碳

From the research of the kerogen carbon isotopes of the coal-measure strata in some basins of China (the Carbo-Permian in the Ordos basin, the Triassic in the Sichuan basin, the Jurassic in the Jungar basin and Turpan-Hami basin, the Tertiary in the Yingqong basin) it can be indicated that the Type Ⅲ kerogen has a wide δ〓C range from -21. 2‰ to -27. 6‰, averaging -25‰, which is more enriched in 〓C than sapropel and mixed kerogens.

对我国一些含煤盆地（陕甘宁石碳－二叠、四川三叠系、准噶尔侏罗系、吐哈侏罗系、莺琼盆地第三系）的煤系地层干酪根碳同位素研究表明，煤系地层的干酪根碳同位素组成δ〓C值分布范围为－21.2～－27.6‰，说明其变化范围较宽，平均值为－25‰左右，相对腐泥型干酪根和混合型干酪根较明显地富重碳同位素。

With the parameters from published literature and experiments, we conducted forward analysis to compare soil organic carbon, carbon sequestration rate and soil total nitrogen dynamics of four different ecosystem types bare ground, Scirpus mariqueter, Phragmites australis, S.

通过构建九段沙生态系统碳氮模型并结合实测数据比较了互花米草入侵后生态系统土壤有机碳储量、碳封存速率和土壤总氮与其在土著占优势的3类生态系统（裸地、海三棱藨草、芦苇）中的差异，结果表明互花米草入侵的生态系统，其土壤有机碳储量高于裸地和海三棱藨草生态系统，却低于芦苇生态系统。

The geometric optimization of C_(59)Sm and C_(60)Sm shows that the replacement of a C atom with a Sm in C_(60) yields a stable substitutionally doped fullerene C_(59)Sm, and among the five possible optimized geometries for C_(60)Sm, the most favorable exohedral sites are above the center of a hexagon and a pentagon ring.

替代掺杂富勒烯C_(59)Sm与外掺杂富勒烯C_(60)Sm几何结构与电子结构分析表明，以Sm原子取代C_(60)分子中的一个碳原子后碳笼仍保持稳定的替代结构，而对五种可能的C_(60)Sm结构，Sm原子倾向于栖息在六碳环与五碳环的空洞上方。

Especially, the difference of the nearest-neighbor hopping integral is due to the effect of the curvature of the carbon nanotubes. So, in fact there is a very narrow energy gap near the Fermi energy of unsquashed metallic zigzag carbon nanotubes, and, a slighter deformation is required to open a considerable energy gap in metallic zigzag carbon nanotubes than that in armchair nanotubes.

特别是，最近邻格点之间的跃迁积分的变化与碳纳米管的曲率紧密相关，因此实际上，理想金属型 zigzag 碳纳米管本身具有微小能隙，而施加比 armchair 碳纳米管小的多的压缩量，就可以使金属型 zigzag 碳纳米管在费米能处打开相当的能隙。

Particularly, the neutral anion fluorescence chemical sensor uses cholic acid molecules as the molecule frame, and introduces a neutral thiourea or ureido to the positions of a 3 bit carbon atom and a 24 bit carbon atom to be used as a bonding unit; a fluorescence chemical functional group is introduced to the positions of the 3 bit carbon atom and the 24 bit carbon atom or to other positions and used as a signal unit, and then a neutral anion fluorescence chemical sensor is synthesized.

具体而言是以胆酸分子为分子骨架，在其3位碳原子和24位碳原子上引入中性硫脲或脲基，作为键合单元；在3位碳原子和24位碳原子上或其他位置引入具有荧光化学官能团，作为信号单元，合成中性阴离子荧光化学传感器。

The effects of the ratio of carbon source,nitrogen source and concentration of ethanol in the medium on the productivity of polysaccharide-peptide by Coriolus versicolor were studied during the shaking flask liquid fermentation.

通过液体发酵的摇瓶实验，考察碳源、氮源、碳氮比和乙醇浓度对云芝糖肽的产率影响，确定葡萄糖和玉米淀粉为适宜碳源，蛋白胨和黄豆饼粉为适宜氮源，合适的碳氮比为20∶1，适宜的乙醇体积分数为1.5%。

The particular preparation procedure is as follows: preparing a carbon nanotube with carboxyl by acidulating the carbon nanotube; Preparing the carboxylic carbon nanotube/nylon 66 composite material by polymerizing the carboxylic carbon nanotube and the raw material (such as polybasic acid and polybasic amine) which is used for preparing the nylon 66 through in situ polymerization.

具体步骤为：通过对碳纳米管进行酸化，制备携带羧基的碳纳米管。通过原位聚合法将羧基化碳纳米管与制备尼龙66的原料进行聚合，制备羧基化碳纳米管/尼龙66复合材料。

What's more, if you quit getting enough of them, your body will start cannibalizing your muscle. That's right -- not eating carbs IS bad for you! And once a low-carb dieter caves to cravings, the sugar binge that ensues often lasts for days.

所以不吃碳水化合物是不对的，低碳水化合物减肥会让你更加想要吃东西，比如所有的碳水化合物，而且容易暴饮暴食高碳水化合物的东西，蛋糕阿，饼干阿，而且会吃几天，你才会领悟到你干了什么！

Compared with the bare carbon paste electrode, the anodic peak potential shifted negatively by 0.152V and the cathodic peak potential shifted positively by 0.161V for CVs of hydroquinone on the CAW modified carbon paste electrode. The reversibility of the reaction became obviously better, showing the high electrocatalytic activity of CAWs to electrochemical oxidation of Hydroquinone.

与未加碳原子线的空白碳糊电极相比，碳原子线修饰碳糊电极可使对苯二酚的氧化峰负移0.152V，还原峰正移0.161V，ΔEp减小了0.313V，反应的可逆性明显变好，说明该电极具有较高的电催化活性。

They exhibit bending deformation following the direction of the nanotube curvature. At room temperature, a nanoparticle smaller than Au 70 often escapes from the carbon nanotube surface and can be captured again by the nanotube or coalesces with other nanoparticles to form a larger nanoparticle.

纳米颗粒在碳纳米管上形成以后，小于Au 70的纳米颗粒有可能脱离碳纳米管运动，它们在脱离后可能再度被碳纳米管俘获或者跟其他纳米颗粒结合并被重新吸附到碳纳米管上来。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。