查询词典 condensation

The result indicate that it can effectively catalyze Knoevenagel condensation and can be reused at least two times.

结果表明，聚乙二醇4000支持的哌嗪对Knoevenagel缩合反应具有较好的催化性能，而且可以循环使用多次。

In addition, spermiogenesis includes chromatin condensation, migration of the cytoplasm and mitochondria to the caudal pole of the nucleus, formation of a moderate axial nuclear fossa containing the proximal centriole and part of the distal centriole and presence of a short cytoplasmic canal separating mitochondria from the flagellum.

另外，精子发生过程中还包括染色质浓缩，细胞质和线粒体向细胞核的尾端迁移，在核的后端中轴位置上形成中等大小的核后凹，近端中心粒和远端中心粒的一部分嵌在核后凹之内，短的胞质内陷管将线粒体与鞭毛分隔开。

Ceres series of scientific and technological achievements, the company all staff condensation years of painstaking efforts.

瑞斯科技一系列成绩的取得，凝结了公司全体员工多年的心血。

The advantage of supercritical carbon dioxide used as an environmental medium in polymerization and reactions in supercritical carbon dioxide are described. It includes homogeneous free radical polymerizations, precipitation free radical polymerizations, dispersion free radical polymerizations, emulsion and inverse emulsion free radical polymerizations, cationic polymerizations, ring-opening polymerization, melt-phase condensation polymerizations, sol-gel polymerizations, polymer blend synthesis, catalytic chain transfer polymerizations, oxidative coupling polymerization, nitroxide-mediated radical dispersion, atom-transfer radical polymerization, reversible addition-fragmentation chain transfer polymerization, electrochemical polymerization, simultaneous one-pot combination of enzymatic and chemical polymerization, copolymerization of carbon dioxide used as monomer.

评述了ScCO2作为聚合反应介质的优点，以及在ScCO2中可进行的聚合反应类型，包括均相聚合、沉淀聚合、分散聚合、乳液及反相乳液聚合、阳离子聚合、开环聚合、熔融态缩聚、溶液-凝胶聚合、聚合物混合合成、链催化转移聚合、氧化-偶合反应聚合、氮氧自由基可控活性聚合、原子转移自由基聚合、可逆加成-断裂链转移、电化学聚合、原子转移聚合与酶催化开环聚合两种活性聚合在ScCO2中同时聚合、二氧化碳作为原料共聚合等。

In addition, no change in the characteristic carbon chains of CAWs was detected during the condensation process.

在该巯基化过程中，CAWs的特征碳链结构并未发生可觉察的变化。

Condensation of phenol and chloral over HY zeolite catalysts was studied in detail.

以三氯乙醛为亲电试剂，在HY沸石催化剂上实现了苯酚和三氯乙醛的二次缩合反应。

1 At a reaction temperature of 100 ℃ and a reaction time of 30 min to give 2,which was then subjected to condensation reaction with p-propoxy mandelic acid in the presence of phosphoric acid at a molar ratio of m(2)∶m( p-propoxy mandelic acid )∶m=1∶1∶1 at a reaction temperature of 60 ℃ for 3 h to yield 3,which was further oxidized by chloranil to give t.

对现有分散红356合成工艺进行了优化，以n∶n=1.2∶1投料，100℃反应30 min得缩合物2，再在等质量磷酸催化下与分批加入的等质量对丙氧基扁桃酸60℃缩合3 h得缩合物3，经温和氧化剂四氯苯醌氧化得标题化合物，总收率55%。

Results indicated that the variation was significant from treatment to treatment. S-deficiency caused bulging chloroplasts, loosening and dishevelled grana lamella, reducing organelle, and damaged chondriosome in mesophyll cells of the leaves, and empty cells of the roots, while S-excess, however, led to densification, condensation and randomization of grana lamella of the chloroplasts of the leaves, and separation of cytoplasms from walls of the cells of the roots.

结果表明，受S素营养胁迫的水稻，其根系及叶片的超微结构均发生了显著的变化：低S胁迫会造成水稻叶片叶肉细胞内的叶绿体结构肿胀，基粒片层松驰、散乱，细胞器减少，线粒体结构被破坏，根系细胞内几乎没有内含物；S浓度高则会使叶片叶绿体基粒片层致密、浓缩，无规则化，根系细胞发生质壁分离。

Chromosome condensation is a significant process of cell multiplication and occurs as a prelude to sister chromatid segregation that initiates at the onset of anaphase.

在细胞增殖过程中，染色质集缩是细胞分裂得以正常进行的重要条件，也是后期姊妹染色单体分离的序曲。

The debate has also raised the important issue of how to measure chromatin condensation accurately.

这场争论还提出了重要的问题那就是如何准确的测量染色质凝聚。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。