去氧

The glycidol is protected by ethyl vinyl ether first to form 2,3-epoxypropyl-1-ethoxyethyl ether, then polymerized or copolymerized with EO by initiation with the mixture of diphenylmethylpotassium and triethylene glycol to give the well-defined poly.

得到的聚合物用甲酸水解去保护，并在二氧六环和甲醇的混合溶剂中用氢氧化钾溶液皂化后，得到了聚合物链的侧端挂有羟甲基官能团的线形聚醚linear Polyglycidol和poly。

Both star copolymer precursors are hydrolyzed in the acidic conditions, then the corresponding recovered star copolymers of EO and glycidol with multi pending hydroxylmethyls are esterified with 2-bromoisobutyryl bromide to produce the ATRP macroinitiators with multi pending bromoisobutyryl groups . Then the latters initiate the polymerization of styrene to form the corresponding amphiphilic three- and four-arm star PEO-g-PS.

在阴离子共聚EPEE单体和环氧乙烷单体的过程中，通过变换引发剂体系中的醇的结构(由原来的二元醇变成多元醇，如三羟甲基丙烷和季戊四醇)，合成了星形结构的共聚物，通过水解反应脱去保护基团后，再与2-溴异丁酰溴反应，得到链的侧端挂有很多2-溴异丁酸酯基的星形大分子引发剂，通过ATRP聚合机理引发苯乙烯聚合得到PEO为主链，PS为侧链的星形一接枝共聚物。

Sinomenine,7,8-didehydro-4-hydroxy-3,7 -dimethoxy-17-methylmorphinan-6-one,an isoquinoline alkaloid isolated from the stem and root of the Chinese medicinal herb, Sinomenium acutum Rehd.

青藤碱即7，8-二去氢-4-羟基-3，7-二甲氧基-17-甲基-9α，13α，14α-吗啡烷-6-酮是从植物青风藤Sinomenium acutum Rehd。

The initial three chapters of this dissertation aim to improve the regularity of ladderlike polysiloxane through strong H-bonding template and slowly dropping half water for hydrolysis and condensation.

本论文前三章旨在利用强氢键模板作用和半水量水解同步缩合脱氯化氢的改进方法首次合成了(1)高规整性、可溶的反应性含对苯二胺有机桥基的聚氢基硅氧烷高分子，29Si-NMR 图中显示梯形主链上硅原子-Si(HO2/2峰的基线宽度△1.0 ppm，这是至今文献报道的所有梯形聚硅氧烷规整性最好的数据；采用分段去撑法成功的合成了纯无机梯形聚氢基硅氧(来源：1bABC论文网www.abclunwen.com)烷。

Objective To observe the therapeutic and side effects of chemotherapy in combination with Idarubicin on acute lymphoblastic leukaemia.

目的 观察含去甲氧柔红霉素化疗方案治疗急性淋巴细胞白血病的疗效及副作用。

In our second experiments, we attempted to ascertain whether the similar neuropathological changes can be produced in rats following chronic hypobaric hypoxia.

故在我们第二部份的研究上我们尝试去确认老鼠在长期低压低氧后是否会产生相同的神经病变。

In this paper the sulpho nitro oxy carburizing and the hydrogen removing technology of round broach, the structure of diffusion layer and the relation between the depth, properties, the hydrogen content of diffusion layer and the service life of the broach are studied.

研究了连杆圆拉刀的氮碳硫氧共渗与去氢处理工艺，以及渗层组织结构、层深度、能、层含氮量与拉刀寿命的关系。

PK values of 3-ethoxy-N-desmethyldiazepam (3-EtO-NDZ) in ethanol and acetonitrile containing various concentrations of sulfuric acid, determined by spectrophotometry and spectropolarimetry, were found to be 3.4 and 0.63 respectively. Temperature dependent racemization of enantiomeric 3-EtO-NDZ in ethanol containing various acid concentrations was studied by monitoring changes of ellipticity at 365 nm as a function of time on a spectropolarimeter.

3-乙氧基－N去甲基安定（3-EtO-NDZ；diazepam=安定）在含不同硫酸浓度的乙醇和乙腈中的pK值用光谱法和旋光光谱法作了测定，其结果分别为3.4和0.63.3-EtO-NDZ之对映异构体在含各种不同酸浓度的乙醇中与温度相关的消旋过程，用旋光光谱仪选择其圆二色谱在365nm波长处强度的改变为时间函数的方法作了测定。

And 5. 4～8. 5‰, respectively. Nonequilibrium oxygen isotope fractionation between rock-forming minerals and the low H〓O content indicate that depletion in D-〓O of the A-type granites from eastern China is the result of magma degassing and subsolid interaction between meteoric water and rocks.

主要造岩矿物对氧同位素不平衡分馏和全岩低水含量特征指示中国东部A型花岗岩D-〓O亏损主要受岩浆去气作用和岩浆期后大气降水亚固态交换的制约。

Their structures were characterized as usnic acid,evinic acid,perlatolic acid,olivetoric acid,2-hydroxyl-4-methoxyl-6-pentyl benzoic acid and 2,4-dihydroxyl benzoic acid,respectively.

结果从太白花的石油醚部分得到6个化合物，分别鉴定为：松萝酸、去甲环萝酸、珠光酸、漂红梅衣酸、2-羟基-4-甲氧基-6-正戊基苯甲酸和2，4-二羟基-6-正戊基苯甲酸。

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。