condensation 四级六级

Polybutylene terephthalate (PBT) is a semicrystalline thermoplastic polymer formed by a condensation process.

PBT是一种通浓缩成型而制备的，一种半结晶热塑性塑料。

Five Schiff bases were prepared from piperonal and diamines by condensation reaction.

合成新的双-胡椒醛缩二胺类席夫碱化合物。

A reduction in condensation is accomplished by the use of steam-jackets.

使用汽套就能达到降低。

The absorption spectroscopic determination of aucubin by condensation with p-dimethylaminobenzaldehyde was optimized in this paper.

用均匀设计法对对二甲氨基苯甲醛显色法测定桃叶珊瑚甙的显色条件进行了优化。

It Is necessary to include as a heat source In the thermodynamic energy equation at erm which represems the timerate of release of the latent heat of condensation of water vapor.

有必要把代表水汽结潜热释放的随时间变化率的一项作为热源项包括在热力学能量方中。

This paper researches into enhanced heat transfer of condensation of splitting gas of waste plastics and R113 on the general smooth tubes,the screw tubes and the aculei finned tubes.

本文研究制剂R113和废塑料制汽油中产生的裂解气在水平光滑管、螺纹管与“犁刺”管上的强化传热。

A kind of monosubstituted squaric amide ——mono carbamoyl amide of squaric acid 3(MCASAQ) was prepared by the condensation of squaric acid (SQ) with urea or its derivatives in water.

以水为介质,方酸与脲及其衍生物顺利发生脱水缩合,合成了一类方酸单酰胺化合物——氨甲酰类氮氧方酸3。

It was shown that the curing process of resoles, at first, proceeded by condensation reaction of methylol groups, and the formation of dimethylene ether linkage was predominant.

结果表明热固性酚醛树脂的固化,先是羟甲基发生缩合反应,缩合反应形成醚键是主要的。

Adsorbable gases can be separated by porous ceramic membranes under the capillary condensation mechanism of membrane separation, on which prior study was only limited to pure components.

多孔陶瓷膜在毛细管传质机理的作用下能够有效地分离吸附性气体。而毛细管膜分离传质机理的研究还很不充分,目前,文献报道仅局限于纯组分气体的传质模型研究。

Conclusion: Condensation to partial ciliary body and the whole retina plus second-stage trabeculectomy is one of so effective methods in the treatment of neoformative vascular glaucoma.

部分睫状体和全视网膜加二期小梁切除术是治疗新生血管性青光眼的有效方法。

A foamable phenolic resin was prepared,through addition,condensation,in the presence of alkali.The resin was foamed with surfactant, foamer,solidifying agent , then the foam phenolplast was given .

苯酚与甲醛在碱性条件下经加成、缩合制得可发性酚醛树脂，该树脂和表面活性剂、发泡剂、固化剂一起发泡即得酚醛泡沫塑料。

The two now isonicotnic acid hydrazone and N-oxide isonicotinic acid hydrazone of ethyl furoyl acetates were synthesised. The condensations were carried out in ethyl alochol medium.

合成了呋喃甲酰乙酸乙酯异烟酰腙和呋喃甲酰乙酸乙酯N-氧化异烟酰腙。缩合反应在乙醇中进行。

Vitreous changes were cardinal findings.Vitreous cells were noted in 27(77%) eyes, snowball in 15(43%) and retrolental condensation in 7(20%).Snowbank was found in only 1(3%) eye.

玻璃体为主要发炎部位，其中玻璃体细胞出现于77%的患眼，雪球状混浊者43%，晶体后结者20%，而雪堤者仅1眼(3%)。

This paper reports the improvement on the synthesis of 5 methylisoxazol 3 formamide by Claisen condensation of diethyl oxalacetate followed by cyclization and ammonolysis.

讨论了以草酸二乙酯为原料,经克莱森缩合、环合、氨解反应合成5甲基异唑3甲酰胺工艺的改进。

High-grade filling and retanning agent CDF was prepared by condensation polymerization reaction of urea,cyanuramide and dicyandimide.The property and application of the product were discussed.

本文主要论述了用脲、双氰胺、三聚氰胺等原料经缩聚反应制备填充复鞣剂CDF的方法及其性能与应用。

The main synthetic methods of o-phenylphenol were reviewed.The method and research status of dehydrogenation to o-phenylphenol after cyclohexane condensation reaction were discussed detailedly.

摘要介绍合成邻苯基苯酚的几种主要工艺方法，对环己酮缩合脱氢法制邻苯基苯酚的合成方法及研究状况进行详细阐述。

Based on the theoretical analysis, the electrohydrodynamics (EHD) enhancement of condensation heat transfer inside vertical tube for five representative electrodes were investigated.

基于EHD强化管内结换热的理论分析，对5根直径不同的电极进行了垂直管内EHD强化结换热实验研究。

Alizarin complexone is obtained by the condensation of alizarin with formaldehyde solution and iminodiacetic acid in the presence of alkaline conditions.

茜素络合指示剂是在碱性条件下由茜素、甲醛和亚氨基二乙酸缩合而成。

Thirteen new compounds of the alkyl styryl indoline spirobenzopyrans were synthesized from the condensation of 2-methylene indoline with the designed salicylaldehyde.

利用2-亚甲基吲哚啉和取代水杨醛缩合得到十三种新的烷基苯乙烯基吲哚啉螺苯并吡喃。

Nowadays precision dew point hygrometers are mostly the type of light-electricity detection,thermoelectric refrigeration and specula-surface condensation dew point instrument internationally.

目前国际上的精密露点仪大多为光电检测且热电制的镜面式露点仪。