1.Thermosensitive micellization of dextran-graft-poly(N-isopropylacrylamide) (DgP) was studied by dynamic light scattering (DLS), transmission electron microscope (TEM), gel permeation chromatography (GPC) and nuclear magnetic resonance (NMR).
利用动态光散射、透射电镜、凝胶渗透色谱和核磁共振研究了葡聚糖接枝聚(N-异丙基丙烯酰胺)(Dextran-graft-PNIPAAm,DgP)的温敏性胶束化行为。
2.The synthesis of the graft copolymer of aliphatic C 5 petroleum resin and maleic anhydride is introduced,the influencing factors on the softening poist,adhesive strength of the graft copolymer is discussed. Graft modification is an effective method to improve adhesive characters of aliphatic C 5 petroleum resin. The graft C 5 petroleum resin by maleic anhydride is used extensively on adhesives,coatings,adhesivers,etc.
介绍了C5石油树脂与马来酸酐接枝共聚物制备方法，并讨论了影响接枝物软化点、粘接强度因素，接枝改性是提高C5石油树脂粘接性能的有效方法，接枝后C5石油树脂可在粘合剂、涂料、增粘剂等方面获得广泛应用。
3.4.The reaserch was carried on with different growth days simple In Vitro and Bata seedling and the result showed that it had highest surviving rate by tube simple graft only graft material growth period from 30 days to 45 days. 5.Through graft experiment with simple In Vitro ,the result could be hold that grafted plants not only had lower surviving rate , growth also extremely slowed-moving and it expressed the graft stem had obvious pole.
生长天数越长,木质化程度就越强,形成层的活性物质处于不活跃时期,再加上嫁接材料又硬又老化难以削切,致使接口部位粗糙,难以愈合,本试验研究结果表明,贝达种子实生苗和接穗的生长天数均为30-45 天的时候,试管简易嫁接成活率最高。
4.The higtest graft level and graft efficiency were 5.45% and 54.5% respectively under the best reaction condition:temperature 120 ?,PP/AA/BPO/xylene=100/20/3/10.The effects of reaction temperature initiator, interface agent and graft monomer on solid phase graft polymerization of AA on PP were similar.
在反应温度为120℃，AA用量为PP用量的20％，二甲苯用量为PP用量的10％，BPO用量为AA用量的15％的最佳反应条件下，接枝率达5.45％，接枝效率54.5％。
5.When the mass concentration of starch and vinyl monomers was 10% and 20% respectively,the mass of initiator to reactant was 2 0%,reaction temperature was 50 ℃,and reaction time was 1 5 h,the graft percentage was 87%,the graft efficiency was 94%,and the graft frequency was 43 AGU in a graft chain of vinyl polymer.
当体系中w (降解淀粉 ) =10 %、w (乙烯基类单体 ) =2 0 %、引发剂质量为反应物质量的2 .0 %、反应温度为 5 0℃、反应时间为 1 5h时所得聚合物的接枝百分率为 87%、接枝效率为94%及接枝频率为 43。
6.Our practice is to remove the endosteal side of the graft for two reasons: first, the thin endosteal portion provides a graft to be placed across from the cortical graft; second, the endosteal surface, being rather rough and irregular, should be removed to ensure good contact of the graft with the host bone.
由于两个原因我们常规切除骨块的内骨膜面部分：其一是较窄的内骨膜面部分可以用作植骨架于皮质骨连接骨块；其二是由于内骨膜面租糙不规整，切除后能使植骨块与受区骨更好地接触。
7.This paper is concerned with the CR/MMA-AA ternary graft adhesive, which is synthesized by ternary graft copolymerization, using chloroprene rubber as main chain, AA and MMA as graft monomer and a mixture of five kinds of organic solvent as reaction solvent. In a word, this is a new method of adhesive synthesis.
本文叙述了以氯丁橡胶、甲基丙烯酸甲酯和丙烯酸为反应物质，在以五种有机化合物组成的混合溶剂中进行三元接枝共聚合反应，合成CR／MMA－AA三元接枝型胶粘剂的新工艺过程。
8.The author summarizes their experience in nursing 15 patients who underwent reconstruction of the temporomandibular joint with autogenous bone graft.Peri-operative psychological care is of significance in helping the patients maintain a good mental state and smooth recovery;pre-operative oral nursing and skin preparation are the prerequisite conditions for the survival of the graft and the prevention of wound infection;post-operative observation and care of the local wound are the determinant factors for survival of the graft;early and persistent functional training is positive for improving the function of the temporomandibular joint.
总结了对15例实施自体骨移植颞颌关节重建术患者的护理体会，认为围手术期的心理护理对于使患者保持良好的心理状态，促进其病情的顺利恢复具有重要意义；术前的口腔护理和皮肤准备是预防伤口感染、保证移植骨成活和伤口愈合的前提；术后局部伤口的观察与护理是关系到移植骨能否成活的关键；早期和长期有效的功能锻炼对于颞颌关节功能的改善具有积极意义。
9.Synthesis of HEC-AM graft copolymer initiated by (NH_4)_2S_2O_8-Na_2SO_3. The effect of the different concentration of HEC and others factors on molecular weight of HEC-AM graft polymer was discussed. The results show that the effect on molecular weight of graft polymer as follow, the concentration of HEC is greater than concentration of initial reagent and than the initial temperature.
以(NH4)2S2O8-Na2SO3作为引发体系,合成羟乙基纤维素丙烯酰胺接枝聚合物,着重讨论了羟乙基纤维素含量对相对分子质量的影响,通过正交实验得出聚合物相对分子质量影响因素依次为:HEC含量>引发剂用量>初始温度;
10.The graft copolymerization of methyl methacrylate (MMA)onto crosslinked corn starch with eerie ammonium nitrate as the initiator was studied. It wag shown that the percent of grafting(G%)and graft efficiency (E%) were considerably affected by[Ce4+],[MMA],temperature,and reaction time.
本文以硝酸铈铵为引发剂,制得了甲基丙烯酸甲酯与交联玉米淀粉的接枝共聚物,当〔Ce~(4+)〕为5×10~(-3)mol·L~(-1)、〔MMA〕为7.52×10~(-1)mol.
