碳

Nature, most elements have two or more isotopes, the same kinds of elements in the quality of the various isotopes of different, but the types and proportion constant (except for radioactive elements). In 1961, the carbon content of the most abundant in nature, a kind of isotope, carbon-12 atom of a quantity and quality of C as a 12 mass units to it as "benchmarks" for all isotopes of an element according to the average abundance The ratio of the benchmark is the atomic weight of this non-prime, that is listed in the periodic table of atomic weights.

自然界中大多数元素都有两种或更多的同位素，同种元素的各同位素质量不同，但其种类和比例是恒定的。1961年，把碳在自然界含量最丰富的一种同位素，碳12的一个原子的质C量定为12个质量单位，把它作为"基准"，某种元素的所有同位素按丰度的平均值与基准之比，就是这种无素的原子量，即元素周期表列出的原子量。

Soil organic carbon is an important component of the global carbon cycle, and it has direct effects on the global carbon balance.

土壤有机碳库是全球碳循环的重要组成部分，其变化直接影响全球的碳平衡。

Life on Earth is known as carbon based, and carbon is as necessary to the life cycle of Earth's organisms as we are to the carbon cycle.

地球上的生命是被称为碳为基础，碳是必要的生命周期，地球的有机体，因为我们是碳循环。

Radiocarbon dating is basically this: a radioactive isotope of carbon, C-14, is formed in the atmosphere by cosmic rays.

放射性碳测年，基本上这个：放射性碳同位素、碳14是由大气中形成的宇宙射线。

For the forests with high canopy closure, both the annual carbon sequestration and the annual pollutant removal were high; while for those with lower canopy closure, these two characteristics were dependent on the structural complexity of the forests.

不同城市森林类型的碳密度与其结构密切相关，高郁闭度下固碳和污染物净化能力皆高，低郁闭度下固碳和污染物净化能力取决于其结构的复杂程度。

By means of solar energy resources research of xinjiang bazhou and analysis on carbon usage and greenhouse gas emission in carbon metallurgy process, a new concept named "non-carbon metallurgy by solar energy photovoltaic technology" was put forward.

通过新疆巴州太阳能资源调研、碳冶金碳素作用及其温室气体排放分析，提出了太阳能光伏非碳冶金理念，实现太阳能光伏非碳冶金的技术难点在于建立独立的能量——冶金体系。

The Raman spectra of the deposited species did not exhibit thespectral feature of buckminsterfullerene, but the hexagonal graphite and the amorphouscarbon in 〓 hybridization instead. The deposited species were desorbed and mass analyzed.

7经质量选择后的直链碳原子簇沉积在HOPG单晶面后改变了其本身的构型，主要以纯碳簇的形成存在，另外也发现相当一部分碳聚集而成芳香环，由于环状构型存在较多悬挂键，氢原子起到了饱和悬挂键的作用。

In the current study, anoxic dechlorinations of p, p'-DDT,γ-HCH, HCB in the Liao River sediment were studied under the following conditions: without any additional short chain carbon substrates or vitamin B〓; with the addition of short chain carbon sources (including sodium lactate, sodium propionate or sodium acetate); with the addition of vitamin B〓; with the addition of both short chain carbon substrates and vitamin B〓, with the addition of sodium dodecyl sulfate , a kind of surfactant; the coexistence of the three chlorinated compounds.

本文分别采用不外加碳源和维生素B〓外加碳源（包括乳酸钠、丙酸钠或乙酸钠）、外加维生素B〓以及同时外加碳源和维生素B〓的方法，考察了p，p'-DDT、γ-HCH和HCB三种氯代有机污染物单独或混合存在下，在辽河沉积物中缺氧脱氯降解的情况，主要得到以下结论

Carbon alloys are defined as carbon in multi-component systems the components having carbon in different states of hybridisation or in relationship with other compounds.

或者在与其他化合物一起的关系碳合金作为碳在多零部件系统内确定有在hybridisation的不同状态内的碳的零部件。

Total carbon of Station C2-1、S11 and M07 is mainly composed of organic carbon,and this result confirms the conclusion that Chukchi Sea area is an efficient carbon accumulation area.

四个站位的TC含量为0.89%-2.17%，TN含量为0.24-1.66mg/g，TP含量为0.15-0.96mg/g，其中C21、S11和M07的总碳中均以有机碳为主，分析结果证实了楚科奇海区是一个高效的有机碳&汇&区的结论。

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。