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- a quaternary carbon atom 季碳原子
- quaternary carbon atom 季碳原子
- Having a ring composed exclusively of carbon atoms, as benzene. 碳环的有一个仅由碳原子组成的环的，如苯
- Every carbon atom has four bonds. 每个碳原子的价键为四。
- The compound of above of 10 carbon atom calls polysaccharide. 10个碳原子以上的化合物叫多糖。
- Now we are among the two innermost electrons of the carbon atom. 现在，我们处于碳原子最里面的两个电子之间。
- Moreover, there is a chiral quaternary carbon in the1-hydroxyethylidenediphosphonic (hedp) ligand. 证实1-羟基乙叉-1,1-二膦酸配体(hedp)中的季碳为手性碳原子。
- These ligands were found to be very effective in construction of quaternary carbon centers by using asymmetric allylic alkylation. 这类配体在前手性亲核试剂的不对称烯丙基化构筑手性季碳中心的反应中，显示了较好的反应活性及对映选择性。
- At the end of the series of reactions each carbon atom is recovered. 在反应的最后每个碳原子都可以回收。
- Having a carbon atom attached solely to one other carbon atom in a molecule. 一代的分子一个碳原子点和另外一个碳原子相连的。
- A polymer in which the repeating unit contains two carbon atoms linked by an oxygen atom. 聚醚一种聚合物，其中重复性的单位含有由一个氧原子连结的两个碳原子
- The electronic structure of a quaternary alloy has been investigated using EHT band calculation method. 用紧束缚能带计算方法(EHT)研究了标题多元合金的能带及电子结构。
- In neutral solution a quaternary complex of aluminium can be formed in red colour with NaF, xylenol orange(XO) and cetylpyridine bromide. 在氟化钠、二甲酚?~(XO)及溴化十六烷基吡啶(CPB)存在的近中性溶液中,铝可形成红色的组成比为Al:F:XO:CPB=1:2:1:1的Al-F-XO-CPB四元络合物。
- Carbohydrates contain choral carbon atoms. 碳水化合物含有手性碳原子
- The pullulan aminoalkyl ether according to claim 1, wherein the pullulan aminoalkyl ether is in a form of a quaternary alkylamine salts. 根据权利要求1中的普鲁兰氨基烃基醚，它应为自由胺形式或有机、无机盐形式。
- Using lignin exstracted from papermaking black liquor as a raw material,the synthesis of a quaternary ammonium salt of lignin has been carried out. 以从造纸黑液中提取的木质素为原料，合成木素季胺盐絮凝剂。
- Carbon atoms provide the backbone of living matter. 碳原子提供了生命物质的骨架。
- Although QPSK can be viewed as a quaternary modulation, it is easier to see it as two independently modulated quadrature carriers. 有时也称作四比特PSK、四相位PSK、4-PSK，在星座图上看是圆上四个对称的点。
- These carbon atoms are therefore chiral. 因此,这个碳原子称手性碳原子。
- With synthesis of a quaternary ammonium gemini surfactant as an example.The process involves two steps reaction: quaternization reaction and urethane reaction. 摘要以合成一种季铵盐双子表面活性剂为例，过程包括季铵化和胺酯化两步反应。
