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.
Side effects of Hormone Therapies include: 1  Breast pain or enlargement. 2  Cardiovascular events. 3  Cholesterol level changes. 4  Erectile dysfunction/lower libido. 5  Diarrhea and/or constipation. 6  Increase in belly fat. 7  Increased risk of osteoporosis. 8  Concentration, learning, and memory problems.