合成

The effect of heating temperature on the synthesis was investigated and the synthesis process was studied by thermodynamic analysis as well.

考察了加热温度对SiC-Al2O3系复合耐火粉体合成的影响并对合成过程进行了热力学分析。

The synthesis principle of vinylacetate polymer is elaborated and its synthesis method is also discussed. The hest craft conditionis probed and key problem of emulsion polymerization process is pointed out.

阐述了聚醋酸乙烯酯的合成原理及特点，研究了其合成方法，探讨了最佳工艺条件，指出了乳液聚合过程中的关键问题。

Difunctional group reagents, which have metal and heteroatom linked to the olefinic carbon atoms, play an important role in organic synthesis, especially in developing many convenient methods for the stereoselective synthesis of substituted alkenes.

含金属或杂原子的双官能团试剂为取代烯烃的立体选择合成提供了许多方便方法，在有机合成中具有重要作用。

We have studied the transition metal complexes catalyzed sequential cross coupling reactions of these new difunctional group reagents with electrophiles and nucleophiles, respectively; developed some convenient and practical new methods for the stereoselective synthesis of disubstituted alkenes, trisubstituted alkenes, conjugated dienes containing heteroatom, conjugated enyne containing heteroatom etc., enriching methodologies for organic synthesis.

继而研究了这些新型双官能试剂在过渡金属配合物催化下分别与亲电试剂、亲核试剂的顺序交叉偶联反应，为双取代烯烃、三取代烯烃、杂原子取代的共轭二烯烃、杂原子取代的共轭烯炔烃等的立体选择合成提供了方便实用的新方法，丰富了烯烃立体选择合成的方法学。

Using scanning electron microscope we discovered that,compared to the diamonds from no-sulfur system,the diamonds from sulfur-contained system have hexoctahedron shape,but its surface has many small pit s.

借助于扫描电子显微镜，研究发现，与不含硫体系合成的金刚石相比，含硫体系合成的晶体虽然具备六八面体形状，但是表面有许多小的凹坑，这些凹坑多数分布在{111}面上。

However, very little is known about whether homeostasis of histidine plays any specific role in plant growth and development.

组氨酸是生物体蛋白质合成的必需氨基酸，其生物合成途径已得到广泛的鉴定。

The degradating and redistributing of ECM were migration of VSMC and vascular remodeling through inhibiting the production of PDGF-BB and the activation of MMPs so to prevent the vascular stenosis.⑤Orthotopic hybridism in situ: The expression of MMP-3 increased after operation, the tendency and intensity were parallel to the expression of NF-κB. Tongxinluo could decrease the expression of MMP-3 and NF-κB. The study showed that the producting and activating of MMP-3 were modulated by NF-κB. The inhibition to the producting and activating of MMp-3 of Tongxinluo was mediated by inhibiting the activating of NF-κB. Conclusion ①The rabbit vascular stenosis model could be established successfully by plain balloon damage, the operation process was easy, economical and practical.

①单纯球囊损伤可成功建立典型家兔血管狭窄模型，操作方法简单，经济实用；②以VSMC增殖、迁移为主的内膜增厚以及以ECM降解、合成与再分布所致的血管重构是导致受损血管狭窄的根本原因；③通心络能明显抑制VSMC的增殖、迁移和ECM降解、合成，阻止血管内膜增生和血管重构，防止受损血管狭窄；该作用可能与其减少和阻止PDGF-BB的产生和活性，以及抑制MMPs的表达和恢复MMPs/TIMPs平衡有关；④通心络能显著抑制球囊损伤后血管内膜增生和血管重构，可能与其保护血管内皮，改善内皮功能，增加血清NO含量有关；⑤通心络抑制内膜增生和血管重构，减轻受损血管狭窄，还可能是通过抑制NF-κB的活化途径而起作用的。

In this work, a series of antimicrobial agents containing the hydantoin structure such as AM, BM and AM-AN, were synthesized by changing the reaction conditions such as temperature, time, concentration of initiator and so on, and the N-halamine structure which possessed the ability of durable antimicrobial, was transformed through a chlorination process.

本文设计合成了一系列含乙内酰脲结构的再生抗菌剂。通过改变合成反应的条件，如反应温度、反应时间、引发剂浓度、加料方式等，制备了再生型抗菌剂前体AM、BM和AM-AN共聚物。

New compounds of the type of N--N'-(2,4-dichlorophenyloxyacetyl)-semicarbazides were synthesized by a series of reactions of preparing organic isocyanates by Curtius rearrangement with 2,4- dichloro aryloxyacetic acid hydrazide using one-pot procedures.

以芳香取代酸为原料，用Curtius重排的方法合成异氰酸酯，直接与2，4-二氯苯氧乙酰肼作用，一锅法合成了4种N-取代芳基-N'-(2，4-二氯苯氧乙酰基)氨基脲类化合物。

The production principle of synthetic hydrochloric acid was introduced,and heat generated in the every process was calculated in this paper.

介绍了合成盐酸的生产原理，对合成盐酸热能进行了计算，并结合工厂实际提出了热能回收利用的措施。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失