It can cause nausea and diarrhea, especially in high doses or after long-term use. It might also pose a risk of ulcers in high doses. As a topical treatment, it can cause skin irritation. Caution is advised when turmeric is taken by people known to have gallstones; consult your health care provider first.
Gain is the ratio between the magnitude of output and input signals. Gain controls on an amplifier are basically just small potentiometers (variable resistors) or volume controls, that allow you to adjust the incoming signal to the amplifier.
Gain is a relative measure of an antennas ability to direct or concentrate radio frequency energy in a particular direction. or pattern. Gain is typically measured in dB over Isotropic point source, dBi. The analogy of an Isotropic point source. would be a sun in the center of a universe.