碳

The asymmetric aldol reaction is one of the most important methods of forming carbon-carbon bonds.

不对称羟醛缩合反应是有机合成中立体选择性地形成碳碳键的最重要方法之一。

In order to determine the carbonation interface properly, Alizarin yellow R is chosen as the acid base indicator.

研制了新的具有球形凹面的混凝土试块及相应模具，实现了混凝土碳化试块的非破坏测试；选择了茜素黄R作为酸碱指示剂，合理地确定了检测时的碳化界面。

Owing to its effect of the surface and intrinsic lacuna, carbon nanotubes have perfect reactive ability than other allotrope of graphite.

碳纳米管的表面效应和管壁中存在有大量的拓朴学缺陷，使碳纳米管的表面本质上比其它的石墨变体有更大的反应活性。

As the fourth allotrope of condensed carbon, the carbon nanotubes have been attracted more and more attention and applied widely in many fields owing to their quasi one-dimensional infinite nanostructures and unique mechanics, electron transport and gas adsorption properties.

碳纳米管(carbon nanotubes，CNTs)作为碳的第四种同素异形体，由于其准一维的管状纳米结构，以及独特的机械、电子传导、气体吸附等性质，越来越被人们所关注和研究，并已在多种领域得到广泛的应用。

It generally refers to the carbon structural steel and medium carbon alloy steel.

它一般是指中碳结构钢和中碳合金结构钢。

Habitual organisms in north of East China Sea and alongshore estuarine water areas were measured by different methods mentioned above in order to understand the role of diverse aquatic species composing specific food webs and their control on the flow of matter and energy along the food chain.

建立特定化合物稳定同位素技术测定单分子脂肪酸碳稳定同位素的方法，并选取研究海域内采集的部分生物样品，测定其特征脂肪酸的碳同位素比值，从分子水平构建食物网中主要生物的摄食关系。

The high-correctness C/O energy spectrum logging system features use of fast neutron in deuterium and tritium reaction along with alpha particles flying technique to log, and is composed of neutron counter tube accompanied by alpha particles test system, neutron shielder, gamma ray detector, fact electric timer and computer for data acquisition, processing and control.

本发明提供一种高准确度的碳／氧比能谱测井系统，该系统是将氘氚反应快中子伴随α粒子飞行时间技术用于碳／氧比能谱测井，包括具有伴随α粒子探测系统的中子管，中子屏蔽体，γ射线探测器，快电子学定时部件以及数据获取、处理和控制计算机。

Here we used ferrocene , xylene and argon as the catslyst precursor, carbon source and carrier gas, and used alundum tube as reaction chamber.

以二茂铁、二甲苯、氩气分别为催化剂先驱体、碳源、载气，直径100mm的刚玉管为反应室，石英玻璃为基底，催化热解制备定向碳纳米管。

Eight conodont zones and six ammonoid zones are consequently well distinguished in the Lower Triassic of Chaohu, and most of them are regionally or even globally correlative. The δ^13 C, excursion shows two characteristic shifting periods, and this carbon isotope sequence is not only of a stratigraphic value but also of great importance to understanding the biotic recovery and ecosystem reconstruction at the beginning of the Triassic.

巢湖的下三迭统明确包含8个牙形石带和6个菊石带，它们具有区域甚至全球对比意义；巢湖地区早三迭世碳同位素δ^13 C的演变呈现2个显著的漂移周期，这种有特色的碳同位素漂移，不仅具有地层学价值，而且可能对于三迭纪初的生物复苏和生态系演变具有指导意义。

In order to decrease the production cost of Microbial Flocculant M-25, the amylum and urea were developped for the cheap substitutes of carbon source and nitrogen source of Charls medium.

为了降低微生物絮凝剂M-25的生产成本，以查氏母液为基础，采用替代碳源和氮源的方法，开发出了廉价的替代碳氮源：淀粉和尿素。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。