| 1. | P - or o - hydrogen atom of phenolic group
酚羟基的邻位或对位氢 |
| 2. | Objective to improve the preparation of estrogen 3 - methyl ether
摘要目的改进雌激素类化合物3位酚羟基的甲醚化工艺。 |
| 3. | The results show the relative reactivities of three second hydroxyl groups on steroids skeleton of methyl cholicate are different to the three kinds of acylating agents
结果显示，与三种活性不同的酰化试剂作用时，胆酸甲酯分子甾体骨架上三个仲羟基的相对反应活性不同。 |
| 4. | Acylation activity of hydroxyl groups in methyl cholicate has been determined by the use of methacryloyl chloride , methacryloyl anhydride and methacrylic acid as the acylating agents
以甲基丙烯酰氯、甲基丙烯酸酐和甲基丙烯酸作酰化剂，研究了胆酸甲酯分子中羟基的反应活性。 |
| 5. | And tg - dsc . 3 . n , n ' - disalicylidenedianilines and its transition metal complexes of nicl2 6h2o are synthesized by liquid and solid state reaction at room temperature , and their thermochromism are investigated by ir , far i . r
文中的配合物就是其中之一，中心离子是与c = n双键的n原子以及苯环上邻位的羟基的氧原子同时进行配位的。 |
| 6. | Xps showed that there were much chemical absorbing water on the ti _ ( 2 ) film surface which mainly existed in form of - oh , and the contents of - oh was increasing with the annealing temperature . hydrophilic property became better with the annealing temperature ; the essential relation between the changing of contact angle and light - induced - electrons and light - induced - cavities was studied in details . the photocatalysis of samples without heat treatment was very bad , but that of samples after heat treatment was much better
Xps的分析表明：试样的表面含有大量的化学吸附水，主要以羟基的形式存在，随着热处理温度的升高，吸附羟基的含量在增加；亲水性能测试表明：随着氧气分压的变化，其亲水性能变化不大，随着热处理温度的增加，试样的亲水性能在变好，并从理论上解释了亲水性能光照前后变化和光生电子?空穴对之间的本质关系。 |
| 7. | The development of a two - component elastic polyurethane sealing material for the anti - seepage of channel is described herein , and then the performed polymer structure , the molar ratio of iaocyanate to hydroxide radical and the effects from the components of the compounded curing agent on the performance of the material are discussed as well
摘要介绍了一种用于管道防渗止水的双组分聚氨酯弹性密封材料的开发，并讨论了基剂预聚体聚合物结构、异氰酸酯和羟基的摩尔比以及复合固化剂组分对材料性能的影响。 |
| 8. | The expression vector prep9 was employed for the effective expression of ugt1a9 in chinese hamster lung cells ( chl ) . the cell lines established were used for the study of glucuronidation in vitro , and the drug metabolism characteristics were summarized . as has been indicated that ugt1a9 mainly glucuronide hydroxyl , compounds that have aliphatic or phenol hydroxyl were selected for substrates of ugt1a9
由于botiag主要催化羟基的们醛酿缀合反应，本实验选择具有不同结构类型的含羟基化合物作为底物，一类是羟基处于芳环的异丙酚和扑热息痛，其中异丙酚是gylag的专属性底物，可以作为活性比较的参照，另一类是羟基处于脂链的普荚讫尔和普罗帕酮 |
| 9. | By observing the effect of acidity on the uv difference spectra of ehpg or hbed , the spectral characteristics of apoovotransferrin binding to metals and anions at ph 7 . 4 show that the reaction of apoovotransferrin with metals is related to deprotonation of the phenolic group of tyrosine of the metal binding sites , while the binding of apoovotransferrin to anions is associated with the protonation of the phenolic group of tyrosine of the anion binding sites
摘要通过观察酸度对模拟转铁蛋白小分子ehpg和hbed紫外差光谱的影响，结合脱铁伴清蛋白与金属离子、阴离子结合的光谱特性，推断脱铁伴清蛋白与金属离子的结合导致金属离子结合位点处酪氨酸酚羟基的去质子化，而与阴离子的结合导致阴离子结合位点处酪氨酸酚羟基的质子化。 |
