查询词典 carbons

If I hadn't any fresh carbons for her when I showed up, she was crestfallen.

为此我第二天只得带着那个小姑娘上卢森堡，跟她一起玩上两三个小时。

On the basis of considerable experiments, items of granular activated carbons for the decoloration in the production of citric acid were decided.

在标准的研制过程中各项指标的确定主要采用了具体实验和采样统计的方法。

And also we founded that the resulting porous carbons have good thermal stability, resistance oxidation and electric character.

产品多孔炭具有良好孔结构性能以及良好的热稳定性、抗氧化性能和半导体材料特征。

As a mixture with high boiling point and a crystal liquid with colors from primrose yellow to brown, fusel oil is the general term of monohydric alcohols with more than three carbons, and is one of the important elements contributing to the flavors of liquor.

杂醇油是一类高沸点的混合物，是淡黄色至棕褐色的透明液体，是三个碳以上的一元醇类物质的总称，是构成白酒风味的重要成分之一。

These reactions can conserve three of every four carbons diverted to glycolate by forming triose.

这些反应能把四分之三的乙醇酸的碳保存在三碳糖中。

Heated gas in the comet's tail form petrol chemicals due to the flashes of lightning and intense heat due to passage over open volcanoes, and these petrol carbons rain down, a sheet of flame falling to Earth.

完全被消耗完了。

The effects of hydroxyl substituents on the chemical shifts of the adjacent carbons are also discussed.

本文讨论了羟基引入之后对邻近C的化学位移的影响。

The Diels-Alder cycloadditions of [60] fullerene for preparation of optical limitingmaterials are discussed in chapter 3 and 6. Soluble cycloaddition derivatives of 〓aresynthesized by the reaction of 〓 with indene,1,1'-biindene andcyclopentadiene derivatives.〓Particular, the Diels-Alder cycloaddition of 〓 with1,1'-biindene under controlled conditions affords the stable monoadduct 〓〓of novel structure, which was confirmed by HPLC, FTIR, FD-MS,〓NMR,〓 NMR, HMQC and HMBC spectra, Its two bridgehead cage carbons resonate at70.91ppm, The 〓 NMR spectra showed 38 lines consistent with the 〓 symmetryassociated with [6,6] addition. The 〓 shows similar optical limitingproperties to that of 〓 in toluene for 8ns laser at wave length 532nm. Moreover, thehigh solubility of this adduct in polar solvents such as THF, acetone enables itsincorporation into sol-gel glass matrix. The thin films prepared via the sol-gel methodshow improved OL behaviour compared to those of 〓. The langmuir-Blodgett filmformation and uv-visible absorption of 〓 are also investigated. LBmonolayer of this compound is prepared on the air-water interface at 〓 mol/l. In chapter 4, three water-soluble derivatives of [60] fullerene: fullerol(1), theaddition product (2)of fullerol (1)with polyvinylpyrrolidone and fumaric acidderivative of 〓(3) are synthesized and characterized.

通过Diels-Alder环加成反应，用茚〓和1，1'-联茚〓及取代茂合成了一系列可溶性的〓环加成衍生物，发现可控制反应条件，使1，1'-联茚与〓反应，并高产率地得到具有新颖结构的单加成物，用HPLC、FTIR、FD-MS 及〓、HMQC、HMBC等多种波谱技术对其结构进行表征，测得它的两个〓杂化的桥头碳的化学位移为〓ppm，证明生成的衍生物为6∶6闭式环加成，〓NMR谱中共给出38个信号，表明〓联茚衍生物分子具有〓对称性；在波长532nm，脉冲宽度8ns的激光下，〓联茚衍生物的甲苯溶液的光限幅性能与〓的甲苯溶液相近，由于〓联茚单加成衍生物熱稳定性好，在四氢呋喃，丙酮等极性溶剂中溶解性好，能分别均匀地掺入溶胶-凝胶中，已发现它的溶胶(so1)光限幅性能优于纯〓的光限幅性能；使用Langmuir-Blodgett技术将〓联茚衍生物在空气和水的界面进行了LB单层膜和多层膜实验以及UV-Vis吸收谱研究，通过等温压缩曲线测试，证明浓度为〓〓时，〓联茚衍生物能够形成单层膜。

The effects of absorbing organic extracts from drinking water by five kinds of China made activated carbons were compared using three cytological indexes:the rate of inhibition cell growth,the micronucleus rate of binucleated cellsand the cytokinesis block proliferation index.

采用三项细胞学指标(细胞生长抑制率、双核细胞的微核率和胞质分裂增殖指数)对 5种国产活性炭吸附饮用水中有机提取物的作用进行了比较。

Anisodamine causes interdigitation in DPPG, whose phospholipid molecules insert into the opposite lipid layer with the ends of the acyl chains near to the 5th carbons of the opposing lipid molecules, whereas anisodamine can not cause interdigitation in DPPC existed generally in membranes.

山莨菪碱诱导DPPG脂质体交插结构，其脂酰链末端插到对面分子层脂酰链第五个碳原子的位置，而生物膜中普遍存在的DPPC不能被山莨菪碱诱导形成交插相，但DPPG／DPPC混合物则能形成交插相，即伴随DPPG的交插，DPPC分子也发生交插。

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。