21. Chemists had assumed that hydroxyl in the atmosphere was created largely from water. 22. Oxidizing species include singlet oxygen, hydroxyl , monatomic oxygen, and hydroperoxyl. 23. This proceeds via single electron oxidation and hydroxyl radicals. 24. Firstly, it involves protonation of the hydroxyl group. 25. The hydroxyl group ( OH ) is the active site of many reactions. 26. The amine-terminated polymer resins will not have any intentional hydroxyl moieties. 27. A hydroxyl group is also installed on the adjacent carbon to yield samandarin. 28. The 4 hydroxyl groups interact by hydrogen bonding and stabilize the cone conformation. 29. In the process the TMS group migrated to the 2-hydroxyl group. 30. The radiation amplified by hydroxyl masers is the radio continuum of its host.