碳

It is found primarily in the all-trans configuration in the nature, which has 11 conjugated carbon-carbon double bonds.

在自然界中，它以全反式结构存在，并有11个碳碳共轭的双键。

It is found primarily in the all-trans configuration in the nature, which has 11 conjugated carbon-carbon double bonds.

在自然界中，它主要以全反式结构存在，并有11个碳碳共轭的双键。

PS, NIR, UV and Raman spectra indicated that there was conjugative effect between MWNT and bromine which induced the movement of π electrons from MWNT to bromine to increase the hole carrier density.

光电子能谱、近红外光谱、紫外光谱、拉曼光谱表明多壁碳纳米管与溴之间存在共轭作用，这种作用导致多壁碳纳米管上的π电子向溴偏移，产生空穴载流子。

More clues to Coryphodon's lifestyle came from an analysis of ratios of carbon-13 to carbon-12, which exists in different ratios in various types of plants.

更多与冠齿兽生活习性有关的线索来自对碳-13与碳-12比例的分析，它们在不同类型的植物中有不同的比例。

Aspergillus WQ is selected to explore the factors which affect producing enzymes. The best carbon source is crystallitic cellulose+straw powder, the best nitrogen source is peptone+yeast abstract cream, the best growing temperature is 35℃and the best initial pH is 5.5. WQ can produce the largest quantity of enzymes after being cultivated eight days.

从50℃左右牛粪自然堆肥中筛选了一株产酶量较高的曲霉WQ，对影响其产纤维素酶的因素和酶的热稳定性进行了初步研究，结果表明：液体发酵时，该菌最佳碳源是微晶纤维素+稻草粉组成的复合碳源，最佳氮源是蛋白胨+酵母膏的复合氮源，最适生长温度为35℃，最适起始pH值为5.5，在生长第8天产酶量最高。

The biomass and soil organic carbon stock reduced by 24% and 10% from the first to the second rotation of Cunninghamia lanceolata plantations, respectively, and by 39% and 15% respectively from the second to the third rotation.

地力维护措施可在很大程度上防治连栽人工林生物量和土壤有机碳贮量的下降，2代杉阔混交林生物量和土壤有机碳贮量分别比2代纯林提高69%和19%；2代按树与相思属树种的混交林生物量比2代按树纯林增加29%；施肥可使2代杉木人工林生物量提高22%。

Knoevenagel condensation reaction of aromatic aldehydes with active methylene compounds like ethyl cyanoacetate proceeds smoothly in water in the presence of 8mol% of diammonium hydrogen phosphate and 2mol% TEBA.

醛与活泼亚甲基化合物的 Knoevenagel 反应是有机合成中广泛应用的形成碳碳键的重要方法，该反应一般是弱碱性催化剂存在下完成的，如各类胺、脲[1]等，Lerwis酸[2]、杂多酸[3]、氨基酸[4]等也可用于催化该反应。

Through metallographic examination and microanalysis, it can be observed that at the weld interface of the joints there is a decarbonized layer on the S25C steel side and a carburized layer on the SUS405 steel side.

金相及显微分析可见，在焊接接头的结合界面上，S25C钢一侧存在脱碳层，SUS405钢一侧存在增碳层，这是造成接头组织分布及硬度分布不均匀的主要原因。

Another remarkable characteristic of printing and dye the waste water is that the colour is high, is it adopt biological carbon pool is it is it deal with to decolour to go on to it , for activated carbon absorbent spent to design originally, active charcoal adsorption method to utilize porous active charcoal material make one or many kinds of material of waste water it absorbs to be that surface get rid of in active charcoal.

印染废水的另一显著特点就是色度高，本设计采用生物碳池对其进行脱色处理，所用的吸附剂为活性碳，活性炭吸附法就是利用多孔活性炭物质使废水中的一种或者多种物质被吸附在活性炭表面而去除的。

A mathematical model was developed to investigate the molten steel flow and decarburization process in RH vacuum degasser system under the action of electromagnetic field.

为了了解旋转磁场下真空精炼装置内的脱碳反应，对RH装置内钢液流场与脱碳过程进行了耦合计算；采用修正的均相流模型计算流场，避免了先前的一些不具推广性的方法，如简化计算区域或者预先规定含气率分布等。

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。