For example, copper compounds tend to be blue and elemental sulfur yellow.

The green color is often attributed to oxidized copper compounds, such as copper chloride.

"They were specifically set to attack the copper compound of the superconductor, nothing more."

Haemocyanin is a copper compound used like haemoglobin.

It is often made using combinations of potassium nitrate and copper compounds.

As verdigris consists of various poisonous copper compounds, one should always wash one's hands after handling.

Hemolytic anemia resulting from the treatment of burns with copper compounds is infrequent.

One of these used regular injections of copper compounds, including cupric oxide.

The terrestrial plants had no enemies, because all the native life on the planet was based on copper compounds, not carbon.

Replies: There probably was some copper compound in the scale.