This invention relates to process for dihydroxylation of olefins using transition metal catalysts to obtain monofunctional, bifunctional, andor polyfunctional 1,2-diols of the formula . The states may be used to indicate whether an object has been added, removed, requested or updated. The illuminating lampsounder has two wires, wherein a first wire is directly connected to the battery and a second wire extends to a back of the battery along a periphery of the battery; the shell has a discharging hole below the battery.