再聚合

In this regard, our goal is to develop a glow-discharge method to functionalize titanium surfaces by the covalent immobilization of bioactive organic molecules.

钛金属圆片先以氩气电浆去除表面污染物，来产生可重复取得的清洁表面，接著用丙烯胺电浆处理，使丙烯胺聚合在钛金属表面，再以交链剂戊二醛将白蛋白与丙烯胺的胺基(-NH2)键结。

Two kinds of high alcohol acrylates were prepared by octadecyl alcohol and hexadecyl branched alcohol,respectively.The polymers of depressants were prepared by maleic anhydride-styrene-higher alcohol acrylates.By using these depressants,the pour points of the Liaohe crude oils were lowered form 30℃ to 20℃.

分别采用碳十八直链醇、碳十六支链醇与丙烯酸合成烷基酯，将烷基酯再与顺丁烯二酸酐、苯乙烯聚合制备的三元共聚物，对辽河油田的高凝原油的降凝效果进行了评价，实验发现这两种聚合物对凝固点为30℃原油都具有较好的效果，降幅可达10℃左右，但对凝固点为41℃的原油较差分别为3℃和6℃。

Based on B-trichloroborazine with boron-nitrogen ring structure, the monomer was synthesized by substitution reaction with different molar ratio of propylamine/isopropylamine, then the corresponding polyborazine was obtained through thermal polymerization.

以三氯环硼氮烷为原料，将其与正丙胺/异丙胺进行共取代反应，制得了不同结构的取代单体，再经热聚合反应获得了相应的聚硼氮烷先驱体。

Based on B-trichloroborazine with boron-nitrogen ring structure, the monomer was synthesized by substitution reaction with different molar ratio of propylamine/isopropylamine, then the corresponding polylyborazine was obtained through thermal polymerization.

以三氯环硼氮烷为原料，将其与正丙胺／异丙胺进行共取代反应，制得了不同结构的取代单体，再经热聚合反应获得了相应的聚硼氮烷先驱体。

The results indicate that polyborazine precursor prepared at 150℃ for 10 h and propylamine/isopropylamine molar ratio 2:1, could possess nearly linear molecule skeleton and he prone to melt spinnability. When melt at 90℃, the precursor fibers are prepared with average diameter 10-20μm and BC1.27 N1.52 H structure. After curing process and sintered in NH3 at 1200℃, the near-stoichiometric BN fibers was obtained, which proved this precursor is apt for preparation of BN fibers.

结果表明，当正丙胺／异丙胺摩尔比为2：1，聚合温度为150℃，反应时间为10h时，合成产物具有近似线性分子结构，熔点为90℃，具有良好的成丝性，可获得平均直径10~20μm，组成为BC1.27N1.52H的先驱体纤维，先驱体纤维再经不熔化处理及1200℃氨气高温锻烧等工艺可获得近化学计量比的氮化硼纤维。

Myrcene, unreacted isoprene and solvent were separated form reactant by conventional distillations, the contents of recovered isoprene, solvent and...

回收的溶剂和异戊二烯可以再利用，月桂烯的总收率大于 4 0 %，异戊二烯直接二聚合成月桂烯工艺简单，便于放大

Scanning electron microscopy,transmission electron microscopy,circular dichroism and small-angle X-ray diffraction were used to analyze the aggregation mode of CSG in the organogel phase.A hierarchical self-assembly model was proposed to explain the transition from molecular to primary and secondary structure.It is shown from our results that CSG can aggregate into a micellar fibril nanostructure with high length-to-width ratio which is bundled and entangled to form a three-dimensional(3D) network that immobilize the fluid component probably by surface tension.Moreover,sol-gel polymerization of tetraethoxysilane was carried out using CSG in the gel phase.

通过扫描电镜(ScanningElectron Microscopy，SEM)、透射电镜(Transmission Electron Microscopy，TEM)、圆二色谱(Circular Dichroism，CD)和小角X—射线衍射仪(Small-angle X-rayDiffraction，SAXRD)考察CSG分子自组装行为结果表明，CSG形成的聚集体具有多级结构：首先CSG通过手性堆叠自组装形成直径在9—10nm的细纳米纤维，这些细的纳米纤维再以不规则的六方堆积的方式进行排列，构成直径在40—100nm的粗纳米纤维(即细纳米纤维的&捆束&)，最后粗纳米纤维互相粘连形成三维网络状结构，使有机溶剂&固定&，从而形成凝胶；以CSG有机凝胶为模板，四乙氧基硅烷为前体，通过溶胶—凝胶聚合的方法制备了直径大约为100nm的二氧化硅纳米管。3。

Tuberculosis H37Rv strain was amplified by PCR and cloned to vector pEASY T1. After sequencing, it was subcloned to fusion expression vector pET28a and then transfected to E coli BL21 (DE3). It was found that the LprG protein was successfully expressed after induction with LPTG.

采用聚合酶链反应从结核分枝杆菌H37Rv基因组中扩增出LprG基因，克隆到pEASY T1中，序列测定正确后，再亚克隆到融合表达载体PET28a中，转化入大肠杆菌BL21(DE3)，经IPTG诱导表达。

Based on the technique from micrometer particle dispersion, superfine particle dispersion behavior and its effect on polymere.

结合微米分散技术基础，对超微颗粒在聚合物固体中分散及其结晶研究的进展深入探讨，揭示了聚合物基-纳米复合材料的颗粒分散经过纳米前驱物中间阶段，再进行聚合复合与熔体复合，得到颗粒均匀的分散体系。

Then a complete porphyroblast was formed.

初期石榴石、十字石等呈细片状绿泥石、云母等假象，它们组成多结晶中心的网状集合体，接着进一步聚合生长，逐渐连成一片，成为变斑晶的骸晶，然后形成完整的统一的变斑晶，再在此基础上层圈式增生。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。