查询词典 Peg

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。

The effects of ultrasonication and HF washing on SiC nano-particles were analyzed by Zeta potential, particle size distribution and SEM. The stability of suspension of SiC in ethanol, ethanediol and mixture of the two medias with PEG as dispersant at different pH were compared. The optimum ultrasonication time for SiC nano-particles was obtained. The influence of HF washing on SiC nano-particles was discussed; and high stability of SiC nano-particles suspension was achieved at pH=10 in ethanediol with 1wt% PEG as dispersant.

本文中采用Zeta电位、粒度分析、SEM等测试技术分析了超声震荡和HF酸洗对SiC纳米粉体的影响：对比研究了乙醇、乙二醇以及75%乙醇和25%乙二醇混合液作为分散介质，聚乙二醇为分散剂时纳米SiC粉体在不同pH下的分散稳定性，确定了粉体最佳超声震荡的最佳时间；探讨了酸洗的作用；并在乙二醇中，以1% PEG为分散剂，pH=10条件下获得了纳米碳化硅粉体的高稳定分散悬浮液。

The star-shaped block copolymers were prepared by ring-opening polymerization of ε-caprolactone in the presence of multiarm PEG using stannous octoate as a catalyst.Based on these star-shaped PEG- b -PCL,soluble macromers terminated with acrylate groups were synthesized.

以辛酸亚锡为催化剂，通过星型聚乙二醇引发ε-己内酯开环聚合，制备了PEG- b -PCL嵌段共聚物，进一步以丙烯酸酯封端，合成了3种水溶性大分子单体。

With the increase in PEG block content in copolymer, in vitro uptake percentage was decrease and opsonization was enhanced.

PEG-PBLG胶束随MeO-PEG嵌段比例的增加，体外细胞摄取率有降低趋势，抵抗血浆蛋白的调理作用增强。

PEG-PBLG micelles are characterized by solubilizing hydrophobic drug, increasing the nano-particles stability, avoiding the uptake by MPS at some extent, and decreasing opsonization by plasma proteins, sustained-release drug and decreasing the side effect.

PEG-PBLG载体材料结构明确，合成产率高，可生物降解；PEG-PBLG胶束可增溶疏水性药物，增强微粒制剂的稳定性及一定程度避免MPS的摄取，减小血浆蛋白的调理；载药胶束可缓释药物，降低药物毒性。

Meanwhile, more ligands were tethered onto the comb-like PEG modified surface with a great amount of reactive end groups, which increased cell proliferation. The glycocalyx mimicking surface designed with comb-shaped PEG end-tethered by RGD peptide was proved to present non-specific resistance and excellent cyto-compatibility simultaneously.

此外， CPEG比LPEG具有更多的活性反应基团，用PEG末端活性的醛基固定整合素配体多肽片段RGD，可有效地诱导材料表面的内皮细胞化，改善材料的细胞相容性。

Do not force the peg to fit the crack, choose one that fits the crack.

不要强把peg塞进裂缝，挑个适合那个裂缝的peg。

The fact that△H decreases with C_ further indicates that PEG chains reduce the interchain aggregation of PNIPAM chains.

而ΔH/随PEG浓度增加而变小，说明PEG削弱了PNIPAM链的链间聚集作用。

The critical water stress point for the variety of japonicas rice was large than 100 g/L PEG, but the indicas rice was between 50 and 100 g/L PEG.

在正常及PEG模拟水分胁迫条件下，研究不同质量比例（9：1，5：5和1：9）NH4^＋-N：NO3^-—N的氮素营养处理对连嘉粳1号、二优培九、扬粳9538和扬稻6号水稻根系生长的影响。

The replacement of toxic and volatile organic solvents as reaction media or an efficient catalyst with environmentally acceptable alternatives are an area of tremendous importance in modern organic synthesis. Basing the review about solid-phase synthesis with simple separation, the liquid phase organic synthesis supported by the solution polyethylene glycol and the chemical reactions in the medium of PEG, herein we are going to study the synthesis of 1-amidoalkyl-2 -naphthols in presence of the solution catalyst or the solid catalyst and the synthesis of thiourea in PEG-400 medium.

难溶性载体试剂参与下的固相合成使分离操作简单易行；可溶性聚乙二醇支载下的液相合成显示出液相反应的稳定高效性，同时兼顾大分子聚合物容易沉降分离的优点；无毒且稳定的小分子PEG作为反应介质，往往表现出醚和醇的双重性质和功能。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。