF LIQUID-LIQUID PHASE TRANSFER CATALYSIS
     SYNTHESIS OF N-ARYL-4-METHYLPHENOXYACETAMIDES BY MEANS OF LIQUID-LIQUID PHASE TRANSFER CATALYSIS
短句来源
     PHASE TRANSFER CATALYZED SYNTHESIS OF DIARYL2-NITRO-1, 4-PHENYLENEDIOXYDIACETATES
     PHASE TRANSFER CATALYZED SYNTHESIS OF DIARYL 2-NITRO-1,4-PHENYLENEDIOXYDIACETATES
短句来源
     The Action Mechanism of Phase Transfer Catalyst in the Oxidation of Toluene by Mn ̄(3+) in 40% H_2SO_4
     The Action Mechanism of Phase Transfer Catalyst in the Oxidation of Toluene by Mn~(3+) in 40% H_2SO_4
短句来源
     Study on phase transfer characteristics of systems Na_2SO_4·10H_2O and Na_2HPO_4·12H_2O
     Na_2SO_4·10H_2O和Na_2HPO_4·12H_2O体系的相变特性
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  phase transfer
Synthesis of 4-hydroxymethylbenzophenone by phase transfer catalytic method
      
Under the conditions of phase transfer catalysis and nitrobenzene as the solvent, the halogen-exchange fluorination of 2,6-dichlorobenzaldehyde using KF as fluorinating agent was studied.
      
Aromatic Crown Ethers as Phase Transfer Catalysts in the Synthesis of N-Acetylglucosamine β-Aryl Glycosides
      
The crown ether-catalyzed glycosylation of phenol, 4-methoxyphenol, and 4-nitrophenol was studied under phase transfer conditions in solid-liquid system.
      
Glycosylation of phenols with α-D-glucosaminyl chloride peracetate catalyzed by polyethylene glycol (PEG) was carried out in a solid-liquid phase transfer system at room temperature.
      
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A novel method of synthesis of cobalt clusters YCCo3(CO)8 by reduction of cobalt nitrate with sodium dithionite and followed by interaction with alkyl trihalide via phase transfer catalysis at normal carbon monoxide pressure and room temperature has heen developed. HCCo3(CO)8, ClCCo3-(CO)8) PhCCo3(CO)8, and EtOOCCCo3(CO)8 were synthesized by this method, and their activities for hydroformylation of hexene-1 were evaluated. The concomitant isomerization and hydrogenation activities of these clusters were...

A novel method of synthesis of cobalt clusters YCCo3(CO)8 by reduction of cobalt nitrate with sodium dithionite and followed by interaction with alkyl trihalide via phase transfer catalysis at normal carbon monoxide pressure and room temperature has heen developed. HCCo3(CO)8, ClCCo3-(CO)8) PhCCo3(CO)8, and EtOOCCCo3(CO)8 were synthesized by this method, and their activities for hydroformylation of hexene-1 were evaluated. The concomitant isomerization and hydrogenation activities of these clusters were investigated. The sequence of hydroformylation acthities of PhCCo3-(CO)6 for various olefins was also assessed.The experimental results showed that all these clusters are novel hydroformylation catalysts with high activity and selectivity under mild conditions, for example, the conversion of hexene-1 exceeds 80% and with a selectivity up to 80% at temperature 130℃ and pressure 40 kg/cm2.

本文提出一种常压下由硝酸钴和三卤化物经相转移催化合成钴簇络合物YCCo_3(CO)_9的新方法,并用该法合成了HCCo_3(CO)_9,ClCCo_3(CO)_9,PhCCo_3(CO)_9和EtOOCCo_3(CO)_9等四种络合物。考察了这些络合物对己烯的酸化活性和PhCCo_3(CO)_9对各种烯烃醛化时结构与活性的关系,以及它们的异构化和加氢活性。实验结果表明它们是一类在较缓和条件下具有较高活性和选择性的醛化催化剂。当反应温度130℃和压力40公斤/厘米~2时,己烯转化率达90%以上,选择性在80%以上。

This paper extends the theory of the general parameter filter without the complex loss zeros with quadrantal symmetry. That is, the loss and the delay time characteristic of pass-bands are Chebyshev-type approximation and the loss characteristic of stopbands can be specified arbitrarily. Because the nonminimum-phase transfer function can be expressed as the product of minimum-phase transfer function and all-pass function, the loss characteristic of nonminimum-phase and corresponding minimum-phase...

This paper extends the theory of the general parameter filter without the complex loss zeros with quadrantal symmetry. That is, the loss and the delay time characteristic of pass-bands are Chebyshev-type approximation and the loss characteristic of stopbands can be specified arbitrarily. Because the nonminimum-phase transfer function can be expressed as the product of minimum-phase transfer function and all-pass function, the loss characteristic of nonminimum-phase and corresponding minimum-phase transfer function is the same and a unique relationship exists between the loss and the phase characteristic of minimum-phase transfer function. A series of new formulas for the loss and the delay time function have been derived, and the Chebyshev-type approximation of the delay time characteristic of pass-band and the initial guess of all available parameters have been obtained. In this respect, this paper presents new ideas and methods. The results of this paper can be used to design varieties of filters including lumped LC filters, active filters, microwave filters, digital filters etc. The results have been made use of in actual applications and have shown great advantages.

本文提出衰减特性和通带延时特性同时最佳逼近的通用参数滤波器的理论,推广了通常的通用参数滤波器(不具有象限对称复数衰减极点的滤波器)的理论,并在通带延时特性方面提出新的概念和方法,使同时最佳逼近得以完成。文中推导有一系列公式。在优化逼近过程和起始逼近等方面,文中也有完整的结果。利用本文所得结果来设计各类滤波器,其优越性已为我们在实际设备中的具体应用所证实。

a-Alkyl-a-amino acids were synthesized from ketones, chloroform and ammonia in the presence of potassium hydroxide, lithium chloride and phase transfer catalyst.KOH/LiCl/CPhCH2N+(C2H5)3]Cl-When phenylacetone, 3,4-dimethoxyphenylacetone, acetophenone, propiophenone and cyclohexanone were used as starting materials, both a-alkyl-a-amino acids and their amides were isolated; while acetone, methyl ethyl ketone and cyclopentanone were used, the corresponding a-alkyl-a-amino acid was the only product obtained....

a-Alkyl-a-amino acids were synthesized from ketones, chloroform and ammonia in the presence of potassium hydroxide, lithium chloride and phase transfer catalyst.KOH/LiCl/CPhCH2N+(C2H5)3]Cl-When phenylacetone, 3,4-dimethoxyphenylacetone, acetophenone, propiophenone and cyclohexanone were used as starting materials, both a-alkyl-a-amino acids and their amides were isolated; while acetone, methyl ethyl ketone and cyclopentanone were used, the corresponding a-alkyl-a-amino acid was the only product obtained.

本文研究了八种酮在相转移催化剂存在下与氯仿和氨水的作用。一步得到α-烷基-α-氨基酸和它们的酰胺。用脂肪族甲基酮和环戊酮作原料时,仅得到α-烷基-α-氨基酸一种产物。

 
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