查询词典 bud grafting

In the three systems, system realizes the crosslinking of PVC bases on the peroxide crosslinking mechanism, the tensile strength of crosslinked PVC has been improved somewhat, the IR spectrum of gel demonstrates that there are characteristic absorption peaks of n-alcohol that belongs to ethanol amine and benzenoid group. From the analysis of gel structure , deduces that the mechanism of crosslinking reaction: under the initiations of peroxide and high temperature, PVC yields macromolecules free radicals, at the same time , styrene"s polymerization and grafting onto PVC takes place, at last the system forms crosslinking structure through coupling between radicals; confirms that triethanol amine can absorb HC1 produced by degradation of PVC, so improves the crosslinking efficiency of peroxide, decreases the HCl"s promotion for PVC"s degradation; deduces that triethanol amine can activate the PVC macromolecules and prolong the free radicals" life-time of PVC macromolecules; the effect to the PVC macromolecule makes styrenes graft reaction easy, and thus improves the crosslinking efficiency.

三种体系中三乙醇胺/过氧化二异丙苯/苯乙烯体系基于过氧化物交联机理实现了聚氯乙烯的交联，聚氯乙烯交联后拉伸强度有一定提高，凝胶红外光谱分析证实了凝胶结构中含有乙醇胺的伯醇基团特征吸收和苯环的特征吸收，由凝胶结构分析，推断出交联反应的机理：聚氯乙烯在过氧化物和热作用下产生大分子自由基，苯乙烯在过氧化物和大分子自由基的作用下发生聚合和接枝反应，最终通过自由基之间的偶合产生交联；证实三乙醇胺可以吸收聚氯乙烯分解产生的HCl，提高了过氧化物的交联效率，消弱了HCl对聚氯乙烯降解的促进作用；推断三乙醇胺可以活化聚氯乙烯大分子并有可能使聚氯乙烯大分子自由基存在的时间得以延长，对聚氯乙烯大分子的作用使苯乙烯的接枝反应易于发生，从而提高了交联效率。

Cleft-grafting of green budwood is also successful.

腭裂嫁接绿穗扦插也是成功。

Among them, 30 patients were in the iliac grafting group, and 40 patients were in the plate-screw fixation group (Codman in 11 cases, Orion in 17 cases and Caspar in 12 cases).

其中单纯植骨组30例，植骨加钛板内固定组40例（Codman钛板11例，Orion钛板17例，Caspar钛板，12例）。

Grafting polymerization of acrylic acid onto flax initiated by ceric salt has been studied.

研究了利用铈盐引发丙烯腈与亚麻接枝共聚反应。

The grafting is believed to take place principally through the active centers which are formed on the cellulose substract by the action of ceric ion.

可以认为，接聚反应的发生主要是通过铈离子与纤维素作用在纤维素上生成活性中心。

With cerous ammonium nitric-ethylene diamine tetraacetic acid as an initiator, and with the protection of the nitrogen the graft-copolymerization of methylacrylic acid and vinyl acetate on chitosan grafting was studied.

以硝酸铈铵－乙二胺四乙酸为引发剂，在N2气的保护下，研究了壳聚糖与甲基丙烯酸和醋酸乙烯酯两种单体的接技共聚反应。

Percutaneous autogenous bone marrow grafting is capable of osteogenesis in the cicatricial bone defects.

经皮自体骨髓移植在骨缺损瘢痕组织内有成骨作用，在临床上可作为治疗骨不连的方法，尤其适用于骨不连部位软组织条件差、不具备开放植骨的病例。

When the concentration of MAH is higher than that of St, some MAH monomer reacts with St to form SMA, others can directly grafts onto PP macroradicals. When the amount of St added is higher than that of MAH, part of St monomer may preferentially react with PP macroradicals to form more stable styryl macroradicals, while others copolymerize with MAH, yielding SMA. MFR of the grafted PP is lower in this case. It is considered that MFR of the grafted PP is decided by concentration of free monomers, or, number of grafting reactive species. FTIR analysis confirmed the above mechanism.

当MAH单体用量多于St单体时，一部分MAH单体与St反应生成SMA，另一部分可直接与PP大分子自由基进行接枝反应；当St单体用量多于MAH单体时，除与MAH反应生成SMA之外的St单体可先与PP大分子自由基反应，并起到稳定PP自由基的作用，这时接枝物的MFR较小，亦即接枝物的MFR与体系中可进行接枝反应的活性种数目有关。

In order to accelerate propagation of Corylus heterophylla, status and trends in study of layering, cutting, grafting and tissue culture were reviewed, problems existed in related research were analyzed and future direction of development was also pointed out.

为了加快榛子苗木繁殖的速度，综述了有关榛子压条、扦插、嫁接和组织培养等方面研究的现状与趋势，分析了相关研究中存在的问题，并指出了其发展方向。

The recurrent rate of costochondral graft arthroplasty is lower than others, but severe absorption of grafting bone can be observed during long-term follow-up.

肋骨肋软骨复合体移植关节成形术术后复发率低，但远期移植骨吸收明显。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。