查询词典 ethylene

Binary blends of polyoxymethylene/co-polyamide and ternary blends of poly- oxymethylene/co-polyamide/ethylene-vinyl (POM/COPA/EVA) were prepared and the effect of COPA and EVA contents on properties of blends was investigated.

研究了聚甲醛/共聚酰胺二元及聚甲醛/共聚酰胺/乙烯-醋酸乙烯酯共聚物(POM/COPA/EVA)三元共混物，探讨了COPA、EVA用量对共混体系性能的影响。

In this paper, a new generation polymer of guide-3,4-poly ethylene dioxythio phene was introduced. Preparation processing of PEDT films was studied. Most of principle was recommended. The influence of different process factors on PEDT films properties had been discussed, observing the surface situation ,and studying the relationship between conductivity、surface situation and mensuration of degree of polymerization .

本文介绍了新一代导电聚合物材料PEDT(3，4—聚乙烯二氧噻吩)的主要特点，相关原理，及合成方法，研究发现影响薄膜电导率和致密度的影响因素如：聚合温度，单体和氧化剂配比等，研究了PEDT材料的热稳定性，对PEDT的膜层表面形貌以及分子量的测定方法进行了研究。

Ethylene-bis-heterocyclic compounds is much international attention in recent years a new type of photochromic material.

二芳杂环基乙烯类化合物是近年来国际上备受重视的一类新型光致变色物质。

The C 5 Fraction derived from ethylene steamcracker contains some very useful components, isoprene, cyclopentadiene and piperylene .

来自裂解乙烯的 C5馏份含有非常有用的化工原料——异戊二烯、环戊二烯、戊间二烯。

Determining the dilution enthalpies of DMF and DMA in aqueous glycerol solutions of various molalities, we discussed peptide bond and hydrophobic side chains interacting with glycerol in aqueous solutions. Molecular dynamics simulating ethylene glycol and glycerol solutions have been done to study the microscopic structure of polyhydroxy compounds solutions.

本文用滴定量热法研究了298.15K下酰胺(N—甲基甲酰胺、N，N—二甲基甲酰胺、N—甲基乙酰胺和N，N—二甲基乙酰胺)分别在于MAO水溶液和尿素水溶液中的焓相互作用，探讨了溶剂变化对酰胺侧链相互作用的影响，从肽键及疏水侧链角度研究了TMAO和尿素对蛋白质稳定性的影响。

The fluorescence properties of polymethylene bis-b-naphthoates I (n = 2, 3, 4, 5, 10) in poor solvents such as DMSO-water and ethylene glycol-water were measured under stationary and nonstationary conditions at various temps.

本文研究了双-β-萘甲酸多亚甲基二醇酯在二甲基亚砜-水(DMSO-H2O)和乙二醇-水(EG-H2O)两种混合溶剂中的稳态和时间辨荧光光谱以及温度、溶剂组成对荧光光谱的影响。

We propose that ethylene is part of a signaling pathway that modulates cell diision in the quiescent center in the stem cell niche during the postembryonic deelopment of the root system.

我们假设在根系统胚后发育过程中，次乙基调节在干细胞维环境静止中心区域的细胞分裂的一个信号转导通路

In order to understand the relationship between endogenous phytohormones and preharvest fruit drop of apples, contents of IAA and ABA in peduncle, bourse and the tissues around abscission zone of several apple cultivars were periodically analyzed during 8 weeks before harvest, and activity of cellulase in the tissues around abscission zone were periodically analyzed during 20 days before harvest, and ethylene evolution in fruit were analyzed in harvest time.

为了探讨苹果采前落果与内源激素之间的关系，在采前8周间定期测定了不同苹果品种的果柄、果台和离层形成部位组织中IAA、ABA含量；在采收前20d内定期测定了离层部位组织中细胞壁分解酶的活性；在收获期测定了果实乙烯的发生量。

Results showed that contents of IAA and ABA in peduncle, bourse and the tissues around abscission zone among several cultivars were very different, but their trend of change was similar, IAA content decreased and ABA content increased toward harvest time for all the cultivars. Ethylene evolution in fruit of the cultivars with higher preharvest drop was evidently higher than the cultivars with less preharvest drop. Cellulase activity in the tissues around abscission zone of the cultixars with higher prehanest drop rapidly increased toward harvest time.

结果表明：不同品种果柄、果台和离层部位组织中IAA和ABA含量变化有差异，但它们变化的总趋势相似，都是随着果实成熟IAA含量下降，而ABA含量上升；不同品种的成熟果实中乙烯发生量有很大差异，以落果多的品种显著大于落果少的品种；采前落果重的品种离层部位组织中细胞壁分解酶的活性在果实成熟期急剧增加。

Chinese huge LNG imports probabilize the ethylene recovery from LNG.

而我国将大量进口LNG，这便使从LNG中回收乙烯原料成为了可能。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。