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- The steric hindrance effect was strong about the influence of constructure of alcohols on the esterifications . 在优化反应条件下;乙酸正丁酯的平均酯化率为97.;8%25
- The DLVO theory discloses effect of dielectric constant of organic reagent and steric hindrance effect is the main factors for nucleation. 通过DLVO理论分析表明，有机试剂的介电常数以及空间位阻效应是影响晶核形成的主要因素。
- Keywords aromatic aliphatic copolyamide;melting temperature;hydrogen bond;chain composition;steric hindrance effect; 芳-脂族共聚酰胺;熔融温度;氢键;链组成;空间阻碍;
- steric hindrance effect 立体位阻效应
- For a nucleophile, its regioselectivity is also controlled by both steric hindrance and electronic effect. 对于亲核试剂，一般的亲核试剂也同时受电子效应和空间效应的影响；
- The dependence of chain scission and racemization on temperature results from molecular motion, "cage effect" and steric hindrance during recombination. 分子量降低和消旋作用对温度的依赖性,是由于分子运动和笼罩效应以及重合的空间位阻效应所致。
- Influence of the steric hindrance, solvent effect and porous supporters etc. on o/p isomers ratio in the mononitration product of toluene have been investigated, some experimental results were given. 研究了利用立体位阻、溶剂效应、多孔载体等对有效降低甲苯一段硝化产物邻对位异构体比例的影响,文中给出了部分实验结果。
- Macromolecules cannot approach the ligand owing to steric hindrance of the matrix. 由于载体的立体位阻的关系，大分子化合物不能接触到配基。
- The stereoselectivity was improved by increasing steric hindrance of the reactions. 通过增加反应的空间位阻改进了反应的立体选择性。
- Due to the steric hindrance, grafting PEG through Tris didn’t improve the protein resistant property as we expected. 间隔基tris对于PEG改性效果的影响研究表明，由于空间位阻效应的影响，tris接枝后的表面并没有由于官能团的增加而提高PEG在表面的接枝密度。
- MP1 and MP2 exhibited high thermal stability, while MP3 is not stable enough because of steric hindrance. 由于MP3的位阻较大，因而热稳定性能较差，而MP1和MP2都具有较高的热稳定性能。
- In the synergetic agent, there must be a functional group possessingstrong coordination ability without steric hindrance. 协萃剂结构不仅要求无空间位阻,而且具有强的配位基。
- The blending system has a better compatibility with 1227 when the anionic surfactant contains polyoxyethylene chain as well as the hydrophilic group of big steric hindrance of. 分子中既含聚氧乙烯链,又具有较大空间位阻亲水基(琥珀磺酸酯)的阴离子表面活性剂与阳离子表面活性剂1227具有较好的复配相容性。
- Bi-functional reactive dyes can form crosslink age among the Chitosan fibers, especially the two functional groups located at different end owing to small steric hindrance. 双活性基染料可在甲壳胺纤维大分子间形成交联，其中双侧型双活性基染料空间效应小，交联程度相对较高。
- As steric hindrance of the aryl amine decreased and nucleophilicity increased, occurrence of the transfor-mation reaction increased and herbicidal activity of the product decreased. 芳胺空间位阻越小,亲核性越强,副反应越容易发生,产物除草活性越低。
- HTMA cured with epoxy resin gently and slowly, owing to the synergistic effect of sterie hindrance effect and stereo-electronic effect. 空间位阻效应及电子效应的协同作用使HTMA与环氧树脂的固化反应速度降低，固化过程中放热量小，放热平缓。
- The results indi-cate that increase of basicity and steric hindrance of ligand,and selectingsuitable transitional metal may increase selectivity and activity of polymericcatalysts. 实验结果说明;增加配位体的碱性和位阻; 选择合适的过渡金属都能提高催化剂的选择性.
- Aminoacids that cannot fit into the editing site would be rejected because they are either toosmall to bind tightly at the active site (such as Ala) or have steric hindrance with thesurrounding residues (such as Leu). 不适合进编校位点的氨基酸将会被排斥掉,因为它们要么太小以至于不能紧密结合在活性位点(比如Ala) ,要么和蛋白质上口袋中活性位点周围的氨基酸残基有立体化学位阻(比如Leu)。
- The GC-MS analysis result of the coke on the deactivation catalyst shows that the dominating reason of inactivation is the hindrance effect of the carbons in the inactive Beta Zeolite. 结炭物质中，分子较大的连体双环、中间有亚甲基的长链双环和多环芳烃等物质的位阻效应是催化剂失活的主要原因。
- It has hindrance effects to anaerobism.The pretreatment also deal with suspended substance. 悬浮物（ss）suspended substance: 对厌氧有阻碍 预处理亦要处理ss。
