碳的

Carbons 1 and 2 are substituted by fatty acids and carbon 3 by phosphorylcholine.

在1位和2位碳原子上的羟基被脂肪酸取代，3位碳原子上的羟基被磷酸胆碱取代。

This thesis is concerned with studies on the ring opening reaction catalyzed by gold catalysis via carbon-carbon bond cleavages.

本文主要研究了金催化碳碳键断裂的开环反应，全文共分为三个部分：第一章：对均相金催化研究进行了总结，综述了均相金催化的研究进展。

Change regulation of the electronic properties of carbon nanotubes is investigated under different temperatures when carbon nanotubes,prior to annealing under high temperature and vacuum conditions,adsorbs and desorbs ethanol steam.

研究了不同温度下，未经高温真空退火的碳纳米管吸附和解吸乙醇蒸汽时，碳纳米管电学特性的变化规律。

The technological scheme is that under the conditions one reaction temperature 40-200 deg.c, reaction pressure from normal pressure to 6.0 MPa and reaction velocity of 0.5-3/hr, C4 mixture as the main material is made to contact with catalyst to produce isooctene. The production process may be used in industrial production of selective C4 mixture dimerizing process to prepare isooctene.

本发明通过采用以混合碳四为原料，在反应温度为40～200℃，反应压力为常压～6.0MPa，反应液体体积空速为0.5～3小时-1条件下，反应原料与催化剂接触生成异辛烯的该技术方案较好地解决了上述问题，可用于混合碳四选择性二聚制异辛烯的工业生产中。

Effects of different carbon,nitrogen source and inorganic salt on the production of elastase were studied.

针对不同碳氮源及无机盐对芽胞杆菌EA915产弹性蛋白酶的影响进行了研究，结果表明，最适碳源为葡萄糖，最适氮源为酵母膏，无机盐硫酸镁，硫酸亚铁对弹性蛋白酶的产生有促进作用。

By analysing one fire accident in the butadiene extraction plant of Lanzhou Petrochemical Company, this paper establishes a fault tree of fire accidents of the plant.

本文根据兰州石化公司碳四抽提装置的一起着火事故，编制了碳四抽提装置的火灾事故树。

Careful research on friction materials has been done around the word for many years and the present system include materials mainly consist of polymer matrix, powder metallurgy friction materials and C/C friction materials.

多年来，国内外对摩擦材料进行了广泛的研究，主要形成了有机合成摩擦材料、粉末冶金摩擦材料和碳/碳复合摩擦材料为主的体系。

Fullerene oxides played an important role in studying functionalization of carbon clusters, which stimulated the interest of scientists.

碳笼氧化物对碳笼的官能团化研究具有重要意义，因而激起了人们广泛的研究兴趣。

In the fourth chapter, the techniques of N2 adsorption and TPD were used to examine the texture and surface chemical properties of activated carbon before and after treatment of nitric acid and air oxidation, and effects on the performance of gas diffusion electrode were also studied.

在第四章中采N_2吸附和TPD法详细研究了硝酸氧化和空气氧化处理对活性碳孔结构和表面化学性质的影响，考察了活性碳性质与气体扩散电极性能之间的关系。

AIM A new process to prepare the glycerides of eicosapentaenoic acid and docosahexenoic acid from purified ethyl esters of EPA and DHA.

目的：用高纯度的二十碳五烯酸乙酯和二十二碳六烯酸乙酯制备EPA、DHA甘油酯的工艺。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。