查询词典 chains

A series of new DB21C7 derivatives with straight arm chains (crown 1 ~ 20) were firstly synthesized, and a thorough and systematic study about the influence of side arms which containing different length polymethylene and certain functional groups on extraction capacity of the parent DB21C7 was made.

本文利用DB21C7中苯环的活性，通过苯环上的亲电取代反应，首次设计合成了二苯并-21-冠-7桥连的二酮、直链烷烃、二醇、二酮酸、二烷酸以及二酰胺，共20个DB21C7取代衍生物，并以IR、~1H NMR、MS和元素分析进行了表征。

The first step in the degradation is most probably the classical ester scission reaction to give a carboxylic acid and olefinic end groups. Further ester scission on the adjacent ester groups of carboxylic acid and olefinic molecular chains can then lead to the formation of lower weight pyrolytic products, such as: CH〓=CHOCOPhCOOCH=CH〓、CH〓=CHOCOPhCOOH and HOOCPhCOOH, and they can pyrolyze continually to produce substrate pyrolytic compounds, such as: HOOCPhCOCH〓、PhCOOH、PhH、PhCOCH〓 and CO、CO〓. At the same time, a corsslinking cyclization reaction occurred of the formation of the gas products during the degradation of PET.

断裂大分子链端邻近羰基和乙烯基的酯键持续断裂，不断地形成小分子裂解产物，如：CH〓=CHOCOPhCOOCH=CH〓、CH〓=CHOCOPhCOOH以及HOOCPhCOOH，这些产物还会进一步裂解成分子量更低的小分子裂解产物，如：HOOCPhCOCH〓、PhCOOH、PhH、PhCOCH〓以及CO、CO〓等，与此同时，一部分乙烯基酯端基的大分子链碎片会发生支化而相互连接，再经&链脱离&和环化反应形成难燃的交联产物。

No matter how good the recall, forwarded messages, reply chains and so on are not recallable without undue effort so it is better to recall quickly if you must.

再好的回收，转发邮件，答复链等，不recallable无不当的努力，所以这是更好地记得，迅速如果您必须。

For example, in 2002, Levono Group expanded its business in both horizontal and vertical directions by reconstructing its funds for four times. It cooperated with Xoceco electron to set up " Levono Xoceco mobile communication corporation", and it annexed Han consultating Company, Guangzhou Aisoft, Guangzhou Zw. Thus, Levono formed "three horizontals, foru verticals" industry structure in Guangzhou, i.e. it finished three horizontal value chains ---- IT service foundation platform, horizonal application and system recharter. Since then, Levono launched its businesses in e-government affairs, finance, insurance and telecommunication on full scales.

如2002年联想集团通过四次资本运作进行业务纵横向的扩张，与厦华电子联合成立&联想厦华移动通信公司&，收购汉普咨询、广州智软、广州中望形成&三横四纵&的产业格局，从而打通IT服务基础平台、水平应用和系统外包三大横向完整价值链，全面进军电子政务、金融、保险与电信四大行业IT服务领域所实施的IT多元化尝试发展阶段。

In megametaphoric metafunctions, the syndromes produced by its ideational function in syntagmaxis form the basis of signifying chains, with its registral elements co-occuring and extending regularly in the same text so as to form the extensive and gestalt semantic framework of a metaphorical text; meanwhile, the metaphoric degrees can be shown in the rankshifts produced in parataxis.

其中，博喻的概念功能在横组合中产生的综合征形成&意指链&的基础，并以其语域成分在同一篇章中共现且作有规律的延伸，从而呈现出延展性和完形性等特征，并以此构成隐喻性篇章的语义框架；而在纵聚合中产生的级阶转换则可显示出一个变体的隐喻程度。

Main products: man and ladies bags, travel bags, handbags, fashion ladies bags, pen bags, cosmetic bags, document bags, Non-woven shopping bags, pp woven bags, cotton bags,resinic crafts, polyresin ,solar keychain,key chains etc.

主营产品︰男女士皮包、旅行包、手提包、休闲女包、学生笔袋、化妆包、文件袋、无纺布/不织布环保购物袋、PP编织袋、棉布袋、树脂工艺品、钥匙扣、毛绒玩具等。

Repair ring prongs, tighten clasps, untangle chains and restring necklaces.

修复环橛，加强扣，理清链和restring项链。

Repair ring prongs, tighten clasps, untangle chains and restring necklaces.

修复环橛，加强扣，理清链和restring项鍊。

In the extensional rheometric tests, the occurrence of phenomena of "strain hardening1relied on the structure of linear long chains, and mPE didn"t show the behavior of "strain hardening", which implied that the melt strength of mPE was poor.

通过研究发现，在n1PE中混入少量LDPE，不仅能够显著降低n1PE的熔体粘度，提高其熔体粘度对剪切速率的依赖性，而且还可以有效地提高mPE的熔体强度，使mPE熔体在拉伸流动中出现显著的&应变硬化&现象。

During the non-isothermal crystallization, compared with common PE, the cooling rate had less impact on the crystallization rate of mPE. Second, the sensitivity of the melt viscosity of mPE to the shear rate was poor, and the introduction of long chain branches onto the molecular structure of mPE could improve the dependence of their melt viscosity on both shear rate and temperature. In the extensional rheometric tests, the occurrence of phenomena of'strain hardening' relied on the structure of linear long chains, and mPE didn't show the behavior of'strain hardening', which implied that the melt strength ofmPE was poor.

其中通过共聚方法在mPE分子中引入非线性长支链结构，对提高mPE熔体粘度对温度的依赖性作用较为明显，而对提高mPE熔体粘度对剪切速率的依赖性以及对提高mPE熔体强度作用较弱；采用共混方法在mPE体系中引入线性长支链结构，则对提高mPE熔体粘度对剪切速率的依赖性以及提高mPE的熔体强度的作用较为明显，而对于提高mPE熔体粘度对温度的依赖性作用相对较弱。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。