碳

To study the changing law of stable carbon isotope composition in cattle tail hair with the change of feeds composition, and to verify each section of cattle tail hair can't exchange with other sections once it is produced, and it contains isotopic information which can reflect the cattle feeds information from the time when it is produced.

研究牛尾毛中稳定性碳同位素组成随饲料改变的变化规律，确证牛尾毛一旦长成，其中的稳定性碳同位素不再与其它部分的进行交换，每段毛发记录的同位素信息可反映毛发生长时的饲料信息。

Deformation greatly promoted carbonitride isothermal precipitation and made C-curve shift leftwards. The position and shape of C-curve depended on the content of Nb and N to a great extent, C-curve shifted leftwards a little when N content increased and its nose temperature was raised with Nb content increased. 3 when cooling rate increased, start temperature and finish temperature of continuous cooling precipitation decreased, full precipitation became difficult to take place, the volume fraction of carbonitride precipitation decreased, molar fraction of Nb and C dissolved in austenite increased, and the precipitation grain was further refined. Deformation shorten precipitation start time during continuous cooling, raised precipitation start temperature, accelerated precipitation kinetics of carbonitrides.

计算表明：1在Fe—Nb—C系统中，随着温度的降低，析出相的平衡体积分数增加，溶解在奥氏体中的Nb、C的摩尔分数降低，析出相中C和Nb的原子分数的比值v增加；2变形大大促进了碳氮化物的等温析出，使C曲线左移，Nb和N的含量与C曲线的位置和形状有一定的关系，N含量的增加，使C曲线略有左移，而Nb的含量的增加使得C曲线的鼻子区上移；3随着冷却速率的增大，连续冷却析出的开始温度和结束温度均有所降低，并且析出变得越来越不充分，析出相体积分数明显减小，溶解在奥氏体中Nb和C的摩尔分数增大，析出相粒子被明显细化，变形大大缩短了CCP过程碳氮化物析出的开始时间，提高了析出的开始温度，促进了析出动力学。

Using limekiln gas which was exhausted during theprocess of producing calcium carbide to reaction with water glass, did single-factor experiments and discussed the effect of factors on carbonization process, ratio of production and performance of product ,such as temperature and time of reaction, the density of raw material and carbon dioxide etc.

利用电石生产排放的含二氧化碳的废气—石灰窑气和水玻璃进行碳化反应，进行了单因素试验，探讨反应温度、反应时间、原料配比及二氧化碳浓度等因素对碳化过程、产率及产品性能的影响。

Compared to SOC density in the dry land, SOC density in paddy soils was 13 percentages higher with a lower variation coefficient between different regions.

不同用地方式下，水田耕层有机碳密度比旱地的平均高13个百分点，但水田有机碳密度的区域变异显著低于旱地。

In fact, if you go without carbohydrates for too long, your metabolism could decrease because carbohydrates are the main macronutrient that influences the thyroid gland.

如果你长时间不食用含碳水化合物食品，你的新陈代谢就会减少，因为碳水化合物是影响甲状腺的主要营养物质。

The invention relates to a low-carbon magnesia carbon brick as well as a preparation method thereof.

本发明涉及一种低碳镁碳砖及其制备方法。

The nitrogen removal rate by using succinate and acetate was significantly higher than that by using malate.

以丁二酸盐和乙酸盐作为碳源时，其脱氮效果均要明显好于苹果酸盐作为碳源。

The paper mainly aimed at the growth of black spot disease of Araliaceae has conducted the systematic research under the different carbon and nitrogen source, grasped the most suitable carbon source for the growth of Black spot disease of Araliaceae,which was the strongest than mannitol, fructose, complete glucose, sucrose, malt sugar, lactose, starch, dextrin.

本论文主要针对刺五加黑斑病菌在不同碳源和氮源处理条件下的生长情况进行了较系统的研究，掌握了对刺五加黑斑病菌最适合生长的碳源为对照强于甘露醇，强于果糖，强于完全葡萄糖，强于蔗糖，强于麦芽糖，强于乳糖，强于淀粉，强于糊精。

This paper analyses the characteristic of medium carbon steel containing manganese and the demand to casting powder.

通过对中碳锰钢钢种特点及其对保护渣要求的深刻剖析，结合包钢的生产实际，对方、圆坯中碳锰钢生产所用保护渣的使用性能和理化性能进行了综合分析研究。

The quantities of the carbide in these samples were determined by gas mass spectrometer.

本文讨论碳—铝复合丝高温浸渍中的行为，在高温下碳纤维和铝发生了界面反应，反应形成了碳化铝脆性层。

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。