碳氧键

结果表明：纯化后的HA是分子质量较小的部分，水溶性较高，具有羟基、羧基和碳氧键等极性基团；

The results showed that the humic acid was the lighter part of the whole molecule and had high aqueous solubility after purified . The binding sites of HA and heavy metal ions located in the carboxyl and hydroxyl of HA .

火山热液中的高温酸性组分（H2S，SO2，HF和HCl等）以及过渡金属元素可促进干酪根中碳-氧键、碳-硫等键的断裂，对油气生成具有催化作用。

Acidic components with high temperature ( H 2 S , SO 2 , HF , HCl and so on ) and transitional metal elements in the volcanic hydrothermal fluid may promote the bond fission of C-O and C-S in kerogen , and has catalytic action on hydrocarbon generation .

对羰基中碳氧双键键能的理解

Comprehension of Double Bond Energy Between C and O in Carbonyl Group

结果表明，铝合金经三乙二醇二甲醚低温微波等离子体改性后，表面得到一层均匀、致密的涂层，其化学组成为类聚乙二醇结构，表面主要聚集有大量的碳氢和碳氧极性键；

Results demonstrate that the modified coating on the aluminum alloy is uniform and closed , which composed of PEG - like structures with carbon-hydrogen and carbon-oxygen polarity linkages on the surface mainly .