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A novel type of amphiphilic tri-block copolymers with both pH and temperature sensitiveness: poly-poly (dimethylamino ethyl methacrylate)-poly (ε-caprolactone)(PEG-PDMAEMA-PCL) was synthesized via sequential oxyanionic polymerization of macro-molecular: PEG, with a hydroxyl at one end, and dimethylamino ethyl methacrylate andε-caprolactone, with the potassium naphthalene as the initiator.

在本文中,报道了一类新型的兼具pH和温度敏感的双亲性嵌段共聚物:聚乙二醇-聚甲基丙烯酸N,N-二甲氨基乙酯-聚己内酯(PEG-PDMAEMA-PCL)及聚甲基丙烯酸N,N-二甲氨基乙酯-聚己内酯(PDMAEMA-PCL)的制备;并利用动态光散射和氢核磁共振光谱(~1H NMR)对该嵌段共聚物的水溶液性质进行研究;在此研究结果的基础上,初步探讨了其在仿生物矿化中的应用。

Military News Agency (2009/11/29) Tri-Service General Hospital's ophthalmology department says, it has been proved by the novel multifunctional visual quality analyzer that discardable silicone hydrogel hyper oxygen permeable contact lenses can be used in high altitude flight, succeeding in not only vision correction but also stability and comfortability.

军闻社》(2009/11/29)三军总医院眼科部表示,在高空飞行环境下,经新式多功能视觉品质分析仪实证,人员配戴抛弃式矽水凝胶高透氧隐形眼镜,除视力可获得矫正外,其镜片稳定性高及舒适感佳,使用上非常方便。

Experiments show that water solution contained 0. 5 -1 % sodium sulfate and 1 - 2% acetic acid is treated by means of electrodialyzer of 200 × 400mm assembled with tri - membrances and 19% sodium sulfate and 20% acetic acid are recovered by concentrating and separating. The content of salt and acid in the purified water is less than 0. 01%, current efficiency greater than 85 %, flow length in 3 ~ 5m and power consumption about 40 ~ 50 kwh/t.

实验表明,含0.5~1%硫酸钠、1~2%乙酸的水溶液通过三对膜组装的200×400mm电渗析器,分别得到含19%硫酸钠、20%乙酸的浓缩液,外排水中盐和酸的含量小于0.01%,电流效率大于85%,流程长度3~5m,耗电量40~50kwh/t。

The leftover from bamboo processing was comminuted into bamboo fine powder, which was surface-treaded with a coupling agent of ethenyl tri (β-methoxyethoxy) silane; and then in the presence of initiator dicumyl peroxide, the powder was compounded with styrene-isoprene block copolymer/bromobutyl rubber blend to prepare a crosslinked vibration-absorbing rubber composite material.

将竹加工的边角料粉碎并用乙烯基三硅烷偶联剂处理,再与苯乙烯-异戊二烯嵌段共聚物和溴化丁基橡胶的共混物进行复合,在过氧化二异丙苯引发剂的作用下制得交联型橡胶吸振复合材料。

We prepared a serious of functional polymers with RAFT method.First we synthesize a tri-block polymer.One end is hydrophobic PMMA and the other end is hydrophilic PtAA,the middle is the functional epoxy group,which can be fluorinate by CF_3COOH.

本文运用RAFT方法合成了一系列不同链长比例的三嵌段共聚物:聚—聚—聚(PMMA-b-PGMA-b-PtBMA),然后利用GMA中含有的环氧官能团,合成含氟的一段,最后将PtBMA一段酸解为亲水段PtAA,即形成了双亲双憎的嵌段共聚物。

As for curative effect, the furcal nail is better than the tri-flange nail.

这样,分叉钉在股骨头和股骨大转子基底都形成了3点固定。

Leaves opposite, petiolate; leaf blade tri- or tripliveined, abaxially usually white glaucous or tomentose.

叶对生,具叶柄;叶片三脉或三倍脉,背面通常白色或者被绒毛。

This paperindicated that it was good for condensation reaction when benzene-ring bearingelectron-attaching groups. It also showed that and the 6-hydroxyl group could bereacted with acyl halide, haloid ether and halo alkene, but not with halo alkane. It wasnot only the first time to find that the reaction product of D-mannitol and aromaticaldehyde is tri-condensation derivatives, but also the first time to obtain thep-phthaldehyde-sorbitol derivatives containing eight hydroxyl groups.

研究发现:苯环上有吸电子基团时对缩合反应有利;多元醇缩醛衍生物6-羟基除与酰氯反应外,也能和卤代酸酯、溴代烯反应,但不与卤代烷反应;首次发现D-甘露醇与醛反应主要得到三缩合物;首次合成了含有8个羟基的对苯二甲醛和山梨醇的缩合物。

The dinucleotide repeat motif was the most abundant SSR, accounting for 54%, followed by 22%, 13%, 7% and 4%, respec-tively, for tri-, hexa-, penta- and tetra-nucleotide repeats.

在 2-6 bp 的重复基元中,二核苷酸重复基元的SSRs出现频率最高(54%),依次是三核苷酸(22%),六核苷酸(13%),五核苷酸(7%)和四核苷酸(4%)。

Examples of monomers which have on average not less than 3 cross-linking groups per molecule include for example tri, tetra, penta and hexa functional isocyanates, alcohols, amines, epoxys,acrylates, siloxanes and imines.

其中的单体平均不超过3交叉连接不到每分子团体有例子包括,例如三,四,五溴和六功能异氰酸酯,醇,胺,epoxys,丙烯酸酯,硅氧烷和亚胺。

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I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像,后来回台湾,甚至去年在北京,居然也四处看见她的海报,才惊讶她的魅力之大。

Ah may dee:You are chinese living in a democratic country.

你是居住在民主国家的中国人吧。