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.
Converting decibels into unitless ratios for power gain is much the same, only a division factor of 10 is included in the exponent term: Example: Power into an amplifier is 1 Watt, the power out is 10 Watts. Find the power gain in dB. A P(dB) = 10 log 10 (P O / P I) = 10 log 10 (10 /1) = 10 log 10 (10) = 10 (1) = 10 dB. Example: Find the power gain ratio A P(ratio) = (P O / P I) for a 20 dB Power gain.