Two tissue electrodes are described in this paper. It is shown that a portion of intact tissue from apple or cactus can be coupled with potentiometric ammonia g
By ring-closure of 1-nicotinyl-4-arylthiosemicarbazides under the catalysis of concentrated sulfuric acid or mercuric acetate, a series of 2-(3-pyridyl)-5-aryla
Introduction The electrochemical reduction of O<sub>2</sub> was investigated widely during the past two decades. O<sub>2</sub><sup>-</sup> can react with variou
Introduction The study of metal complexes with the crown ether is a quite interesting research field, but the research has mainly focused on the metal complexes