| Extraction spectrophotometric determination of vanadium in natural waters and aluminium alloys using pyridyl azo resorcinol and iodo-nitro-tetrazolium chloride. |
| Both compounds include a ring of five carbons and one nitrogen, a pyridyl ring. |
| A pyridyl terpenoid ether has also been studied for IGR activity against mosquitoes. |
| The argument was whether the ethyl subsitution is the skills in the art, luckily, witness suggested that chlorination on Pyridyl ring is common but not methylation. |
| At low pH, the amine groups of the pyridyl rings will combine with protons to get ionized groups, which are more hydrophilic and then adsorb more water. |
| Meng et al. have investigated meso-substituted porphyrins, synthesized by sulfonation or methylation of the phenyl or pyridyl groups, respectively. |
