When naphthalene gas is inhaled, the body breaks it down into other chemicals that react with cells in the body and damage tissues. How naphthalene kills moths is not understood. The odor is thought to be unpleasant enough to drive animals away in repellent products.aphthalene is made from crude oil or coal tar. It is also produced when things burn, so naphthalene is found in cigarette smoke, car exhaust, and smoke from forest fires. It is used as an insecticide and pest repellent.
Grip strength can be measured quantitatively using a hand dynamometer. However, the methods used to characterise grip strength varies considerably, for example with regard to the choice of dynamometer or the measurement protocol used. This has the potential to introduce measurement error.
If you do not have a racquet and need to select a grip size, you can print out the grip sizing chart. Alternatively, you can measure your grip using a ruler. Place your hand palm up and locate the two nearly parallel lines that run across your hand. Place the ruler on the lower line (closer to your wrist) and measure with the ruler to the end of your ring finger.