carbonic hypochloric periodic acid acid acid 碳酸 次氯酸 高碘酸
Some of the common methods used for decomposing and
dissolving samples for atomic absorption methods include treatment with hot mineral acids; oxidation with liquid reagents,
Abstract: Chemical studies of interaction between 6mercaptopurine (巯基嘌呤) and DNA were performed in this paper. It was found that both reduction and oxidation peak currents decreased and the peak potential also shifted positively with the increasing of time and DNA concentration, respectively. The result showed that the DNA reacted with 6-MP to form an electrochemical non-active complex. The composition of the complex was 1:1, with the combining constant of 5.17×106.
When copper and tin were heated together, the copper atoms and tin atoms linked up with metallic bonds, producing the alloy bronze, which is harder than either copper or tin. In the Bronze Age, starting at about 3600BC, the hardness of this metallic alloy made it the dominant material for tools and weapons. Bronze was the first metal that could hold a sharp edge.