James Bell writes that it appears that the observation that copper sulphate pentadeuterate solutions and crystals are more green in tint than those of the pentahydrate had already been made. H. Perperot and F. Schacherl, in an account of an investigation of the vapour tensions of the ...
The aim was threefold: (1) to determine the structure of natural patinas and to relate their structure to their appearance in service and to the atmospheric corrosion of copper; (2) to understand why a brown rust coloured layer forms on the surface of some copper patinas; (3) to ...
Eventually, as western diets are usually deficient in Cu, the intake of these food colours might even trigger health benefits, but could be problematic for people with pathologies that lead to the accumulation of copper in their body [2]. 2.1.5. Caramels Caramels, with the code E150, are...