The included cord offers an oxygen - free copper wire for superior sound transmission, and the overall design is rugged and durable. (geekwrapped.com)
Ceruloplasmin binds free copper ions and prevents free radical — induced oxidative damage.4 In a similar manner, ceruloplasmin facilitates iron loading onto its transport protein (i.e., transferrin) and prevents free ferrous (Fe +2) from participating in free radical — generating reactions.4 (magnesiumeducation.com)
A low - voltage current runs between the two, freeing copper ions and collecting sodium and chlorine, creating a crusty blue - green patina on one pipe as the other slowly blackens and weakens. (marissaleebenedict.com)