A more familiar common use is in silver-coloured modern circulation coins. A typical mix is 75% copper, 25% nickel, and a trace amount of manganese. In the past, true silver coins were debased with cupronickel. Despite high copper content, cupronickel is dark bronze in colour when in storage, but is a light copper colour when polished. Thermocouples and resistors whose resistance is stable across changes in temperature contain the 55% copper-45% nickel alloy constantan.
For the past 3 months, I've been taking several popular nootropics in relatively recommended dosages. The results have been generally positive (mental stamina, desire to learn, impressive thoughts at times), however, I am experiencing the following unwelcome side-effects. -Rash and skin irritation.
General Anesthesia. The side effects of general anesthesia can include: 1  Nausea and vomiting â This very common side effect can occur within the first few days of having surgery and can be triggered by a number of factors such as the medication, motion and type of surgery.erious but rare complications include: 1  Pneumothorax â When anesthesia is injected near the lungs, the needle may accidentally enter the lung. 2  This could cause the lung to collapse and require a chest tube to be inserted. 3  Nerve damage â Although very rare, nerve damage can occur, causing temporary or permanent pain.