羟基

At the same time,these usual preparation methods are compared and some main problems and development direction at future about nano- hydroxyapatite material are pointed out.

同时，对常用制备方法进行了比较，指出了目前纳米羟基磷灰石粉体制备存在的问题及今后的发展方向。

But the safe study of Nano- hydroxyapatite in blood is the key link to come true clinical application which is reported lesser currently.

而纳米羟基磷灰石在血液中的安全性研究是其实现临床应用的关键环节，并且当前在这方面的研究报道较少。

Learn aminolysis of hydroxyl group on aromatics, including the aminolysis of phenol and naphthol.

了解芳环上羟基的氨解，包括苯系酚和萘系酚的氨解

The thesis focuses on the study of the reactions of hydroxyurea, a novel salt free agent, with uranium, neptunium and plutonium in order to investigate the possibilities of its application in the Purex process(1B) for uranium and plutonium separation.

本论文重点研究了一种新型无盐试剂—羟基脲与铀、镎、钚相互作用的化学，旨在研究这种新型无盐试剂在Purex流程铀、钚分离段(1B)中应用的可能性。

Biological assays for several PAHs containing hydroxy and nitro group indicated that they could protect human red blood cells from hemolysis induced by AAPH and displayed effect of inhibitory for damage of DNA in vitro. They were found to have cytostatic and cytotoxic activity for HL-60 cell lines.

所考察的含有羟基和硝基的多环芳烃化合物对自由基诱导的人血红细胞溶血有一定的抑制作用，对AAPH诱导的DNA损伤有不同程度的保护作用，且它们的抗氧化活性与硝基取代基之间表现出一定的构效关系。

The hydroxy and nitro-substituted coumarins were able to inhibite hemolysis of human red blood cells and damage of DNA induced by AAPH. It reveals that these compounds are effective antioxidants. Some coumarins have cytostatic and cytotoxic activity for HL-60 cell lines. In general, their effects were weakened when coumarins own nitro group.

含有羟基和硝基的香豆素衍生物对自由基诱导的人血红细胞溶血有一定的抑制作用，且对AAPH诱导的DNA损伤有不同程度的保护作用，部分香豆素衍生物对人早幼粒白血病细胞（HL-60）的增殖表现出一定的抑制作用。

Nitrations of both hydroxyl- and acetamino-substituted porphyrins were found to take place at the adjacent position of the substituent in the very aryl ring, whereas nitro group was guided into para positions of unsubstituted phenyl ring during the nitration of nitro-substituted porphyrin.

结果表明，羟基和乙酰氨基卟啉的硝化反应发生在与该取代基处于同一芳环的meta位，而硝基卟啉进行硝化时，硝基取代于其他未取代苯环的para位。

The remaining three groups were given a chemical, N-butyl-N-(4-hydroxybutyl) nitrosamine in drinking water, which induces bladder cancer.

其余三组则获得化学， N -丁基的N -（ 4 -羟基）亚硝胺在饮用水，诱发膀胱癌。

Nitro derivatives of phenols, the pyrolysis initial reaction is an isomerization reaction It meansthe O-H bond in hydroxide rupture, then the Hydrogen atom transfer to the Oxygen atom in nitryl to form isomer.

苯酚的硝基衍生物的热解引发反应为异构化反应——酚羟基中的氢氧键断裂，氢原子迁移到邻位硝基(-NO_2)中的氧原子上，形成新的异构体化合物。

The Molar conductivity indicates that all the complexes are nonelectrolyte. IR spectra show the ligand is bonded with RE ion through its oxygen atom in hydroxyl group of phenol; NO3 is coordinated as a symmetrical chelating bidentate group; the coordinated atoms of DMF and DMSO are the oxygen atoms in carbonyl and sulfoxyl groups. Fluorescence spectrum suggests that the Tb3+complexes have characteristic luminescence and its fluorescence intensity is enhanced after doping with La3+, Gd3+, Y3+, influence of doping ions and neutral ligands have also been discussed.

摩尔电导率表明，所有配合物均为非电解质；红外光谱及核磁共振氢谱表明，对叔丁基杯[8]芳烃通过酚羟基的氧原子与稀土离子配位；硝酸根为双齿螯合配位；DMF和DMSO则分别通过羰基氧和亚砜基氧与稀土离子配位；配合物的荧光光谱表明，所有Tb的配合物具有较强的特征荧光，掺杂La~(3+)、Gd~(3+)、Y~(3+)离子对Tb~(3+)的荧光有较强的增强作用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。