an aldehyde + O2 + H2O => a carboxylate + H2O2 + H(+)
an aldehyde + o2 + h2o => a carboxylate + h2o2 + h(+)
an aldehyde + O2 + H2O => a carboxylate + H2O2 + H(+)
an aldehyde + o2 + h2o => a carboxylate + h2o2 + h(+)