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Recent developments of clean oxidation systems catalyzed by polyoxometalates are summarized in detail. The emphasis is on the epoxidation reaction of olefinic compounds, oxidation of alkanes and aromatic compounds with the comparatively ideal oxidants, hydrogen peroxide and molecular oxygen respectively. The oxidation mechanisms are elucidated in detail.

文本总结了多金属氧酸盐在液相清洁催化氧化方面的进展,主要针对以过氧化氢和分子氧为氧化剂的烯烃类化合物的环氧化反应、烷烃和芳香族化合物的氧化反应,并详细探讨了此类氧化反应的反应机理。

Instead of environmentally toxic chromium oxidant, singlet oxygen generated photochemically was used as environmentally friendly and benign oxidizing agent to accomplish the transformation of pseudodiosgenin diacetate to diosone efficiently in a low toxic and less expensive solvent acetone.

裂解薯蓣皂甙元所得的假薯蓣皂甙元,在低毒且廉价的丙酮溶剂中,在光敏剂和光的存在下,与氧气反应,得到的产物再经酸解消除反应得到合成其它多种甾族药物的重要前体16-脱氢孕烯醇酮醋酸酯。

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For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降,而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新

Lao Qiu is the Chairman of China Qiuyang Translation Group and the head master of the Confucius School. He has committed himself to the research and promotion of the classics of China.

老秋先生为中国秋阳翻译集团的董事长和孔子商学院的院长,致力于国学的研究和推广。