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.
There are typically four groups of instruments used to measure grip strength: dynamometers, sphygmomanometers, vigorimeter, and computerized Baltimore Therapeutic Equipment. The dynamometers are the most commonly used and have been since the 1950s, it uses a hydraulic component to measure force in kgs or lbs (1). Jamar hand dynamometer. The Jamar weights about 1.5 pounds and measures force in kg and lbs from 2kg to 5 lbs. For an accurate reading there needs to be at least a 3-4 pound force to move the needle, and therefore may not be suitable for clients with weaker grip strength.