羟基

High performance liquid chromatography was used to detect concentration of BP in the air of working sites and level of urinary 1-hydroxypyrene (1-OH-Py) of workers. Contents of acetylcholine in blood filtrate and activities of erythrocyte acetylcholinesterase were determined by Alky hydroxylamine chromatometry and DTNB methods, respectively.

用高效液相色谱法测定各组工作场所空气中BP的浓度，并对工人尿中1-羟基芘(1-OH-Py)的水平进行检测；分别用碱性羟胺比色法和二硫代二硝基苯甲酸法测定全血滤液中乙酰胆碱的含量和红细胞乙酰胆碱酯酶的活性。

Novel chitosan derivative with long alky groups as the hydrophobic moieties and carboxymethyl groups as the hydrophilic moieties was synthesized. The chemical structure of N-octyl-O, N-carboxymethyl chitosan was characterized via FTIR, 1H NMR and elemental analysis. The physical properties were analyzed with wide angle X-ray diffraction and differential scanning calorimetry.

以天然可生物降解的壳聚糖为原料，通过在壳聚糖6位羟基上引入羧甲基，在2位氨基上引入疏水烷基链，制得N-辛基－O，N-羧甲基壳聚糖两亲性衍生物，分别用FTIR、1H NMR和元素分析等技术对其结构进行表征，用广角X射线衍射和差示扫描量热法对具物理性质进行分析，并考察其在各种溶剂中的溶解性能及其对难溶性药物的增溶能力。

Determination of total content of rare earth in rare earth drier and content of hydroxyl in solvent- free alkyd resin are introduced and then compared with the traditional methods.

介绍了稀土催干剂中总稀土含量和无溶剂醇酸树脂中羟基含量的测定，并和传统方法作了比较。

And it is known to alkylate DNA preferentially at guanine N7 position, causing intra-or inter-strand cross-linking of DNA and interfering with DNA replication and DNA-directed RNA synthesis.

我们采用Rhodamine B降解法得到了药物在抗坏血酸的协同下产生羟基自由基的信号，从而进一步证实了药物以氧化切割的方式断裂核酸。

After hydrogenation of the double bond and the addition of alkyne to a carbonyl we introduced the N-hydroxy group by SN2 reaction.

不对称氢化和炔负离子对羰基的立体选择性加成构建了两个新的手性中心，之后用羟胺衍生物对羟基的SN2取代反应引入了羟胺片断。

The products are methyl vinyl ether (cis- and trans-), allyl alcohol and propen-2-ol.

计算得到的丙酮分子的5个异构化反应通道分别对应3种异构化产物，乙烯甲基醚、丙烯醇和1-丙烯-2羟基。

In the first part, we studied the possibility of allyl as the protection group of the hydroxyl in nucleosides.

烯丙基作为糖化学中的一种常用保护基在核酸化学中有一定的应用，曾有人将它作为磷酸酯键及碱基环上羰基的保护基，但作为核苷糖环羟基的保护基还未有研究。

Allylic side chain was modified to give six bayin analogs in which compound I has a free 7-hydroxy group.

修饰8-位烯丙基侧链，得到了六个黑豆素类似物，共中8的7-位为游离羟基。

Objective:To explore the cardiac toxicity in rats exposed to aluminum chloride(AlCl3),and the inhibition of 1,2-dimethyl-3-hydroxy-4-pyridone.

目的：研究氯化铝(AlCl_3)染毒对大鼠心脏的毒性及铝螯合剂1，2-二甲基-3-羟基-4-吡啶酮的保护作用。

ObjectiveTo explore cardiac toxicity in rats exposed to aluminum chloride (AlCl3), and to evaluate the protection of 1,2dimethyl3hydroxy4pyridone against toxicity.

目的研究氯化铝（AlCl3）染毒对大鼠的心脏毒性及铝螯合剂1，2二甲基3羟基4吡啶酮的保护作用。

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。